ETP vs AFR
Originally Posted by ls1408cp
I think the fast 90 is only good till 550rwhp. I havent seen anyone past that it seems to be the norm.
https://ls1tech.com/forums/dynamometer-results-comparisons/244034-n-fms-408ci-dyno-video-577-rwhp.html
i think the reason why the etp heads arent making much, if at all, more power that the AFR's is because, the FAST manifold, it only flows 295-300 cfm, and its going to knock any kick *** head down to that level nearly. so whether its a AFR 225 or ETP 255, doesnt matter, it still only 300 cfm head through the FAST. your only as strong as your weakest link.
Originally Posted by MUSTANGEATER
Lee Mcintyre did 575 or so with a TH400 and LS6 heads with a FAST 90 MM. I think it's more about the porter than the casting, which is what some people are not seeing. I think it eventually did like 610 or something once he got it lined out. I also think JZ'sta owns that set of heads currently, although I may be wrong.
https://ls1tech.com/forums/showthread.php?t=244034
https://ls1tech.com/forums/showthread.php?t=244034
Originally Posted by RyneZ06
i think the reason why the etp heads arent making much, if at all, more power that the AFR's is because, the FAST manifold, it only flows 295-300 cfm, and its going to knock any kick *** head down to that level nearly. so whether its a AFR 225 or ETP 255, doesnt matter, it still only 300 cfm head through the FAST. your only as strong as your weakest link.
