Thread: Concerned with ACL Race main bearing clearance.

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2013-03-26 16:40:39

ebinkerd

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Concerned with ACL Race main bearing clearance.

Yes, red plastigage exists. Yes I read it right. No I did not read the ACL spec sheet right, and apparently this make unable to work on a engine. Yes I know how to read a vernier micrometer. Yes everything was in spec. Yes the plastigage was giveing me a .006 reasing. Yes I solved the issue.

Last edited by ebinkerd on 2013-04-02 at 13-31-13.

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2013-03-28 07:32:13

LukaMcCloud Online/offline status of LukaMcCloud is unknown

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Always go with factory specs.

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2013-03-28 09:05:14

nismo_star Online/offline status of nismo_star is unknown

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Are we all on page 393 SR20DE right ?

mic the journals and bore ?
.004mm / .0002"? as per ACL (corrected)
OEM range .004mm - .022mm (.0002" - .0009") (corrected)

What's the problem ? do you know how to read spec sheets ? If you do not understand how to read a spec sheet or FSM, or even how to mic a journal or read a bore gauge, you should not be assembling a motor.

Last edited by nismo_star on 2013-03-29 at 14-33-06. Reason: dont respond when buzzed

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2013-03-28 13:57:09

wnwright

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Originally Posted by nismo_star

Are we all on page 393 SR20DE right ?

mic the journals and bore ?
.004" / .0002mm ? as per ACL
OEM range .004" - .022" (.0002mm - .0009mm)

What's the problem ? do you know how to read spec sheets ? If you do not understand how to read a spec sheet or FSM, or even how to mic a journal or read a bore gauge, you should not be assembling a motor.

The irony here makes my head explode. 0.004" != 0.0002mm so you can't be reading the spec sheets right.

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2013-03-28 19:06:09

KillerKrossover Online/offline status of KillerKrossover is unknown

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Originally Posted by wnwright

Originally Posted by nismo_star
Are we all on page 393 SR20DE right ?

mic the journals and bore ?
.004" / .0002mm ? as per ACL
OEM range .004" - .022" (.0002mm - .0009mm)

What's the problem ? do you know how to read spec sheets ? If you do not understand how to read a spec sheet or FSM, or even how to mic a journal or read a bore gauge, you should not be assembling a motor.

The irony here makes my head explode. 0.004" != 0.0002mm so you can't be reading the spec sheets right.

X2, LOL

Originally Posted by nismo_star

Nismo Star, you have your inches and mm backward.

Originally Posted by ebinkerd

So I plastiguaged my mains after installing ACL race bearings and found my clearance to be at .006. But based on the measurements on ACL's website, the clearance should only be .001. So what the hell is going on here?

Edit: So I got on the phone with ACL and they pointed me to this site: http://www.aclus.com/content/ACL07(1).pdf
This list all of their specs for all of their bearings. So for the ACL race std, the clearance is .014-.0006.

The ACL race std clearance should be .0014"-.0006"

If you are getting .006", something is wrong.

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2013-03-28 19:19:07

BenFenner

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I remember when I researched trying to use plastigauge to measure bearing clearances on our engines. The accuracy/resolution of plastigauge is just barely above the accuracy needed for our factory specs. That means you could be in spec, or out of spec, and the plastigauge wouldn't ever be able to tell you.

I deemed the idea a non-starter.

Maybe plastigauge has gotten better since then?

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2013-03-28 21:40:29

wnwright

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Originally Posted by BenFenner

Sounds like you could have grabbed the wrong color or have wrong expectations for measurement accuracy.

When you starting measuring <0.001" lots of mistakes start happening. If each measurement with the micrometers has a +/-0.0005" error (which happens) you already can't trust your measurements.

Last edited by wnwright on 2013-03-28 at 21-47-15.

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2013-03-29 14:28:53

nismo_star Online/offline status of nismo_star is unknown

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yes, 5am posting while buzzed my faux

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2013-03-31 21:37:25

ebinkerd

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Originally Posted by 5speed

Originally Posted by wnwright
Originally Posted by nismo_star
Are we all on page 393 SR20DE right ?

mic the journals and bore ?
.004" / .0002mm ? as per ACL
OEM range .004" - .022" (.0002mm - .0009mm)

What's the problem ? do you know how to read spec sheets ? If you do not understand how to read a spec sheet or FSM, or even how to mic a journal or read a bore gauge, you should not be assembling a motor.

The irony here makes my head explode. 0.004" != 0.0002mm so you can't be reading the spec sheets right.

X2, LOL

Originally Posted by nismo_star
Are we all on page 393 SR20DE right ?

mic the journals and bore ?
.004" / .0002mm ? as per ACL
OEM range .004" - .022" (.0002mm - .0009mm)

What's the problem ? do you know how to read spec sheets ? If you do not understand how to read a spec sheet or FSM, or even how to mic a journal or read a bore gauge, you should not be assembling a motor.

Nismo Star, you have your inches and mm backward.

Originally Posted by ebinkerd
So I plastiguaged my mains after installing ACL race bearings and found my clearance to be at .006. But based on the measurements on ACL's website, the clearance should only be .001. So what the hell is going on here?

Edit: So I got on the phone with ACL and they pointed me to this site: http://www.aclus.com/content/ACL07(1).pdf
This list all of their specs for all of their bearings. So for the ACL race std, the clearance is .014-.0006.

The ACL race std clearance should be .0014"-.0006"

If you are getting .006", something is wrong.

As you can see, the spec is .014-.0006. So .006 is within spec. I have already verified this with ACL.

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2013-03-31 21:42:27

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ebinkerd

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Originally Posted by nismo_star

Those specs are for the basic ACL's. Search this part number 5m2964h, and you will see the specs for the bearings. And criticism is cool and all, but be chill homie, it is just a question.

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