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post #11 of 58 Old 29th January 2019, 12:01 AM
sunghyun7
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I never took a note of the stamped letters on the bearings itself. I just hate seeing people getting ripped off. Chances are, they're selling off the shelf HX ACL, mixing it with the standard clearance ACL bearing as the lower shell, and marking them up. No need for that. Just get the hx and be done with it for anyone else thinking of doing this.

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post #12 of 58 Old 29th January 2019, 03:43 AM Thread Starter
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Originally Posted by sunghyun7 View Post
I never took a note of the stamped letters on the bearings itself. I just hate seeing people getting ripped off. Chances are, they're selling off the shelf HX ACL, mixing it with the standard clearance ACL bearing as the lower shell, and marking them up. No need for that. Just get the hx and be done with it for anyone else thinking of doing this.
Mine were all marked H.
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post #13 of 58 Old 29th January 2019, 04:15 AM
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...No need for that. Just get the hx and be done with it for anyone else thinking of doing this.
That is a fairly speculative statement. I personally wouldn't build a motor up with HX bearings alone unless it was a race motor. Too much clearance, IMO.

I have a set of H and a set of HX and will be taking some measurements and mixing sets this week testing for an S65 race motor.

Last edited by jcolley; 29th January 2019 at 04:16 AM.
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post #14 of 58 Old 29th January 2019, 03:39 PM
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[QUOTE=jcolley;7542854]That is a fairly speculative statement. I personally wouldn't build a motor up with HX bearings alone unless it was a race motor. Too much clearance, IMO.

Can the same be said when using a lighter oil? From my understanding a lighter weight oil will have more volume so that clearance will be negligible with a higher volume of oil. That was in the clevite info you gave me awhile ago. Good reading btw.
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post #15 of 58 Old 30th January 2019, 05:56 AM
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Can the same be said when using a lighter oil? From my understanding a lighter weight oil will have more volume so that clearance will be negligible with a higher volume of oil. That was in the clevite info you gave me awhile ago. Good reading btw.
Will lighter oil equate to more volume? I thought the oil sprayers can only spray so much oil? It wouldn't make sense that when the oil is lighter it magically sprays more oil. Unless I'm not understanding how that works.

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post #16 of 58 Old 30th January 2019, 01:44 PM
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i'm not going to argue with jcolley however I will say I don't see issue with larger gap in any engine as long as oil pressure holds and there's no journal/bearing contact.

You want to keep 10w-60 with larger gap. IMHO, if you go thinner oil with larger gap, it may have opposite effect than what stock s85 experiences: the oil may get out too quickly causing bearing contact.

As long as there's no contact and no oil pressure issues, I see no disadvantage to the slightly larger gap that ACL HX offers.

I plan on proving my point after 50k miles on my HX bearing set. I will take it apart and let the forum know. It will probably take me about 3 years to rack up that mile. It doesn't see any track time, but I rev it to redline every chance i get.

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post #17 of 58 Old 30th January 2019, 02:37 PM
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another rod bearing DIY (custom ACL/Lang)

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Originally Posted by simonnim View Post
Will lighter oil equate to more volume? I thought the oil sprayers can only spray so much oil? It wouldn't make sense that when the oil is lighter it magically sprays more oil. Unless I'm not understanding how that works.


Itís not magic, it hydraulicís and Iím not here to teach science. Think of a garden hose, how much can you push through it depending on the fluids viscosity.

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post #18 of 58 Old 30th January 2019, 11:08 PM
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It’s not magic, it hydraulic’s and I’m not here to teach science. Think of a garden hose, how much can you push through it depending on the fluids viscosity.
Yikes. I hope you didn't take that offensively. I was honestly asking a question.

It makes sense that the total volume being sent through the sprayer would increase over the same period of time. But in my mind how would that affect the bearings with clearances so small. In my mind that's similar to saying let me wash this bean with my sink, but it'll be cleaner if I wash it with a fire hose. I don't understand how surface area can increase with changing oil viscosity.

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- Bearings changed at 69,500 with WPC coated 702/703
- RPI scoops & BMC filters
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- Gloss black kidney and fender grills

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post #19 of 58 Old 31st January 2019, 04:47 AM
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Just started my rb job today. Iím using acl hx, plasi gauge all within 2.5 to 3 thousandths. I plan on using a lighter oil so some extra space is worth it. Canít wait to have it done.
You got it way wrong. Lighter oil and wider clearance will give you more issues than you are bargaining for...
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post #20 of 58 Old 31st January 2019, 03:42 PM
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You got it way wrong. Lighter oil and wider clearance will give you more issues than you are bargaining for...


Please explain
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