Welding on a Wastegate + Fabricating a Custom Turbo Downpipe | LS Swap S10 Update

This time on SPPTV Rob continues work on his Chevrolet S10 5.3 LS V8 Swap project! The hotside is finished by mounting the wastegate, and a custom turbo downpipe is fabricated from scratch!
A wastegate is the part of the turbo system that releases pressure from the hotside before the turbine of the turbo. It controls boost levels like this by limiting the amount of pressure escaping before the turbocharger with a number of springs and a valve. A Blow of valve works the same for the cold side of the turbo setup.
S10's are definitely tight to work on. Building a turbo exhaust down pipe to fit is not so simple. Rob makes it look easy as always and ends up building a nice piece to direct exhaust under the truck!
This Project will continue to be worked on, so subscribe now and tune in for constant updates!
Thanks for watching!
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[@boostman20]

Got lots time to do it right change the T to a Y I agree with Clayton

[@MrLangleylad]

Nice work Rob , don't be afraid to section a small piece of the floor for clearance . That's no big deal , when it comes too working on the vehicle and the elimination of any chance of rattles you'll be glad you did .

[@gunnywill20]

Love the old school music!

[@trapspotcustoms627]

I love robs willingness to cut shit lol real fabricator right there! Keep up the great progress trucks coming out bad ass!!

[@zackthomas2982]

It's not going to hurt anything the turbo is going to hold back the exhaust anyway to build up pressure to spool the turbo .your doing good man love the show.

[@El_Chompo]

That is some *tight* fitment on that exhaust dump. Very nice work.

[@TheCrewChief374]

It looks fine the way it is, and from what I have seen, it should work perfectly well just as it is! Furthermore, it is your project, and if you feel comfortable with it working correctly as it is, I would leave it alone, if it is my project!

[@HunterTuned]

I had boost creep issues with previous setups I bought from On3 that only vented one side of the motor. My mustang has one 44mm gate on the main pipe going into the turbo after the merge and has no isses

[@jnjcustomzz3]

SEND IT!!! my fence post hot side has been fine at 20psi for 10 months strong with no cracks and done with a H.F 110 mig.

[@Dannymclovin]

Did you really make a hot side out of fence post lmao that's awesome

[@hpno-nightmare]

I was 300th like!! Lol i think that exhaust merge will be fine, i do agree with clayton but its already welded up so its no big deal

[@jamesruther2879]

Hey Rob. Nice work, but mering both sides at the turbo fange does make a considerable difference. Also your waste pipe should be just below the turbo flange welded in so that the flow of exhaust can easily escape. However, for a street car just looking to burn a little or so, your set up will probably work just fine. Anyhow. I enjoy watching ya'lls videos! 👍

[@HeadFlowInc]

You’ll need defrost for driving on the street even in the rain. I vote make the heat work. On the intersection of the Hot pipe, I’m not sure how it will work “T” into each other? It could be a flow restriction?

[@mrhanay590]

Just Send It!! looks great ..

[@1989GTADRIVER]

Great Work BoyZ!!!! Just wanted to tell ya about WTE (Winnipeg Truck Exhaust) on the corner of Panet and Marion. They do big rigs but can provide you with any size mandrel bends you want they have a bender. I've bought a bunch of stuff from them to do my own custom exhaust

[@novaracer2000]

1989GTADRIVER ya ive bought stuff from them before.

[@xozindustries7451]

Good idea to put a band on the exhaust before the 90 so u can get it out, probably should put a flexible stainless mesh coupling there too to eliminate vibration and expansion

[@tonyescobar8858]

It looks good! Send it

[@braddavies79]

if you wanted to add a "taco" or a "saddle" to that hot side joint you could. just open the corner way up, with out totally cutting up what you have already done.

[@novaracer2000]

Brad Davies ya i was thinking about that

[@DocLulzson]

Inspiring my friend!!.. keep the vids coming

[@xozindustries7451]

I agree with Clayton, but try it out and see what happens. If you do change it I'd run both onto a merge then put the waste gate at the merge, because currently you only have half the exhaust waste gated,

[@jamesbadham3872]

as your bud said. "y" the pipe rather than "T" it and itll help spool, will help prevent excessive exhaust manifold pressure spikes that lead to uneven bank running and sometimes knock. Also, put your wastegate as close to the turbo inlet flange as possible, after the 2-1 merge. itll help prevent boost creep, and give proper boost control

[@justinbailey3902]

It'll be fine yes it could be better.. but it will work fine the way it is

[@lsxs10e90]

Honestly, clayton has a very valid point, but it will work just fine

[@inthemud14]

It's like an intersection, a t creates one flow to slow, if it merges like a y, everyone is happy. It'll still work, but I'd think you have some problems getting the tune spot on.

[@Dannymclovin]

I hear everyone say oh the wastegate has to go after the murge but in keeping tradition of hot rodding and if it works it works does it really no matter on wastegate placement? Also the exhaust will travel to the point if least resistance witch would be the turbo

[@tyco5176]

in my thought on the crossover on the hot side in theory yes if it we're angled more towards the turbo it would have a faster more effect on air flow, think of it as a wall air hits it dead on it would stop it until its forced out some other direction. no matter what their will be airflow

[@silhouette999]

Bro is that chief kief in the background 😂🤣

[@SPPTVarmy]

Probably

[@davidcarroll8533]

I can see where changing it will make it flow better... But is the difference worth the time and money?

[@1manikmeah]

got some good work and good music, lol

[@Knelsen6.7]

Getting it ready for LS fest.

[@RussZHC]

Brave to ask KZbin opinions, the speed at which you work, guessing its already done. I'd go up from where you have the wastegate cut in so that the bottom of the tube would be where the top currently is now or higher which might also gain a fraction for that water pump hose (not sure how it is molded).

[@WestcoastWrenchin]

Great channel!

[@MrJarrell76]

Yelawolf is the shit!!!! Great music selection fella’s

[@redlinepaul410]

You can use truck stainless steel flex pipe save a lot time. Works great on the big rig trucks.

[@joemeshefski5513]

That exhaust is very tight. Have you thought about the torq of the engine ???? It may smash it just a thought

[@johnsmith-qz4bv]

I WOULD JUST RUN THE HOT SIDE THE WAY YOU HAVE IT NOW...LOOKS GREAT...GREAT JOB ROB...

[@bryanroupe8646]

I wonder if he ever changed it or if it worked out. I would think there is a good possibility of boost creep because of the wg placement and said hotside orientation.

[@SPPTVarmy]

I did in a video after this one and it works great

[@ernestocuevas5128]

Hey I been sitting on this Howard’s racing cam the part number is 190245-12 maybe see about running that it didn’t break the bank just wondering if it would be good for a turbo application

[@christopher3067]

to make it easier if you do decide to change it, you could maybe cut a triangle piece of tube and just cut out the now existing 90 degree angle. and weld in your triangle piece to make it a 45 degree on the turbo side of the driver exhaust tube. If that makes sense.

[@amberzeller1172]

That turbo outside is fine you might have a tad bit more backpressure but my hotside is worse and it does fine bud

[@joelcr250]

*If it were my truck Id redo the hot side so the 2 pipes merge smoothly into the turbo flange on nice angles,........ that one exhaust pipe is heading straight into a dead-end BAM !*

[@davidcarroll8533]

Oh Nice weldo my skills😁

[@TheTurbooneg]

I personally use Martin Smallwood owner of Smallwood Race Development for my cam selection and he doesnt charge anything to spec it which is cool. Anyway, Imo the shithorse would really benefit from a proper cam. Good job getting shit done Rob!

[@8wireracing694]

I was less concerned with flow and more worrying about restriction when i done mine...what i mean is you have both banks forced into one 2.5" pipe before the turbo if that makes sense...so 4cylinders run thru one 2.5" pipe and the other 4 run thru one 2.5" pipe then all of a sudden 8cylinder into one 2.5" pipe...kind of like constipation?

[@drbiz495]

With the way the exhaust pulses back and forth as it moves through the system it may or may not be better. Hell it could quite possibly be worse going with Clayton’s recommendation. Pretty sure the factory manifolds and altering the length of the Y-pipe/crossover threw the efficiency part out the window. Who knows just my 22 cents. Keep the change

[@chile_the2jz618]

I’m the 600 like 🤙🏻😆

[@justin_parks]

Block the firewall off and buy a hotrod heater to go under the dash. Or with your metal skills build 1, heater core and a fan are all you need. Really cleans up the firewall also

[@meat270]

You want the best flow you can get with a turbo is what I have always been told. not about building more horsepower but being more efficient. everything needs to flow as smooth as possible to just make everything correctly with the least resistance to free up horsepower

[@way2highgarage983]

Change it! Don't cut it apart, just use the inside of a 90° bend to help upsweep it to the turbo. And maybe use the hole saw or whatever ya got to make a hole. I noticed that too in the last video, i agree with Clayton. Or just cut it up and use whatever bend to merge drivers hot side into flange

[@darrinscoilsclouds1498]

Yah it would be better if it goes with the flow more. But it will be fine like that

[@juliahobbick4604]

when you guys get to it could you make a video on switching the stock ecu to speed density and what needs to happen in hp tuners? love the videos btw ,you guys and sloppy are the $hiz

[@671chevelle671]

It would be better with a Y merge but it will work the way you have it, just wont build boost as fast or as well, the long side will be killing the velocity of the air from the short side. I think I would be more worried about not having a flex connection between the 2 hotsides, once they heat up they grow and move quite a bit, most likely will crack a right next to a welded connection.

[@ItsAdust]

LJMS Stage 2 Turbo cam, BTR Dual springs, whatever rod/piston combo you choose, and VSR 210s :) lets make some powa!

[@Flowtester1]

I know this is way off topic but I have a 2012 Chevy 3/4 ton. I had to put a new transmission in it’s the same thing that was in. I was wondering do I have to flash my pcm to new tranny it’s telling me it’s not reading it.

[@CapitalSpeedandSalvage]

Hot side will work just fine. the exhaust is going to be more hot from the manifold closer to exhaust ports.

[@tyco5176]

oh by the way the exhaust coming from the turbo make it go on the other side of the frame then back over the frame behind the lower control arm that part of frame before it droops to the body that droop is about 3in thatmight be easier

[@richardgreen1142]

It’s fine

[@boostednova7120]

Rob is a beast knocking this out fast

[@mattandres8455]

Sloppy Fairmont 1 or 2 had a similar hotside. It'll be fine.

[@slimelines4394]

Clayton is right i thought about that the day u built it it's probably not gonna be the end of the world but it's not nearly as efficient like that gonna try to blow back towards the other side exhaust gases instead of flowing with each other there for slowing the exhaust gases and air down a bit

[@twiztid1fiddy]

Ayeee whats goin on in here!!

[@bigballstouchem1560]

the merge will be ok but the wastegate is going to struggle. boost creep will b an issue cause basically the left side will struggle to get to it

[@calebhurteau4230]

Wats the best cam for having twin turbo. Sumthing with like 600 lift??

[@LeakBros]

The hot-side is already done, so just run it like it is. If it sucks, redo that final bend in to the turbo.

[@darinhenningsgard8833]

IMO your wastegate position is going to be more problematic than the bank 1 merge on the hot side. The way the wastegate is now it's really only going to dump bank 1 side and the bank 2 side is going to wanna go to the turbo.

[@El_Chompo]

The two headers merge before the turbo. It will be fine that way. Pressure follows the path of least resistance. An open hole through the wastegate will be way easier for it to flow to than spinning up a compressor wheel that is resisting it.

[@novaracer2000]

We put the wastegate on the shithorse in the same place and it worked fine

[@Hurtyourfeelingsagain]

is this the 60mm WG from speeddaddy? I'm looking to do the same setup with the On3 Performance 7875. Thanks.

[@SPPTVarmy]

No its a 44 from vsracing.

[@DocLulzson]

it will work

[@andrewbrown8872]

I would change it forsure

[@boostedKTM]

A 90 will work,I'll just put a 90 on there, 90 boot will fit😬... did you convince yourself.lol. looking sweet.

[@jetofoya6798]

Is changing plugs hard to change later.

[@SPPTVarmy]

Not bad at all

[@jonpetten8887]

I think it would work better but would be fine the way it is. I would be more concerned with you may get some boost creep from only having the wast gate on one side. Now in saying that it may work fine.

[@greggreen1280]

Fuck it tell him to built his own .👍🏻🔄👏🏻😎

[@armdrop1oh177]

will be fine .

[@whataboutbob9326]

all the buttons :P

[@El_Chompo]

With turbo applications ideal gas flow matters less and less. It all just gets forced where it needs to go. Sloppy switched on those super nice ported billet heads from the stockers and only picked up 40 hp from 600 which is a 6% power increase for a significantly better flowing head. Turbos just don't care they just cram the air in. On the hot side the pressure will just force it to go the right way too. I think if you changed that bend maybe you would get 20hp difference maximum. Maybe ever so slightly faster spool time. I'm thinking realistically 5 to 10hp difference if you added that bend and a tiny fraction of a second turbo spool decrease. If it's easy to unbolt and work on that pipe setup off the car though then I would probably change it if it didn't take that much time personally just because I'm an idealist and I like to see 'problems' get fixed just to satisfy me more than to make more power or efficiency.

[@elarr8733]

This one time, at band clamp...

[@FIVEONE-CLEVELAND]

F@$k no!! don't change the manifold it may not be perfect but its done for now...... Move on get it running change later when your chasing better times (Excellent job with the channel and all the cars) Greetings from the Gold Coast Australia!

[@Rome3aaro]

I should merge more.. That thing going to red hot

[@Brad_James]

Very nice!!!

[@natewilfong316]

Yes it shouldn't be @ a 90 but it will work like that but should be on a 45 more efficient and more smother flow which should be less lag huh? Idk that's the way you'd think it should work Idk but I'm not a professional so

[@johntheobalt2303]

It would probably be better but but it will work for sure Hunter Tune’s mustang is like that and he went 10.00s “Fawkin Send It”

[@way2highgarage983]

And i think you guys should try to port the heads for the shit horse. Sloppy had great results

[@SPPTVarmy]

+way2high garage were they that great though? I guess 20 whp is good in high boost if we reach the limits of the gt45. Or would the limits be the same? 😳

[@sheldonvanek9791]

I would change it to where it flowed upward, and not back to yuour manifold. It wont be hard ,cut the pipe install a 90 degree pipe that is cut i0n half so it will flow better into your turbo.

[@hiddenman99]

The transition Looks good. But might flow better like your buddy said to do it. Screw him build it as you see fit.

[@gx7857]

hows good was that vs racing WG ?

[@SPPTVarmy]

Working great

[@gx7857]

wow still running huh was looking into buying one but read otherwise on some forums but going that way forsure now. thanks

[@wheeln24-79]

I'm no expert on this at all so I could be wrong but I would change where they connect. I saw that problem when seen it in the other video. I'd be really worried about having a lot of backpressure on the passenger side manifold the way you have it routed now. Having that pressure coming from two different angles facing each other just looks like it could be a problem. Plus you'll get better flow into the turbo merging it in closer to flange. I think it'll look a whole lot better too. It looks rushed the way it is now. I also would've put the waste gate closer to where they merge together. Doesn't seem right to have it working of the drivers side only. But like I said to begin with I'm not a expert so I could be wrong. Keep up the work guys! Your one of my favorite channels! Can't wait to see the shithorse powerplant come together!

[@gabrielrendon7479]

Lance Shank Im looking to do this to my 5.3 and going single turbo , but how exactly would i have to merge it ? ive seen people say to merge it like a Y how would that look exacrly

[@kckc449]

What about trying a ljms cam in the shit horse?

[@austindoud273]

Send it

[@kart4nos]

Yes i thini it should murge and you should put a bigger pipe for the wastegate and weld it under the collecter for the turbo you might run into some prob later with that wastegate setup

[@Santiago-cl8vt]

Rob I thing you need to do a Y o minimum 45°

[@Santiago-cl8vt]

You did a good jobe

[@codypowers3856]

What's your goal hp with it?

[@SPPTVarmy]

+cody powers 500rwhp would be nice

[@carlbenz3341]

the welds looks like hes using an argon co2 mix with the tig.... not so nice. but cool project!

[@novaracer2000]

Carl Benz nope straight argon, just not a pro dime stacker

[@carlbenz3341]

I once got the wrong bottle hooked up, took me more than an hour to figure out, i first thougt it was me having a bad day...huge fail. But there has to be something wrong, the welds are so black. Is that piping zink plated? Either there is not enough shielding gas, or something is disturbing the shielding.(burning zink or other residue, air get's mixed in...) A man with your fabricating skills should do better at tiggin. ;)

[@davidcarroll8533]

Welding dang auto correct

[@waynep8007]

Aslong as it spins wheels in top gear it's all good...

[@ralphmenta249]

The amount of performance loss (if any) would only be single digit HP, and by the time you are at the wheels, there is most likely no difference. In my opinion, its more asthetics than anything

[@austindoud273]

Just put in some aftermarket pistons and gen 4 rods

[@justin_parks]

I think the hotside will be fine. Look at some of the hotsides sloppy has made, you'll be fine. You could add a taco there if it will help claytons feelings. My wastegate is on only 1 bank like yours and with a 3 lb spring i got 2.5 at the intake so its fine. Also mine is a 6.0 with a 7875. Send it bro!

[@evanwallace1744]

It will flow alot better if you fix it but it's fine

[@DocLulzson]

Where do you buy your v bands at?

[@SPPTVarmy]

+fake name summitracing.com

[@garylogan5460]

follow the heat, it mite get to hot there

[@KTKareen]

It’ll be fine but Clayton is kinda right it’ll flow .6% better if it had a slight bend but it’s no biggie

[@oggp5951]

Don"t think merge will make a difference, it will still make enough power to break parts.