i have a gsr engine with a fmax kit. some reason i can't boost past 13lbs. any suggestions. thanks


engine
B18c1 with fully built block cept crank
JE 9:0:1 compression
crower rods
walbro fuel tank
aem fuel rail
3 bar map sensor
rc 550cc injectors
darton sleeves
crower valve train
JG intake manifold
fmax turbo kit
tial wastegate
greddy bov
apexi n1 exhaust
apexi power fc



Modified by joe pagolac at 9:59 PM 9/11/2003

 

also have 3bar map sensor too forgot to add.

 

use a boost controller or get a different wastegate spring.

 

i have a boost controller too already forgot to mention. already tried a different spring rate didn't help out. even when i'm boostin 13lbs i look at the gauge and its not consistent, the power drops and goes back up again. weird

 

i talked to the tuners already too and they said the only problem they see is the turbo is small, but i don't think thats it. the turbo was intentionally meant for an si but does that has to do with the restriction on high boost.

 

the turbo you have should be a t3t4 if its an fmax. you should be able to boost a lot on that. anyway check how your vac lines are all hooked up to the boost controller and make sure your boost gauge is acurate. try different spring rates too,

 

vac lines are all connected and tried higher spring rate also didn't help out.

 

i've seen cat's that get melted shut from turbo's witch can limit boost.

 

set ur downpipe 3" .... i see that problem.....set ur downpipe 3" and finish not 13psi wall

 

if you have the turbo xs boost controller check the direction of the V, it must be facing to the vacuum source

 

no its a greddy boost controller? i don't get what you're saying axxais