LS1TECH - Camaro and Firebird Forum Discussion

LS1TECH - Camaro and Firebird Forum Discussion (https://ls1tech.com/forums/)

- Generation III Internal Engine (https://ls1tech.com/forums/generation-iii-internal-engine-5/)

- - Ported 853's (https://ls1tech.com/forums/generation-iii-internal-engine/1407681-ported-853s.html)

pelon16787

Apr 6, 2011 02:08 PM

Ported 853's

I have a fully built 347 with a Trex cam, Super Victor, 850 proform DP. I wanted to know how much horsepower I'm leaving on the table with a set of ported 853s, rather than a set of AFR's.. I have this in a Sand Drag truck btw with a Turbo 350 and a 4000 stall converter. Just wanted to hear your guys opinions Thanks!

PREDATOR-Z

Apr 6, 2011 05:19 PM

15>20 Hp

bww3588

Apr 6, 2011 05:52 PM

atleast....

depends on who ported them...

old man river who has been "porting" heads for years, probably closer to 30+

a set of TEA or PRC ported heads, probably 15-20hp.

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