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yeah my brothers 180sx which has a fully built sr20det, cp forgies, eagle steel rods H beam and acl race series bearings. Its a killer engine.

But then you get mechanics that will only use nissan bearings or a type of ring set etc

BTW they make good cheap bearings for rb26, 25 and 30 as well

yeah they are alright for comp engines (i use the race series) but a 100% no-no for streeters to hard and unforgiving ive gone back to kings believe it or not. i was noticing quite a lot of wear on the crank journals after long service periods (high km's) on road cars. Alot of the old V8 guys are seeing the same thing in thier high hp engines.

but hey every one has an oppinion and at the end of the day if it works then brand is irrelevant... there are 1000's of ways to skin a cat :(

the last few customer SR20's i pulled down were built using combinations.. clevite mains and nissan bigends... obviously someone found that combo worked for them or thier budget.... oh best mod on one was that they put 2 of the second rings in upside down.... worked great ...NOT

i use the acl race series bearings in my engine as well and its a streeter... got me worried now.... i use motul 300v chrono and i change it every 5000km's or before... i have the mahle acl forged pistons as well and china made H beam rods

lol that motor had standard pistons thanks mate.

And yes trent we pull apart the race motors every 5000-20000klm depending on how lucky we are and chuck in new bearings - our engine guy hadn't mentioned a concern with journal wear but I ight ask them specifically

We use CP pistons(Tomei on strokers) and ACL race bearings in almost everything inc WAs 2 fastest race Skyline and don't have any problems, Never seen this crank wear issue.

The only Piston I see with problems is Venolias with cracks starting at the oil jet cutout, but only on RBs.

We use CP pistons(Tomei on strokers) and ACL race bearings in almost everything inc WAs 2 fastest race Skyline and don't have any problems, Never seen this crank wear issue.

The only Piston I see with problems is Venolias with cracks starting at the oil jet cutout, but only on RBs.

how many of them have been torn down and micced up at 50000km? not many i bet.... like i said in all the comp engines i use acl race but for engines that need to last extended periods ive moved to something a little softer

  • 2 years later...
how many of them have been torn down and micced up at 50000km? not many i bet.... like i said in all the comp engines i use acl race but for engines that need to last extended periods ive moved to something a little softer

Shouldn't the engine oil create a protective film between the bearing and the crank, and the wear of the crank journals be a function of the oil's film strength rather than the hardness of the bearing?

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