Clevite Performance Rod Bearings/ Main bearings..Yes or NO?
- Thread starter plaaya69
- Start date
Just came down to availability in the sizes I'm using!
My crank has extensive work and after a miscalculation on my part I ended up with chatter marks in 2 rod journals so had to cut the Rod journals 30 under!
My crank has extensive work and after a miscalculation on my part I ended up with chatter marks in 2 rod journals so had to cut the Rod journals 30 under!
ok, i realize the toga's say they fully grooved for max oil flow over the bearings, same goes for the ndc's and the others u used?
Genuine Group A Bearing sets are fully grooved but I'm not sure I agree with the reasoning behind doing this as it removes surface area from the loaded side of the bearing.
Most available bearing sets are only upper grooved. (Toga's being the exception)
My Crank shop while not bagging them outright suggested to NOT use ACL bearing in a maximum effort performance build as they tend to flake (PITA as ACL are close by)
Most available bearing sets are only upper grooved. (Toga's being the exception)
My Crank shop while not bagging them outright suggested to NOT use ACL bearing in a maximum effort performance build as they tend to flake (PITA as ACL are close by)
OK, do you have a bit of an explanation on what happens with less surface area on the bearings as you mentioned a bit there..
As i could see the advantage of holding more oil on teh bearing with a fully grooved one
As i could see the advantage of holding more oil on teh bearing with a fully grooved one
Ok this will be a little "simple" but more area means less PSI force on the bearing.
Your crank rides on a film of Oil and should never touch the bearing surface while running.
If you have less area the PSI is higher and even with a good film/pressure you can end up wiping/smearing the bearing surface (think of soft putty and pushing it with a finger)
This also happens at High RPM/Loads if the bearing clearences are set too tight!
Your crank rides on a film of Oil and should never touch the bearing surface while running.
If you have less area the PSI is higher and even with a good film/pressure you can end up wiping/smearing the bearing surface (think of soft putty and pushing it with a finger)
This also happens at High RPM/Loads if the bearing clearences are set too tight!
haha, im just startin out, hopin not to walk in your foot steps 
, how long have u been running the bearing set u mentioned earlier, ndc, and such
, how long have u been running the bearing set u mentioned earlier, ndc, and suchI wiped a set of NDC Rod bearings but it was during sustained 8000 rpm and 30 psi boost runs with tight clearences!
Only just running the new motor in so it hasn't been abused yet!
The NDC's in the motor before the 8k/30psi effort looked good when pulled!
(I had built it looser and made the mistake of changing my specs for the next build)
Only just running the new motor in so it hasn't been abused yet!
The NDC's in the motor before the 8k/30psi effort looked good when pulled!
(I had built it looser and made the mistake of changing my specs for the next build)
ok well ill definantly keep an eye out on these when im going to purchase some, good online store for them?
Dunno I get mine locally here in Australia!
You might want to compare prices there and see if it's any cheaper to buy em in NDC boxes, might be cheaper to buy em in Clevite boxes!
(it's the other way around here but we're closer to Japan than the USA)
You might want to compare prices there and see if it's any cheaper to buy em in NDC boxes, might be cheaper to buy em in Clevite boxes
!(it's the other way around here but we're closer to Japan than the USA)
I can't find NDC boxed as NDC in california. I checked Kragen and a few other places. I just got the Clevite's, paid $110 for main and rod bearings. Seemed fair to me.
The Clevite Rod bearings are actually NDC, but the Clevite main bearings are something else. I have old NDC mains so I know they are different.
Marking on the Mains:
STD
GS70287LC
AK B
Marking on the Mains:
STD
GS70287LC
AK B