MUSTANGEATER

iTrader: (10)

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/dynamometer-results-comparisons/244034-n-fms-408ci-dyno-video-577-rwhp.html

Ryne @ CMS

iTrader: (10)

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.

ls1408cp

iTrader: (37)

well let me change what i said. 550rwhp on a street car pump gas non solid roller. I prefer to keep my o2s alive and drive on the street like most. You can get alot of power out of on high compression huge cams and vaccum pumps but i perfer the street. just my 2 cents

beardWS6

iTrader: (1)

RyneZO6 is correct. The fast 90 is my weakest link. I`m working on solving this problem now.

kpforce1

iTrader: (9)

Thats why you guys need to get a harrop hurricane intake... or any Individual runner/TB intake all the way baby! lol