stock shaved head?

[shawn941]

will a stock shaved head give that much of a noticable gain? my comp is at 125 both sides,,,says it will raise it 35-40 psi,,,,will i feel the gain? oh ya,,,mods =+4 timing,,,old school fmf fattys,28 pwk's, boyesen dual stage power reeds on stock ported cages,k&n pod open air box,,,thanx in advance

[suncor570]

will a stock shaved head give that much of a noticable gain? my comp is at 125 both sides,,,says it will raise it 35-40 psi,,,,will i feel the gain? oh ya,,,mods =+4 timing,,,old school fmf fattys,28 pwk's, boyesen dual stage power reeds on stock ported cages,k&n pod open air box,,,thanx in advance

 

Not too familiar with the banshee but on my blaster .025 made a big difference.

[bonerific250]

comp is going to depend on how much you are going to shave it, the most you can go with shaving a stock head is .025 also if your comp is 150psi or higher you will need to run race gas. I would do a squish band test first to get a better idea of how much you can even take off.

[bansheesandrider]

comp is going to depend on how much you are going to shave it, the most you can go with shaving a stock head is .025 also if your comp is 150psi or higher you will need to run race gas. I would do a squish band test first to get a better idea of how much you can even take off.

You can go more than .025 inches. My current head is cut .040 inches and rechambered. I have seen heads that were cut .060 inches and worked fine, but I would not go any more than that. My bike had 185 psi when topend was fresh and currently has 175 psi and I run 2 gals of 110 octane race fuel mixed with 3 gals of 93 octane pump gas with no problems. My point is every bike is different and there are no hard and fast rules when it comes to timing, jetting, compression, and octane.

Edited May 20, 2010 by bansheesandrider

[shawn941]

You can go more than .025 inches. My current head is cut .040 inches and rechambered. I have seen heads that were cut .060 inches and worked fine, but I would not go any more than that. My bike had 185 psi when topend was fresh and currently has 175 psi and I run 2 gals of 110 octane race fuel mixed with 3 gals of 93 octane pump gas with no problems. My point is every bike is different and there are no hard and fast rules when it comes to timing, jetting, compression, and octane.

ya,,,im at 125 per side with my stock head,,,pretty fresh top end,,,gonna have to dp another comp test once i install the new head,,,,says i will gain 35-45 more psi,,,,hopefully i will be able to run 93

[shawn941]

comp is going to depend on how much you are going to shave it, the most you can go with shaving a stock head is .025 also if your comp is 150psi or higher you will need to run race gas. I would do a squish band test first to get a better idea of how much you can even take off.

i thought it was more than 150 psi to have to run race gas,,,,like 160-165????

[shawn941]

comp is going to depend on how much you are going to shave it, the most you can go with shaving a stock head is .025 also if your comp is 150psi or higher you will need to run race gas. I would do a squish band test first to get a better idea of how much you can even take off.

i thought it was more than 150 psi to have to run race gas,,,,like 160-165????

[shawn941]

so nobody has really said if i will notice a gain with this new head???

[shawn941]

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=150431301528&viewitem=&sspagename=STRK%3AMEWNX%3AIT

[toytech]

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=150431301528&viewitem=&sspagename=STRK%3AMEWNX%3AIT

 

yes you will see a gain in power, before I spent money on that head I would get a coolhead then you can change the domes to get the compression you want and it will run cooler, the noss anadized heads look kool to

[bansheesandrider]

yes you will see a gain in power, before I spent money on that head I would get a coolhead then you can change the domes to get the compression you want and it will run cooler, the noss anadized heads look kool to

If you use a reputable builder that knows what he is doing, he will know how much you can take off and how much pressure you will gain. A coolhead is going to cost $300 by the time you get it on the bike, you can get the stock head cut for $75 or less and a new gasket and you are into it for less than $100. I have never had a problem with overheating with a stock head, my bike runs at about 185 degrees on a warm day. But if for some reason I had to buy a head I would probably go with the Noss head.

 

Increasing your compression will make a big difference in power, especially at the low end.

[J-Madd]

I've always had 0.030" milled off of them and get around 150 psi. BUT, there is a wide variance in the casting of the stock head, so you may get more or less psi increase with 0.030" taken off.