R32 Gtr. What Boost?

[T-Rex]

Hi guys, I have been doing a lot of reading over the last few days on these forums as i need to learn more about the RB26 since im coming from an EJ20 My 1994 R32 GTR is running 22.5psi with 2860-7's (making 325kw @20psi). Now i see a lot of internally stock engine setups are only running 16-20psi. Do you think there is any danger running 22.5psi using stock pistons/rods etc? The car has ARP head studs and a cometic steel gasket, obviously to help with the higher boost, but how will the internals hold up (no track work with the car)? The cylinder head was reconditioned recently (not by me) but as far as i know the bottom end is stock.

More info on my setup is:

Power FC (of course!)

Bosch 044 pump

Bigger injectors (unknown size)

Twin 2860-7's

Dump pipes

3" into 3.5" exhaust

Steel Head Gasket, Studs, etc

Adjustable cam gears

The car is absolutely crazy on 22psi and in this wet weather will happily spin the rears to over 150km/h in 3rd Quite fun (and SCARY indeed!)

Cheers,

Shaun

[Adriano]

Its the ring lands that will let go, usually on cylinder 6 or 5

[T-Rex]

So you would recommend lowering the boost? It has a setting at 19.5psi but i feel that is probably a little high also? In the end it depends how i drive it i guess. Future plans are to put forged pistons and some better rods in it. Just so it can handle 330kw without letting go on some random occasion.

[R31Nismoid]

Well its your own choice.

Lower it if you are worried and cant afford a rebuild right away

Or leave it

It'll fail eventually so i wouldnt worry too much, just wether you want it to happen sooner or later

[T-Rex]

Lower it is then Definitely dont want it failing just yet, it can wait until after i buy a house! I like the idea of the RB30 bottom ends, but i don't like the idea of tossers saying i have a VL engine in my skyline! I think i will stick to the RB26. Something like 250kw at 4500rpm or so is pretty good for a street car!