Rb29 Wow!

[R31Nismoid]

  Cerbera said:

after that us 2.6l are all over you like a fat kid on a cupcake

umm not really, a car with that much average power would be so much further down the road you'd best be reaching for the bino's

[BBGTR]

Damn it, I knew I shouldn't have put that $30k in the market.....

[Lithium]

  Cerbera said:

you can have your 2.9l but who really needs power under 4000rpm in a gtr

after that us 2.6l are all over you like a fat kid on a cupcake lag is fun and is fixed by a clutch kick haha

You obviously missed the 9000rpm rev limit bit. Anything you can do with 2.6litres, you can do better with 2.9

[R338OY]

Impressive. Makes me wonder why Nissan didn't make these themselves. Like an RB30 with the anger of an RB26.

Congrats.

[rb26s13]

i'd like more info on where i can get one of these cranks that'll handle those sorta revs..

[Swiper the Fox]

  rb26s13 said:

i'd like more info on where i can get one of these cranks that'll handle those sorta revs..

i think you will find its probably an off the shelf jap full counter jobbie as Lithium suggested.

Id really like to see that torque graph with a more "realistic" scale. As it will show what Ben has achieved in a better light.

[rb26s13]

  DiRTgarage said:

i think you will find its probably an off the shelf jap full counter jobbie as Lithium suggested.

Id really like to see that torque graph with a more "realistic" scale. As it will show what Ben has achieved in a better light.

was also thinking that.. but who makes one which works out to be 2.9litre?

time to start planning wat i wanna do to new gtr

[Roy]

Apexi made an RB26 2.9L kit but my money is on the fact that it still runs a std Nissan crank, most likely the RB30 crank and block. But like anything, its no one ingredient that gets you these sorts of results. Its probably a combination of displacement, turbo selection, tuning, cam size and engine building and custom tweakineg from hours of R&D....all topped off with a tune that allows for what has been screwed into the motor.

Having gawked at the motor i have a few ideas of what is going on in there, but none of them are that informed, just a few educated and of course inevitable guesses. Which i wont bother to speculate about as they probably hold as much water as the story a "guy" at the track was telling me about how the Racepace inlet manifold made the inlet air travel in a vortex that accelerates and cools the air into the combustion chamber colder then ambient temps

[Swiper the Fox]

  Roy said:

Apexi made an RB26 2.9L kit but my money is on the fact that it still runs a std Nissan crank, most likely the RB30 crank and block. But like anything, its no one ingredient that gets you these sorts of results. Its probably a combination of displacement, turbo selection, tuning, cam size and engine building snf custom tweakign from hours of R&D....all topped off with a tune that allows for what has been screwed into the motor.

Excellent post

[Merli]

So........ When are you moving the RacePace workshop upto Sydney? Much nicer than hanging out with those smelly Victorians!

[R31Nismoid]

lol - if he moves to Sydney all the cars will start getting SBS (Sump Baffle Syndrome) that you blokes get up there far too often

[N1GTR]

  Lithium said:

Anything you can do with 2.6litres, you can do better with 2.9

Well said

  R338OY said:

Impressive. Makes me wonder why Nissan didn't make these themselves. Like an RB30 with the anger of an RB26.

Congrats.

Group a rules

  R31Nismoid said:

lol - if he moves to Sydney all the cars will start getting SBS (Sump Baffle Syndrome) that you blokes get up there far too often

Hahaha, not all of us

[archie01]

  Merli said:

So........ When are you moving the RacePace workshop upto Sydney? Much nicer than hanging out with those smelly Victorians!

Much easier to courier an RB29 to Sydney

[Lithium]

Well Racepace have managed to effectively bait our breath, whats the story?? Is this a setup we'll be able to be told about or pay money for to get it for ourselves? Would be VERY interesting to see that car run on a hub dyno showing boost and rpm

[Bass Junky]

Lithius,

I'm sure if you took your car to Benno and said "Give me that package" he would more than happily perform the required work to the car.

As for telling you how to do it yourself, I think you have got very little chance.

Ben has been developing RB engines for years and years and years. And that knowledge is the basis for his business.

[Roy]

I have been binning GTSts for a few years now. Anyone see an income stream from this undervalued talent?

[Beer Baron]

definitely move to sydney benno. merli's bill alone will keep you in business for a fair while. I'm a bit of a tight arse but have been known to break out the odd dollar too.

[Beer Baron]

  N1GTR said:

Hahaha, not all of us

ummm steve. spun bearing.... oily car. remember that day...... teeheee.

[Sydneykid]

My guess;

RB26 block (N1 perhaps)

87 mm bore (a good block will take 1 mm over no problems)

82.7 mm stroke (via any one of the forged cranks around, HKS, Trust Tomei etc) Could be tricky and save money by using an offset grind on the RB27 crank, but it is unlikely that it would take the rpm.

~120 mm rod (standard RB26 length as they are easily obtainable from a number of sources).

~4 mm raised gudgeon pin height (over standard RB26) pistons

I eliminated the RB30 block, some people don't like the requirement for a 4wd adaptor plate

I also eliminated the block spacer and liners, OS Giken style, as you wouldn't bother with RB29.5 when you can have RB31.

With the 8,000 rpm top end power the cams would need to be 272'ish maybe 280'ish on the exhaust, depends on the size of the exhaust valves used. Lots of lift, around 10.5mm or so.

That would facilitate some compression, say around 9 to 1, which would help achieve the nice power curve

Turbos, that's tough, GTRS (or a Garrett equivalent) would seem logical it has about the right power for them.

Then it's tuning, tuning, tuning

Them's my guesses.

Cheers

Gary

[Snowman]

Nice work Gary. I'm pretty sure a lot of that is wrong though. Except for the last bit.

But then the only person who really knows is the big fella. Even then I'm not 100% convinced he even remembers what has been done. Because every time he's done something to the car I've returned to find he's pulled it all apart again. LOL