Rep Power: 293

Hello i wanted to know how many people have a milled head and what is the cam gear setting set at? What are the benefits of milling the head and what are the negatives about milling the head? I am very scarred right now because my mechanic messed up my head so he milled it. I am turbo and I have the Crower Stage two cam and i am going to hook up vtec i am very scarred the valves will hit the pistons. What do you guys recommend i set the cam gear at? I was thinking Advanced 4 degrees. Please help me out. The only good thing about valves hitting pistons is i get to buy pistons and rods with the help of the mechanic. I really don't want this to happen so please help me out any way you guys can.

 
Rep Power: 302

Most heads have a little extra clearance to allow for milling or resurfacing. Once should be fine. You can also get a thicker head gasket to compensate. If your head was overcut, you have to replace it.

 
Rep Power: 293

what do you mean overcut?

 
Rep Power: 0

I have had my head milled down after I blew a head gasket...I also had the shop do a Port and Polish and 4 angle valve job...Milling the head pretty much rasies the compression by a little bit...Like tinman said, you can compensate the higher compression after the milling with a thicker head gasket...You just have to make sure that the head isn't milled down too far, because there will be some clearance problems with internal parts in the head

 
Rep Power: 812

Milling = more compression, good for na, bad for turbo. Positives are more power with higher octane gas, but you need cam gear to adjust. I'm still waiting to get mine and tune it. Milling too much can cause problems like head bolts bottoming out, or too much timing belt slack.

 
Rep Power: 302

Milling off too much material. BAD.

 
Rep Power: 293

Well **** hopefully my mechanic didn't. According to him and another mechanic they say it won't hit especially with the cam gear. One other mechanic told me i am asking for trouble. What do you guys recommend i set the gear at?

 
Rep Power: 812

normally with a milled head, wil will need to advance the timing a couple degrees to get back to stock. Maybe a bit more if needed. But I'm guessing between 1-4 degrees. Only a dyno will tell.

 
Rep Power: 285

4 degrees is a lot.

just get a thicker head gasket to compensate.

Thats the best advice i can give you.

 
Rep Power: 812

ya i'm just saying. I wouldn't just choose something without a dyno. But yea thicker head gasket is the best way if you think he took off too much. Aren't you supposed to use domed pistons to increase compression anyway?

 
Rep Power: 285

milling the head accomplished the same thing (to an extent). By making the combustion chamber smaller, you are effectively raising the compression.

You can also change the dynamic compression with valve timing (among other things). So be careful when you adjust the cam.

 
Rep Power: 293

I set all the valves at stock settings and I am going to try advancing the cam 2 degrees to begin with and then go from there. On the dyno should i tell them to advance it more to see what happens or what do you guys suggest?

 
Rep Power: 812

A few degrees is all I would try. Maybe 3 max and run some better gas.

 
Rep Power: 379

I had mine like .12 and never adjusted anything

 
Rep Power: 297

when i had my d17 still in my car the head was milled twice to rasie compression. liike my tuner always say with milled heads... start with 2 dgrees advance then go from there