paintshopgaz

Just put together my 2.5 i opted for just fitting forged Cp pistons and left the rods as standard as i didnt fancy splitting the block!

What is a reasonable level of torque / hp to run without risking one of the rods letting go? I also have fitted Arp Head bolts, cometic head gasket and sti 3 heads. thanks in advance gaz.

Also what would be a safe rev limit??

renno rannes

7000rpm and up to 450 I reckon. There are people running more but I wouldent go past that on my block, Ive the exact same bottom end with CP Pistons and running it at 413bhp and 420lbs.

Renno

banny sti

iTrader: (68)

I have some Eagle rods to fit engine, if you want to push further.

paintshopgaz

is that the general view then 450/450 with a 7k rev limit??

Andy.F

Seems about right to me. I have taken my one up to P480/T550 but don't run it like this on a daily basis, usually on the lower of the 2 boost settings which is approx 450/450.

I did have a customer who ran std rods at 500/500 and 8000rpm......... for 3 laps of a sprint circuit before it bent a rod, lucky escape as it never caused any further damage !

paintshopgaz

Very lucky! Thanks for that andy put my mind at rest! 400 - 450 should be plenty for me..

Jay m A

iTrader: (2)

I've got a 7.5k limit on mine, although I've never hit it and most I've seen on the commander is 7k2.

However power is approx 330 at circa 6k on OE pistons