as the topic says

 

makes it easier to warp

 

Also valve clearance to pistons. If it is milled too much, I wouldn't suggest getting adjustable cam gears.

 

Actually if you do mill your head, you will need to get adjustable cam gears or you will be running with retarded cam timing.

The main draw back, as stated is smaller valve to pistin clearances. You can relieve the tops of your pistons for additional clearance. Anytime I start decking heads or blocks, I always mock up the build without a head gasket and use clay on top of the pistons to see how close pistons and valves are getting to eack other. For street motors, I like to run clearances of ~1mm...if you can spin the motor over without a headgasket and have no interferences, you will end up with ~1mm after you install the head gasket (stock head gasket).

Kirk

 

be ghetto.....single layer!

 

y would valve to piston clearance be any different than if i put higher comp pistons in to get the compression
milling= head closer to block, less space in combustion chamber, higher comp

pistons= higher dome, less space in combustion chamber, higher comp

or am i wrong, im just looking to mill my gsr head enough to give me 11:1 comp
which is approximately 30 thous off the head

 

i dont like milling because you cant 'un-mill' it...

 

Dont be afraid to mill your head, there is not real cons to it except, if you really do need to mill it one day you cant. The pros are it makes your chamber smaller and more efficient. in some combos they found more power in milling the head then with dome pistons, cause the dome of the piston messed up the natural swirl movement of the fuel and oxygen. on top of that a huge dome piston will not let the flame front of the spark igniting the fuel travel fast enought to make good hp, one more thing a big dome piston weighs more. Steve

 

definately be careful if you run high lift cams. My old head was milled and I put JUN III in.... attack of prancing horse valves was playing in my engine bay. Make sure your shop knows just how much to mill and make sure they mill just that much. Also don't forget that if you deck the block you will need the amount from that to calculate the total mill you need to perform.

 

i do plan on using jun 3 cams on a gsr motor with 30 thous off the head, will i run into valve to piston clearance problems??

 

I would HIGHLY reccommend claying the motor, I didn't and now I regret it.

 

have fun getting that timing right.. my friend had one and it was detionating when we got it back. had to take it off and throw it away. ****** tards...

 

High comp pistons have large reliefs. You dont get large reliefs when you mill your head.