Rybeans street/track Ek4


Little update.

Manley H Beam

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Old vs New

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Plasti-Guage fun.

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OEM Brown big end bearings on stock b16 44.99mm crank journal. All 0.001".

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Too tight then yes? What's next plan?
 
OEM Reds have brought me to 0.0015" big end bearing clearance. Getting some green plastigauge to see exactly where Iam currently sitting. Stuck now between polishing the crank which I don't want to touch or putting a set of HX ACL bearings in. If Im around 0.0016" bearing clearance which I will find out soon I may just run with it. Opinions ?

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You measured with anything other than plasti-gauge? Personally I'm not too sure it can be trusted on its own.
See what the green gauge says, if it was N/A road car I'd run it boosted could be a risk though.
May well be fine I have no experience with this lol
 
You measured with anything other than plasti-gauge? Personally I'm not too sure it can be trusted on its own.
See what the green gauge says, if it was N/A road car I'd run it boosted could be a risk though.
May well be fine I have no experience with this lol

Hard to measure bearings with a mic due to the shape and curvature. Plastigauge is widely used and good for getting you within spec. The ACL Flexigauge is on the way and measures between 0.001 and 0.003 so more accurate so will see what is puts me at.
 
There are plenty of tools out there to measure a bore. As I have just done. Subtract the size of the journal against the bore size of the bearings torqued down in the rod and that should be your clearnance.
I know plasti gauge is widely used(I'll be using it aswell) but IMO when your that close to the limit in clearnace id rather measure again with another method to be sure.
 
Get some Clevite green plastigage, much better resolution than what your currently using.
 
Wish I knew what you lot are talking about lol
I'm clueless on engine building and internals.

Could use this thread to learn though as its very informative.
 
Wish I knew what you lot are talking about lol
I'm clueless on engine building and internals.

Could use this thread to learn though as its very informative.

Could be alot more detailed I just havn't had the time recently to post up huge updates. Lazy me.
 
Yes looks similar in resolution

Measured today with the different plastigauge. Definitely bang on 0.0015" clearance on the big end. What's my next best move ? If I'm bang on 0.0015" on reds, what can I expect from a set of HX Acl bearings, the information I find states they are the same size as the OEM Reds at 0.0587" although with an extra thou over std size OEM Green they should be 0.0581". Ideas?
 
Measured today with the different plastigauge. Definitely bang on 0.0015" clearance on the big end. What's my next best move ? If I'm bang on 0.0015" on reds, what can I expect from a set of HX Acl bearings, the information I find states they are the same size as the OEM Reds at 0.0587" although with an extra thou over std size OEM Green they should be 0.0581". Ideas?
:blinx: One day il understand all this lol
Sweet ride. Keep up the good work :clap:
 
I've got a set of used ACL rod bearings I can send you to be sure?
Reds the highest size available?
Bore the rod slightly?
Just trying to spitball ideas to help you out.
 
The undersized ones or STD size pal ? Reds are the smallest available yeah... if you have the undersized ones you're a life saver pal! If not I could always measure a set of std acl's.

and yeah I was thinking of honing/boring my rods, just hard because were working at such a small level 10ths of thou's etc. Going to call about tomorrow, there is a specialist place not far from me who may be able to help.
 
I believe they are standard size mate.
Would be for a b18 crank anyway.
 
48.006mm = Rod Bore Diameter
44.98 = Rod Journal on Crank
1.489 x 2 = 2.978 OEM Red Bearing Diameter

(48.006 - 44.98) - 2.978 = 0.048mm = 0.0019in (rounded up)

Then working with max values it brings me to 0.0013"

This should be what I'm looking at, going to mic it all properly again when its not dark and cold.
 
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ye mad fuckers :lol:readin this makes me feel sane again haha. Pepole tell me im mad with what i do to my car so nice to see pepole takin it way further than me :))
 
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