Which Pistons And Rods To Use: Rb26

[rb26stagea]

Hi Guys,

Since I lunched 2 pistons on the dyno, I'm up for fresh internals.

I'm not going for anything too crazy: the car was running about 420awhp on N1 turbos, before the rear turbo let go.

Since then, I fitted stainless exhaust manifolds, Greddy inlet kit, Z32 afms and HKS GTSS turbos. It was during tuning this setup that the engine let go. Luckily, the head remained undamaged, and the block is still in good condition. Given the smallish sizeof the new turbos, I'm looking for early spoo-lup, and a nice healthy chunk of midrange torque: outright power isn't a major concern. The car is never tracked (I'm unable to due to medical issues),so is 100% street driven.

I'm looking for advice from those with experience on what brands of piston and rods to use, as there seem to be a million different opinions out there, and I have very little experience/knowledge with built engines/internals. I want to keep costs reasonable, but want something that I can rely on to last.

Any help would be appreciated: I figure some of you guys would have seen a bunch of the good/bad/ugly, and its your advice I'm after!

[GTR260]

For that amount of hp spool rods and cp pistons will b plenty reliable. Not badly priced either! You can get a rebuild kit, see the link

http://www.spoolimports.com/spool-engine-rebuild-kits/nissan-rb26dett-rebuild-kit

If ur chasing big power u can't go past nitto

Edited November 23, 2012 by GTR260

[MrStabby]

If the stock rods are still good, just prep and re-use them. They're good for way more than N1s can make. IIRC Paul Diemar was using them in his drag car at ~440awkw.

[rb26stagea]

Cheers guys. I have more questions:

At the 600+HP we're planning, there has been some concern that my N1 oil pump won't be up to the job: is this a realistic concern? I'm happy to replace it, but am trying to keep the rebuild costs reasonable, so limiting unnecessary spending...

Also, at this power level, will the crank need to be nitrided? Once again, this is something that I have heard, but am not sure if it is overkill on a mildly modified engine...

[GTRsean]

Get some billet oil pump gears and stuff them in the stock housing...sorted.

Stock rods could do with ARP rod bolts and resize the big end and check little end. By the time you add it up you may as well go a set of brand new H beams...

Crank is nitrided from factory so is usually good to go as is, just check, grubscrew and balance.

Built Sloane's 32GTRB26 with CP pistons and nitto h beams, puts out 370RWKW and will take more

My 32GTR I had built: ACL forgies and spool H beams, just pick your bits and go!!!

[rb26stagea]

cheers for that: getting sick of waiting: can't wait to get the old girl back on the road: haven't driven her since July when the PWR radiator disintegrated...

[DaanGTR]

I have very good experience with Wiseco, that I used in two RB26 engines. I don't recommend Cosworth, had two sets, and both sets had issue with cracking rings.

Edited November 29, 2012 by DaanGTR

[rb26stagea]

Cheers guys: looks like it cp pistons, and probably spool rods, arp bearings and studs, 1.5mm oil restrictor, then slap it all together, and hope it doesn't grenade on the dyno this time...

Seriously though, thanks to all for your valuable advice: very much appreciated. I'll let you all know how it goes once its built and tuned...

[MrStabby]

Stock rods could do with ARP rod bolts and resize the big end and check little end. By the time you add it up you may as well go a set of brand new H beams...

I've heard some of the chinese made rods also need checking/finishing as the tolerances can be a bit sloppy. Does that sound right?