Correct Wastegate Position, Placement, and Plumbing: Tech Tip Tuesday!

[@177SCmaro]

One way to run the wastegate pipe to merge with the downpipe is to do the merge further down the down pipe with an exhaust bellow. This helps with dispersing some of the heat and allows much more "give" in the pipes.

[@efaracing4000]

Great info! Love a person who mentions his mistakes to back up his knowledge a lesson learnt is a lesson to learn from

[@Bad_Idea_Mike]

Doing the waste-gate down pipes next weekend, great info and just in time! SBC 400, dual 66/73 VS Racing turbos, 44mm gates.

[@TangodownNZ]

Very good advice. Better than the other videos

[@genemounce8302]

VERY informative ! appreciate it Doug.

[@davek556]

Great info!! First time builder here 👍👍

[@kevinschneider7642]

Thank you I am installing a to larger aftermarket turbo on my car and a much do larger front inter cooler your video explained several questions I needed answered

[@bilteman_hukkaportti]

It’s good to run wastegate outlet as far down to exhaust as you can, for example 1 or 1,5meter long wastegate piping is good enough to allow that flex you want so things don’t crack so easy, in my former experience the stainless pipes was nice looking but more fragile to crack than normal steelpipes

[@jimhiscott2918]

95 honda EG civic. I have hood exit exhaust as well as the dump pipe. Works great! But I sure to get pulled over a lot lol.....love your build. You have some serious bank $ in your engine compartment. You spared no expense. Beautiful!

[@bman1107]

The audio is leaps and bounds better with the wireless mic! Thanks for the info!

[@JubeeHS13]

Great info, funny I found this cause I'm in the middle of doing a 240sx 2jz swap. So the manifold I'm running is all vband flanged with two 44/46 mm wastegates. I was looking at how I would route the dumps cause i dont it near anything that's going to melt over time.

[@MotionRaceworksOfficial]

Thanks for watching! Good luck with the build!

[@scottycollins131]

Every freaking time I watch this channel I have to change something in my build.

[@takuacheperformance4740]

Absolutely love all of your videos!

[@Broccolidiesel]

Great video. What size single wastegate for a 5.3 with a 7875. Probably 20 psi max.

[@MotionRaceworksOfficial]

A precision 46mm or Jgs 50mm would be perfect! Built this combo several times and always works perfect

[@TravisFabel]

You can put it from the wastegate into the downpipe and account for flex with solid tube. The trick is length and bends. If you add enough bends to allow it to flex, and enough distance that it isnt a huge temp diff compared to the downpipe, you can then merge it in nicely. Its when you either run too short of a shot (that straight 90 you showed) or you dont account for flex (No room to grow) that you have issues. By not running a straight shot, but having a couple bends in it first, you can give it room to expand at a separate rate and still fit. Your other options dont really work for street cars. you cant dump to "the same place as the downpipe" as that IS the rest of the exhaust. lol Also, if you want to overbrace one half of it so it cant move, the other half HAS to have enough flex to take all the expansion movement.

[@guerolil]

P

[@mopower9844]

What about mounting the wastegate directly to the turbine housing? Welding cast can be tricky but makes for great placement and packaging.

[@TheWretchedWorld]

Works fine

[@pro1342]

When would you want to run flex joints between the headers and the turbo? I am working on my first kit now and this was great info. Thank you.

[@boostjunkieMike]

Good informative video. Thanks for sharing 👌🏾😎

[@sebfullick5011]

good video! many don't think about the WG exit and its surroundings, I fell victim to this and melted my steering rack gaitors

[@jasonwillis-hi9ve]

i just spoke with percision two days ago they want be to run a 66mm waist gate with a 64mm blow off they said as far as the waist gate you can never go to big

[@DeathTollRacing]

man..... You just caused me to have to rework my project. Thanks a lot. 😆 Seriously though, excellent job.

[@brandontucker6069]

thanks for the tips man!

[@JoeyRozay]

I'm curious, where did you eventually run the pipe on the mustang? My kit came exactly as you described with the exit by the steering rack

[@MrLangleylad]

Awesome info , thanks Doug

[@jar895]

Great vid. What would you think of doing a vid on single vs twin or one on what it takes to convert from pump to e85 ?

[@Seumu990]

Great video! Thank you 🙏

[@samuelmdouglas]

Thought on oplumbing wastegate directly to exhaust housing?

[@H00K-KING]

What about welding wastegates on the turbo housings?

[@brandontucker6069]

any difference when working with a twin scroll? I've been given conflicting answers there. using a single or 2 wastgates? may sound dumb to you guys that know. but I'm curious for my own build

[@daveb1870]

Is there a compromise if you utilize the wastegate further downstream, say due to space requirements or another issue?

[@mauricio5763]

1997 2.5l Jeep Wrangler. 150.4ci 3.88” bore x 3.19” stroke 9.2:1 compression T04e t3/t4 turbo. .50ar compressor .63ar turbine Stock engine. Planning on running 5-7psi. Is the stock 38mm internal wastegate on a t04e turbo sufficient to bypass 7psi? I do not want to over boost. Or should I run an external 40mm, 44mm or 50mm wastegate?

[@leegrant2977]

this is a new built Ls 408 ci with single billet 88mm turbo twin 50mm bov and precision 66mm waste gate am i going in the right direction?

[@chipcurrey653]

Since Chris BIshir won LS Fest and Drag Week small block power adder back to back with an SBE 5.3........what is the point of building the big money forged LSX block 388 to run drag week small block power adder?

[@MotionRaceworksOfficial]

Who could know

[@jimhiscott2918]

Bubba. I love that dog! Boxers are awesome dogs 🐕

[@HeidiFegles]

How much difference. Maybe by itself not that noticeable unless your the tuner trying to control waste gate duty then in really matters and helps your tuner.

[@wendellgreenidge3362]

Awesome wastegate advice

[@HammerHeadGarage]

What size wastegate for a 5.0l single t4 turbo? I was thinking 38mm? It's on a low boost (6psi) blow through setup.

[@MotionRaceworksOfficial]

Because you want to run low boost you want to make sure it’s not undersized as it will not control boost well enough. I would run a 46mm and no smaller. That is a perfect size to control boost on that engine

[@HammerHeadGarage]

@@MotionRaceworksOfficial Thank you. I am new to boost :) 1984 ford ranger with a stout n/a 302.

[@3694-k5s]

That was interesting and great points to consider too. I have a question concerning the setups that you use (I know that they're all different). When setting up a wastegate are you also considering the pressure and velocity of both the exhaust and the wastegate? Having the wastegate enter back into the system too close to the exducer surely has an unwanted result in pressure bias in either direction. Any thoughts on this issue or do y'all just let the issue be part of the build?

[@MotionRaceworksOfficial]

I’m sure there is something too what you’re saying (and always thought that way too), but I have seen some record setting cars with it plumbed like that, so I don’t know that it is a performance loss as a whole

[@3694-k5s]

@@MotionRaceworksOfficial I will be doing some research on this in the next few months along with a few other variables as well. I'm willing to bet that there is more to it than what some might think. You know as well as I do that being able to find, understand and control the variables is how we increase power, efficiency and longevity in every aspect of engineering. I do respect your knowledge and appreciate your information which is exactly why I asked. I'd be glad to get back with you If you'd like to know what my research finds.

[@Thedealershipguy]

What you guys do with that black c5 z06 I sold you guys about two years ago

[@hiteracing1489]

What size gate would you recommend for 350ci Ls with 68mm on a single 3" merge?

[@MotionRaceworksOfficial]

A 45/46/50mm wastegate will be plenty

[@thetommantom]

Did you say 388cc when I search that it says 0.388 liters?

[@Autofaze]

Love it! Super informative!

[@mrbigg7255]

Great video

[@christopherfarr3993]

So can I run the down pipe out the finder

[@ryanboytim896]

Vibrant makes new Bellows that handle high high heat

[@lsxtmt4910]

Creating a bunch of turbulence right in front of your Turbo with a Y has never been a good idea definitely affects Turbo efficiency

[@supercharged6771]

Also a thought is dust and road crap being thrown all over while you're spooling

[@hectord4936]

Very helpful

[@835YT]

GREAT AND THANKS FOR THE VERY VALUABLE INFO COULD SAVE SOME ONES ASS !!!

[@ariansosa]

What happens if you put a titanium pipe on the waste gate

[@MotionRaceworksOfficial]

Shouldn't have any issues lots of people have done this!

[@chiefslief1886]

"Bubba" !. . . So sweet😂❤️💋

[@rarkitorparkit]

BEST WASTEGATE PLACEMENT CONFIGURATION FOR LAMINAR EXHAUST FLOW 1) SYMMETRICAL FEED Turbocharger and wastegate are feed from divergent Y section equally. 2) PRIORITY FEED Wastegate placed inline with direct flow path with the turbocharger flow divergent. 3) TURBINE HOUSING FEED Wastegate feed from a modified turbine housing just prior to volute beginning. ACCEPTABLE WASTEGATE PLACEMENT. 1) ANGLED Wastegate feed exiting at 5-45deg to exhaust flow using straight or radius pipework. PROBLEMATIC PLACEMENT 1) Wastegate divergent angles over 60 up to 90 degree. BAD PLACEMENT 1) OPPOSED FLOW Anywhere exhaust flow is expected to reverse direction 2) UNEQUAL FLOW Anywhere wastegate will not receive flow from all cylinders driving intended turbine. Eg, only the left bank on v8 single turbo. TONGUE YOUR EXHAUST Ever seen some NAME BRAND manifolds and there's a weird tongue shaped piece welded into the collector at the 'gate port? This is because of poor design. Often seen with 90 degree gate placenent. This placement of the wastegate results in poor wastegate flow and in turn boost spiking occurs. The band aid approach used by some manufacturers introduce a restrictive diverter plate that cause the drive gases to impinge upon it, encouraging exhaust flow towards the wastegate. Remember, once you have reached the boost target and the wastegate opens, the less restrictive the waste exhaust is the more power you will see You can even ditch the wastegate altogether in full drag race applications and control boost with a charge bleed set up.

[@mopower9844]

You will never have laminar fluid flow in an exhaust. Just less turbulent flow

[@TheRealMichaelP]

What if I run the wastegate off the downpipe?

[@GearheadRob]

Inner tie rod not ball joint damn it doug

[@kaizousha5531]

Just make the down pipe an up pipe if you catch my drift 😂😂

[@ariansosa]

So that’s his name BUBBA Nice:)

[@danielfmyers]

10:46 😂😂😂

[@MotionRaceworksOfficial]

Hahaha that’s real life at the shop

[@danielfmyers]

Motion Raceworks Official whether cars or guitars, the best shops have a Bubba 🙂

[@nicholasritchie2459]

"driving down the road" *intended for off road use only*

[@toweringhorse2054]

As a broke dude doing a 2JZ swap entirely off eBay parts she’s going to probably just dump straight down

[@robertgardner5907]

Ur info

[@leepederson5254]

Bubba!