Hi everyone!! Just wondering if this was a good turbo for a S4TII:

-Model TO4B69- Garrett

-A/R ratio on comp. .60 & turbine side is 1.32.

-Turbine trim P, housing no 407263-35

-Compressor trim V-1

-Center housing rotating assembly no. 408316-8

Im looking to make 350 rwhp, have all supporting mods.


Thank everyone very much in advance for any info!

 

wow a 1.32 on the hot is big. i sure hope that your motor is ported though. i feel that you should make about 350rwhp with this. what kind of supporting mods do you have?

 

1.32 is a mans hotside! But far to large for 350HP. Go with .96 and you'll be happy.

 

So too big on turbine side would mean I would have a unwanted amount of lag right? Yes the motor has a mild street port-New Rebuild, 1600cc Secondary, 550 R.C Primary, Walbro Pump, Wolf-3D EMS, FMIC, Crane Hi-6, Premixing, Koyo radiator Etc. Thanks Aaron Cake!!!

 

if you want 350rwhp with good spool you should get a stainless steel tubular turbo manifold with a divided flange. then if you can afford it a ball bearing turbo... also your street ported motor should help

or just get the cheapo HKS cast manifold undivided, .96 A/R P-trim hotside, .60 or .70 A/r 60-1 wheel (like a T04S). That's a proven turbo, although it's not as fancy or responsive as some of your other options. That's pretty much my exact setup: big street port, T04S, HKS cast manifold.

Even cheaper route is BNR stage 3 hybrid turbo (s5 for quicker spool) which uses the stock turbo manifold..

 

Very nice arghx! Thanks Guys......This is why i still enjoy and continue to drive a RX-7 because of people like you.....= ) and yeah some day a GT35R would be nice

 

I dont want to start another thread, since this one is close enough to what I want to know.

What about using a disco potato with a tubular manifold and an external wastegate? Would that be worth it because of the response, or will it not be enough bang for the buck compared to a BNR upgrade?

 

Basically.

For a street port, that hotside is much too large. .96 will be a great choice offering good spool and won't restrict the top end.


The disco potato is a small turbo based GT28. It's a T25 hotside. WAY too small for any rotary. Maybe use two of them....

 

Go big or go home!
-> owner of a T04E with a 1.32 A/R turbine



-Ted