i want to lower my compression

rbonella

Member
Dec 15, 2008
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Got a quick question for you all. I'm acquired a 351 windsor from a friend who is selling all his parts for $ ( economy is killing him) As far as i know, its a 357 (.40 over) with 10.5:1 vanolia pistons, forged h-beam rods, a cut/lightened crank, Canfield aluminum heads ( i don't know c.c's) it has 2.02int/ 1.60exh valves. b-cam, old gt-40 tube intake upper and lower. 75mm tb, 77mm mass air, powerpipe, longtubes, 1.6 roller rockers. I was told it has to run 92 or higher octane fuel or it will ping at around 180 degrees+. The heads, intakes are out of box...not ported. I guess 2 ?'s 1st, how much power do you guys think it makes (it's only got around 1000miles) 2nd, Im interested in turbocharging the motor, but I know I would be greatly limited with the amount of boost I could run with 10.5:1 pistons and I want it to be pump gas. Is there any way to lower compression on this motor without replacing pistons? Can I change the heads. I might have a problem b/c I dont know what c.c the chambers are. I would like to get my compression to a boost friendly 8.5:1 9.1:1 tops! The cheapest way would be great, but I want to do it right too. Im a firm believer in doing and job once and right! The motor is fresh and that's why I dont want to break into it if I dont have to. Any advice would be greatly appreciated!
 
you can have the combustion chambers opened up and you can run a ticker head gasket I did this on a true flat top 302 with 58 cc heads I opened the CC up to the edge on the head gasket and I put .065 head gasket from Cometic. worked great. I didn't even have to get longer push rods.
 
x2 . . .

find a good head porter and have the heads ported and the chambers opened up.

The canfield 190s have some meat in the chambers and if the guy knows what he is doing, can make the chamber a little better. I would also run a larger cometic.

My shot in the dark guess would have been ~330rwhp and probably ~370rwtq with a stick . . .