Visit The Dirt Forum for More Information

Author Topic:   engine question with head piston combo!!
pbrcowboy2
Dirt Freak

Total posts: 380
posted April 06, 2005 08:22 AM  
I have a set of 601 heads 53cc heads and .030 dome top pistons these are huge dometop pistons with a 2 valve relief inside the skirt part numbers are a 1265P with parrell lines on the out side of skirts.

With these heads and pistons though what is a good ball park range for compression was looking to get maybe 11-1 gonna try running with the a-mods at eagle raceway in nebraska in fall gotta get this motor together!!

rico 08
Dirt Forum Champ
Total posts: 1139
posted April 06, 2005 03:36 PM  
1265p pistons are .400 dome...that's 14.5-1 with 64cc heads.i'm willing to bet they will hit 58cc heads,even if they will work you are looking at say 15.5-1 at least..you need 76cc heads with those pistons for 11-1.

Istock66
unregistered Total posts: 1139
posted April 06, 2005 06:50 PM           send a private message to rico 08   Edit/Delete Message   Reply w/QuoteBBBBBB
Hes right on there.

why limit to 11-1 though put some humps on at least!!!!

pbrcowboy2
Dirt Freak

Total posts: 380
posted April 07, 2005 06:04 AM  
would 487x heads work great with this combo!!!

rico 08
Dirt Forum Champ
Total posts: 1139
posted April 07, 2005 06:13 AM  
Yep..speedway shows 12.5-1 with a 76cc head.

Back to the Archives