EBAY TURBO TITANS-4.8L vs 454 (GT45 TURBO)

[@SoLSamuraibloodblade]

So what you’re saying is I should get two Ebay turbos for a 454👌

[@richardholdener1727]

always

[@crazyasspotter]

Now put twin eBay gt45s on both engines and let's see what happens.

[@meteor5452]

What about a Chinese truck turbo? Like their version of a Detroit diesel 60 series turbo?

[@mikesorchy2677]

Was thinking the same ... maybe 3 or 4 hahah 🤔

[@mikesorchy2677]

Keep adding wu tang war whistles until the back pressure is acceptable on the 454 .. might work 🤔🤷🏻‍♂️be cool to see 👏🏻👊🏻

[@BEANS-O-MATICtransmissions]

Great video ! Especially for those to learn the importance of the hot side flow. Now ! Put 2 of those GT45s on the 454 and lets make some noise !!! Let's see what it can do Richard !

[@dragbikedemon]

Remember when a small block that made 400 HP was a BEAST?

[@knockingontheclouds1153]

Yeah, I'm building a 355 Vortec that won't see over 350hp, lol.

[@dustinvanwinkle7271]

That was a lot back in the 80s new corvettes were maybe 200 at best lol

[@knockingontheclouds1153]

@@dustinvanwinkle7271 that is spot on!

[@gnarkiller]

@@dustinvanwinkle7271 those things were straight turds. My factory Honda Accord dookies on my friends iroc without even trying

[@Hitman-ds1ei]

Yes, back in the day, but what is surprising is when doing old school motors or period correct if you like they are making way more hp ie look at 370hp LT1 350 if you do same motor now hp/torque result much better as understanding of what makes power and what doesn't is much better

[@armedrepublic]

Doing the Lord's work as usual

[@richardholdener1727]

he would use twins

[@armedrepublic]

@@richardholdener1727 sometimes the Lord's on a budget

[@Turbo_Todd]

@@richardholdener1727 please, a lot of people asking about twins on both. I have a very similar Gen 6 454 with no turbo plus 5.3/VS80

[@johnboy9769]

Oh Richard we need a twin gt45 454 soon lol

[@johnparrish9215]

Yes please, the same cheap gt45s, we need the ultimate Cheap Mud Truck engine...........lol

[@Turbo_Todd]

Yes please

[@blownlh]

i dynoed my big block today with two of these , its blo through carby so not the best but at 6000 rpm it made 717 hp at treads with 824 nm

[@briantownsend8425]

Man I really enjoy your videos you are like Dr turbo you are teaching me everything that I ever wanted to know about Turbo as I'm getting ready to retire from being a mechanic I'm getting ready to start a new life at the drag strip so I've been watching all of your turbo videos and you really do your homework I appreciate you very much thanks for all the hard work

[@richardholdener1727]

lots more coming

[@GhostCider]

Years go by but the message is timeless. Awesome video.

[@soundslikealot]

Thank you, great comparison and explanation! I think it would be cool if you'll make some kind of Q&A videos time to time because there's a lot of questions in the comments!

[@damianellis3554]

I think your videos are awesome What I would like to see is a comparisons of a front-mounted turbo system and a rear-mounted turbo system maybe adding some extra link pipe to simulate the rear turbo system the pros the cons to boosters as well as a back pressure

[@charlesnorris9178]

I would also like to see this!!!

[@richardholdener1727]

the problem on the engine dyno is that it doesn't show boost response well because of the artificial initial load

[@charlesnorris9178]

Curious if the added length of exhaust piping would cause a loss in efficiency via thermal loss, weaker pressure wave to turbine. May cause an increase in exhaust backpressure to reach same boost level.

[@LEOhopeful]

You can't simulate a rear mount. Most rear mounts are 80%+ "straight" runs of piping. 12' of bent piping to fit the dyno cell comfines is not anywhere close to the same "straight" length I was intrigued by the STS serious 20 years ago, but we've come so far with turbo/EFI technology and fabrication, it almost seems easier nowadays to create an "engine mounted" turbo set up

[@LEOhopeful]

You can't run a rear mount without knowing how to weld....so might as well make a real kit lol Again...they intrigue me, and DO work, for sure. But not feasible to recreate on am ENGINE dyno, both from fabrication, and accuracy.

[@dustinvanwinkle7271]

Would love to see a turbo show down from cheapest to mid priced turbo on a gen 4 5.3 lm7 with out any up grades

[@Turbo_Todd]

This please

[@richardholdener1727]

you want to run turbo testing on a stock 5.3L? no cam?

[@invujerry]

Richard Holdener after buying a 5.3 suburban for $1200 I’m very interested in what it would do. Although I’m sure I’ll do both eventually.

[@alexz1232]

I would personally love to see any A vs B turbo testing, with spool times, peak HP, and back pressure. Any engine config you feel is sized to match the turbos would be fine.

[@dustinvanwinkle7271]

@@richardholdener1727 btr truck stage 1 cam I pull a trailer a lot don't want to lose the low rpm torque

[@vwdarrin]

I find these videos invaluable I have work for several top engine builders guys that have world records hanging on their walls and Wallys you speak the same language I could listen to you and Steve talk all day long I cannot imagine the information that you have stored in your heads my passions are VW motors air cooled fast once of course I am getting ready to build a front engine car there are two cars currently that are fast running in the low sevens close to 190 miles an hour I take a little bit snippets from every video you make and will apply them to my next build and I know you have showed me how to find a couple more horsepower I appreciate the videos and you sharing your knowledge

[@richardholdener1727]

and we learn from everyone like you that comes to westech

[@SreidMX]

Great job as usual!! Volume on point! What would be interesting would increasing the turbine size and A/R and leaving the compressor alone allow this particular turbo to work on this motor and how that effects the output and back pressure. Ex I see this in would be a guy who wants 700hp but below 5k and have it live, not at 22psi of back pressure.. seems to me that a 96mm hot side would be min with a 1.2ish A/R as a guess

[@dilsher12]

The compressor is pretty much at its limit at about 700-750hp , so bigger exhaust wheel will help with the back pressure but won't make much more power .

[@EGGINFOOLS]

Amazing video. Just amazing. Can you do a twin turbo setup comparison between a 5.3 and 6.0? I would love to see this same test

[@drakeolson2539]

That was a great lesson in back pressure!!! Thank you!!

[@ElPants21]

Way better audio on this video. Didn't have to play with the volume while watching it because you balanced it well nicely done

[@swagstein9322]

Rich, you're awesome dude! Someday you'll have a mil+ subs!

[@siclt1]

I bet you can do the robot really good, by the way your videos are awesome. But would like to see a few clips of the dyno runs

[@necrofool]

Always wondered how the same size turbo does on a much larger engine. Thank you, love your series!

[@CHINGY1993]

All your videos are great clear layed out no bs info. Keep up the great work

[@davidleslie6207]

A good follow up to this would be to add twin gt45 to the 454 and run the same boost (9). Show the difference in back pressure and the affect it has on HP. Another interesting test would be to run the 454 with just one manifold going to the single gt45. Then have the other manifold with straight pipe. This would be good to see if this works. Then guys could get half of there turbo projects going and on the road then when time and money permits add the second turbo.

[@richardholdener1727]

I tried running a single with one side-it didn't work but going to try a smaller turbo -twins vs single is on the list

[@jimmyj2563]

How about a twin turbo build specific for mid range torque.. I have one upcoming and I’d love to get across some of the issues I might face. Great format and great content thumbs up from Australia

[@stevesolo16]

I like it when you post turbo backpressure. Everybody is always talking about the inducer size of the turbo when the exducer/hot side plays just as much a part in the power your turbo is making.

[@notinterested5787]

I realize this is an engineering exercise, to learn things and pass along info, and i appreciate it . You asked for suggestions, i would like to see you plumb an engine so it actually fits in a car. I couldnt get either of these engines in my garage , let alone my car, the way they are set up for the dyno.

[@richardholdener1727]

There is no need for us to fit the motor to a particular chassis-it just need to fit the dyno for our test-the results wont change unless the fitment creates an unusual restriction

[@fixins]

Dig the show! With all the buzz of late, I hope there's a test of the 1840-P cam in the works!

[@richardholdener1727]

Doing SS2 vs the World soon

[@Turbo_Todd]

We all know SS2s greatness is price/value for what you get which helps the super budget guys. It will not be a HP leader as Sloppy Matt has said.

[@Turbo_Todd]

I'm looking forward to the comparison in any case

[@dr1ver267]

Richard you’re the reason I’m ordering a DNA motoring GT45 (they only $152 at the moment!) for my 4.8 as of your first video about it recently, and this new video comes at a perfect time to keep me motivated to buy this thing. Thanks for all you do, I’m learning so much!

[@TurboDog73TX]

Richard, did I miss the "big bang" big block? Still waiting to see that. Kool demonstration of backpressure choke.

[@richardholdener1727]

have not run BBC BB yet

[@Darkhalfcustoms]

Finally the Gen 6 is here. Thank you #RichardHoldener.

[@Turbo_Todd]

I have a gen 6 454 in my 69 vette. Very similar heads/ cam/ intake Thought about a small turbo on it for street.

[@marcs8563]

The throttle response and power from that 454 would make for an awesome daily driver pickup

[@chrishansen7004]

Bet you wouldn’t like the gas mileage tho lmao

[@jamieknight9636]

Great work Richard, exactly what I've been considering. Well done

[@buiItnotbought]

I remember when i first used the borgwarner match bot calculator. Thought i would be happy with 800hp and 15 psi. Here i am trying to crank 30+ out of the billet s475 on my 383. The calculator says the compressor map efficiency falls off above 5500. Which is exactly what my boost curve looks like. Long story short i need an 88mm haha

[@danielsullivan9865]

Need twin 69 or at least a 94

[@buiItnotbought]

@@danielsullivan9865 Daanng was just lookin at the on3 94mm too. Bw matchbot said 88 was good till like 6500. You think i need 94?

[@danielsullivan9865]

@@buiItnotbought that'll be a really good choice

[@buiItnotbought]

@@danielsullivan9865 im kinda worried about transient response because i have a 4 speed. And i granny shift lmao. And no im never getting an auto those are lame haha

[@danielsullivan9865]

@@buiItnotbought stick shift your going to run 8 second quarter👍 if you're in California we want to meet up with you. We run stick shift also

[@flatbrokemodsquad4241]

I'd like to see a stock 283 with cam and springs, everything else factory, compared to a 4.8 equipped the same run n/a and boost. gt45 should match the 283 better than 454.

[@Turbo_Todd]

Actually you can use aftermarket heads on a 283. Would kinda be interesting to see how bad the 4.8 spanks the old tech

[@richardholdener1727]

A 283 in not great-small bore-limited head choices and its hard to make power unless you bore them to allow decent heads. It takes some doing to make 1 hp per cube with factory power pack heads-a 4.8L does that with room to spare and responds even better to mods

[@flatbrokemodsquad4241]

Anthony, just to see the difference between old school and new school of same engine size. could do with the 5.7 liter and 7 liter old/new combos.

[@kalanirobb54]

Not even close

[@kalanirobb54]

Better combo ? Dz style 308 inch with trick flow heads twin 45s , gnarly 2400 lbs. 62 chevy 2 ,456 gears sequential shift 6 sp. Super low slung 29"×18" tires on15" wheels !?!?,bring it on please!

[@lukassonntag3956]

I feel porting that exhaust housing would be really beneficial

[@jeremiahpike6372]

The housing was just entirely too small for the 454. Porting would gain some power but really just picking the right sized turbo to begin with would make much more power than porting the housing on a improperly sized turbo. The 454 should have easily made over 1000 hp providing the internals would hold up at 14 psi of boost with a properly sized turbo.

[@dilsher12]

4.8 shall always be great

[@nessar2378]

dilsher12 and reliable

[@thatturbotruck]

Richard I would be interested in a 5.3 vs 4.8 boost test same cam same turbo and do a 6 8 12 16 20 psi test to see if the 4.8 starts to close the gap or if the 5.3 will stay ahead. Great videos!

[@richardholdener1727]

That will depend on the hot side flow of the turbos, but if there is enough flow, the 5.3L will always make more power (assuming same mods)

[@thatturbotruck]

I know the 4.8 can make more power from a smaller turbo than a 5.3 can due to the turbine housing flow. I like them both but the 4.8 has a great rod ratio. Im torn between the two for my mustang project. I have a 7875 turbo with a .94ar hotside now.

[@MLFranklin]

Dude, this is fascinating stuff. I can't get enough of it.

[@rhodehunter]

I want to see twin gt45 on the 454

[@carportshenanigans5918]

I suspected the housing would choke off the 454, but it was cool to see just how bad it was. Nearly 3:1 drive pressure= no bueno! Love these tests.

[@Bmc1025]

I thought it was cool to see that under normal towing and highway Rpm it looked safe and made a ton of power down low.

[@carportshenanigans5918]

It was very interesting to see that monster torque it was supporting down low.

[@scottnadermann9490]

It would be interesting what would be gained or given up with a different A/r exhaust housing. Also to add in a external wastegate and blead off some EBP at higher rpm on both motors to see if the falling boost curve would flatten out and cause more power.

[@Turbogto_guy]

Scott Nadermann I agree.

[@richardholdener1727]

there are two external waste gates already

[@myoneblackfriend3151]

I am interested in seeing bone stock 4.8 (no mods at all) plus boost with various turbos. Maybe even other LS/Vortech engines too. I will look through what you have. I have also bought one of your books and I do recommend your channel. Thank you and well done.

[@richardholdener1727]

stock 4.8L makes 335 hp (the way we test it)-at 14.7 psi makes near 670 hp

[@myoneblackfriend3151]

Richard Holdener Thank you for the reply. I will "stay tuned."

[@projectgattago]

That 454 would make for an awesome truck/towing combination. The torque curve looks like a dining room table! I wish you had a more technical discussion of not just the back pressure numbers, but more details about when the delta P ratio becomes an issue. As the test shows, if the application is geared toward more torque, having a delta P number of 2 or even a little higher, as was the case with the 454, is not a huge problem.

[@richardholdener1727]

high back pressure and towing are actually not a good mix-there are much better turbo choices for the BBC-even for low speed applications-I want top try routing exhaust from 6 of the 8 cylinders to the turbo -I already tried just 4 from one side

[@projectgattago]

@@richardholdener1727 I don't know much about that China GT45, but presumably what's really needed is a turbo with a bigger exhaust wheel and a modestly sized compressor wheel. Maybe something like a BW S472SXE?

[@jacksz28]

Twin gt45 454!

[@richardholdener1727]

yes

[@backyardbuilttrucks1]

What i am using on a 468

[@Turbogto_guy]

Different a/r housings would be a very interesting test along with different turbos on the ls motor.

[@backyardbuilttrucks1]

468 512 casting bbc 315 /121cc flotek heads SRP pistons, callies rotating assembly 10 to 1 , twin gt45 turbos howards 297/308. 640/640 hydraulic roller 1400 all day long safely.

[@JamesDavis-mm9yh]

Btw I love your videos. Keep the information comin broskie

[@65Coasty]

Great video. Good to learn about boost and backpressures

[@Sleeperdude]

Twin gt45s on something

[@a.jrostirolla7673]

Should do a video on “how long will the chinesium turbo last !! “ nice video Richard 🍻👍🏻

[@richardholdener1727]

some of mine have been working for 7+years

[@petechongris8683]

Reading the comments it is clear, twin turbo 454!

[@johnparrish9215]

Honestly, that 454 would make a Hell of a Tow Truck engine.

[@ae8620vlevin]

Not really as that back pressure with a load on the truck would make the egt jump super high and my guess that wouldn't be good.

[@johnparrish9215]

@@ae8620vlevin The backpressure on a Cummins or Power Stroke is between 40 and 60 psi, far less than the 20 shown here.

[@warhound7781]

@@johnparrish9215 Ya, it can handle that due to it being a diesel. Apple and oranges don't compare....

[@johnparrish9215]

@@warhound7781 Metallurgy and Heat transfer doesn't care what the heat source is. The only meaningful difference is in the width of the valve face between diesels and gasoline engines, the diesel being wider for better heat transfer.

[@Turbo_Todd]

@@ae8620vlevin could you just bleed off backpressure after reaching desired spool. This would help hold the torque at an optimum level, but bleed pressure to reduce EGT. ..or am i wrong on this?

[@wakjob961]

Like to see dyno runs of different range spark plugs and different gapping under same circumstances.

[@mxguy2438]

Great test, i haven't seen many dyno tests where they log exhaust backpressure, good to see. MORE DATA please Richard! There is a lot to get out of your videos, beyond what you discuss if you just give us more data. Even if you don't want to discus it, just flash data on the screen for 2 seconds at the end, table format is denser and more accurate. I would love to see compressor discharge temps and pressures, Intake manifold temps and pressures. Airflow data. Does this turbo have a compressor map? Didn't you talk about an 8 channel egt/wideband in a previous video? Timing, power/torque curves in table format.

[@richardholdener1727]

There is no map for this turbo that I know of-we don't usually log airflow to the turbo. We sometimes run 8 O2s and/or EGTs, usually monitor boost and back psi, sometimes run air temps in and out, just depends on the test

[@updragracer]

Thanks Richard , you are awesome man .

[@christianr3536]

Love your Videos!! Good stuff

[@taz4100]

Would like to see you test some on3 turbos. Specifically the 76mm was real popular for cheap power a few years ago. They seem to be limited on the exhaust side

[@richardanderson9092]

Would love to see you do timing runs on naturally aspirated engines. Maybe mix in an octane test as well.

[@knowbull5hit590]

Anthony Thomas it would more be for the sake of learning about timing and what an engine likes more so than just making a certain combo. He could do something like that with the many engines they’ve already been using

[@NBSV1]

It would depend on a lot of factors so what timing works best on one engine wouldn’t always work on another engine. In theory you want as much timing advance as it will take before spark knock. That way you’re getting the longest duration of combustion possible.

[@keithstella2278]

Fantastic educational video! Keep up the great work

[@RadDadisRad]

Looks like running a gt55 @ 5-8 pounds on a 454 will be a better turbo. I like small turbos, high compression and low boost. Torque curve is phenomenal and so is the response.

[@kevinengland4042]

That's a great recipe. I had a gtx55 on a 440 bbc with 11.5:1. It was a blast....but it's time for more turbo.

[@XxMusclecarsxX]

that gt45 bbc would make a strong tow rig 750lbs!

[@Mr700whpfocus]

I love the video. I wish you made a video like this with the older mk1 ford focus zx3 and possibly the ford focus svt

[@rweasel801]

I love watching you videos, always so informative. Could you point me in the direction of some info for determining best turbo size?

[@zmanphx]

Boost pressure is relative to intake restriction. Hence larger displacement has less boost at given horsepower. Should compare intake flow to back pressure. The turbo size is the constant.

[@davidcunningham00]

hell 293 vs 454 that's 163 cubic inch's different, all that CFM makes a big difference. just like having the right size exhaust

[@paxtonspeed]

Put two of them on the 454!

[@81LsJoce]

i always wondered what a ford 7.3 powerstroke (garrett gtp38) turbo straight out of the scrap yard would do on this little 4.8

[@armdrop1oh177]

more power than anyone could ever really use on the street from that 454.

[@brucestirewalt7951]

I love your videos man dont change what your doing how far have you pushed a stock 4.8?

[@richardholdener1727]

we did over 1200 hp on the original Big bang 4.8L SBE

[@brucestirewalt7951]

Im going to go look that up thats awsome

[@ts302]

Another great video Richard! Now I'm questioning why two 700HP engines have different exhaust volumes, ie the BB with more exhaust back pressure than the SB at the same HP. Isn't HP (then exhaust) a function of the amount of air/fuel in the cylinder during the power stroke, be it NA, boosted, BB or SB? Thank you.

[@richardholdener1727]

Look at the average amount of exhaust that must flow-the average exhaust flow (power production) of the BBC is much higher-it has to flow more total exhaust in the same amount of time through the same flow orifice-hence higher back pressure

[@ts302]

Hey Richard, after posting my question, I decided to review the video. At 700hp (SB=5900rpm, BB=5200rpm) the exhaust back pressure was almost the same (SB=18psi, BB=19psi). The BB's increased back pressure is due to the increase in HP.

[@hgwaterous]

In a pure drag car, they will likely run similar 1/4 mile et and mph. In a heavy street car, the extra torque of the 454 will make it considerably faster from a stop or rolling start.

[@199412valve]

A shoot out between a ebay GT-45 and a Garrett GT-45 would be pretty cool to see

[@richardholdener1727]

I wish I had a real Garrett GT-45

[@johndelta00]

I'm so glad I get to exist in a universe that has 700hp turbos for like $150. What I still don't understand is how Precision can try to justify a $1500 price tag for a turbo that is MARGINALLY more efficient at making power.

[@dilsher12]

Lol and only marginally more reliable as well

[@richardholdener1727]

I've always had good luck with the Precision turbos I've run

[@Turbo_Todd]

Rephrased, how does China make such good cheap turbos....copy US made shit, use a plentiful and willing cheap labor force. Global economy.

[@xalos700r]

Compare sloppy stage 2 vs the btr turbo stage 2 cam using that 4.8 test motor.

[@ryanaxberg9263]

you should ask nicely

[@blakemarkum]

Fuel injected turbo setup vs carbureted turbo setup would be cool to see on the 4.8

[@xozindustries7451]

I’m a little surprised you didn’t run the stock vortec heads on the 454, of like to see a comparison between the stock heads and these heads

[@richardholdener1727]

I did a Vortech head vs after market head on a Vortech supercharged Gen 6 (SBE) 454. The difficulty is that the stock heads are 102 cc and every decent BBC head is closer to 120 cc (edel has 110 cc), but the stock pistons don't allow much P-V so milling is another problem. Installing after market heads that flow better drop the compression significantly (like our Darts). Despite this, head swap was definitely worth power

[@xozindustries7451]

Richard Holdener I’ll have to go back and look for that video, missed it, thanx for the reply

[@Turbo_Todd]

@@richardholdener1727 I have Edelbrock 100cc BBC heads on my SBE Gen6 454 with 2.125in headers, Performer RPM roller cam, fuel injected. It makes about 550hp and the heads keep compression near stock gen6.

[@ChadLisonbee]

We all love LS’s. But it would be nice to see a budget twin turbo BBC shootout. Gen IV VS Gen VI stock for stock nothing more than cam and springs cheap turbos, and proper fueling on both. 725 lbft torque at 3500rpm isn’t anything to sneeze at. Can either of the them in stock form, survive north of 1000HP? Even if you don’t do a shootout, I’d really love to see how far these old girls with a four bolt main can go before the big boom.

[@richardholdener1727]

I have the big bang BBC coming up-we will see how far we can push a SBE 454-its already gone well north of 1000 hp

[@ChadLisonbee]

Not sure how I missed that video. I thought I’d seen everything you put out. Time to start searching. Because of old technology it seems like people still think there’s no such thing as a budget BBC.

[@LandonRoy-cv9rt]

The amount of information and level of expertise Richard has is unbelievable to me lol

[@weallsobad7320]

Well now that youve edi-fi-cated us on back pressure restricting HP & TQ, then the obvious mystery is what now happens between the 4.8 & the 454 when you use twin turbos or a bigger turbo sized for the 454! Great work here grasshopper!

[@richardholdener1727]

i did run an S480 on the BBC

[@weallsobad7320]

@@richardholdener1727 . Did you run it on the 4.8 as well so I can go back & see the results? Dam Bud. Is there ANYTHING you havent thought of? I really look forward to the info you bring us. Especially the LS/Vortec testing. I have a 4.8, a 5.3, a 6.0 & a rad 454 sitting in the garage. And I have an 88 Monte SS, & an 88 Farm truck both with 305s waiting for transplants! You keep showing me new stuff & I keep moving the goal posts. The ultimate goal is street only & im too old to race. But some punch would be nice when i mash the pedal down! If you think about it, any one of them would be a massive improvement on the old 305s. Thx again Richard.

[@weallsobad7320]

@@richardholdener1727 . Oh & btw, is it me? Or do you move your arms much less now than your earlier videos? I used to almost dodge the video screen when you were on it. But now that I am a big fan, I dont notice it! Its 1 of 2 things: 1: You're more relaxed in your delivery... or 2: Now that Im a fan, Ii don't notice any flaws you may have because everything you create is so interesting & informative! Either way, I always look forward to your next creation. And on a personal note, if you ever find yourself in the Great White North, skip over to Oshawa, cause Ive got a big juicy Rib steak & potato ready to go on the bbq. Along with some cold beers, Im sure you wont forget it anytime soon. Thats assuming I stop asking questions long enough for you to actually eat your dinner!!! Once again, cant tell you how much I appreciate the knowledge you pass on.

[@delwinruffins5977]

U did a test with ebay turbo, slot of people are saying the ebay procomp ls3 heads are junk, I would like to see a test with them vs stock 823s NA & boost

[@grumpysteelman]

This was a fun test. I’d like to see a cx-racing / dna / on3 shootout against similarly advertised PTE, BorgW, Garrett, and turdbonetics turbos. Same wastegates and plumbing - cast vs billet wheels would be awesome

[@matthough5448]

Hi Richard no bullshit testing I love it. But would the fact that the 4.8l with the turbo suitable stage 2 cam with wider lsa than the 454 n/a suitable cam, make any difference to the back pressure level? Keep up the good work, thanks Matt

[@richardholdener1727]

I think the majority of the back pressure is a function of the power curve of the 454-cams do have a minor effect after you factor out the change in power (that always effects back pressure)

[@SULUKI1]

Brilliant video! Very informative thank you! 1 question. How do yiu meassure back pressure? There must be a pressure transducer if some sort? Where does it sit? Is it part of the wideband?

[@richardholdener1727]

We use the pressure sensor in the dyno-we run a steel fitting in the Y pipe, run a flare fitting to a length of aluminum tubing (copper also works), that tubing runs to rubber tubing then to the sensor

[@mccromags]

Interesting video, Put twin gt45’s on the 454 and see what happens. Probably a broken 454. Still would be cool to see it run with better boost to back pressure ratio

[@shannonsisk]

Would be neat to see the boost vs backpressure on a LS 408 with the same combo. LS has much more efficient VE so it would be cool to see.

[@richardholdener1727]

it would be high on that powerful combo

[@shannonsisk]

Richard Holdener I wonder if it would be less than the 454 at the same 700 hp. 408 would make more power NA I think, but it is more efficient than the 454. So would it have less back pressure than the 454 even though it makes more power before the turbo? Is back pressure more of a cubic inch thing or efficiency thing? Would be neat to see.

[@williamanderson4706]

Great video. I'm building a gen VI 454 with a small Whipple charger great information on your videos. What is the right turbo for a big block Chevy to make 800, 1000, 1200hp. I have been doing a ton of research also on fuel injection which one will be best for NA and cost and what would be best for forced induction and maybe some price ranges and what to expect. I'd appreciate any of videos on this type of stuff thanks.

[@williamanderson4706]

@@dj4monie Im just switching over from NA with a carburetor. I got this whipple kit for $1500 that was specific for a 97 2500 GMC but technology has come a long way in 12 years. Im looking at switching over to turbos now that im learning more I have been saving for this build but want to get it so it stays together but not break the bank either. The engine is coming out of the machine shop with forged internals friday. Edelbrock Pro Flo 4 just updated to take forced induction and you can set up your injectors according to what you're looking to make for $2K it comes with intake distributor throttle body injectors wiring computer Etc with a good tech support behind it. I learn fast and am very capable but just trying to learn and be a part of something to get real information on what works and not people's opinions.

[@Bergermanifesto]

I'd love to see the same turbo with a larger A/R Turbine housing on that 454

[@sseibonnevilleman]

Now run 2 GT45s on both, that’s what I want to see!

[@71sc502]

Twin Nagasaki turn tables

[@backyardbuilttrucks1]

The cast bottom end wont live long in the 454. With twins and these gt45 ebays max out at 15lbs each.

[@sseibonnevilleman]

Backyard-Built-Trucks im more curious for back pressure info on both engines with twin old school turbskies.

[@mr.know_it_all]

Backyard-Built-Trucks I’ve ran 40psi with these turbos on a ls2 427 and low timing (13’) , 1400+ horsepower ..low 8s in a 3550 lb f-body, 26x8.5 slick, back in 2012

[@josephyslas4615]

I enjoy watching your videos and it allows me to think about a few things. I personally don't believe any domestic v8 should use a t6 housing at the very least for a single and t4s for twins. I'd like to see you run this test again against the t6 hotside (whichever ar you choose) to show the difference in back pressures at the same boost levels.

[@richardholdener1727]

I'm not aware of a T6 hot side of the DNA GT-45 turbo-but I did do a T4 vs T6 hot side test on an S480-very little difference at the 940-hp level

[@josephyslas4615]

Do you have a link to that one? I'd like to watch it 😊

[@LEOhopeful]

Richard...how about some thorough "junkyard/hot rod" turbo tests? Cummins Holset 6.0/6.4/6.7 Powerstroke turbos etc Most everything out there is anecdotal, at best. As compared to your thorough testing/breakdowns. Something regarding spool up/rpm range etc on those big diesel snails

[@richardholdener1727]

I would like to run those-I just haven't found many in our yards

[@LEOhopeful]

VERBALLY mention it in a video...I'm sure some viewers would send you some back of the garage shelf decoration turbos to test, in exchange for a shoutout or a t-shirt

[@Turbochargedtwelve]

Needs a way bigger exhaust housing and/or turbine wheel for all the gas that big cube motor wants to flow of course then you start thinking about a bigger compressor too...

[@3800TURBO]

Shocking hotside turbo but cannot complain for the price.

[@philipmacduffie7612]

I think twin Taiwan wind whistles are necessary on the BBC. They are cheap after all.

[@LandonRoy-cv9rt]

Philip Mac Duffie “Taiwan wind whistles” HAHAHAHA I’m using that from now on

[@MississippiDan1]

Another AWESOME test!! I'm currently building projects with both so this fit the bill, perfectly! My question now is, what is the A/R on the exhaust housing and would a bigger A/R let the 454 breathe enough for 15psi? I'd be happy with that...

[@richardholdener1727]

it would only help a little-everything needs to be bigger

[@liammcinerney5565]

I'd like to see this test but with an s475 so you can put a big 1.32 T6 housing on it and then the smaller .90 T4 housing and see how that affects back pressure.

[@richardholdener1727]

I ran an S480 that dropped the boost/back pressure ratio from 2.62:1 with the GT-45 to 1.5:1

[@liammcinerney5565]

@@richardholdener1727 very interesting! Appreciate all the great videos and information you provide.

[@aftastosk6016]

Great video. I hope that you are going to do the same with smaller engines....

[@ericflower9855]

How about testing a 4.8 with a 78mm with different exhaust AR. sizes to show the affect on power

[@lukestrasser]

A pair of those eBay turbos on the 454 have the potential to be really good... They made good power on the 4.8 and half of a 454 is a 3.7 so it may work out alright. Perhaps a pair of them could support 1000 HP on a BBC. That would be fun! Thanks Richard!

[@littleherms3285]

Oh hell....1300 would be easy on those GT45s. The fuel system would need a major upgrade.

[@steve6992]

Exactly what eBay turbos are these your speaking of, there are different turbo specs, which ones did you use

[@Go4BrokeOffroad]

Love your videos, tired of the same Chevy engine. Show us a boosted bbf please!

[@Go4BrokeOffroad]

I checked it out. Nothing about boosted big block 460,514,557 stuff. Good small block tech.

[@emerton01]

how about a series of videos to help us figure out which turbo (size) would be best for the 4.8 or 5.3 or 6.0 stock bottom end with a 800hp target? Starting to rethink my 6.0 build..lol thx

[@monsterram6617]

That's way above this guy's pay grade.

[@emerton01]

@@monsterram6617 you really think so? He's always asking for ideas so I thought, I might as well add a few...

[@monsterram6617]

@@emerton01 Don't get me wrong, I like the idea. I just don't think he's the type to get into the weeds on the math. He seems more like a "bolt stuff on and see what happens" guy.

[@richardholdener1727]

you need to do a little research-maybe look at 1 of the 10 books he wrote

[@monsterram6617]

@@richardholdener1727 What books who wrote?

[@joesilvasr9733]

What would the results look like if you ran a twin turbo set up on the 4.8? My guess is that even two of these eBay turbos can't efficiently make efficient boost on that 454. I love your videos I am learning!

[@richardholdener1727]

two should allow over 1200 hp

[@joesilvasr9733]

@@richardholdener1727 sorry Richard I wasn't specific enough about my question. Would two ebay turbos run in parallel on the 4.8 shrink the boost to drive pressure ratio? Theoretically you are halving the work load of each turbo in that application, correct?

[@brianmeyer5535]

Richard Holdner I'd love to see a stock 5.3 on 93 vs 93/meth vs e85 vs Alcohol

[@nathanlodder1006]

Love this turbo tech!! What was the housing a/r, inducer/exducer size on the gt45? Could you maybe explain Garrett's turbine flow maps in one of your videos?

[@richardholdener1727]

turbo map basics would be good video content

[@randystingray6544]

@@richardholdener1727 I would like to see turbo map basics and how to read a compressor map.