garret t4 help

[wardog]

:aigo: im trying to upgrade from my ct26...i came across this garret t4...which is the compressor side has a v trim wheel with a 60 a/r and the turbine is a 58 a/r ,,,,
this is the web side of the compressor map but i dont know how to read it
my goal is 450-500 whp on my supra will this flow enough any help would be great thanks

http://64.225.76.178/catalog/compmaps/fig7.html

 

[ToyoHabu]

turbo maps 101

 

[wardog]

read it but still confused....so this turbo will flow about 47 lbs/min .....right on or im i stil lost in the sauce.....

 

[ToyoHabu]

I have created flow potential for my 1jz at 100% VE 100 Fahrenheit day at several boost levels and rpm. The lines represent an rpm and they relate flow at that rpm for a given a boost ratio. I choose 7, 12, 15, and 22 PSI. This means this turbo should be a great match for the 1jz. to get a rough idea what HP it should produce choose a boost level say 12 psi or about 1.8 ratio, at 2000 rpm its flow about 14 lbs/min at 7000 rpm its flowing 32 lb/min to give comparison at the 2.5 ratio its flowing 21 and 49 lb/min. this roughly will be 140-320 hp and 210 - 490 hp respectively. More important it indicates that full boost should be achieved by 2200 rpm. This is all based on my current understanding of reading comp maps. I am still learning however.:icon_bigg but that is what makes it fun. BTW here is a great turbo sitehttp://www.rbracing-rsr.com/turbotech.html

 

[wardog]

so 12 psi with proper mods i can achieve about 320....and about 18psi will achieve about 490 how the turbo lag on one of these turbos....i have a 7mgte...

 

[ToyoHabu]

You should lag less and produce more power, the lines will shift a little to the right for the larger engine.