COOL head

[blaster2006]

heya, not gonna get into alot of details, but i should be getting a shee by tomorow, i rode it etc seemed nice, ill explain more later as i gotta go pretty soon.

 

i couldnt comp test it, but ill have a compression tester after 2 weeks or so ( this would be after i bought it)

 

lets say that i bought the shee, and 2 weeks later, i comp test and i get about 80-100 psi, which is abit low.

 

which kinda means the piston wrings are abit worn, so by getting a cool head with about 21 or 22 cc domes, it would raise to about like 130 ish plus or minus, now by doing this, its okay right? theres nothing wrong with adding a cool head with like 21 or 22 domes, which is more comp than stock head, whilst having a stock of 80-100 psi?

 

there's nothing wrong with that yeah? which means im getting a cool head with higher comp instead of rebuilding it to naturally get its normal comp back up without the cool head, understand what im trying to say?

[kawiking]

heya, not gonna get into alot of details, but i should be getting a shee by tomorow, i rode it etc seemed nice, ill explain more later as i gotta go pretty soon.

 

i couldnt comp test it, but ill have a compression tester after 2 weeks or so ( this would be after i bought it)

 

lets say that i bought the shee, and 2 weeks later, i comp test and i get about 80-100 psi, which is abit low.

 

which kinda means the piston wrings are abit worn, so by getting a cool head with about 21 or 22 cc domes, it would raise to about like 130 ish plus or minus, now by doing this, its okay right? theres nothing wrong with adding a cool head with like 21 or 22 domes, which is more comp than stock head, whilst having a stock of 80-100 psi?

 

there's nothing wrong with that yeah? which means im getting a cool head with higher comp instead of rebuilding it to naturally get its normal comp back up without the cool head, understand what im trying to say?

. if u do a comp test and u come up with 80 psi.... it needs bored to the next size.. whole top end job. cyln bored,piston, rings and gasket .

just changing the head is not goin to fix the low compression problem .

[CBAIER1206]

What you are trying to do makes no sense. For the cost of a cool head, you could replace the top end and probably have your stock head milled as well to increase power and compression. You will see a far bigger increase in power by doing the top end than simply trying to put a "band aid" on your shee with a cool head. With compression that low, you will eventually have to do it anyways if not immediately. The only beneift to a cool head is that it will help your banshee run a bit cooler and the domes are interchangeable.

 

Good Luck

[sheefreak]

I agree w/Kawking. You do not want to try and band aid it w/higher compression domes. How did it start? If it started up nice w/just a few kicks, I can guarentee your compression is much higher than 80 to 100 psi.

[blaster2006]

where i live its VERY hard to get boring done, if they do it im scared its not as good as the US, or as "jeff at FAST" lol.

 

thats exactly why i need that "Band-aid" as i was planning on a cool head anyhow tbh. would it like make it any better, as i asked in my question?

[tedd1]

If the top end is worn enough to have low compression, not only are the rings worn, but the cylinder and piston are likely worn as well. If there is enough slop between the piston and cylinder, the piston will rattle the skirts off, you don't want that.

If you add a cool head to up the compression, it will put more stress on already worn out parts. The failure of those parts could be catastrophic.

Any semi competent auto machine shop should be able to fix you up. Please do it right....

Rick

[studroes]

i def agree with tedd1 on that one! dont risk it but bumping up the compression cuz if you are running low to begin with putting it up to 130psi is gonna make the outcome even worse; broken piston skirts, bent rods, cracked cases, etc...its not worth it!! spend the extra cash and send your cylinders out to get bored. you will def be farther ahead in the long run and your wheeler will run much more reliable. good luck

[278]

If you have low comp. as the others have said it's because stuff is worn out. Trying to band-aid it will cause more of a problem.