Stroker R34 Gtr

[GTRNUR]

oh and in regards to the patrol pathfinder, etc block head combine, i was a bit off

you use the rb30 block, rb26 head and nissan Navara or pathfinder (forgot which one exactly, but a bit of google will surely ifnd it) pistons, conrods and crank.

they will make the engine to a 3.2 or 3.4l engine.

Care to elaborate on exactly how this "might" be possible? Larger pistons dont solve the problem of the block being thin in the bore. Fact is, you can not bore past 88mm with an RB block (all of them) before the cylinder thicknesses get below 2mm.

You can use that bore size if you wanted to grout fill the block as well, but thats not going to work for a street engine, as you would need to do a complete fill to get the strength in the block where it's needed (at the top 1-2" of the cylinder). Even then, an 88m bore is only 3.1lt anyway with an 85mm stroke.

Stroker crankshafts like the one that Spool are developing, combined with a sleeved block (to allow an 88mm bore) are about the only way you can get anywhere near 3.4lt.

3.2lt is easier to achieve. A 6" chevy rod with 1.88" big ends on an offset ground 87mm RB30 crank, with an 87.5mm piston will get you a 3.15lt. 87.5 is about as large as I've "read about" people running without sleeving (not my recommendation though). And you'd want to be dam sure about your tune, so you dont go splitting the thin bores. Having an engine that can only be tuned to 7/10ths is pretty pointless in my opinion.

[Bronx]

im not 100% on how it all got done, i didnt do it, the tuner doing my mates skyline did it, i will be going there tomorrow and ill see if i can get a couple of answers.

could be that conrods are shorter or pistons have a differnent top. in which case youll have really low compression but more litres. or even if the crank has a longer stroke/ turning circle. but ill ask him how the fkuk he did that all tomorrow.

since i havent done it i can only speak from word of mouth.

but on another note, i say buy a 24u block and keep your skyline a skyline not a hybrid "Commoline"

i know this thread is about the engine, but is there a car involved??? i kinda got lost after a while....

[Marlin]

Why are you still going?

[Bronx]

?

[CosworthSti]

Well I haven't bought the car yet, like I said it will definitely be within 1-2 weeks. I just need info on this because the Skyline hasn't got alot of forums around, they're either Japanese or in the UK. This site seems to be solid. I only want 3/3.1 litres but if 3.4 is possible then the more the merrier. However I do want the engine to keep that "RBness" about it.

[TurboDoseBro]

Take off the 2 turbos and replace with 2 superchargers.

[UWISSH!]

just buy the os giken 3.15 litre block problem solved

lets just hope u have deep pockets to mod the car as gtr's are expensive

[WHITER33GTS-T]

hay dude, whats this patrol block ur talking about, i think the old ones do run rb30's

mine will handle 1000hp and cost me 10k, how does the patrol block make it a 3.5litre, this is interesting...

Pretty sure the patrol block he means is the RD28 diesel block.

There is a 26/28 R33 in the latest Zoom mag with 937rwhp and has run a 8.3 @ 163mph

[N1GTR]

This thread gives me the shits, bigtime.

Buy the car. Take to someone who has done the rb30 conversion before who is local to you. Pay money. Done.

Mine is a 3L. Makes enough power to scare other built GTR owners. Still revs like an rb26, if you Fu(k it up it won't rev.

[NXTIME]

I agree Steve. This thread is almost a waste. Why would you want to buy an already well done 400kw R34 GTR [ACCESS] and then go for an RB30 stroker?

Anyway, don't waste your time, I am buying it as a daily driver.

[CosworthSti]

Where can I get the Giken 3.15 in NSW? Who build's 3.0 ltrs in NSW? I would be willing to take it another state for the build.

[elrodeo666]

Here...ouch !

http://www.otomoto.com.au/osgiken/RB30_race_engine.htm

[Huy]

Just out of curiousity, have you been in/driven any well sorted 2.6/2.8L GT-R's?

Seems like overkill for what you're going to be using the car for. I can see the $$ going down the sink already.

[Marlin]

This thread gives me the shits, bigtime.

Buy the car. Take to someone who has done the rb30 conversion before who is local to you. Pay money. Done.

Mine is a 3L. Makes enough power to scare other built GTR owners. Still revs like an rb26, if you Fu(k it up it won't rev.

Exactly Steve, thats why I popped my head in here..... but I gave up, too much cluelessness here for me.

[CosworthSti]

Holy **** that thing is EXPENSIVE. How is it made? Using the RB30?

How much can get for the stock RB26 in the car so I can sell it?

[bozodos]

not sure which Patrol motor you're referring to, RB30S (I have one) is an R31 motor with a carburettor (and 4wd sump, also takes ~6l oil). RB28 or TB42?

Try driving a reletively stock one IMO, then decide whether you want to go more displacement, or bigger turbos etc.

[CosworthSti]

I think I'll be getting the OS Giken 3.15 motor, it seems to be coming from a solid company and I calculated it, I could make it work into the budget. Now because this thing is so expensive I want the best tuner in the country. I would be willing to go interstate for a tune if its necessary. Does anyone know a good tuner with a good workshop?

[ezy_09s]

^^ Do some searching first.

[iplen]

If you are so concerned about displacement, get a Clubsport!!!

or alternatively:

M3 is 3.2 or 4.5 (?) if it's the V8

2.6x1.7 turbo multiplication as per motorsport regs = 4.42, so basically the RB26 is equivelant to an NA 4.4l, but is even easier to get HP out of. Seriously get the car, drive it for a bit, play with what you get then decide what you want to improve. if it is STRICTLY a road car what the F do you need more than 300hp for? even my stock R32 with a pair of -7s is quicker that all bar the top Porsches/Ferraris/Lambos etc to 100... The way you are talking I would personally be suggesting maybe this

[UWISSH!]

high octane racing sell the 3.15l block