Someone In Sydney With 2860-5's On A Gtr

[Mick_o]

340kw on -7's?!

[asps91]

It's possible on e85

[GOD12A]

e85 or 98?

98 on stock rods/pistons/head (with Tomei PonCams)

Mark

[asps91]

What type of poncams?

[GOD12A]

Hey guys,

Tomei Poncam Type-B

Check my other post for more info on the build:

http://www.skylinesaustralia.com/forums/topic/93880-rb26-turbo-upgrade-all-dyno-results/?p=7142672

Mark

[R34Liner]

340kw on -7's?!

It's possible on e85

They are supposed to make about the 310~320 mark on 98 at their absolute maximum (as in, probably shouldn't be running them that high)

On E85... 340 could be achievable but I don't know how maintainable it would be... Could be a happy dyno

Back on topic though... I would be interested in finding out how you find the -5's... I have -7's in my car from factory and I think one of them has busted an oil seal... blowing a lot of white smoke under heavy boost. I will be taking them out soon and checking them out and seeing if they are worth rebuilding or upgrading to a -9 or a -5

[GOD12A]

Heya R34 LINER,

I'm curious to know where did you get your info regarding the max power achievable with the -7s as there's a heap of variables involved!

Dyno was a DynoDynamics in Standard shootout mode (6F with standard 15kph/sec ramp rate), so the number should be pretty reliable.

Mark

[R34Liner]

Hey GOD12A,

Unfortunately the info about the 310-320 number is purely off the many threads and information that I have obtained from mechanics/tuners and owners. This is the number that averages out most commonly and I haven't found any other consistent information that suggests to me otherwise. I should have clarified that that number is maximum for what you would hope to call a safe level? I have no doubt you could wind them up further but I doubt they would last long enough to call them reliable? The comment on the Dyno is just an example of 1 of the many variables as you stated. I have no doubt other people have other experiences that contradict what I have found along the way and I can't claim any of this data is first hand from my own build. I can only base it on what I have found so far. If you have your own experiences that contradict what I have found so far I am more then happy to hear it seeing how I am in a position to either keep or upgrade my current -7's I would be very interested to hear...

Cheers,
Aron

[GOD12A]

Heya R34LINER

I'm confident to push the turbos till they stop making power, as long as they have a clean oil and coolant supply with no objects thrown in the compressor cover, they should hold together!

We tuned up to 21psi and didn't find the turbos to be any restriction. We only stopped winding boost into her as the Haltech internal MAP sensor maxes out at 1.5bar (22psi) and I have no interest in a 3bar sensor as it'll tempt me to see how far she'll go (likely ending up with the OE bottom end destroying itself!)

The current power output is fun and thrashable for now, so no use pushing the limits just yet

Mark

[R34Liner]

Now that is interesting...

So just to clarify, how much power are you getting at the wheels? What other supporting mods? (obviously Injectors and Fuel pump but did you go d-jetro or bigger AFM's?)

[levinboy]

I have -9s making 350kw atw at 20-21psi on 98 more in it but limited by 98

[GOD12A]

Heya R34LINER,

340rwkw

OE fuel pump, 550 injectors, Haltech Platinum Pro (MAP, so no AFMs)

Check my other post for more info on the build:

http://www.skylinesaustralia.com/forums/topic/93880-rb26-turbo-upgrade-all-dyno-results/?p=7142672

Mark

[R34Liner]

Heya R34LINER,

340rwkw

OE fuel pump, 550 injectors, Haltech Platinum Pro (MAP, so no AFMs)

Mark

very nice, will look into it now!

[R34Liner]

I have -9s making 350kw atw at 20-21psi on 98 more in it but limited by 98

That is very good to know, I like the idea of not running my turbo's anywhere near 100%

[Piggaz]

That is very good to know, I like the idea of not running my turbo's anywhere near 100%

They're cheap enough. Run them hard and if they pop, buy more.

[R34Liner]

hey're cheap enough. Run them hard and if they pop, buy more.

Yea for me its the taking them in and out that is pain in the arse trying to do it in the engine apparently is a nightmare and the only other option is to take the engine out soooo rock and a hard place...

[asps91]

Meh, just pay someone to do it. I am

[GOD12A]

Heya guys,

If you're looking for someone to swap turbos in Sydney who understands performance, drop me a PM

Mark

[Piggaz]

OP, if it were me (with a standard bottom end), I'd be putting -9's on it, pegging it at 23 psi or so and make a responsive 340-350 on E85 - seeing that you're going down the E85 route anyway. The car will have much more area under the curve than a -5 car. I really think -5's on a 2.6 are still a bees dick too big. They really need a stroker.

I'd offer my own car up for a drive but my box is

deaded and its not really a fair comparison to what you're going to get with a stock engine.

[SiR_RB]

If his got the -5 already keep em for future mods when u go forged rebuild and want 400+ kw