Well my guy doing the 1/2 bridge on my motor just found out its an s4 motor. I went downstairs and weighed my rotors, sure enough 10.5#s. So I paid $1300 for a blown up ******* s4 peice of **** motor, that was suppose to be a fresh s5 motor. It did come with all s5 externals, and 1 busted rotor, 2 busted housings. Sweet! Hopefully he can find some s5 side irons.. S4 irons like to break around 400rwhp.. https://www.nopistons.com/forums/pub...IR#>/angry.png

hmm i keep thinking my engine is s4.



what turbo did s5s have? ht18 or hx18?



kevin.

It had a bnr stage 3, s5 hyrbid/s5 exahust manifold

Is there really a differnce in s4 and s5 irons...........I cant see any difference.



The port size is the same........are S5 thicker around the oil filler or something? Just wondering cuz I recentley blew a S4 around the dowel pin on the rear.

s5 irons are reinforced on the rear iron around the dowel pin near the oil pedestal. Front iron is also reinforced.

no i mean stock turbos on the s4 and s5 were what? cause i have a turbo from my engine that was stock and would help me figure out what engine i have./



kevin.

Well I guess Jim will no longer be the only one with an FD motor in his FC. Its on... https://www.nopistons.com/forums/pub...IR#>/smile.png

Stock turbos on ALL FC's were Hitachi HT182S-S.



Only thing that changed with the S5's were a different exhaust housing.

That is all.

no ... s4 were hx18









and....el im using s4 housings on my s5 engine....

rotor housings? That doesn't matter. I will be using my current s4 rotor housings. But then again you aren't aiming for 550rwhp+...