sbf2

hi guys want to know how much hp difference will be between TEA stage 2-243 ported heads vs tfs 235 or 245 heads on a 402-416 bottom end.cam will be the btr nos stroker cam with super vic intake and 4150 tb.my buddy gave me the 243s for free is it worth switching to aftermarket heads

Mavn

iTrader: (3)

My 416 gained 80 rwhp going from ported 243's to PRC 247's. Same Dyno, same tuner. only change was heads.

-Mavn

sbf2

who ported your 243 heads

Mavn

iTrader: (3)

PRC stage 2.5's

sbf2

something must of been wrong with the stock ported heads getting 80rwhp going from a stock head is impossible 50 understandable from stock but not from a well ported stock head

Mavn

iTrader: (3)

Very Very false.

Going from a 2.02 intake valve that's only 220ccs to a 247cc runner with a 2.120 valve . way more air, way more velocity, way more everything.
also went up .7 in compression with a smaller chamber .

Made 507 with the 243's

,made 585 with the 247's.