Recon My Rb25det Or Buy Rb26dett

[Roy]

Holy shit, thats very impressive. Who tuned it to get those kind of numbers on a stock bottem end?

Its running a 6 boost exhaust manifold with a 3540. It was tuned by Racepace and is running an RB26 inlet plenum...but is a std bottom end. Owner and tuner are laughing and taking bets on which side of the block the rods are going to come out of...as there are other plans for the engine when the RB25 lets go

[GTR-32U]

Put a 26 on an engine stand and build it up at in your own time. No stress.

I've got a good one for sale

best idea I have heard yet...At least you know what goes in, you can oversee all mods without some shonky billing you for parts that arent even there ( it happens ! )...and you can take your time about it , think about each modification step by step so your on top of it all

[PM-R33]

Its running a 6 boost exhaust manifold with a 3540. It was tuned by Racepace and is running an RB26 inlet plenum...but is a std bottom end. Owner and tuner are laughing and taking bets on which side of the block the rods are going to come out of...as there are other plans for the engine when the RB25 lets go

Crazy, never heard of a RB25 putting out that kind of power on a stock bottem end. Very impressed by that. Do you know how long roughly its been running that kind of power output for? I suppose it will have to let go one day, but to even last that long for a few dyno runs and a motorkhana shows very good tuning indeed.

[TTT]

there was a "longish" thread about some guy in the gong who was pushing the limits of a stock Rb25.

plates were LNEMUP or something.

anyway, he was making something over 500hp with over 100 dyno runs and shit until it eventually popped.

Roy - That video is awesome.

this the car?

http://au.youtube.com/watch?v=IWvHd3H6n2k&NR=1

[discopotato03]

Yes entertaining Roy , it does show what happens with more power than traction .

You mentioned that it uses a 6Boost manifold and a GT3582R .

I think Roys idea of improving the std engine is a better one given the costs involved . Its nice to have the RB26's features but its the way to go broke method for a bit of shove in a road car .

RB25's can be good things but they do need head work and mild cams . The std turbo will only go so far so HKS's GT Pro turbos probably make the best use of the std exhaust manifold and in kit form go bolt .

The trouble with exotic bits is that they are expensive and need a fair bit of customisation to fit up . The more factory engineering you can get away with the better off you are cost wise .

Also its only my opinion but I think the 400 odd ponies would drive a bit better with a GT3076R/GT3037 than a GT3582R , the turbine housings (Garretts anyway) look very similar and in mid A/R size I tend to think the torque delivery would follow the hoof a bit closer . My gut feeling is that the GT3037 Pro S in 0.87 A/R could go close enough to the red cars performance (with similar engine mods) the major difference being the exhaust manifold . You'd think it would pull up earlier and get to the wheel spin point a bit lower down the rev range - where with tuning you should be able to get it to the traction loss point and limit things to limit wheel spin . To me its a case of using 3/4 of the 3037's capacity rather than 2/3 of the 3582R's .

My vote goes to improving what you have , sometimes we all have to remember that having a budget doesn't necessarily mean using it all .

Another 2c spent , cheers A .

[waza]

Cheers guys ive decided to stay original and run with the 25 i agree with

discopotato03 about the budget thing keeping in mind im not going for crazy power levels.

just enough so i dont get s**t from my mates who have turb 4wd's

[R31Nismoid]

There is a particularly freakish RB25 in Vic at the moment making 360rwkws, it has survived countless dyno pulls and a motorkhana day, and will be doing Sandown in a few weeks. He is tryign to blow it up so learning the limits of a well tuned RB25

Oh it has its limits (stock RB25 parts), i found a couple