Has anyone here used or seen ESR's 330 bolt on kit?? I mean the one where you dont have to bore the cases. If so what did you think??

 

I was considering buying that kit myself and would like to hear some feedback if anyone has any.

 

i researched the kit and it turns out to be a 310 bored out out to its last bore. its a pretty good running cylinder but personally i would like to have a few more bores on it. instead i chose to go wit hteh 350 pv from CT

 

I just got my ESR 350 Power Valve and ill let you guys know how it performs when the Snow leaves.I had the ESR 310 before and was very pleased with it.I just wanted a more usable powerband so i went with a Power Valve.In my opinion id pick Eddie Sanders Racing over any one else for R Motor parts.Great product,great service,and a great price.You will LOVE the 330 ESR kit. late,zubbeyboy

 

The ESR 330 kit is not a 310 kit bored out to it's last bore. In fact, a 310 kit is actually a 295 cylinder, it's only a 310 when it's on it's third and final bore, not too many people know this. A 330 cylinder is actually just that, it starts out at 330. Have no idea how they started naming the 310 cylinder a 310 instead of a 295!!

I have ESR's 310 kit and it rips!! I'm sure the 330 kit would be so much power you could hardly hang on!!

 

then how is it that cases dont need to be machined?

 

The cylinder is Nickasil (or equivelent) and uses a short skirted piston I have read, so the cases don't have to be machined. I'm guessing piston life may be shorter than the other steel liner/case bored set ups.

 

OK, just got off the phone with Darren at ESR on this issue so that I made sure I typed this correctly. The key is that you have to use the longrod crank and spacerplate. Everything except the bottem of the cylinder sleeve that sits in the spacer plate gets cutoff (about 1/4" of sleeve is hanging out the bottem). They leave that part there for more piston support. You can get them in 2 versions, Steel sleeves with 76mm being the 1st bore, with 76.5mm and 77mm being the overbores or you can get it nikasiled and choose one of the piston sizes. Even with the sleeve cut off this short they have not seen any difference in piston or sleeve wear or piston skirts cracking. Like I said this info just came from ESR and I typed it while he talked.