trainwreck517

iTrader: (1)

I'm looking how to tell the difference between a S4 and S5 TII rear IRON plate apart.

If somone could post pictues of a S4 and S5 and point out what to look for I'd apreciate it alot.

Thanks for your time.

RotaryEvolution

iTrader: (30)

look at where the casting is near the rear upper dowel pin, the S5 casting is a bit larger and most have a rib heading up to the oil filter pedestal much like an S6 iron.

Turbo II-FB

can you mix them

trainwreck517

iTrader: (1)

Yes you can mix them.. but I want to use a S5 on my S5 motor.. as I already cracked iron at the dowel pin.. and well want to get a new iron before I swap it.. I have a S4.. but would like to use the S5 as it is stronger.

But yes you can use a S4 iron on a S5 block... but I do believe the port timing is a bit difference.. won't matter much if it is ported.

So Karack, The area were the o-ring hits iron at the dowel pin is larger in diameter correct?

RotaryEvolution

iTrader: (30)

yes, s4 has no overlap with the rotor housing, S5 has a bit of overlap where it meets the housing and S6 looks rather menacing with the overlap when it mates to the housing.