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View Poll Results: -7 or -5 turbos?
-5 for power - gimme gimme gimme! 141 58.26%
-7 for spool-up - it's a street car after all! 101 41.74%
Voters: 242. You may not vote on this poll

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Old 11th October 2008, 08:48 PM   #121 (permalink)
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Would be about that.

I can post a pic of the dyno sheet if anyone is interested?
Yes please
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Old 11th October 2008, 11:40 PM   #122 (permalink)
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Here is the Dyno sheet for the car.

514 hp, 451 lpft at all 4 wheels on a Dynapack Hub Dyno.

It runs GT -5's at 20psi and Tomei Pon cams, Has been set up for low/mid response, at the sacrifice of top end power, But I'm only running 550cc Injectors and in tank pump....So don't want to push it much more.

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Old 19th November 2008, 05:22 PM   #123 (permalink)
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Nice lines

Have you thought about Methanol injection ?
Say add 10% water to drive the turbo sooner and farther up the range ? This is my next project, And a pair of Dash 10's
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Old 22nd November 2008, 11:22 PM   #124 (permalink)
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Would love to get a V-Cam so the car has a better fuel curve on cruise....but at the drug money HKS want for it...not at the moment
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Old 3rd January 2009, 02:38 AM   #125 (permalink)
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The -9's are my pick over the -7's.

The -9's with the optional 0.84 AR turbine housing would be very interesting on a cammed up or larger capacity motor. The turbine flow map on the -9's show the massive flow increase.

One of the guys over on SAU has just engine dyno'd his RB30DETT with the -5's and the 0.84 housings and it's very impressive with rather low boost at the initial stage.

The only down side is the need to make some custom dumps for the 0.84 housing (SR20 style flange) Not real expensive though.
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Old 30th March 2009, 09:29 AM   #126 (permalink)
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I run GTSS's (-9s) with tomei type B poncams, 436 rear wheel horsepower at 16 psi, full boost by 3,300, I reckon for a stock bottom end 26, you cannot go past the 9's, perfect compromise between power and response
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Old 27th April 2009, 11:58 AM   #127 (permalink)
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Excel graph comparing stocks to -5s

My Bolt On Engine Upgrade Thread: R34 Gtr - Skylines Australia
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Old 29th April 2009, 06:37 AM   #128 (permalink)
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One of the guys over on SAU has just engine dyno'd his RB30DETT with the -5's and the 0.84 housings and it's very impressive with rather low boost at the initial stage.

The only down side is the need to make some custom dumps for the 0.84 housing (SR20 style flange) Not real expensive though.
which guy was this from sau?
i too was looking at the larger rear housings but definitely not appropriate for the larger -10's
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Old 14th June 2009, 02:04 PM   #129 (permalink)
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which guy was this from sau?
i too was looking at the larger rear housings but definitely not appropriate for the larger -10's
I know the racepace rb29 had these with vct, on a rb26 + spacer.
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Old 15th June 2009, 12:14 AM   #130 (permalink)
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I know the racepace rb29 had these with vct, on a rb26 + spacer.
what spacers are u referring to?
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Old 15th June 2009, 02:06 AM   #131 (permalink)
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what spacers are u referring to?
Think OS Giken 3L. It was a RB26 with a 20mm spacer. (OS30 has 30mm which is works out same as RB30 bottom end)

Posting the thread for others, I see you found it
http://www.skylinesaustralia.com/for...6.html&hl=rb29
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Old 15th June 2009, 02:12 AM   #132 (permalink)
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fair enough - OS30 uses a 20mm or 30mm spacer?
i ahve the rb30 in my gtr, total increase in height was 38mm
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Old 25th June 2009, 03:34 AM   #133 (permalink)
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what cams are good for the -5s?

im looking for response and tourqe and low revs
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Old 25th June 2009, 05:07 AM   #134 (permalink)
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what cams are good for the -5s?

im looking for response and tourqe and low revs
Tomei PonCam 260's
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Old 21st March 2010, 10:53 AM   #135 (permalink)
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Here is the Dyno sheet for the car.

514 hp, 451 lpft at all 4 wheels on a Dynapack Hub Dyno.

It runs GT -5's at 20psi and Tomei Pon cams, Has been set up for low/mid response, at the sacrifice of top end power, But I'm only running 550cc Injectors and in tank pump....So don't want to push it much more.

how is that possible on 550 cc injectors ? im running around 500 whp and on the absolute limit of 660 densos with base pressure at 3.5 bar aswell.
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Old 21st March 2010, 11:05 AM   #136 (permalink)
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how is that possible on 550 cc injectors ? im running around 500 whp and on the absolute limit of 660 densos with base pressure at 3.5 bar aswell.
Leaner tune I'd imagine
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Old 21st March 2010, 11:21 AM   #137 (permalink)
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Leaner tune I'd imagine
but how lean can it be im at 11.4 at the limiter, surely he cant be much above 12 ? i just dont see how 514 awhp is possible, thats 600hp+ on 550cc, possibly an optimistic dyno ?
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Old 21st March 2010, 08:22 PM   #138 (permalink)
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but how lean can it be im at 11.4 at the limiter, surely he cant be much above 12 ? i just dont see how 514 awhp is possible, thats 600hp+ on 550cc, possibly an optimistic dyno ?
It's a Dynapack (Hub Dyno) so no, not optimistic at all, One of the most accurate dyno's on the planet!

I am running a fair wack of fuel pressure on a big pump.....It is getting very high in injector duty and I do need to replace them with some 700's.

....Gibson GTR's were 740hp in quali trim with 550cc injectors....
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Old 3rd April 2010, 05:58 PM   #139 (permalink)
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Personally I think it has to be 5s

Just over 500 at the hubs (abbey) at 1.5 bar with more if I want to do some headwork . This is with tomei cams 700 injectors an Fcon V pro gold (no afms) and a good map
highest boost tried was 1.5 bar but even at 1.3 its pretty interesting

What I like most about 5s is the torque - nearly 500 ft lbs at 4500rpm (well 488) and it stays there.

Dont think sevens will produce that



Not bad for an estate car
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Old 3rd April 2010, 09:19 PM   #140 (permalink)
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Personally I think it has to be 5s

Just over 500 at the hubs (abbey) at 1.5 bar with more if I want to do some headwork . This is with tomei cams 700 injectors an Fcon V pro gold (no afms) and a good map
highest boost tried was 1.5 bar but even at 1.3 its pretty interesting

What I like most about 5s is the torque - nearly 500 ft lbs at 4500rpm (well 488) and it stays there.

Dont think sevens will produce that



Not bad for an estate car
That is very similar to mine, same turbos and cams, on the same dyno....

....You are just running more sensible injectors!
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