Parallel Turbos

[Short Bus]

WTF is a parallel twin? At least get the nomenclature right.

Twins(parallel if you prefer) refer to two (2) equally sized turbos with one feeding each bank of a V block or half of the cylinders of an inline block.

Compounds refer to a large atmosphere turbo feeding a smaller high pressure turbo. You can call them primary and secondary if you prefer.

The terms "twin" and "compound" are not even a cousin to interchangeable.

Saying parallel twins is synonymous to Twain saying "suppose I am a politician. Then suppose I'm an idiot. But I repeat myself". ointlaugh:

Sorry to go off on you, but this kind of crap drives me nuts. Twin turbos and compound turbos are 100% completely different. :grouphug:

I'm sure many of my mistakes drive others nuts.

:biggun:

Shut the **** up, I will call them garden hose grape vine compounded corn flakes if I want to.


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[Powerstroke Cowboy]

My billet s482 is supposed to flow 2200 cfm at 45 psi. An s366 is 1100 cfm at 35 psi.

This has been bugging me. Where did you get that information??

Look at it like this. In Order for the S482 you have, to flow 2200 CFM it would need to be right at 150 to 155 LBs a minute.

But All the ones I can find are 130 LB min and less, that makes them under 1880 CFM??

What am I missing?

The S366 I was talking about that has the twin scroll .83 A/R housing. It is rated at 84 LB min. That makes it right at 1200 CFM.

This post is to ask a question to find out what I my be missing?? Unless you have a S482 I have never seen. If so that would be great!! That would mean the turbo would be rated for 1500 hp

 

[PowerstrokeJunkie]

It may be a fmw482..

That said the fmw compressor technology is awesome.. Look at two s362's with the .83 turbine housing. I'm running one on my truck with a weak pump and stage ones and the turbo is super responsive and a blast to drive. Comes on strong down low ... I can make 10 psi just below 1600 rpm. Boost comes on hard at 1750- 25psi+. Makes the truck very peppy on the bottom end.

 

[Powerstroke Cowboy]

The FMW 482 only flows 125 LB min. that is about 1800 cfm. Do you have the .83 on your turbo?

The billet S362 flows around 74 LB min. That comes out to right at 1070 CFM.. They would still flow the air needed.

 

[PowerstrokeJunkie]

Yes .83 turbine externally wastegated. Rarely ever hear the gate howling out the exhaust. If I upgraded the nozzles I suppose one would be necessary

 

[Matt]

What about doing a high pressure in the passenger side fender well, and two atmos out front like the H&S Lightning with the Cummins. I like the parallel idea, but triples just seem to work so dang well

 

[kyle43335]

Most are. What brand are you referring to?? This company claims that they have never had a problem to date with them.

http://compturbo.com/

 

[Powerstroke Cowboy]

Thanks. I will check into it.

I have been talking to guys that run them. There is a key to what they are supposed to be run in and where they need to be mounted.

 

[vanderchevy18]

I just did a Google search. I have the billet wheel with race cover, 92mm turbine wheel and 1.1 (I think) turbine housing.

 

[Bair]

Forward flowing headers. Front mounted turbo(s). Is that an option for a dedicated race truck?

 

[Powerstroke Cowboy]

I just did a Google search. I have the billet wheel with race cover, 92mm turbine wheel and 1.1 (I think) turbine housing.

Like this one Chris??

I will let it rest after this Chris. Just trying to understand or figure out how it could flow those numbers. It has me scratching my head. Now if it was a 88mm I would see how but the 82mm do not do it. BUT maybe they are getting better. That would mean a quicker spooling compound set up.

 

[vanderchevy18]

Yes it's just like that one. Like I said, I just googled it.

 

[vanderchevy18]

Forward flowing headers. Front mounted turbo(s). Is that an option for a dedicated race truck?

Yes it's an option I might put them where the headlights go. I'm just trying to get the turbos figured out first.





So y'all think the s366's are too big huh? Maybe I'll look in to s362's.

 

[smoker00]

I think two 66 is pushing it.

two 62 with gates so it spool nice. And spray the piss out of it..

Some cam work i think would help twins out. A lot..

And flip the manifolds and move the turbo up front…

 

[DocBar]

Shut the **** up, I will call them garden hose grape vine compounded corn flakes if I want to.


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Ever got drunk and ran your head? Happened to me. Sorry dude.
:blitzed::morons:

And sorry to Chris for the minor derail.

 

[vanderchevy18]

Hows bouts a couple GT3076R's? That do anyhing for you guys?

 

[Powerstroke Cowboy]

Chris I think the S366 in the right configuration would be the perfect fit.

The 7.3 stock gtp38 and tp38 turbos have a exhaust wheel size of 76.2 mm with the turbine wheel exducer diameter at 69.84. Just think how fast two of them would spool EVEN with a 66mm comp wheel and the factory .84 A/R housing of the SD pickups. You have 400/400 injectors to help verses the factory 148/slow injectors. These would lite FAST and stay lit. your shift point will keep you in the 2500 RPM range and up. They would light.

Now you can get the S366 with the billet wheel and with the .83 A/R exhaust housing. Now look at this. Along with that tight housing you can get the 76.2 mm inducer / 67.5 mm exducer turbine wheel. This turbo is rated @ 84 LB a min so with two it would be like 168 LB min. That comes out to right @ 2431 CFM ... I think it would work quite well.

 

[Powerstroke Cowboy]

Hows bouts a couple GT3076R's? That do anyhing for you guys?

Two of them would flow less then a single GTX4202R

Now two of the GTX3076R would flow right @ 15 LB min more then one GTX4202R..

Not a good fit i would say.

 

[vanderchevy18]

Honestly I think I've already made my choice. I'm going to go with a pair of s360's with divided .91 housings. http://www.theboostlab.com/store/products/S300SX3%2d60-.91-A{47}R-(Straight-Compressor-Outlet).html

Not sure if you guys are the ball or the wall, but it's nice to bounce ideas.

 

[Powerstroke Cowboy]

Well they would be better the the GT3076r Idea. Combined the 360s would be right @ 1880 CFM... Now i might have to do a build and use the 366 turbo.........