The FP big16g for subaru uses a 7cm turbine housing.

The stock 16g for the 05 evo 8 and Evo 9 uses a 10.5cm turbine housing.

The stock 16g for the 03-04 evo uses a 9.8cm turbine housing.

The big16g for the DSM's uses a 7cm turbine housing.

Not all "big16g's" are created equal.

The FPgreen for the subaru uses a 7cm turbine housing.

The FPgreen for the evo uses a 10.5cm turbine housing.

However, its the turbine housing design and wheel size and design that really matters.

 

lol brain fart...

 

Medway is evo gawd, all must bow before him!

 

I needs me a vf39

 

That was really useful information there bro

Honestly, Bryan wouldnt even consider himself an "evo gawd". He simply works hard at what he does, takes him time and double checks everything.

 

back on topic, I need to start selling "oranges" to savemoney for my Green ($1500 OUCH!)

That way I can make this on 91 and the 104 map will be wicked.

 

you were running 23 psi on 91 oct?? thats a lot of boost for the vf39. i made about 5hp/tq less with only 16psi.

 

I run 1.5 bar on 91 (sometimes w a gallon of 104 for knock protection) so yes, but the gauge is .1 high so maybe 1.4bar

Running 1.8 :O on 104

 

Ok with a help froma long time drag racer he says I should be shifting @ 5600rmps do to my dyno graph.

So my dyno is here



And here is the gear ratios for my STi and how I should be shifting and what it will drop to rpm wise.



Any other drag racers want to put their input in that have experience with this stuff?

 

5600 is way too low. You are going to have to shift close to redline.

 

if you shift that low, you will be way out of the power band for the next gear.

although your HP levels off, I would still take it to 7k so the next gear will be higher in the RPM and your power will not fall off as much.

 

earl (EJ257) shifts at 6k and consistently runs 12.2's on his stock turbo

 

Doesn't the graph show that I will fall into the best part of my powerban if I shift @ 56-5800. Makes it drop to the mid 4k's where I am PULLIN.