How much is too much to take off the Crank on the H22a. Is 8 pd too much...would it be worth it on a NA application..

THANKS

 

93SRVMAN Knife edged the crank on his killer N/A engine...you can come to the TPC webboard and PM him about it...

Hey did you get my message about the Type-s? My bud wants them for real now that his engine is completely fubar...

 

might try talking to benson machining they had quoted me on a knife edge for a d-series, awesome knowledge of our engines:
BENSON'S PERFORMANCE MACHINE
Dept. THP,
2909 S. Kilson Ave.
Santa Ana, CA 92707
(714) 241-1284

 

thankxs 4 the support

 

http://www.honda-performance.com


those are the guys i just seny my crankshaft too... these guys really know their stuff

 

..knife-edging is neccessary; in the old days and on cars w/ in which the crank actually passed through the oil, knife-edging was benefitial b/c it would reduce the drag on the crank as it passed through the oil, hence the cranks motion wasn't as impeded and the motor made more power. Also, machining and balanceing factory DOMESTIC cranks -where much of this "lore" comes from- was neccessary b/c of the terrible slap together "craftsmanship" at the factory; essentially if you wanted the motor to stay together under abuse, you had to tear it down, balance and machine everything, then go on to build it; it was part of the process.

Now, w/ the advent of better machining and more thoughtful and purpose derived engineering, much of the "tried and true" hot rod etiquette is unneccessary. A prime and pertinent example: Honda cranks don't even pass through oil!!; oil squirters cool the crank- and much of the retro-active machining done to older cars is superflous b/c casting/manufacturing methods at the factory have improved, greatly.

Essentially, you can do it if you absouloutly want to, but I wouldn't, b/c its unneccessary. Also, remeber, whenever you pull your motor apart and change/alter/machine factory components and resuse them, your risking the reliability and durability of that component b/c your changing it, physically and then asking it to perfom the same duty, or greater, w/out really knowing the implications of that change, on a structural and mechanical level.





[Modified by bb6h22a, 2:37 PM 8/26/2002]

 

I could not agree more, well said.

I had my old crank knife edged, and I ended up selling it on ebay when I looked into it further. You really do_not need your cranked knife edged, and polishing is only if the journals are scarred.

 

I agree with all the above, but add a couple of notes. You can lighten the crank, but I would only trust that to a reputable shop. Take too much off, and you now have a couple thousand dollar paper weight. The only other option I would consider it an oil shedding coating. Basically, oil won't stick to the parts and cause them to go off balance. Other than that, I wouldn't mess with it!

 

So, how much would they charge for the work, including balancing the bottom end

 

i have no idea about the cost, but if your engine is being rebuilt then why wouldnt you lighten/knife edge the crank? i did it and have no drivability problems. plus when they lighten it they also balance it. i dont see why people are saying its unnecessary... any mod is unnecessary because the car works from the factory... it will make a difference though...