compression

ok my new projcct has 12.5-1 pistons. i want to know how much i can safley deck the head to bring the comp. up as much as possible? i was thinking .035

ok my new projcct has 12.5-1 pistons. i want to know how much i can safley deck the head to bring the comp. up as much as possible? i was thinking .035As far as clearance you may be OK. I'd call whoever the manufacturer is of your pistons and ask them to be sure.

I wouldn't do it, 12.5 is plenty.
Decking the head will retard your cam timing, to recover you would need adjustable cam sprockets. You may also not be able to run the cam you want b/c of clearance issues caused by decking. Do what you want, just remember... If you give a mouse a cookie...

to recover you would need adjustable cam sprockets.And what's wrong with that:evillol:

sorry i didnt mention i have fidanza cam gears and crane 24's oh and this retarding the timing....its very minimal and can be corrected with my gears.

and 12.5-1 is plenty for you....not me.

Any Advice For Running 12.5:1 On 93octane?
Retards Needed?
I Have An Msd-dis-2 Programable, S-afc, And Many More Stuff....

sorry i didnt mention i have fidanza cam gears and crane 24's oh and this retarding the timing....its very minimal and can be corrected with my gears.

and 12.5-1 is plenty for you....not me.

UNLESS YOU ARE RUNNING RACE FUEL ALL THE TIME, 12.5:1 IS RIGHT ON THE LIMITS OF DETONATION.

UNLESS YOU ARE RUNNING RACE FUEL ALL THE TIME, 12.5:1 IS RIGHT ON THE LIMITS OF DETONATION.

INCORRECT! ms 2 is god of detonation.

Do what you want, just remember... If you give a mouse a cookie... and while hes eating it ill run him over in my 13.75-1 compression first gen

What happens when you give a mouse a cookie? :confused:

you are aware that when you have to retard your ignition so much to get away with your high compression on pump, you are hurting power. its all a compromise.

you are aware that when you have to retard your ignition so much to get away with your high compression on pump, you are hurting power. its all a compromise.

AGREE.....

you are aware that when you have to retard your ignition so much to get away with your high compression on pump, you are hurting power. its all a compromise.

yes i am aware but for the most part this is gonna be a track car so race fuel will be used at the track. when i use it on the street ill just put some 93 in it and swap programs in the ms2 on the laptop.