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I have a chance for a set of '215 heads, same valve size as present '236(peanuts) I have 8.03:1 comp now, with 118 cc's. Will these, '215's give me any appreciable compression?
(seat of the pants feel) or is it to negligable and not worth the valve grind fees?:HMMM:
Fred
215 head were around 95 to 100 cc and bigger port then the small ovals . i do not know what cam you have in it so the small port heads may not be to bad . i would say with the 215 could be worth 25 hp just in the cr gain
Thanks Pat,
pretty mild build, Gross lift 510, Duration @.050, INT=218, EXH=224, Lobe Separation 110 467 cu in
Thanks for response Pat, this is a 467 cu in
Cam:(Hyd. Roller, Compcam XR270HR) gross valve lift .510, Duration @.050=INT>218, EXH> 224, Lobe separation=110
Fred
it should run good with what you have now . there is alot that can be done to get abit more out of the 215 casting as to what you have now hate to put a number on it but with a nice valve job and a few other things i would think over 35 hp over that you have now if you have a good exhaust . that was the head to use back in the early 80s alot of flat top 454 had them heads on them that was the first thing we did :) when you could buy them things all day for cheap. now there gold to the guy that wants numbers maching engineQuote:
Originally Posted by MaritimeMafia
35 Hp increase possible? Seat of the pants feel, you think? Thanks for the reply. I know its hard to estimate HP's but what increse with '215's with a
6-71 with 5#'s of boost, would this need a cam change?
MM
if the wheels are hooking up yes should feel it . cam would work ok for a blower
Pat, appreciate replies, take a shot at this.
I know its hard to estimate HP's but what increse with '215's with a
6-71 with 5#'s of boost, would this need a cam change?
MM
no like i said the cam is ok . now you taking about a blower ? with 215 heads then i would go up to a 11/32 valve stem 2.19 1.880 valves and how much hp under boost ? 550hp maybeQuote:
Originally Posted by MaritimeMafia
Pat, thanks for the responses, this sounds do-able money wise. Even if it hits 500 hp I'll feel it's money well placed. I will be watching your posts as you have a background of reason,not just a "keyboard jockey"!!!!
Larry
its going to be more then 500 and have some dyno time on some blown 650 hp bbc s it just not to that point but some were in the hi 500s is doable