PONTIAC SLP

iTrader: (3)

Hi , my cousin bought TFS 225 heads can he install the heads on LS1 bottom end ? because heads bore is 4.000 and the ls1 bore is 3.905

thanks in advance

CBIII

iTrader: (6)

short answer:no.

Brian Tooley Racing

iTrader: (13)

As long as you use a 4.0" bore gasket you'll be fine.

Don't forget that people use AFR 225's on 3.900" bore engines and they have a 4.100" bore chamber.

PONTIAC SLP

iTrader: (3)

can we mill the TFS 225 to 60 or 59 cc ?

CBIII

iTrader: (6)

what size valves? arent you running them too close to the walls?

Brian Tooley Racing

iTrader: (13)

Yep, no problem.

Not at all, the TFS 225's only have 2.055" and 1.570" valves, the AFR 225 for example are 2.080"/1.600".

john563

iTrader: (17)

I hate to hi jack but its along the lines with the op post:

Anyway what is the down side to running TFS 225 vs 215 on a 346 C.I.
Do you lose low end TQ by doing so?
I thought about moving up to Trickflos 215 but thought what happens when I move up in C.I then I'd regret not having the 225..So jsut curious how the 225 will respond on a 346 vs the 215 heads