Changing To A Stock Rb26 After Forged Motor Died

[Stoney85]

Ok, recently my RB26 dropped a valve and destroyed the engine I had in my R34 GTT, was making over 500hp, probably closer to 600, but anyway, that engine lost a piston and the N1 block cracked.

I've sourced an R33 GTR motor to use for now to get my car up and running again.

I've got it sitting on an engine stand right now and just wanted to see what's people's views and opinions on what I should do before I fit it to my car.

Ok, from what I gather about the previous owner of the stock RB26 is that it had 100,000kms on a stock GTR, standard boost, and it was just serviced, he then built a new engine as a tax write off and put this on the shelf.

So I have a built rb26 that is destroyed sitting there and a stock 26 that's going to replace it for now.

I'll be detuning to suit, lower rev limit, less timing, less boost, but was thinking is it worth it to put the Nitto oil pump from the other motor in it?

What about the ext head drain oil kit?

I'll be bolting up the inlet setup and the exhaust - 6boost manifold, tial 60mm gate and a gt3582r.

And the larger 8L custom baffled sump too.

I was thinking of taking a main and big end off to inspect them, and replace if required which it shouldn't need hopefully.

What else should I do, I'm not really keen on stripping the motor, If I did I may as well just aource anothe JE piston, Along with fit the eagle rods and modded crank, rebuild the old head and be done with it.

I plan on doing that later to another block.

Ive read the nitto pump needs the restrictor put in the head oil feed gallery or its too much oil up there, if I'm only revving to say 7,500rpm, is a stock one sufficient for 300+kws or should I fit the nitto one along with the ext oil drain kit or will it still flood the head with oil?

Can you take a spring out to reduce the pressure?

[RB2600]

Depends on use I suppose, if its gonna be given hell then all the oil mods would be advised, the nitto pump flows 60ish lph from memory so that would empty out a stock sump quicker than a stock pump would, hence the need accompany it with the bigger sump and restrictor. Enlarged oil returns/external drain etc by that stage you've already got a decent amount apart and would be seem like a waste of time/labour/money to come back and install forged pistons and rods at a later date. If it's just a streeter then you should be able to get away with the stock motor and pump, wouldn't hurt to install the sump though.

The less revs the better.

Edit: nevermind, just saw now youre running a single. Regardless, if you want the motor to live, be sensible with the revs

Edited November 3, 2012 by RB2600

[Stoney85]

Gonna keep it stock for now, keep the revs to 7,500rpm, back the boost down a bit and see how it goes.

I figured if I don't rev the motor, the stock pump will be fine.

I'll keep all the good bits and build up an RB30 bottom end to suit my worked head and then throw that in at a much later stage.