I was just flipping through powroll's web site and i came across the 393cc big bore kit for the 350x. There was also a package kit that came w/ heavier valve springs and a cam. How much of a HP gain can i expect from just the bore kit? Also would it really be worth it to go ahead and spend another $315 to buy the whole package w/ the cam and the valve springs, and if so how much more power would it have over the basic bore kit? Oh yeah and what compression ratio would be best to run? I'm not really looking to spend a fortune on this engine, just enough to have some good power. What do you all think?

 

Anyone?

 

Go back through the item description and they pretty much tell you what you should expect and what you will have to do as far as race gas. I would bet that the 393cc kit is quit a kick in the seat, but wow that 430cc kit has got to be amazing. With the 393cc select kit I bet you can get away with running 91 - 93 pump gas, ecspecially since it's targeted around 10.5:1 compression ratio. Let me know when you get it......

 

Butelr, What size tires do you have on the rear of your 350x? Thanks!

 

I am currently running 20" Turf Tamers on the rear with 14/40 on gearing.