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Junior Member
im finally ready to build my motor and i need a little help on my setup.......

my plans as of right now are:

-top end-
crower valves, springs, and retainers
crower turbo race cams
crower cam gears
portflow full race pnp

-bottom end-
crower 2.0 stroker kit w/ 8.5 CR
import builders sleeving

-fuel system-
aem rail,reg, and filter
255lph fuel pump
550cc rc injectors

i wanna make somewhere b/w 500 and 550 whp, i plan to piece together a turbo kit and i need help with turbo selection. i am thinking about going with a turbonetics T4 w/ a tubular stainless manifold, 3" stainless downpipe, spearco f/m intercooler, 3" intercooler piping, turboxs BOV and boost controler.

does this setup look ok for the numbers i am hoping, or am i on the wrong track? i am kinda new to boost so any help would be greatly appreciated. also, i am worried about turbo lag, any suggestions?



Junior Member
i have 10k to spend on the motor and the transmission

i was planning on running an ls transmission, dues to the longer gears, along with a lsd

does this setup look like it will yield around 550 to the wheels with minimal turbo lag and good throttle response?

also, what is a reputable company that does custom stainless turbo mainfolds and downpipes?



learning in progress
jdm itr tranny is where its at but buy onne from here




Junior Member
the jdm itr has short gears, i thought that with boost you wanted long gears so that you could stay at optimum boost for longer?

i already have a gsr tranny, would i be better off to just rebuild it and use the lsd than to go with the ls tranny?


GSR>LS Stick with the GSR and sure, add LSD to it too. GSR stock is stronger too. I believe it has a stronger diff.
Shorter gears = faster accelaration.


Senior Member
since no ones answering your Q...i think u should go with the Sc-60 or sc-61....those turbo's support up to 500 and 600 horsepower,and would be more sure a T4 could make it that high too,but its all on how close u want to cut it...

as long as u do full upgrades....3'' exhaust...660cc or 720cc injectors..big fuel pump,etc...and tune it right..and build the motor..u will make it to 500 horsepower...

make sure u get :

Aftermarket radiator
Big cooling fan
Bigger fmic
3" exhaust piping
Big Wastegate (38mm)
Big injectors
Big fuel pump
Fuel rail (optional)
wideband O2 sensor
Dyno time

if u build that head and block the way u say you are..and boost it..that will put u at about 500...if done right.


if you want to make 500+ hp, here's the set up.
you have 10k to spend, good. you'll need it... and a litle more even.

GSR block:
Benson Sleeves, 84mm. Contact for info.
CP pistons, 9.5:1 compression. 8.5 is was too low.
Pauter Rods
moroso oil pan
itr oil pump

thats about 3-4k

portflow or RLZ valve springs, retainers, MILD port work
crower 402T cams, or just stock gsr cams
JG intake manifold, or other high volume plenum.


GSR, Quaiffe LSD
gator stage 2 axles
act clutch/pp

if you already have the gsr tranny, thats like 2k in parts.

turbo setup: stage3 w/ t3/t67

fuel management:
walbro 255
uberdata or better EMS
GEmfg fuel rail filter-rail SS line
800-1000cc injectors

1-3k depending on ems

3" exahust
gauges, misc electronics, boost control, etc...

1-2k or even more...

so yeah, i blew away 10k a long time ago.

good luck. :p