Jc052685

was in the high 120s at 13psi thats all I have for now.

The car is fixed and he drives it often.

We took the car to the track. The car got stuck in safety boost some how. Also ended up killing the front diff. Customer does not want to go back to the track yet and risk hurting the car again.

So you are saying that the exhaust housing is incapable of flowing enough air through it to spool the turbo its self? So in your theory you seam to think we dont know what the exhaust housing will flow..... well we do

Ok, so the turbos glowed and the boost dropped off... Turbos glowing - excessive egt.... why? Boost falls off - Compressor cant keep up (out of flow). Not related to exhaust housing restriction. If anything boost would remain at targeted level because the gases cant escape the engine quickly enough.

Look, I was letting this thread sit till we ran the car at the track except I keep getting multiple emails a day with you jack holes cluttering up the tread. I am not stating anything until I run at the track. So we are looking for high 130mph?

well, they sorta relate I suppose lol

What do statistics have to do with definitive measured data? FYI - you still have not answered my question. hint: its because you dont have the information to answer said question.

That is assuming that anything after the collector is in fact a restriction... You have no data showing that it is or that an externally gated setup will benefit this specific application. I would also like to point out that everyone seams to be laying the burden of proof on me. Has anyone here specifically dyno'd on a dynojet to say that it reads high? Car will see the strip. Just got the clutch sorted out. Now working on a tire rub issue.

I dont need to google anything. I am the one here that made record numbers on -5 turbos. I specifically asked YOU what is the restriction? What is the back pressure ratio on -5's? What is the back pressure ratio change when externally gated? What specifically is the advantage to externally gating these turbos on this engine?

A restriction compared to what? Any turbo will be a restriction.

what makes you think the factory gates are restrictive?

And the Camaro in the pic dyno'd about 15whp lower than our dynojet. Quite a bit off from how far you guys have said it should be.

no sir, we have the Aussie calibrations. Made sure of it.

Its a Mainline..... Straight from "down under". Still have the dyno builder here setting it up.

Guess we are gonna find out how your Aussie HP stacks up

2000lb of rolling inertia....

Not sure what you are talking about...

Off course even dynos of the same brand will have some sort of variance. I think that is why the USA likes the dynojet stuff because it seams to be the most consistent and there is no way to artificially inflate the HP that it reads other than putting a hair dryer or something on the weather station. But you would still see that in the run conditions. We work with primarily Chevrolet any more. Started out in the import world. Just an FYI, we see anywhere from 15-20% losses on most cars from their rated crank HP. Any thought on this? Does anyone one happen to know what any of the factory chevy products are putting down on your dynos? We have a mainline dyno ordered that should be with us when we move from out current 4500sq/ft facility to our new 18,000 sq/ft building that we have built. So what if we were to just take the dyno out of the crate and run the car? Any reason those numbers would not hold up? Dont have one at the moment

Not only that, but I am Texan!!! I am off work in a few hours so I will be back when I have some time to sit down and go through all of this.

And I still have not gotten an answer to whether you guys will accept Mainline dyno numbers.

Track closes 2 weeks for Christmas & new year...

Sorry but no. That car was built for speed competition such as standing mile events (see: The Texas Mile). The car did 168mph at the half mile & 203.8mph at the mile marker. We have another camaro that made a touch over 750whp. Also through a 3" exhaust, it frequents the 1/4 mile often. Best pass to date on a stock short block & stock auto trans is 10.3 @ 137mph @ 4160lb That car has a similar turbo system as the higher power car, just a much smaller Precision 7175 turbo.

Still have some things to do before the Gtr will be able to hit the track

2010 Camaro