R32 Gtst Questions

[G-Money]

ok just bought a r32 gtst 4 door my first turbo car, was just wondering a couple of things

1. what are the disadvantages of running higher boost without a front mount, will get one soon but don't have the coin atm

2. how much boost can the factory BOV handle ??

3. how much boost could i run with this stock set up???

any help would be appreciated

Edited August 15, 2007 by G-Money

[r32line]

Its not a matter of how much boost the factory BOV can handle its how much the factory turbo can handle.

The turbo's are ceramic and realistically, with a front mount the most boost you would want to run constantly is 13psi. But be warned that gauges are often inaccurate whereas a dyno will give you a real boost reading.

Running 13psi daily without a front mount can be done but you are quite likely to be reducing the life of your turbo and you should be turbo timing the car. Either way change your oil every 5,000km!

edit - Some people may be happy to run higher boost than this as a replacement turbo is not awfully expensive and it does present an opportunity to upgrade it, but to each his own.

Edited August 15, 2007 by r32line

[G-Money]

yeh having the gauges and timer installed as we speak.

do you have any recommendations for a turbo ugrade am looking for 200kw tops but also a fairly wallet friendly???

[mad082]

stock or highflowed r33 turbo

[joeyjoejoejuniorshabadoo]

You'll get close enough to 200 on the stocky...

just need a bunch of other shit.

turbo back exhaust, pod with cold air box, fmic, new computer or piggyback fuel doovalacky, 13 pounds and a good tuner

Edited August 15, 2007 by joeyjoejoejuniorshabadoo

[TTT]

I love budget builds..

1.) R34 stock side mounted intercooler = $150 + $50 to mod it so that the inlet and outlet match the stock R32 one.

2.) GTR fuel pump - $150

3.) Stock RB25 turbo - $400

4.) Xforce Mild steel, turbo back exhaust - $700

5.) TurboTech manual boost controller - $40

6.) Case of beer to CEFFIE from these forums to remap your stock ECU - $50

That will have you at about 190-200rwkw and will have cost you about $1500 - $2K

then you will need decent tyres and suspension setup to use the new found power.

[bubba]

My RB20 is making ~250rwhp @ 12psi untuned (but a bit lean due to old pump), currently has the following:

RB25 turbo - $300

3" front pipe - $30

"hiflow" 3" cat - $20

Greddy Profec B spec2 - was a b'day present but you can get them new for about $350-400 or you can fork out a little more for a blitz. I previously had a $30 turbotech boost T which worked fine.

Xforce split dump pipe (came with car)

2 3/4" cat back (came with car)

Chinaspec front mount (came with the car)

Got a Bosch 044 pump sitting here waiting to go in and have one of CEFFIE's remapped chips on the way. We'll see how that goes and might put an SAFC in to smooth things out a little more. Hoping to get close to 280rwhp with a little more boost out of this RB20 with minimal $_$ spent as I'd rather spend the big $_$ on an RB25 when the 20 finally dies

Keep an eye out on the forums, I picked up the "hiflow" cat, front pipe and turbo off local people from this forum

[abu]

ok just bought a r32 gtst 4 door my first turbo car, was just wondering a couple of things

1. what are the disadvantages of running higher boost without a front mount, will get one soon but don't have the coin atm

2. how much boost can the factory BOV handle ??

3. how much boost could i run with this stock set up???

any help would be appreciated

Get a FMIC setup, which is about $345 from JUST JAP, plus delivery.

Factory BOV is fine for what ever boost you want to run on the street. People are running up to 19psi on standard BOV.

I'd say no more than about 13 - 14psi on standard turbo.

That should be enough to have some fun, and reliably.

Dont forget to get a turbo back 3" exhaust as well, that will help with power/flow/response.

A GTR pump wouldnt be a bad investment either, I paid $60 for mine delivered, and it was in perfect working order.

Thanks,

Abu

Edited August 16, 2007 by abu

[dori34]

how much power can the auto rb20det gearbox's handle?

[Simon-S14]

how long is a piece of string?

generally 200 ish rwkw.. but like everything it all depends on how you drive!

I had 225 rwkw and drifted my 32 at every track event and no box failures. yert some mates of mine blow 20 boxes with organic clutches and 160 rwkw....

[G-Money]

thanx guys thats really helpful

[TTT]

you won't have any gearbox problems unless you drive fully sic all the fully time.

ther eare people with over 240rwkw with rb20 box still going strong.

[Kane_R32]

You'll get close enough to 200 on the stocky...

just need a bunch of other shit.

turbo back exhaust, pod with cold air box, fmic, new computer or piggyback fuel doovalacky, 13 pounds and a good tuner

Would SAFCII suffice as a "piggyback" I have all of the above inc. standard r33 turbo and stock ecu. Not to sure on power figure? Just wanting to see if it would be a cheaper alternative to going a PFC. Was thinking around 160rwkw

[djr81]

thanx guys thats really helpful

Generally there is a usefully large amount of gear that can be taken from either the RB25's or the 26's & fitted to the 20's.

Off the GT-R's fuel pumps have been mentioned (Got one for sale as it happens) but also injectors with suitable mods fit, as do the cams & if you are handy even GT-R intercoolers can be made to fit.

From the RB25's the turbo is the most usefull component, as mentioned.

Edited August 17, 2007 by djr81

[bubba]

25 turbo is the single best bang for buck upgrade you can do to the RB20. As for the gearbox, not sure about the auto's, I'm going to put a 25 engine in front of my 20 box and see how long it lasts. My mates 25/30 commodore was running a 20 box for about 6 months (because it had an RB20 in it before the 25/30) making 490rwhp, it eventually snapped 3rd gear in a big way.. loaded it up in 3rd from low revs and when it hit boost it went BANG! Depends on driving style I guess, I tend to abuse my cars a bit more than him

[abu]

Would SAFCII suffice as a "piggyback" I have all of the above inc. standard r33 turbo and stock ecu. Not to sure on power figure? Just wanting to see if it would be a cheaper alternative to going a PFC. Was thinking around 160rwkw

SAFC II is a piggy back fuel computer.

If your chasing about 210rwkw, then the SAFC II will do the job. Once you need to upgrade the stock injectors to after market, the SAFC II will becoming useless as they cant support after market injectors with a higher flow rating.

Around 200 - 220rwkw the stock injectors will max out on RB20. Thats a rough figure, as results on the forums vary.

With the following mods;

RB25 turbo

Intercooler

3" turbo back exhaust

GTR/WALBRO/BOSCH 040 fuel pump

SAFC II + tune

Power = 175 - 190rwkw

On about 14psi that should get you about 180rwkw, but you wouldn't want to push that stock RB25 turbo anymore, but if you were to, no more than 15 -16psi max.

You should be able to get 160rwkw on the above mods, running stock RB20 turbo.

I also bought an SAFC II for my R32, and have just purchased cooler piping and a cooler. Once my compliance gets done, I will buy an after market turbo depending on funds, if not then a RB25 turbo.

Already have a GTR fuel pump in there, so will install the SAFC II my self and get it tuned by something.. hoping for anything from 180 - 200rwkw depending on my turbo choice.

Thanks,

Abu

Edited August 17, 2007 by abu

[adam-__-]

You'll probably notice your stock bov start to leak at about 14psi. Just get a second hand GTR bov and put that in. Can handle more than you would probably want, but it just doesn't have the 'psshhh' sound some people want.

There's been a few people on these forums that have got over the 200rwkw mark with the stock rb20 injectors. It just all depends on the tune/tuner.