Raising compression using Jb Weld?
 

Alright so I've seen Jb weld used to fix holes in pistons before, I've also seen it used to fill gaps in the cylinder wall. Than I began to think what if you used Jb weld to create a dome on the piston only about a mm or so high. Could this be done if the jb weld was made sure to be uniform all around and still have the valve seats in the piston? Just wondering because I have an Atv and the compression ratio is only 7.6:1 and well I'd like to have it a little higher.

Re: Raising compression using Jb Weld?
 

what kind of atv is it. what engine.

Re: Raising compression using Jb Weld?
 

200 cc honda 4-stroke.... It's surprisingly quick as it stands but as with everything you always want more. I have a few spare engines so if this seems feasible I may try it out on one of them and hopefully I will get a deacent amount of time on it.

If it doesnt seem feasible I may still do it anyways lol get 15 minutes of fun....

Re: Raising compression using Jb Weld?
 

yeah it works just fine. i have jb welded cylinders and a nice size dome i have been runing 12.5:1 compression for almost 3 months now.

Re: Raising compression using Jb Weld?
 

excellant >:D what kind of prep work did you do to the piston and what kind of finishing did you do to the jb weld... any tips?

Re: Raising compression using Jb Weld?
 

no ------- way, the jb weld doesnt melt? if you do this you better ------- clay it to make sure it clears

Do atv motors not run nearly as hot?

Re: Raising compression using Jb Weld?
 

id think it would melt also, i used it on a radiator preped correctly and it melted off :l. just go bigger displacement.

Re: Raising compression using Jb Weld?
 

well i've seen it used to fix holes in pistons and it actually stood up to the abuse. I would guess it would work.... hmm I hope so

Re: Raising compression using Jb Weld?
 

no way this would work. The jb weld will melt right off. I tried to use jb weld on my friend oil feedline on his turbo once and that ---- melted off into a bubbly mess of liquid in about 5 minutes lol.

Re: Raising compression using Jb Weld?
 

I don't think you did. It is not possible. maybe some ass hole told you they jb welded their pistons, but they were ------- with you. this is todays dose of reallity