trayfoe Posted April 7, 2004 Report Share Posted April 7, 2004 I am looking into shaving the stock head to bump the comp up but was wondering what all is involved with this. I would like to shave it to bring the comp up to running race gas. Any feedback would be helpfull. Quote Link to comment Share on other sites More sharing options...
sredish Posted April 7, 2004 Report Share Posted April 7, 2004 I am looking into shaving the stock head to bump the comp up but was wondering what all is involved with this. I would like to shave it to bring the comp up to running race gas. Any feedback would be helpfull. The Schick Quattro works the best, though I've had good luck with the Mach 3. Seriously, send boonman a private message and he will hook you up by milling your head just the way you want it perfectly and in a speedy time. Guaranteed!! He's done quite a few that I know about and I'm sure loads that I don't know about. Scott Quote Link to comment Share on other sites More sharing options...
trayfoe Posted April 7, 2004 Author Report Share Posted April 7, 2004 Well there is a guy in town who does work on ATV and Dirtbike stuff, I was just wondering about gaskets and other things and if the head will be able to get put right back on without and mods? Quote Link to comment Share on other sites More sharing options...
nater006 Posted April 7, 2004 Report Share Posted April 7, 2004 It should fit fine with your stock gasket. This isn't something you're going to want to attempt yourself though. Getting the mating surface perfectly flat and milling it exactly how you want it... you'll definitely want a machine shop or boonman to do it. Another option is to get a Noss head or PD Cool Head and then you can just switch the domes to smaller ones as you change to race fuel or similar. Quote Link to comment Share on other sites More sharing options...
boonman Posted April 7, 2004 Report Share Posted April 7, 2004 Send me your stock head, And $20, and I'll send you a head machined for 175 PSI on stock domed pistons. Can't beat that with a stick... It's the one that is on my bike right now. I don't want race fuel anymore..... Quote Link to comment Share on other sites More sharing options...
KRMit Posted April 19, 2004 Report Share Posted April 19, 2004 Send me your stock head, And $20, and I'll send you a head machined for 175 PSI on stock domed pistons. Can't beat that with a stick... It's the one that is on my bike right now. I don't want race fuel anymore..... Don't you have to run race fuel at that high octane? How much do you shave off for that? I was kinda aiming for about 150psi. Quote Link to comment Share on other sites More sharing options...
boonman Posted April 20, 2004 Report Share Posted April 20, 2004 .055" and a little "massaging" of the squish area to keep things happy. 150 PSI is about .030" off the head at sea level. Quote Link to comment Share on other sites More sharing options...
KRMit Posted April 20, 2004 Report Share Posted April 20, 2004 .055" and a little "massaging" of the squish area to keep things happy. 150 PSI is about .030" off the head at sea level. About how long does it take you to get it shaved and sent out? Quote Link to comment Share on other sites More sharing options...
boonman Posted April 20, 2004 Report Share Posted April 20, 2004 1 day. I get your head in, I machine it, and if it is early enough in the day, (depending on when my damn UPS driver gets there, or worse, U.S. postal service, or worse yet, Fed EX) I can ship it back out that same day. I did some mods last summer, I go the parts on Tuesday, and the individual paid the extra freight, and he had them back Wednesday. So, he was down from Monday morning, to Wednesday afternoon. Depending on where you live in the country will depict how long it takes to get back to you. I ship UPS ground. ( I pick up the shipping cost) Quote Link to comment Share on other sites More sharing options...
KRMit Posted April 20, 2004 Report Share Posted April 20, 2004 What are the downsides to bumping the compression? Does it sacrifice reliability? Quote Link to comment Share on other sites More sharing options...
sredish Posted April 20, 2004 Report Share Posted April 20, 2004 What are the downsides to bumping the compression? Does it sacrifice reliability? not generally Quote Link to comment Share on other sites More sharing options...
nickxc Posted April 20, 2004 Report Share Posted April 20, 2004 boonman thats a fast ass turnaround, I had mine done locally and my motor was down a full week but it is a great mod. Quote Link to comment Share on other sites More sharing options...
Cotton eyed Joe Posted April 20, 2004 Report Share Posted April 20, 2004 What are the downsides to bumping the compression? Does it sacrifice reliability? About the only "negative" is you'll get an increase in head temp. The only way I even really noticed it is I had a majority of my engine work done before I had aftermarket exhaust. Once I put the T-5's on it let alot of that heat out in the exhaust rather than keeping it restricted and letting the heat build up. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.