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Rb29 Wow!

RPMGTR

By RPMGTR,
in Engines & Forced Induction

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N1GTR Grand Master

N1GTR

Posted
Posted
lol...where did you hear that you Wally?...im sure that was only in your mind.

Im talking about non-obtrusive, quiet, unasuming, but very powerful stock looking and sounding cars. I hate driving my car...even the small distance from the shed to home (and you know how close that is). This car i could have easily driven around in all bloody day.

i didn't throw that RB30 bottom end in the tip to regret it...it was exactly that...rubbish. :)

lol, ok ok

Shouldnt you be calling the tip for me soon? :(

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BoostdR Mentor

BoostdR

Posted
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Exactly....it makes 10+psi @ 2500, hence the big torque early.

Some more details:

Crank is a custom billet 12 counterbalance job. Don't try to rev those RB30 cranks too high!

Rods are SR20. Don't sweat the R/S ratio. 1.5-1.65 has proven to be ideal/desirable for a 4 valver in the 1-9000rpm range.

Modern materials and rod/piston designs mean longevity is not an issue, and shorter rod is a stronger,lighter rod.

Pistons are custom.

Camshafts are Nissan OEM.

Turbos are currently Garrett -5's, (about to make way for a very slightly bigger set).

We have now have it tuned at 24lb and it makes 468kw with plenty more through the mid-range.

I'll post a new dynograph when I get a chance.

Lots of sneaky tricks in this one. I probably shouldn't have sold it after all..... :)

cheers,

Garrett -5's and 468kw ??? this must have been on an engine dyno...right? :(

Was the crank originally an RD28?

VB- Veteran

VB-

Posted
Posted

i thought the limit of -5's was alot less? without being 100% familiar with 'dash fives', are they one specifc turbo, or are there different sizes? last GTR i saw running -5's was an R32, making ~425rwkw on 116 octane, and it appeared there was nothing more to give from the turbo side of things, unless there are bigger -5's?

Swiper the Fox Grand Master

Swiper the Fox

Posted
Posted (edited)
yes i envy this motor...

its power is like electricity...you cannot see it...you cannot hear it...you cannot smell it...but boy you can feel it.

Dave, Ron Harrop can help you out with a crank...he is in Melbourne.

Edited by DiRTgarage
BoostdR Mentor

BoostdR

Posted
Posted

They wouldn't make that power on pump fuel without some enlargerment. The compressors simply do not flow enough air. Hence why I asked if it was engine dyno'd....since the best engineering shops will only tune this way. Torque can be measured to .1 ft lb which gives a very very good indication of cylinder pressures.

I wouldn't be suprised to see that type of response on a 2.9 from modified -5's, baby cams help aswell

  • 1 month later...
JFKGTR Collaborator

JFKGTR

Posted
Posted (edited)
They wouldn't make that power on pump fuel without some enlargerment. The compressors simply do not flow enough air. Hence why I asked if it was engine dyno'd....since the best engineering shops will only tune this way. Torque can be measured to .1 ft lb which gives a very very good indication of cylinder pressures.

I wouldn't be suprised to see that type of response on a 2.9 from modified -5's, baby cams help aswell

Ben has tried more than 5 turbo combos on this engine alone, while logging temps and pressures.

You would be amazed at the power some of these little turbos can make.

As far as I know the turbos are off the shelf -5's.

.64 turbine housing.

I'm glad you assume the compressors wont make that much power.....apparently it is actually the turbine that is getting close to the flow limit.

Same turbos on a F355 Ferrari also make over 450kw @ wheels on only 16psi (different dyno).....

My own track car with 2.6 engine and -5's makes over 400kw @ wheels on pump.

This engine is the culmination of 8 years of Race Pace RB development.

It was built as a challenge for a stock appearing/mannered engine to have monster power and response.

In the last 12 months it has seen over 10,000km of road use and various track/tarmac rally events and is still going strong.

I want it!

Edited by JFKGTR
JFKGTR Collaborator

JFKGTR

Posted
Posted (edited)

Seeing as the car with this engine is for sale, I might as well spill some of the 'Ben's secret specs'

Custom billet crankshaft 84mm stroke

Custom titanium rods

Custom forged pistons 86.5mm bore

Custom chamber/port shape

Variable cam timing

12 injectors

Thats the basics, Im sure there are lots more tricks in there.

Edited by JFKGTR
Antimatter Experienced

Antimatter

Posted
Posted

I cant confirm it - but have heard rumour that the was some deal done too.

Something about soul and sold to the devil. My personal theroy is that he is the devil - or at least the dark son of rajab of RB's

On the subject of secrets - I want to know how he keeps his shirt so clean?

:)

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