Compound Turbo setup for the S10

[Dagazenterprise]

I was sitting at work with nothing to do so i came up with the idea for a compound turbo setup for my truck in hopes i could achieve boost a little bit sooner, i did some searching on youtube and found this, more or less what i drew up, it's nice to know that someone else has the same idea and it works, now all i have to do is figure out the other turbo's size and i'm good to go

http://www.youtube.com/watch?v=y-Me6yWApzY

[Ballistic Motorsports]

You can achieve the same with Twins seeing you have a v8 and it would be much less fab .


I built a TT Spyder that spools in reverse

[WTFWBBD?]

You can achieve the same with Twins seeing you have a v8 and it would be much less fab .


I built a TT Spyder that spools in reverse

Turbos cant spin backwards!!!! or can they....

[ill_eagle94]

Turbos cant spin backwards!!!! or can they....

Yeah it's like playing a record in reverse. You either get a subliminal message or the voice of Satan! I'd like to hear the second one!

[WTFWBBD?]

lmfao!

[OVRBST]

Before I even clicked on the link, all I thought about was Boost Logics compund setup. It works AMAZING from all the data I've gathered.

Another option for you (easier one), is the SP quick spool valve. It requires an undivided header (or a single big ass pipe in your case), and a divided turbine housing. When the valve is closed, it esentially sends all the exhaust gas into one of the divided sides of the turbine housing. It makes the turbo act like it's A/R is 1/2 the size it actually is. Once you hit a boost target, the valve opens and allows the gasses to enter both sides of the turbine so you get the power out of it.

http://www.spracingonline.com/store/Sound_Performance_Quick_Spool_Valve/3659

[Dagazenterprise]

that would be easy enough to make, the flange i made i could just modify it with the butterfly valve, im not spending 450 bucks for something like that, although it is a great idea

[polarisman14]

Alex, that sounds similar to aeroturbine's variable vane technology. Unfortunately I don't think it ever got utilized in high hp capacities, but it worked well to create basically instant spoolup at pretty much any rpm, and this was on a zetec ford focus (nothing special there--just an exceptionally poor head design that produces limited exhaust gases).

Robin, your other option is to snag a used turbosmart e-boost2--it has sensitivity and gate pressure adjustability settings which allows you to change the psi at which the wastegate starts to open in order to regulate the boost (gate pressure) and keep spikes from happening (sensitivity). This wouldn't require any real fabrication on your part and would also prevent any consistency-related boost issues. I've been using mine for about a year now and it works great. With my STS system every little bit helped for spool and this made a pretty significant difference.

You can also ceramic coat everything in front of the turbo and heat-wrap it all to retain the heat of the exhaust gas--more heat expands more and spools quicker at lower rpms. If you really want to get creative, you can use nitrous to help spool the turbo IIRC as well.

[4u2nvme]

Before I even clicked on the link, all I thought about was Boost Logics compund setup. It works AMAZING from all the data I've gathered.

Another option for you (easier one), is the SP quick spool valve. It requires an undivided header (or a single big ass pipe in your case), and a divided turbine housing. When the valve is closed, it esentially sends all the exhaust gas into one of the divided sides of the turbine housing. It makes the turbo act like it's A/R is 1/2 the size it actually is. Once you hit a boost target, the valve opens and allows the gasses to enter both sides of the turbine so you get the power out of it.

http://www.spracingonline.com/store/...ool_Valve/3659

Wow, I havent seen that before! Thats friggin cool

[OVRBST]

The principal of the valve is awesome. I'm sure if you have the resources it'll be cheaper to build, SP just took all the work out of it.

People that have the valve have some amazing results. ABM used it on a 3.4L (stroked 2J) and a GT4508R (81mm T4) and were able to make 30psi by about 4500 rpm. That turbo didn't make 30psi on my 3.0L until about 6K+

[bayside blue]

Before I even clicked on the link, all I thought about was Boost Logics compund setup. It works AMAZING from all the data I've gathered.

Another option for you (easier one), is the SP quick spool valve. It requires an undivided header (or a single big ass pipe in your case), and a divided turbine housing. When the valve is closed, it esentially sends all the exhaust gas into one of the divided sides of the turbine housing. It makes the turbo act like it's A/R is 1/2 the size it actually is. Once you hit a boost target, the valve opens and allows the gasses to enter both sides of the turbine so you get the power out of it.

http://www.spracingonline.com/store/...ool_Valve/3659

thats insane! ill have to think about it for the miata..

[Dagazenterprise]

looks like a regular integral wastegate diaphragm hooked up to the butter fly valve, if i could find one that's set to open at say 3 or 4psi that would take the restriction off and let it spool up to 11 in no time, i'd just plum the valve into the compressor housing so it would react quicker, the wastegate is plummed to the manifold so that turbo can be making boost while the intake is still seeing vaccum,

[paulo744]

The principal of the valve is awesome. I'm sure if you have the resources it'll be cheaper to build, SP just took all the work out of it.

People that have the valve have some amazing results. ABM used it on a 3.4L (stroked 2J) and a GT4508R (81mm T4) and were able to make 30psi by about 4500 rpm. That turbo didn't make 30psi on my 3.0L until about 6K+

I want my valve to go in soon damnit! I should've went for a .96 a/r housing instead of the .70. I see 16 psi at around 4400 in 3rd gear, give or take.

[TwnTttyLexus]

Polaris man, it has the same effect, but i dont think these designs work the same way (sp valve and Variable Vane)

The Variable Geometry Turbo's come in two flavors so to speak lol. one has "aerodynamically shaped" fins in the turbo inlet that move at different pressures, thus constantly changing the space in between each tip of the fin and creating what people like to call "variable aspect ratio". these are used on the 2007 Porsche 911 turbo but theyre Borg warners.also Vw 1.9 Diesel's. i think ....


the other type is well. i dont know what it is. the valve the way people describe it doesnt seem to work like that.

it sounds like i just Wiki'd that info, but to b e honest i didnt. i wiki'd it along time ago when i did a project for auto shop on turbochargers and forced induction.