SR20det ring gaps and bearing clearances

[hanzbrady]

Originally Posted by TheRealSy90

While we are at it, what's everyone's preference for rod/main bearings as well as clearances? I know there's a lot of variables involved such as if certain machining steps are performed or not.


Personally, I'll always go with OEM Nissan bearings, sized off of the markings that are stamped into the block and the crank, preferably WPC treated. But once any of that gets machined those are moot and needs to be properly measured out. However, i'll never personnaly run a crank that's been machined on the bearing journals as I believe they are surface treated and hardened, and you then lose that hardened material.


I've never been a fan of those ACL "race" bearings that just come one size fits all, no wonder people spin rods so often with those.
A friend of mine that builds fwd sr's often always goes with "calico" bearings?

Calico is a coating company. They're the company that Mazworx uses. Also worth noting every Mazworx and almost every Real Street build runs ACL Race bearings including my own engine, hell my SR even has a cut crank. The race bearings also come in 3 sizes STD, .025mm, and .25mm. These bearings are obviously most at home in a perfectly round hole that's machined with an aftermarket bearing in mind.

At the end of the day with modern manufacturing processes every bearing from every company is damn near identical in performance. I would comfortably use any of the big 3's (ACL, King, Clevite) race bearings interchangeably, it's all personal preference.

[TheRealSy90]

Originally Posted by hanzbrady

Calico is a coating company. They're the company that Mazworx uses. Also worth noting every Mazworx and almost every Real Street build runs ACL Race bearings including my own engine, hell my SR even has a cut crank. The race bearings also come in 3 sizes STD, .025mm, and .25mm. These bearings are obviously most at home in a perfectly round hole that's machined with an aftermarket bearing in mind.

At the end of the day with modern manufacturing processes every bearing from every company is damn near identical in performance. I would comfortably use any of the big 3's (ACL, King, Clevite) race bearings interchangeably, it's all personal preference.

Thanks for explaining all that lol, been a while since I've shopped for bearings, I remember now that Calico'd Clevites were his preference.

In regards to Calico and WPC, I assume if one was planning to get their bearings of choice WPC treated, then there would be no gains from having them Calico coated before the WPC treatment? Even though WPC says they can treat wear coatings as well and that it's more beneficial than non-treated coatings.


I haven't actually had parts WPC'd yet but it's super appealing, would love to do a new build with WPC on every internal part haha.

[hanzbrady]

Originally Posted by TheRealSy90

Thanks for explaining all that lol, been a while since I've shopped for bearings, I remember now that Calico'd Clevites were his preference.

In regards to Calico and WPC, I assume if one was planning to get their bearings of choice WPC treated, then there would be no gains from having them Calico coated before the WPC treatment? Even though WPC says they can treat wear coatings as well and that it's more beneficial than non-treated coatings.


I haven't actually had parts WPC'd yet but it's super appealing, would love to do a new build with WPC on every internal part haha.

Hmmm that's some internet science that's a bit over my head to be honest, thinking about multiple treatments and coatings and how they interact with each other hurts my head.