Milled my h22 head .30 how much do i advance the cam timing ? what is the formula for this ? thanks i searched and found nothing.

 

anybody ????

 

umm why would you advance your cam timing due to milling??? maybe the ignition timing.. but cam degreeing should have no affect.. probably why you found nothing when searching, all degreeing your cam does is change your powerband... since you milled maybe your compression went up.. and maybe can advance ignitions timing

 

u need to compensate for the missing material on the head because when you mill it off, the timing belt distance is basically shortened a bit and will affect the tdc of the cams.

sorry i dont konw a formula off hand, i usually just tune my cam gears on the dyno and see what makes power

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Eddiebx &raquo;</TD></TR><TR><TD CLASS="quote">u need to compensate for the missing material on the head because when you mill it off, the timing belt distance is basically shortened a bit and will affect the tdc of the cams.

sorry i dont konw a formula off hand, i usually just tune my cam gears on the dyno and see what makes power</TD></TR></TABLE>

no sh%t really?!!! i think he knows this. thats why he is asking.


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DcWest &raquo;</TD></TR><TR><TD CLASS="quote">Milled my h22 head .30 how much do i advance the cam timing ? what is the formula for this ? thanks i searched and found nothing.</TD></TR></TABLE>

I have had my head milled .030 as well. after all the searches the best info I could find seemed to be .012=1 degree at the cam. so a .030 would be 2.5 degress advanced. thats what i am going to do until i get it to the dyno. getting my head back tomorrow myself. hope that helps a bit. good luck.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Honda_Tengoku &raquo;</TD></TR><TR><TD CLASS="quote">no sh%t really?!!! i think he knows this. thats why he is asking. ...</TD></TR></TABLE>

why dont you try and read the post right above mines, and then gingerly place your foot in your mouth, thank you

 

thanks man.

 

Degree the cams in to the int LCA specified by the cam manufacturer?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DcWest &raquo;</TD></TR><TR><TD CLASS="quote">Milled my h22 head .30 how much do i advance the cam timing ? what is the formula for this ? thanks i searched and found nothing.</TD></TR></TABLE>

if your using stock cams use the pin holes on the cam to align that cam at TDC. I just installed my stock cams back in tonight on a .030 headshave. it came out to 2 degrees on both cams was pretty much right on. perhaps 2.5 degrees at most. so .012-.015=1 degree seems to be about right. Ohh yeah using golden eagle cam gears as well and they are very precise.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DcWest &raquo;</TD></TR><TR><TD CLASS="quote">Milled my h22 head .30 how much do i advance the cam timing ? what is the formula for this ? thanks i searched and found nothing.</TD></TR></TABLE>

The formula is simple geometry. You can measure the diameter of the cam gears, or also measure the tooth pitch on the belt and count the number of teeth on the cam gears. Then figure out how much ".30" (inches, is it?) will change the angle on the gear (and you remember that the cam gears turn half as much as the crank, right?). Anyway, 0.30 inches is quite a bit, and you may have problems with the tensioner taking up the slack. Might want to check your clearances and structural integrity of the head, etc.

If you mean .30mm or if you meant to say 0.030 inches, then you probably don't need to worry about your timing.