Want More Power

[skyman]

hi guy,

i currently own a 94 R33 gtst. and am (was) aiming for around 250rwkw. i currently have 225rwkw@ 15psi using a claimed 450hp T04 with PFC, 550cc Z32 ect ect... engine is unopened.

now the problem i have is that if i try to run more boost the knock levels start to increase... af/r are perfect 11.9 to 12.1 but is not making much more power on higher boost setting...

i still believe the turbo can reach my goals.... but am now starting to wonder what else could be holding me back???? intercooler, exhuast, manifolds ????????

what do you guys think???

Edited December 1, 2005 by skyman

[Miller the hoon]

State all mods as small as they or as big so we can surjest stuff

james

sorry saw them now

Edited December 1, 2005 by Miller the hoon

[RANDY]

If it knocks due to pre-detination, could it be that the air in the chambers is too hot?

Do you have ajustable cam gears, and have you adjusted the timing when the PFC was done? I recken you might be able to squeeze a bit more out with cam-gear adjustment or something along those lines.

[skyman]

Havent got adj cam gears, wat kind of gains could i expect for them??? we have tried advancing but again the knock levels start to get up there.

cheer

[paulr33]

cam gears wont gain much. what exhaust do you have. what size is at and what combination at the dump and front level ? what cat?

[skyman]

exhaust is 3" one piece dump/front high flow cat, 3" rest of the way with an extra muffler the exhuast is quite 91db at 4800 not sure if that makes a difference??

[paulr33]

try a dyno run with the exhaust unbolted so turbo just vents straight out

see how much power you make

[Col-GTSX]

I would say a quick set of tomie cams and forget the cam gears...

Thats what i am doing.... Found cam gears are hard to get right and found limited gains/loses....

Edited December 1, 2005 by Col-GTSX

[skyman]

thanks paulr33

good idea ill have to try that. i was also thinking of doing a flow test on my intercooler, do you know who does them???

[skyman]

I would say a quick set of tomie cams and forget the cam gears...

Thats what i am doing.... Found cam gears are hard to get right and found limited gains/loses....

<{POST_SNAPBACK}>

wat power gains did you get from your cams??? where you able to run more boost??

[Miller the hoon]

I think you are pushing too much power with standard internals

240rwkw-250rwkw max with standard internals

plenium and do you hav a heat sheild and cai

mabe thremo fans

try 100ron and new tune as well

do you want power and or drivability

do you have a fuel pump and reg

james

Edited December 1, 2005 by Miller the hoon

[Col-GTSX]

Have not put the cams in yet....

Spent hundreds on the dyno with a hks cam gear and found it to be almost usless...

Im running 2 degres advanced atm on the echaust... But i lost a bit of down low pull....

[Col-GTSX]

Remember running thermo fans can be a pain...

Yes it creases less drag on the engine.... But when the fans kick in it puts extra strain on the alternator... So its it really worth it???

I did have a thermo fan on the hr31 only due to the lack of room after i did an engine exchange...

But found the temp to vary heaps and on a really hot day with the a/c on the thermo fan could not cope...

It was on almost all the time....

Id be checking out your intake temp and buying a set of cams.... 256 tomie's will do the job... Also a cai will help if you have a pod... Remember the colder the air goes in the colder it comes out....

[skyman]

I think you are pushing too much power with standard internals

240rwkw-250rwkw max with standard internals

plenium and do you hav a heat sheild and cai

mabe thremo fans

try 100ron and new tune as well

do you want power and or drivability

do you have a fuel pump and reg

james

<{POST_SNAPBACK}>

my aim is 250 so hoping internal will hold

plenium is standard and standard clutch fan, i have all standard heat shelds over the turbo and a good cold air intake system, i also have all suporting mods including pump and reg

and james i want both power and drivability dont we all!!!

thanks for the reply

[Miller the hoon]

Would a lightend flywheel do anything to power out put and clutch

any sliping

and last i can think of without doing internals is homing and porting your exhaust manifold or go after market 1

james

[skyman]

Would a lightend flywheel do anything to power out put and clutch

any sliping

and last i can think of without doing internals is homing and porting your exhaust manifold or go after market 1

james

<{POST_SNAPBACK}>

not sure if if a lightend flywheel does anything for power??? clutch isnt slipping

ill try to find someone to test my cooler, hoping that will be the problem.

if not ill might have to look into porting, manifolds and or cams

cheers

[paulr33]

stock internals should be fine upto around 280rwkw, he certainlty wont be at any restriction of the plenum or intake at 225rwkw thats for sure. you can check to see if your loosing pressure by recording boost at the turbo outlet and just before the plenum to see if your dropping pressure. boost doesn't make power, airflow does. upping boost will only amplify your problem, it will add more heat. more heat = bad. drop the exhaust on a dyno run and see how much you make. if you make lots more (which im guessing you will) then you need to look into a 3.5" exhaust and a split dump system and big mouth cat as well will most likely help

[skyman]

stock internals should be fine upto around 280rwkw, he certainlty wont be at any restriction of the plenum or intake at 225rwkw thats for sure. you can check to see if your loosing pressure by recording boost at the turbo outlet and just before the plenum to see if your dropping pressure. boost doesn't make power, airflow does. upping boost will only amplify your problem, it will add more heat. more heat = bad. drop the exhaust on a dyno run and see how much you make. if you make lots more (which im guessing you will) then you need to look into a 3.5" exhaust and a split dump system and big mouth cat as well will most likely help

<{POST_SNAPBACK}>

if i can recall i have around 1.5 to 2 psi pres drop. will try the things you have mentions next week....

[Miller the hoon]

paulr33 if it is the exhaust how much are we talking about

i thorght 3'' with hiflow cat was good to 300rwkws

and skyman wat did your tuner say wat would he recomend

and wat ebc is it on the pfc and are they a good bc

james

[skyman]

paulr33 if it is the exhaust how much are we talking about

i thorght 3'' with hiflow cat was good to 300rwkws

and skyman wat did your tuner say wat would he recomend

and wat ebc is it on the pfc and are they a good bc

james

<{POST_SNAPBACK}>

turners not sure but thinks the turbo may be out of flow?

not using electronic one just a cheep daul stage one which has been holding nice steady boost for 3 years now....