R33 gtst Limitations

[25GTT]

Heya guys!

Well I am doing a few mods again to the car and am wondering what limitations the standard Injectors, clutch, fuel pump and turbo have.

This could be a good knowledge base should some of you guys want to perform mods in future:cool:

I have heard that the clutch goes to about 250rwhp however i myself am making much more than that and is still holding ... JUST!! so i do agree with that statement as far as reliability goes now what about

turbo:

injectors:

fuel pump:

how many rwhp do you think they will last up to. also as discussed with members such as skyzer, rev210 and gtstvspec (THANKS GUYS:uh-huh: )instead of injectors a malpassi fuel regulator can be the way to go to get an extra 70 rwhp or so. i have heard ups and downs though about this. KILLERT did you have probs with your fuel regulator? anyone else?

[skyzerr33]

well killer-t went the malpassi as its a cheaper option than replacing the injectors. hes up to about 300-315rwhp atm i think.

He was close to 100% duty cycle with the injectors at this stage teh malpassi has given him more room to play with the stock ones.

yes a number of hard launches and ur likely to fry your clutch at your current power.

Fuel pump may or maynot last i can't remember the specs on the stocker, u may want to replace just to be on the safe side.

turbo will most likely be at its limits now.

[Guest KILLER-T]

Funny you should ask about the fuel reg because im getting my car tuned tonight ever since i have had it on the car its been running hell rich PSI is doing the tune at 8pm tonight so if anyone wants come watch and get gased by fumes be my guest :burnout:

[skyzerr33]

adam can u expand on what limits ur car was at before upgrading the turbo, fuel pump etc

[Guest KILLER-T]

I think the the most power i got out of my stock turbo and fuel pump was 240 rwhp and it made that power for around 1 month then the fuel pump died i think it was workin real hard and the turbo was on its way out at this point to but i think that was my own fault running 14-15 psi in the middle of summer

[rob77]

I heard some people like to tune cars rich so as they dont lean out too much and dont detonate. What ecu have you got killer-t? I was thinking bosch fuel pump, nismo regulator and a power fc in mine.

I heard the malpassi wasnt too crash hot.

[Guest KILLER-T]

I got a Power FC Pro but i cant use the extra functions on the pro untill i get some software for it which looks like will never happen unless the mob in NZ get their act together and bring out the FC datalog software for the RB25 this year sometime i hope

[rev210]

the supra twin turbo fuel pumps 1993 onwards are good for 600HP or so.

The standard injectors are good for a fair bit with a malpassi hooked up.

[rev210]

the malpassi is a very good regulator. Anyone tell you otherwise is in the minority.

[benm]

(rwkw / 0.7455 = rwhp)

Im making 272rwhp and my clutch has just gone. (Although its a hard daily driver constantly on 7psi - 249rwhp). Even though i thought the clutch wasn't slipping and felt reeeeally smooth ive realised after having my new clutch installed today that it was deffinetly lacking performance.

Stock ECU

Stock Turbo

3" Full Exhaust

FMIC

HKS Pod

68,000km on the clock

thats it....

I'm sure my stock injectors and fuel pump are nearing the end of their lives but i have no easy way of telling.

Ben.

[N I B]

I had a Yellow R34 GTS max the fuel pump at 311 rwhp today

so we are fitting a SAFC and Bosch pump.

This thing was making this power at 16psi with a cooler

and Exhaust and a cheap un knowen turbo ($1500) and

was still climbing but we had to back of because the fuel pump.

Will let you now the final out come but 350hp looks possible.

[adam 32]

I heard some people like to tune cars rich so as they dont lean out too much and dont detonate

make sure they do. a rebuild is not a cheap or enjoyable experience when the workshop claims it wasnt their fault your car blow up on their dyno while they were 'tuning' it

[Guest KILLER-T]

Ok the limits of my injectors is 326.3 rwhp and there is not alot of head room left in them so i know whats on my shopping list.I just need to butter up my g/f first

So fitting a z32 afm and fuel reg gave me an extra 22 hp not a huge amount but just enough to notice a bit more pull in the car:burnout: :burnout:

[N I B]

Not Jap rich though 11.8-1 is sweet for a streeter.

Jap tuners have more chance of hydrolic lock than detonation

with the AFRs they run.

[Guest Peewee]

haha so true steve but over here you see a lot of guys tunig to mid to high 12's but if tuned in summer come winter when the air is denser they WILL lean out! Killer t i reckon a big pump and malpassi you will be able to stretch 50 at least from your injectors but don't skimp on your pump

[Guest Works Auto]

He already has both them two things.

[25GTT]

Originally posted by KILLER-T

Ok the limits of my injectors is 326.3 rwhp and there is not alot of head room left in them so i know whats on my shopping list.I just need to butter up my g/f first    

So fitting a z32 afm and fuel reg gave me an extra 22 hp not a huge amount but just enough to notice a bit more pull in the car:burnout: :burnout:

so the limit of your injectors of 326.3rwhp is that including the malpassi fuel regulator? Brett didn't seem to be a big fan of it the other day though????

[skyzerr33]

yes dan thats with the malpassi and with a bigger fuel pump he could possible get some more out of the stockies.

[Guest KILLER-T]

yep 326 is the max i can get with this set up and yes hendo dont like malpassi fuel regs but alot of other people like them so i think its just a case of different people like different things :uh-huh:

[GTS-t VSPEC]

What fuel pressure are you running?

See'ya:burnout: