When your boost tapers from 40 to 35 lbs and you go from making 750 to 650 whp at the top end of your rpm range I don't think you will have time to contemplate that issue

Scorke

 

I reckon stick with the 1.06.

there is prob a diff of spool of maybe 150-200 rpm with going with a smaller one.
buy both and test and see which one you like if you want it to come on sooner.

 

Here is the turbo that I made my mind on the GT4088r

 

Not the best advice on the twin scroll stuff. I've seen bigger A/Rs spool just as fast and really pick up power up top. Twinscroll stuff seems to have an optimal A/R where bigger or small just hurts you all around.

 

awesome manifold....ETS guys do excellent work and their welder is awesome.

 

Did I say run the smallest A/R possible?

NO.

You're a typical engineer, no reading comp.

Every setup has its optimal A/R it will vary depending on the build and the owners expectations/wants.

Scorke

 

Josh - I'm glad you got the pics!

Michael

 

No, I read what you wrote and comprehended it just fine, thanks. I just disagree with what you said.

The smallest A/R that meets your HP goal may just give you the lowest HP for a given spool characteristic. That's my point.

 

The smallest A/R that meets your HP goal will give you the best spool characteristic, unless you prefer lag with any application. I doubt there are many twin scroll hotsides out there, unless there are some that are less volume substantially than their single scroll counterparts that give up spool whilst going larger.

Scorke

 

how about the t4z88hta ,thats wat im running and spool is the same as my old standerd gt35r .

 

Where is the question?

Scorke

 

Got any updates on the ts t4 40r???

 

They just shipped the turbo on monday and I should get it by friday!









--Josh

 

 

I saw that also and have to wonder, what was so incredible about it? they had to run 38psi to just break 700awhp on C/Q16....


our GT37R kits are putting down ~650@28psi on 109unleaded and a couple on E85...