How To Teardown, Rebuild, & Dyno A Small Block Chevy Engine

On this episode of Engine Power, Pat and Mike teardown, rebuild, and dyno a small block 383 Chevy engine they call Project Re-Rev! During the teardown and rebuild, they end up adding around 60 HP from spare parts!
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[@Rumble625]

If you’re not daddy warbucks, it’s best to keep your engine build sane guys, especially if it’s your only ride. If buying the hot rod and building a monster engine to put in it don’t bankrupt you then car insurance and gas bills will. Trying to find obsolete parts and incompetent mechanics will also have you going nuts. Been there, done that, already.

[@smcic]

Explaining how the water was setup on the dyno was interesting.

[@LandonRoy-cv9rt]

If you ran city water from a tap and out a drain as apposed to recycling the dyno water like that the shops overhead goes way up, dyno session price goes up for customer etc... But some shops do have city water plumbed into the system for certain overheating/heat soak situation pump city water threw because it's MUCH colder temp than the tank water

[@TheFoxygrandpa69]

Seeing Pat with the beard was a trip

[@noonenowhere4967]

I miss watching this show with my dad back in the day

[@Onewheelordeal]

My Dad even does Pats excited hand rubbing thing lol

[@utahcountypicazospage5412]

This shop has engine and wheel dyno I would like to see how much is lost from engine to wheels on most the engines they build because a 480 hp engine dyno will put down 375 hp to the wheels or so depending on transmission/rear end size 442 hp = 337hp ?

[@edwardmyers1746]

"It's got variable cam timing" 😂😂

[@steveknight9461]

Pat is the man I would give about anything to build a motor with him and learn just a little as much as he does you have my respect.

[@Onewheelordeal]

I love Pats excited hands around 14:00 I think. My Dad always does that when he's amped up about something

[@ScrewHeadJuNgle]

Pause @ 14:10. That's the look when you thought it could make 500+ and it didn't. lmao

[@Mike-xt2ot]

I thought the same. Either the dyno is conservative with output or that is extremely disappointing with that much money in parts. I think they threw wayy too much cam at it for the compression. Basically with the overlap about 7 to 1 is the result. Probably would have welcomed a supercharger with less ignition timing

[@bigsean2473]

@@bigboreracing356 i like and understand the video also, but that cam is way bigger than needed to make 500hp on it. ive seen and done it with less cam they have on her too

[@bigsean2473]

@@bigboreracing356 nah it wont just depends on the heads your running and rpm. that cam is plenty big for 500hp hell it had 260 duration if you cant get 500hp with that something else is wrong. the heads they have on this set up are not that good. E street heads. need RPM at least victor jr would of made it easy

[@racerd3801]

@@bigboreracing356 It is basically the same camshaft because they changed from a Hyd to a solid , the only change would have been in the valve lift

[@jradish]

@@bigboreracing356 shut up stupid

[@ToxicMisfitsYt]

Afr 195 comp ports would bring it alive

[@anthonycadiou8367]

There is something different about that motor. Mabe the carb or the timing. It should have been over 500 hp.

[@KingJT80]

Stingy dyno

[@Turte_Performance_Balancing]

I love how you clean the Motor from the oil in the Driveway...just give the oil back to the nature...

[@notmyname731]

You would shit yourself if you saw what actually happens in the industrial world.

[@hellion1770]

Came from the earth goes back to it.

[@basscube5]

Again... Where's the power? Why the hell would you run a solid roller cam and only turn 6500? What a waste of parts and time. Sad guys. Might as well just put a set of double pumper heads on it with an RV cam and use and Edelbrock double humper carb.

[@punman5392]

The comments for every single one of these videos are half people nostalgic about this show and the other half complaining about the stuff they do in the videos.

[@indyrock8148]

I'm thinking it's really a 350 based on those numbers

[@michaelluchesi6296]

If you would have done a little work on the heads your horsepower would have gone even more, remember the bottom end (block) is torque the top end (heads) is horsepower performance, when trying to beef up an engine take time to do a quick port and polish job (just take advice from Joe Mondello's tips on the heads for performance). Good video guys.

[@bjr2379]

So, it was a cam swap and thinner head gaskets?! I thought they would at least port match the heads...

[@brettlyde6338]

So you added timing and the carb spacer too bad you didn't do that on the before test

[@mattvorhees6055]

Probably could have took 37 degrees at 10 to 1

[@mrmidnight32]

Brett Lyde it’s a product supported video. It’s meant to make people buy these go fast parts lol It’s a commercial

[@brettlyde6338]

Yes I realize that it's one big commercial with commercial breaks

[@OutlawMercenary]

yeah, horrible plan, totally skews the baseline.....

[@socleanmx6]

I think the issue here is the E street heads some afr heads or trick flows and it would have cleared 500 day.

[@KingJT80]

These are dart 215 heads not e street

[@andrewpaul7441]

I must be brain dead. My math says the engine peaked at over 440 horses and started dying before 5900 rpm due to old weak valve springs. Just a set of springs would have gotten the tests really close and been a lot more interesting and made a lot more $cents$. No way is 80 hp pulled out of thin air. Not even the 40hp you really gained if you looked at the graph @ 5900.

[@dumbass3770]

The sarcasm runs deep in the comments

[@shaneshane1379]

That should make 500 at least. You didn't gain what you think due to the other combo only having 33 deg timing. Any 21 deg head small block Chevy want 35 to 38 degrees .

[@KingJT80]

the heads raelly cant flow it to do500. i put them into a calculator online from Wallace racing HP based on head flow @ 28 wanna know what it got for 383 inches? 487...crazy, right?! they need an AFR 195 eliminator street heads MINIMUM or a head that flows 270-280 CFM @.500 lift to do 500+HP

[@kenray6008]

33 degrees of timing is crazy,hell 36 degrees would've got closer to that 480 hp

[@nathanwood1567]

To big of a cam, not enough compression. I would want compression with heads and cam like that around 11:5:1. With aluminum heads and as big a cam as you guys have you should bleed off enough cylinder pressure to run pump gas even at 11:5:1. For a solid roller 383 this motor isn’t very stout

[@KingJT80]

They didn't spin it past 6800 They said they werent trying to set the world on fire or else they would have made 500

[@nathanwood1567]

mrhazel spinning it past 6800 wouldn’t matter as much if they had more compression there would be more power all over the place with those heads and especially up top

[@KingJT80]

@@nathanwood1567 11.5 to 1 would not have matter either. Maybe it would have made ALMOST 500 but your not gonna get that much more power with another point in compression over the compression it has now And if you have a solid roller that doesn't spin past 7000 there really isn't a point of having one. A hydro roller will do that

[@mattvorhees6055]

It was probably more streetable the first setup. Thinner head gaskets and timing chain was all it need. I bet that new cam surges bad under 2500.

[@mrmidnight32]

matt vorhees it’s a commercial for summit and other brands. It’s literally filmed to make people go out n buy go fast parts for their 350

[@rudde67ssm62]

3500 stall fixes that lol...

[@lxwvandenberg]

Didnt you hear it on the dyno??

[@rodpalm6398]

@@rudde67ssm62 3500 stall 'sucks' to drive on the street.

[@rudde67ssm62]

@@rodpalm6398 no it doesnt...smh. quite the opposite

[@aussiesupersnake6642]

AFTER watching the ford 347 build,this thing is a joke,just took my 408 chi headed street driven cleveland off the superflow 902 dyno a couple of weeks ago,wasnt quite 700 hp,engine builder says next size cam would have been well over 700,all on the same 93 as in the us

[@seanjmichel]

I was taught to pick a cam based off of flow numbers on your heads.

[@strictlybusiness1598]

They only switched up the cam/lifters and some valvetrain parts that were messed up and reused everything else and picked up a ton of power upstairs. Looks like if they turned it higher would have made very close to 500 hp on an old set of Dart Pro 1's on pump gas. Not bad!

[@ranchhandrandy3213]

Was watching this with captions on. On the dyno pull the caption said "music".

[@giordanobruno1333]

A year later, in 2020, the beard moves from one face to the other. Crazy 2020.

[@traejemison9563]

That show u just cause ur famous don’t mean u no more that the next iron vortec heads 383/385/388make450/475depends on wat can we use

[@arfreak1979]

485hp with dart heads and a huge solid roller? Pfffff

[@iomero3849]

x2

[@rodpalm6398]

I agree, that is pathetic. I've seen much higher numbers with dual plane less cam 'hydraulic roller' and smaller heads.

[@Shade_tree_garage01]

I’ve seen 550 from a engine with a performer RPM dual plane lol

[@dontbusttheplace8151]

I’ve seen 4000 hp from a straight six with just head and cams .... not impressed

[@kevinroberts8441]

funny

[@gothicpagan.666]

The second engine made more power but looking at the graph it had to be held above 5250 rpm to move up the road faster than the first. Great video and well explained

[@johnmilner7603]

Keep the videos coming guys cause we no longer get Power Nation here in Ontario Canada.

[@bigsean2473]

kzbin.info?q=https%3A%2F%2Fwww.PowerNationTV.com&v=kZPdbEZkW1g&redir_token=VPZtBYB1ZLg_EbyCF40cMWwbIWV8MTU2MjExNDM4MUAxNTYyMDI3OTgx&event=video_description

[@demarques1911]

Thats a xr294.. i have a smaller cam than the solid roller they put in and im closer to 550hp. This engine needs to be reconfigured BIG TIME

[@biggregsparks8364]

I agree, but the max flow of the pro 1 215's is only 274 cfm. Some afr 210's would seriously wake it up.

[@rudde67ssm62]

Yea, those heads out the box are prolly holding it back, bigtime Some port work or btter ported heads would put it over 500 easy.

[@72troy455]

@@biggregsparks8364 274cfm should support 550+HP.

[@biggregsparks8364]

@@72troy455 with the whole combo well thought out. My ported gen 2 lt1 stock castings flow 284 at .650 lift.

[@dirtfan05]

@STREET RACER go home you’re drunk. No one gives a shit about your third gen hamies.

[@Scubasteve22]

That's weak sauce. Should be well over 500 hp. There was nothing wrong with the first cam. Think it was sized about right. Not sure why, but dart stuff never seems to make the power you would expect.

[@KingJT80]

They're not spinning it that hard

[@monkeyCmonkeyDoo]

Go figure, a SBC with a "small oil leak in the car".

[@18JamesBlond]

Pat has got to grow that beard out again. Looks epic

[@cbobscountrybunker2312]

That 383 will make a sweet school bus or grain truck motor.

[@countryboy2818]

Step 1 throw in trash ang build a sbf

[@ezcondition]

you guys made the 383 look like a chump. AFR 190's, a comp XR-288, and good engine skills gets ya 500/500.

[@davidmiller4594]

Lol Who else noticed that even when driving, Pat still keeps his pens with him. 😎

[@jeremymatthews5169]

got a part number for that pneumatic valve spring compressor tool yall are using?

[@paulgonzalez7852]

www.summitracing.com/parts/pro-66849?seid=srese1&gclid=CjwKCAjw36DpBRAYEiwAmVVDMBqTjIq4bH3ad3Uat-oihZlLP_k97v8xzDL8xQIayv1o5_y3B301yxoCKY8QAvD_BwE

[@BigMAC-dr8cz]

Am i the only one who noticed moroso on the valves and they still say make in unknown

[@davidhusband5022]

so little power from such a huge motor. im from rotary world, tiny little 1.3 litre mazda rotaries here in Australia push out over 1000 hp, such a shock for me to see a massive engine make less than 500 hp. my mind is blown!

[@a4000t]

rotary engines dont make 1000hp without a dose of nitrous or turbo/super charging. are you comparing naturally aspirated to naturally aspirated? what are stock rotaries? 250~ hp? the difference is the chevy actually makes torque.You could turbocharge a smallblock chevy to 2500hp. also,dont go by this channel for serious chevy horsepower lol. they didnt optomise anything.

[@davidhusband5022]

@@a4000t yeah i know rotas need turbos, just like the worlds fastest v8s need blowers. it still just blows my mind how big v8s are and how many moving parts they need. here in aus even 6 cylinders and 4 cylinders pump out huge power. with 6s running 5 second passes now, rotas knocking on the door of fives, one second behind the worlds fastest top fuelers, i am suprised people even bother with 8s anymore. i know people like what they like, i just cant get over how massive these v8s are and how much space they take up, then they are placed in heavy vehicles! it just goes against motorsport principles, power to weight etc. but thats just me!

[@a4000t]

@@davidhusband5022 The v8's are big to make up for lack of turbo charging etc LOL. The amount of moving parts in a piston engine is friction. Realize you can build a typical 632 chevy,with a simple carb,street compression and no turbos etc and it will make a 1000+hp and at least 800ft lbs of torque.Small blocks do 650HP pretty easy too and treated right they last forever. its relatively simple to do.again no naturally aspirated 4's,rotaries,etc can do this,its cost effective for the backyard mechanic.Time marches on and these dinosaurs show their age but there is still no mistaking the sound of a good v8. You can do anything u like to a rotary and they sound horrible,hurt the fillings in my teeth when they wind up. Of course sound is subjective and some think they sound good..go figure :) put one of these rotaries in a heavy vehicle and see how it goes, since they make little torque,there is a reason they are always in 1500lb coke can cars.

[@Terryray123]

Actually its equal to a 2.6 piston engine cause of two chambers with a charge at once.

[@2015_Rubicnn]

What a dumb comment....you are comparing to completely different engines. Rotary engines are a piece of junk that you need to spin at high RPM to make any power, plus adding a turbo. See how long that rotary lasts compared to this V8 that doesn't need to spin that high to make decent torque, and HP. By the way, this engine is not huge, it's merely a stroked 350 chevy....

[@dstrong11]

Needs a 850 double pumper with that solid roller cam in my opinion. You'd hit over 500Hp if you did 👍😉

[@KingJT80]

An 850 wouldn't have got that much more It's probably in the valvtrain or ignition. They only had 33 degrees I would have thought 36

[@K.B.E.B]

Man, how do I get this Job. living the dream my good sir. 👍👌

[@eadelfin]

They never followed up on what they replaced the bronze distributor gear to. Remember they showed the worn sharp edges at 5:03

[@nashvilleoutlaw]

Um.. probably just another bronze distributor gear lol everything they name by brand is most likely a sponsor

[@mrmidnight32]

Royal purple 😂😂

[@robertfairburn9979]

Why do American like these old engine designs. A pushrod carburettor V8 is very old school. Don’t get me wrong I like Americans and I enjoy myself when I visit your fair land. In New Zealand there a few V8 fans but nothing like America where it’s like a religion. Is it due environmental protection control that requires a big block. Or is it due to American gas being lower octane. I’m not suggesting in any way what people should drive smaller engine cars. If you want a bigger engines it’s a free world

[@72troy455]

Those are pitiful numbers for the parts used in that 383ci engine. It should be over 525-550hp as equipped. There's another 50-75hp in there somewhere. NHRA legal "stock" 255hp 350s produce 450+hp with production heads and intake & Q-jet.

[@biggregsparks8364]

The dart 215 heads suck. My hand ported gen 2 lt1 heads flow over 10 cfm more.

[@larrybennett2342]

@@biggregsparks8364 I agree, some better flowin heads would make a huge difference.

[@biggregsparks8364]

bennettBennett alot of people build 383 strokers, then put whatever aftermarket head they can afford without knowing the lift flow numbers. Not all 383 strokers are the same. Stock headed 383's are around 325-375 flywheel, all the way to over 700 horse for a drag race only setup.

[@72troy455]

@@biggregsparks8364 I see dirttrack 383s with modified vortec heads making 530-540hp. 350s over 510hp with ported vortec heads. Seen a 357ci drag engine with ported 215 iron eagles make 580+hp with a solid flattappet cam. 13.5-1 compression.

[@biggregsparks8364]

@@72troy455 to make over 600 n/a takes a 320 cfm cylinder head with 7000 rpm cam

[@TimmyTechTV]

You should add filmed date to the description.

[@kenray6008]

Wtf im I the o lu who thinks those are horrible numbers, that should of made 480 before the cam change, there making those dart heads look real bad

[@biggregsparks8364]

They are the non cnc 274 cfm heads.

[@kenray6008]

@@biggregsparks8364 274 cfm should be enough to get it done ,something was going on there

[@biggregsparks8364]

@@kenray6008 my gen 2 lt1 factory castings ported out to 284 cfm at .650 lift, and has less port cc. The non cnc dart 23 degree heads aren't that great. My calculator says it would take roughly 308 cfm of head to get it to 550 horses.

[@kenray6008]

@@biggregsparks8364 you know that motor should be done more on each dyno pull than what they claim

[@biggregsparks8364]

@@kenray6008 maybe, but is losing about 8 percent of power from 10 to 1 compression and small .540 lift cam and crappy heads. Change them 3, then over 500 horsepower no problem.

[@backyardbuilttrucks1]

Why is everyone hung up on light weight 5w30 , maybe listen to a machinist stop with hydraulic oil in engines. Alot of money to only make 450 hp.

[@dannyoutlaw8001]

It's best to check piston to valve clearance without a head gasket and zero lash .... that gives you exact clearance

[@OutlawMercenary]

if that ''old'' stud girdle is so outdated, just mail that shit to me....

[@garycarr6584]

dumb question.. i built a nasty little 355. i ran a hyd roller cam 236 242. 536 542 lift.. i added 8 Crower 1.5 ratio rockers and 8 1.65 ratio rockers.. pushed up my cam lift with out hurting my lower rpm tourque number.. engine was about 10,1.. made around 500 hp on the dyno.. can we see more split rocker ratio trials,,?

[@anthonykimber4464]

those blue rockers look like the proforms

[@dheujsnrhfydhehehshshhdggsd]

My least favorite show on PB. Just spending catalog money. Junkyard swap fro. X to Y always seems more interesting.

[@walterstanfield3662]

Its a great show for someone who has to much money and not enough sense or if host a tv show and get all them goodies for free lol

[@dheujsnrhfydhehehshshhdggsd]

@@walterstanfield3662 plenty of guys who have it to spend. Just think it's gotten too far into informercial for summit

[@mrincredible5492]

Bring back horse power!!

[@charlestorruella8591]

They did

[@mrincredible5492]

Yeah the re runs

[@jorgearmas142]

Hello... The 383 likes 108 lobe centers. In the other Hand can You listen the cam degree wheel part number please?

[@blakebusbee9531]

And now Mike has a beard , boy y'all Joshn Blake the snakies ??????

[@jeanvi52]

Blah

[@blakebusbee9531]

Y'all wouldn't believe what goes on in Texas ( wink ) LOL

[@blakebusbee9531]

What What .....What kindve valve springs ??? ( C R Y )

[@OutlawMercenary]

So....38 hp improvement. i'm disappointed. NEXT!

[@jhutch1470]

I would never build a 383 street engine with a single plane intake. That is engine build 101.

[@KingJT80]

Why not? A 215cc head will get chicked by a dual plane. The runners are too damn small and make no sense to port. A dual plane will flow about 220cfm those dart 215s flow like 280 290. Now if you want to put some 180cc heads on a 383 put a dual plane on it. It'll make a great van engine. In a Chevy II with low gears, single plane is fine Now THATS engine building 101

[@jhutch1470]

@@KingJT80 Here's the flow numbers from porting the RPM Air Gap intake from Abbott's Super Flow Port and Polish. EDL-7501 SBC Edlebrock Performer RPM Airgap (SBC) As Cast: 210 CFM Stage 1: 235 CFM Stage 2: 308 CFM Stage 3: 320 CFM I guess I didn't mention the porting part.

[@KingJT80]

@@jhutch1470 yeah ive seen his website before Heard he does good work That being said if a stage 1 port match or stage 2 plenum port cant do it just step.up to a different manifold Use a holley 300-25. Because A dart 215 flows quite a bit Remember the GMPP zz383 use 210 fastburns and a vortec single plane and that engine makes 450 This engine should be low 500s

[@jhutch1470]

@@KingJT80 True. I guess I was stuck on part throttle response. Pull a car off the trailer with a 4000 stall, then rip it down the track shifting around 7000 and you would want the single plane. My cars are 99 percent street so I would stick with the ported dual and a 1 inch spacer. I would love to see a dyno comparison. The dual would make more blow 3500 or 4000 but I'm sure the single would run away after that.

[@KingJT80]

@@jhutch1470 well yeah on a street car a dual plane is probably better And a vac secondary is also probably a better choice on the street But things can change if you have a lightweight car and low gears. You could probably get away with a single plane and a mech secondary in a lightweight hotrod or a foxbody for example

[@JohnnyRebKy]

It’s amazing how many shade tree mechanics consider a new set of rings as “ rebuilt” lol. Every old car truck on Craigslist has a “ rebuilt” engine. Unless I see all the invoices for the parts and machine work I go the other way.

[@richardrichard4394]

love the Nova reminds me of my Canso pro street sweet chevy11s

[@notsogreat123]

How much money did that 63 horsepower cost ????

[@3dsmackdown]

Holy crap, new school here comparing a vanos and 2JZ system to what you guys are working on. Waaay different in efficiency.

[@graffitifilmz4901]

Nobody is going to notice the difference in 40hp just being honest the time put in on it was worthless for hp u not going to notice

[@KingJT80]

Lolwut? Your ET will definately go down lol yea you will notice 40hp! 8 to 10? Probably not

[@Mike-xt2ot]

I wish i could dive into their dumpster. Thats where the missing horsepower is. A simple head and compression ratio change would have netted more than that.

[@Orygunner67]

Is this the only video where Pat is wearing a beard?

[@ditherdather]

"Using a set of calipers and NOT a wooden ruler". haha. That means somebody, somewhere tried that.

[@dw9997]

Best thing I’ve found for a Chevy engine is they make great hoop net anchors.

[@JohnDoe-ml8ru]

"a lot of mileage" on a brass dist. gear means about 10,000 or less. Never use a brass dist gear, or brass valve guides while were at it.

[@blakebusbee9531]

Oh Well Cylinder head gasket still looked great !

[@pabloarmendarizortega447]

god bless this channel

[@jeremyleverette6750]

Am I the only one who feels like it two different engines that were tore down... Oil pan different

[@biggregsparks8364]

They put a better plan for better oil scavenging at high rpm to make more power.

[@jeremyleverette6750]

@@biggregsparks8364 I know that. I'm saying when they Dyno the motor the first time it's got a black pan like the one they put on. When they test motor apart it has a basic pan an is orange

[@fanghicheck]

maybe a spread bore holley 800cfm carb ? get you over the 500HP ?

[@nickdouglass4833]

Tighter lobe separation would have been better

[@willkincaid5841]

Question is was that worn out bronze cam gear throwing your timing off?

[@Davejust451]

5:31 min, Those could be Proform rockers.

[@davidrowland2354]

Dont the timing marks both got to be at 12oclock to be at #1 tdc compression stroke??

[@killintimeracing1368]

KEYBOARD WARRIOR

[@rontownsend8235]

I going back to Alison Krauss videos, she better looking than you two besides I already know how rebuild a chevy.

[@dirtfan05]

Ron Townsend words are hard.

[@SgtJoeSmith]

@@bigboreracing356 bugatti says hold my beer....304mph

[@SgtJoeSmith]

@@bigboreracing356 just set it early August. Lasers detect road surface and adjust ride height of car for perfect height at that speed. There's couple videos on KZbin about it. Something about couldn't make it official cause for official speed records you have to turn around and drive opposite direction and hit speed again but test track only ever been driven on in 1 way so pavement wore in 1 direction and would've tore up tires trying to go opposite direction.

[@davidmiller4594]

Where are you getting your minimum valve to piston clearance?

[@204_mod_shop]

Look how much rtv or whatever they used to seal the intake back on . You notice how much gets pushed out and then they wipe off the rest ? Lol what do you think the inside of that motor now looks like ... The exact same as the outside lol ....

[@johnsmert3361]

Gotta let it set up a bit and tighten it in intervals I get almost zero squish when I do it this way

[@wesleycook6921]

That is a great running small block.

[@blakebusbee9531]

That beard looks great PAT ! YEEEEEEEEEEEEEE HAH

[@polishedturdspeedshop]

What am I missing here? 10.4 comp, huge cam, single plane, that should be well over 500 hp

[@KingJT80]

Stingy dyno Or There's a lot of liars out there lol

[@YoungerPrice]

I was expecting more from that big cam, maybe if it had a tighter lsa it would of more before the redline

[@CharlieBrown-pb9xn]

106 would have put it over 500 is a guess

[@CharlieBrown-pb9xn]

and a 900cfm carb would have helped too

[@jimwilson7403]

Get rid of that Dart intake, swap it with a Holley 300-25, 850 style venturi carb, cam with 106 lobe center and 102 intake centerline and a set of AFR 210's would wake up that engine alot. I bet before all of that work they could have just swapped intakes to an Air Gap RPM and it would have picked some torque and hp.

[@joshabrey6693]

@@bigboreracing356 you are literally an idiot... have fun in your delusional dream state tho fella

[@Scubasteve22]

I like how pat got so excited when it made 25 more hp.. By the way the new cam is only about 4-5 degrees bigger than the old one. Does have more lift though.

[@GJ-DT]

If it made peak power at 55 why did it have that big single?

[@donnieleeman8817]

How did they determine what was the minimum valve to piston clearance?

[@justinballard7242]

Safe limit is .120 on the exhaust and .060 on the intake.

[@Nmdixon-cu7vm]

Randy bobandy he asked how, not what.

[@Thumper68]

Should of done a port and polish 90 free hp lost

[@dirtfan05]

Whenever someone says “port and polish” i immediately know their skill level....little to none, the worst thing you can do to an intake tract is polish it. And 90hp out of a pump gas 383??? Come on man.

[@dirtfan05]

You’re watching too much engine masters....

[@Thumper68]

dirtfan05 whatever you want to believe lol. I may not be a master engine builder but my father has been for 45+ years as well as a master machinist. That said I know my way around a sbc. And a port and polish is not just an intake tract. Anytime you can flow more air the better that’s science bottoms line. Yeah on this 383 90 hp would be max possible gain but you have the engine apart like they did and your making a episode about making horsepower easy and cheap you definitely should be doing a port and polish. No reason not doing it ever when you putting a sbc together it cost you nothing but time for guaranteed hp and torque gains that are definitely worth it.

[@geerbangr]

Wtf is lb ft of torque?? Jagoff its ft lbs. 🙄

[@brucewilson1118]

Ok what happened to Mike????

[@roknroy1]

heads are too big, afr 195s would give you 500 hp

[@walterstanfield3662]

For real ive seen mildly built strokers make that kinda of power with gasket matched vortech heads for way less $$$$

[@1995Z71]

I was about to comment the same

[@1995Z71]

Look on the bright side after all the changes they finally made the number they thought they would originally if it was me I'd of just put 1.6 ratio rockers on it and called it a day

[@biggregsparks8364]

The comp port 195 heads flow over 300 cfm. Dart 215 flow 274 lol.

[@cooterbaby3360]

Thats what i was thinking, the dart 200s