EFR Turbos

CSA0890

I did the matchbot and you were right there is no good match for a single turbo. The 6758 is about as close to perfect as you will probably get for twins though. It sucks not being able to put more boost through this motor. Im used to running 25-30psi through my old Cobalt

MyKindaGuise

Hey all, Been a busy past two days between work and then dealing with this stuff.

Anyways we heard back from Full Race about the turbos...

They have recommended us to use the 6258's over the 6758's. We are still deciding on which way to go though... The 6258's will pretty much be instant spool on the VQ however they will be limited slightly as we approach redline. The power will taper off around 7100rpms if our math is right. Redline is also going to be at 8000rpms so we really have to be sure with our choice here. These are also good for applications up to 900whp. The 6758's will spool a little later but have power throughout the entire powerband. These are good for up to 1000hp. I like my instant low end power compared to top end so I am leaning towards the 6258's.lol I will post the email that I had from Raffi at full race with more details on these turbos.

He also explained the first run turbo issues and how they fixed them and why they have not gone public yet.

Basically the issue is certainly fixed. They used too weak of an alloy for the fusion bond performed on the turbine wheel and the shaft. They have since found a way to physically bond the two together giving it stability and reliabiltiy. They have gone through alot of testing since then, including running them on the Izod indy car this year. So torture tests have been quite thorough
Anyways he included many details on how all this was done but will not publicly post as they do not want other vendors getting in on this actions.

I am more now than ever completely confident in my future purchase from Full Race.

Also my buddy has done some drafting and he has atleast two ways that we will be able to fit these bad boys in there and do a twin top mount turbo

There is a slight issue however...Since we do not have physically models to play we cannot be certain but the hood may not have enough clearance over the turbos. Will keep you guys posted though. Even doing hard measurements it is hard to see how everything will sit exactly when fully hooked up.

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|445whp398tq|
|BW S259 Turbo|3" Downpipe\Exhaust|ID1000|AeroMotive|Tial|EcuTek|BC BR|S0-4|MaffFab|
MKGs-Single-Turbo

Isamu

you can run more boost.. just need to build it first

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黒子 ('Kuroko')
Project: SuperNova Owner/Operator and Lead designer @BlackGuard Aeroworks

theDreamer

Also, different engines and setups. You run that much boost on a VQ3.7L and you will be in the 800HP range which will require a good bit of other upgrades.
Definitely looking forward to results on this EFR setup, going top mount is going to be tough as I think you will run into hood issues though a custom hood would be nice.

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MyKindaGuise

Lmao hoods are lame who needs um!

Yeah we will know hopefully soon enough as to what clearance will be like. But oh well what's another mod amongst many at that point haha.

Also guys if we are successful and people are interested er will be up for selling the custom manifolds and piping and hell even a full kit if we get serious.


Also as promised here is part of an email.


Okay well knowing what you are wanting, the 6758s would not be the proper size.* The 6258s would be the right way to go.* Ill elaborate on the turbine wheel issue a little further down.* As for the power, the 6258 would easily make 500whp and would also be able to make up to 900whp.* What we have been seeing from the EFRs as a whole is that the turbo is actually making the "rated HP" to the wheels which means that after the parasitic drivetrain loss, its still able to achieve what its rated at.* The reason is because the turbos design and aero is much more advanced than what we have seen in the past.* In the past we would equate HP with LBS/MIN. so for example the gt3071 is rated at 46-49lbs/min and you would multiply that X 10 and get 460hp.. so the industry standard up until the EFR was 10hp per LB/MIN.* By the time that you installed the gt3071 and dyno'd the car, it would not make any more than 410ish whp depending on the tune and other variables (altitude, comp ratio, etc.) But with the EFR, the 6258 is only rated at 43-44lbs/min yet is making a consistent 450whp on a single turbo setup.* So the standard LB/MIN X 10 is more along the lines of X 12..

2 of the 6258s on the vq will be spot on and you would love the spool times and transient response for sure.

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|445whp398tq|
|BW S259 Turbo|3" Downpipe\Exhaust|ID1000|AeroMotive|Tial|EcuTek|BC BR|S0-4|MaffFab|
MKGs-Single-Turbo