3.5L = ?Turbo

[2xmks]

My question is what twin turbo setup would be a proper mate for a stroked( 3.5L) engine. I was not able to find any flow charts with this set up. I can assume certain variable changes on the chart, but???

I would be looking for something with a similar spool as my 3.1L and E316G's. Not having to change my TD05 headers would be a plus (even though I would add external wastegates). Now 3SX has the Garrett GT-3076RL. Would the TD05 exhaust housing on the Garrett limit me to the point where my 16's would be a better choice? 18G's? 20G's? DR Turbos?

I have 3SX Stage 3 Heads with oversized valves and Webcam Race Cams, so I am hoping proper head flow is not an issue. The car is my weekend car so some streetability would be nice.

I would like a nice 600-650 awhp, 91pump.

Any help/suggestions would be greatly appreciated.

Mike

[jeettao]

DR-1000's probably. Ball bearings to kick up the spool a notch. (DR turbos seem to be a little more efficient in those power ranges than the 18/20G's, but this is a sort of speculative thing. DR-1000's are much more proven than the bigger MHI wheels).

[JasonY]

Id slap on some bastard 20g's since those would be the cheapest and see what they can do with the extra displacement. 16g's can do mid 500's on pump with a 3.5 most likely with ease, i bet the extra flow of the 20's would get you to 600.

Jason

[DCIV]

Didnt t4 use a tdo5 hotside with something diff to make like "800awhp"? They might not publish what it was but I bet they would sell it to you. That would save you from getting new headers and everything.


Coop

[2xmks]

3SX offers the Garrett GT-3076RL which uses the TD05 hot side. Not sure if thats what they used or not.
The E316G's have a nice spool time on the 3.1. The 3.5L would spool them faster, I would just hate to run out of flow. I like the idea of 20G's just because they are the under dog as far as on a 3.0 they have way to much lag. They are not a common turbo at all. From what I can tell the 20G's look like they would spool (on a 3.5) like the evo's on 3.1, maybe a hair faster.

Those Garrett's are pretty sweet though, I like the idea of having a ball bearing turbo.

[Kibwe Walker]

The 20g's would be the cheaper way to go and probably meet your power demands.

The 3076's would be more powerful though, probably more powerful the dr1k's. Ray Pampena's car (Dragpro) had 3076's on there when it was making 6xx on pump gas and came close to 900 AWHP too.

Its your choice but you can't lose either way. Both will be a good deal of power. If it were me I would opt for the dr1k's for better spool but since you already have those manifolds I would just go 3076 and have a monster of a setup. The stroker would take care of the bottom end and about 4k when the 3076's come in all the way you should be, umm looking towards the horizon as you will soon be there .

[cbehnken]

everyone always assumes you must get bigger turbos for the 3.5s. I think it would be nice to try the E16Gs on the 3.5 and just see what they can do.

Awesome spool and should kick out 550 WHP on pump.

The 91 octane is going to be your biggest problem. Have you considered meth?

[2xmks]

Yeah I will be installing meth here really soon. Just have not had time.

[Black_Sunshine]

if the 3sx GT-3076RL uses the td05 hotside, then the housing is identical to the 20g, both being TD05H-7cm2. the difference is in the compressor side where the garret turbo is much much larger. 20g wheel is 2.070" inducer/ 2.680" exducer and the GT-3076RL is ? i could only find info on the GT-3076R which is 2.24" inducer/ 3.00" exducer. the GT-3076R is rated at 752 CFM, 102 CFM more than the 20G. that's a HUGE difference in CFM.

so i would say the 20G will spool faster due to the smaller compressor, but it won't make near as much hp that the GT-3076RL can make. of course, you can get porting and clipping options that would help spool on either turbo.

however, i think ur more concerned about it not being efficient for the 3.5 stroker. i can't give u any concrete answers, but here's some facts to consider:

widowmaker's 15g's were found to be inefficient for the 3.5L because the turbines are way too small.
15g's use the 6cm^2 housing which = 0.41 A/R.
16g EVO3/ 20G/ 3sx GT-3076RL use the 7cm^2 housing which = 0.49 A/R
The DBB DR-1000 turbo kit has a T-3 housing and .48 A/R, which was enough for 9's on matt's car. I don't recall, but was Matt using the 6g74 3.5L (non stroked) engine on that run?

*note* a standard GT-3076RL has an A/R of .82 or 1.06

conclusion: imo, 20g's would be ok if ur on a budget, but i think the 3sx GT-3076RL just offers sooooo much more potential in terms of power. of course, the 3sx GT-3076RL are +$1200 over the IPS 20g's. get the 3sx GT-3076RL and have them clipped and ported .

[SnakeSkinner]

Originally Posted by Kibwe Walker

Ray Pampena's car (Dragpro) had 3076's on there when it was making 6xx on pump gas and came close to 900 AWHP too.

He had 82mm compressors got 76mm's