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RACE 66 »
https://forums.nicoclub.com/race-66-u9915.html
Fri Oct 06, 2006 4:11 pm
To answer you question. It's hard to tell exact application as to rpm gains. Like I mentioned in the crankscapers web site, I 'am looking at approximately 100 to 200 rpms increase. They way the car runs, especially on a dirt track, you do have wheel slippage, with power coming on and off. So I feel comfortable saying that. Anything else, I would suggest using a dyno for "before" and "after" application to where the power application is more controlled. And to what type I got of scraper? I purchased the all metal type of scraper.
My original concern with the synthetic wiper was that, for when the inital fire up of a new engine, and the counter weights would be "bedding" in onto the wiper. In talking with the crankscraper folks, they releived my fears that so little of the material coming off the counterweights would not interfear with the bearing material in the rod and mains or clogging the oil filter up. If I had it to do over again, I probably would get the synthetic style. You need to be careful of going past the magic 7 number, I am not an engineer or nor a automotive guru, but you would need to make sure you have ALL your ducks in a row to press the engine that hard. As I understand (ie: volumetric efficency, stroke,timing,valve size, overlap, cylinder head design, "true" compression ratio, and many other applications) all have MINOR OR MAJOR concerns of this type of engine, or for any engine for that matter.Big thing though, don't get in a hurry when your assembling/or specing your engine, make SURE you have ALL the needed information/materials for your application.