Thread: BBC head change
-
03-03-2013 12:50 PM #1
BBC head change
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?
FredLast edited by MaritimeMafia; 03-03-2013 at 12:55 PM. Reason: wrong forum, newbie adm, move if possible to engine talk
-
Advertising
- Google Adsense
- REGISTERED USERS DO NOT SEE THIS AD
-
03-03-2013 03:58 PM #2
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 gainIrish Diplomacy ..the ability to tell someone to go to Hell ,,So that they will look forward to to the trip
-
03-03-2013 04:44 PM #3
Thanks Pat,
pretty mild build, Gross lift 510, Duration @.050, INT=218, EXH=224, Lobe Separation 110 467 cu in
-
03-04-2013 07:14 AM #4
Thanks for response Pat, this is a 467 cu in
CamHyd. Roller, Compcam XR270HR) gross valve lift .510, Duration @.050=INT>218, EXH> 224, Lobe separation=110
Fred
-
03-04-2013 05:02 PM #5
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 engineLast edited by pat mccarthy; 03-04-2013 at 05:04 PM.
Irish Diplomacy ..the ability to tell someone to go to Hell ,,So that they will look forward to to the trip
-
03-05-2013 07:10 AM #6
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
-
03-05-2013 04:49 PM #7
if the wheels are hooking up yes should feel it . cam would work ok for a blowerIrish Diplomacy ..the ability to tell someone to go to Hell ,,So that they will look forward to to the trip
-
03-06-2013 10:31 AM #8
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
-
03-06-2013 12:59 PM #9
Irish Diplomacy ..the ability to tell someone to go to Hell ,,So that they will look forward to to the trip
-
03-07-2013 08:38 AM #10
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
-
03-07-2013 01:07 PM #11
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 doableIrish Diplomacy ..the ability to tell someone to go to Hell ,,So that they will look forward to to the trip
Thank you Roger. .
Another little bird