Does anybody know what the intake port volumes are for the stage 2 street eliminator and stage 2 track eliminator heads?
Thanks Brien. Geez, none of you hard-core guys has ever compared the two? Someone I trust said they are close, but was curious if anybody has the actual numbers.
Adam FYI doesn't realy reflect track or street eliminators just for referance. realy depends how and what port works been done . Buick Head Specs intake port cc's exh port cc's comb chamber cc's TA Stg 4 Alum 252 108.5 57 width 1.46 hieght 2.265 TA Stg 3 Alum (Modified high port stg 2) 248 101 70 TA Stg 2 Alum (old) 210 102 73 Ported Iron Stg1 70
Dave, Thanks for the information!!! Do you have any idea why the Stage 4 exhaust is 6 to 7 cc's larger than the Stage 2 or 3? Adam, I have checked my Street Eliminator Stage 2 heads that were converted to the high ports and after porting they were at 248 cc's on the intake side. Thanks
John Port shape , valve size and design , stem dia , % opening etc. etc. it's a stack up . I don't think it's a good measurment head to head , too many variables (just referance) more important port to port .
Thanks Dave and John. I've been curious about the difference for considering any loss in low RPM power due to loss in port velocity. I am wondering if there is any downside to running the Track Eliminators on a 241 duration cammed street engine. 4000 RPM converter, 3.73's, so not exactly a grocery getter any more. I do drive it lots of miles though since I have a lockup converter. I am thinking with my combo, thre won't be any noticeable difference except maybe on the top-end.
I don't feel there is any downsize on the 455 in a slightly larger port, remember, the ports on these heads are small for the size of the engine. Port velocity on a Buick in my opinion is not much of an issue. We are talking about heads here that (speaking of the alum heads) are comparable to a good after market small block chevy head, now on 350 cubes, port velocity with this sized port is somewhat of an issue, with the extra 100 plus cubic inches we have in the Buick, believe me, there is plenty of port velocity. I have had the recne t oportunity to dyno some stout small block chevy engines here with good after market heads, and the results have been very good, however, the 455 Buick still makes way better torque at a lower rpm tha the chevy stuff, hence , more power down lower where you really ned it and wantr it in a heavy Buick. Jim Burek P.A.E. ENTERPRISES
thanks for the added info Jim! I should have listened to the first advice, which is pretty much the same as what you said.
