| Author | Message | ||
     Snowdave |
I have two sets of pistons and only one set of cylinders. I would like to change out the pistons several times each year. One is for racing at 13:1 and one is for street at 10.5:1. I know that the cylinders had a great hone job and the leakdown is minimal currently. Will I see increased leakdown by changing pistons that frequently? I just don't have the cash for another set of cylinders. BTW, each set of pistons has its own rings and I plan on keeping it that way. | ||
| Blake |
Dave, I cannot imagine not seeing ring sealing problems if you change pistons and rings without rehoning the cylinders. Maybe nicasil plated cylinders would work better, but even then I'd be skeptical. Just guessing, don't really know. You KNOW my recommendation. Same as Aaron's. Has nothing to do with ring seating. Put in the 10.5:1's and leave them, save yourself a ton of hassle and help save your engine. Have you had it dynoed yet? I'm curious what such high compression with not to radical cams brings to the party. | ||
| Steveshakeshaft |
As a side issue, can you use standard issue Buell rings with the Nikasil bores? | ||
| Rick_A |
You could...but shouldn't | ||
| Steveshakeshaft |
Care to enlighten me as to why and what the options are please ? | ||
| Blake |
Steve, Brian Nallin told me once... something about the nicasil having a different hardness than the stock iron liners. I think the nicasil plating is harder. | ||
| Snowdave |
As a guy working in an engine manufacturing facility that has sold both hard cast iron and chrome plated liners, let me confirm that if Nickasil is anything like hard industrial chrome, it is much harder than cast iron. Mixing the rings is a BAD idea. BTW, I have decided to just take the bike for a Dyno run with the current pistons, then I will be changing over to the lower compression ones for good. If only my local H-D stealer didn't want to rape me for a Dyno run. I have to drive up to Sauk Prairie to get it for a good price. Not that I mind since there are plenty of curves up that way! | ||
| Mikej |
Snowdave, What's the local dyno-price down there? Just curious to how it compares to up here. Did my M2 a few years ago, cost about $50 and included a little tweaking and guidance by Mr.Wrench. Haven't priced the newly-closest one to me yet. But have fun at Sauk. Seem like good folks there. | ||
| Snowdave |
If I recall correctly, a harley dealer is around 80-85, a Buell dealer is 35-50. | ||
| Steveshakeshaft |
Thank you Blake and all. It's not that I'm desperate to know, but past experience would tell me that I would run (for example) Chrome plated rings in an Iron bore, but perhaps not on a Chrome bore. Now there's been a lot of talk about Iron v Nikasil bores, rings etc... If I was wondering, I'm sure there are others too. One day I'll have to find out the "last word" on the matter eh? Thanks and regards. Steve steve_s@ukbeg.com http://www.ukbeg.com/ | ||
| Jimmytwobuells |
Snowdave, You might want to try Suter's in Madison for dyno time. He's an independant shop that works mostly on metrics but I don't think he cares whats on his dyno. Last time I was there he would do the dyno runs then let me do the wrenching (jet changes,timing, etc)! Hard to find a shop who will let you do that! | ||
| Jimmytwobuells |
Jezess!!! am I a dumba** or what? I just noticed this threads a year old. Oh well, Suter's still rocks! |
