I'm thinking of building a PSI 425 ATC based on the 250R. This would be strictly a sand/fun machine that is used for drag racing primarily. Has anyone had any experience with the PSI 425 mod, or anything similar? I'm looking for input on performance and reliability, problems, etc,etc. I post this because I have questions about the 75hp claim. I figure I should get some input before I spend 3K on a top end and crank.

 

I have not heard anything about the 425cc kit, however, I have had no problems with my "VCA 360 big bore stroker kit". I had it ballanced and eliminated the balanceshaft. It runs smooth as silk and will give a Banshee a good run in the 1/8th mile. Good luck, let me know how it goes.[img]i/expressions/face-icon-small-smile.gif[/img]