Safe Boost For #4 Gtr V-spec

[livewire]

Hi guys.

Dont shot me down for not doing a search cause i have but have come accross different findings.

I recently purchased an R34 GTR V-spec which has only 3" dump pipe-back exhaust, hks electronic boost controller. Im about fit a power FC and was just wondering what the stock turbos are capable of being boosted to as i have heard mixed comments. The boos controller was set to 90bar - low and 1.15bar - high. I noticed it actually peaked at 1.20 bar on high setting on the factory gauge on display screen so i have since turned it down to 1.00bar to be safe till i can get it on the dyno. Also, is there much gain in fitting a power fc using standard turbo's?? or am i better off waiting for aftermarket turbo's/injectors at least?

Any help would be great

Thanks

[maclarenf1]

Subscribing to this

i will be getting one hopefully soon and need to know also... the search function does throw very differing results in this category

My roaming around the forum was that 1 Bar is SAFE and Reliable boost to run, but some people run much much higher and have no issues with stock ceramic jobs

I think with Power FC, you can tune it so you get lot better Fuel economy, response and power delivery and just all around more refine feel to the mods as if they were done in factor

also if you can PM me the Price you paid for V-Spec, will be great

[DRD-00F]

My 33 GTST was about the same when I bought my PFC, and while it didn't add any power, I have to say, it's one of the best engine mods I've ever done

The car ran much smoother, was much more responsive, I would definately do it again.

As for the boost, I'm not really sure for GTRs. I ran a bar through my single turbo and it never had any problems

[R.3.2.G.T.R]

run em at 1bar as a safety measure, better than killing ur engine should the stock ceramic wheel fail at higher level, although having said that, they can also fail at 1bar, luck of the draw

not much getting a pfc tune if u are intending on upgrading other components in the near future as it will require a re-tune ($$$), and yes you will notice some difference with stock turbo and pfc tune as factory tune is rich

[R31Nismoid]

Sigh... Same as any other ceramic turbo GTR

12-14psi MAX.

Run more, run the risk of a dead motor. Simple as that.

And ECU - same again, every car benefits from a good tune. Outright power might not change but power delivery & so on will especially when paired with cam gears.

R34 GTR, R32/R33 = same shit. Same stuff applies for all.

[James_03]

I noticed it actually peaked at 1.20 bar on high setting on the factory gauge on display screen so i have since turned it down to 1.00bar to be safe till i can get it on the dyno

Whats getting it on the dyno going to do?

You should be running them at the factory boost level until you replace them, or as others have mentioned 1bar max. Just because others get away with 17-18 doesn't mean you will.

It's all too tempting to wind them up without doing the hard work first, but you pay for it dearly in the end.

[bubba]

Whats getting it on the dyno going to do?

I assume he wants to make sure it's not running lean with the extra boost..

[GTScotT]

Sigh... Same as any other ceramic turbo GTR

12-14psi MAX.

Run more, run the risk of a dead motor. Simple as that.

lol Ash, you of all people should know no number of threads or posts will ever over come the morons. You will always get SOMEONE saying "Ive run 1.5 bar no problem for a year straight" and up comes the new thread with everyone say YEAH YEAH 1.5 BAR!!

Such is teh forum. Make a 3 digit IQ part of the registration process

[snozzle]

i was hoping the '#4' in thread title was referring to something funnny like your 4th engine in the car due to not knowing wat boost to run.................. doh wasted my time reading this thread

edit: i actually might put some constructive input into this thread since you had atleast 1 decent question.

dont bother tuning your gtr if its running stock turbos at 12-14psi etc, especially if its just on 1 bar and especially if your planning to mod it and get it tuned again later on. I didnt notice a world of difference after my tune. Not the most effective way to spend 300-500 bucks. Yeah small difference but kinda felt like i shoulda waited out till i had bigger injectors to make the most of the tuning time vs end result

R33 gts-t's are a different story, the stock gtr ecus are no where near as bad. Wait out till you get new turbos, bigger injectors, cam gears and other such support mods.

Edited August 27, 2010 by snozzle

[livewire]

the whole idea of the post is to try find out how much boost they can handle so that i dont do any damage now and know what level to ask it to be tuned to on the dyno when i have power FC installed.

Whats getting it on the dyno going to do?

You should be running them at the factory boost level until you replace them, or as others have mentioned 1bar max. Just because others get away with 17-18 doesn't mean you will.

It's all too tempting to wind them up without doing the hard work first, but you pay for it dearly in the end.

[livewire]

What about these Rebuilt factory turbo's with N1 spec steel turbines and 360 degree thrust bearings etc you see on ebay? Anyone tried and can comment on them or know if there is much gain from them opposed to the standard specs being exactly the same size??

[R31Nismoid]

the whole idea of the post is to try find out how much boost they can handle so that i dont do any damage now and know what level to ask it to be tuned to on the dyno when i have power FC installed.

There are dozens of threads on this topic already.

What about these Rebuilt factory turbo's with N1 spec steel turbines and 360 degree thrust bearings etc you see on ebay? Anyone tried and can comment on them or know if there is much gain from them opposed to the standard specs being exactly the same size??

You have a ball bearing R34 GTR, and you want to put crappy N1, bush bearing rebuilds in?

cheap, nasty, dont go near it.

Ok for the tightass R32 GTR owner just trying not to have a motor die, you are better off with Garrett -9s or similar if you are going to change turbos.

And same again - these have been well covered if you take the time to have a 5min search. Thread on the exact product not even 2 weeks ago.

[choyda]

Agree with R31Nismoid. Did all the research and eventually stumbled on the Garrett -5's or -7's thread that also covers the -9's.

I personally went with the -5's for my goals but its a great read when you're ready to replace the stockers.

These are Garrett straight swaps for the factory turbo's and best value for money compared to the big Jap brands.

[livewire]

Ahhh i see. Got a link to the topic by any chance?

Agree with R31Nismoid. Did all the research and eventually stumbled on the Garrett -5's or -7's thread that also covers the -9's.

I personally went with the -5's for my goals but its a great read when you're ready to replace the stockers.

These are Garrett straight swaps for the factory turbo's and best value for money compared to the big Jap brands.

[Brandon]

Ahhh i see. Got a link to the topic by any chance?

http://www.skylinesaustralia.com/forums/7-...ts-t254450.html

This is a very popular topic. I'm suprised you actually missed it...

Anyway, anyone knows where would be the cheapest to get the garretts range of turbo? Or is Streeter still the way to go?

[choyda]

I got mine through Elite Racing Here and he was about $100 cheaper than everyone else. This was over a year ago though.

[Brandon]

I got mine through Elite Racing Here and he was about $100 cheaper than everyone else. This was over a year ago though.

Hmmm... I'll talk to Dan when the time comes then since he'll probably be installing anyway