B16 Mini 25

[keitht]

Originally Posted by k20/k24 allmotor

Wow. Looks like some body know how to rebuild a motor .. Really good bananas mate

Thanks Mate, I can't wait to get it running.

[keitht]

The main bearing clearances worked out at:

1. 0.0255
2. 0.0355
3. 0.041
4. 0.028
5. 0.03

I still have to plastigage but they look ok.

The big ends will have to wait until I get a new Micrometer.

[keitht]

I got the block sprayed as well, the picture makes it look very bright but it is a nice shade and very close to new cast aluminum. Time to get it back into the workshop and on the engine stand, I should get a bit more done over the weekend.

[ardonfast]

Have you got a set of test bars you can use to take up the missing gap so you can use the big mic. Not the best but fully possible .

[keitht]

Originally Posted by ardonfast

Have you got a set of test bars you can use to take up the missing gap so you can use the big mic. Not the best but fully possible .

I do and I would normally do this for simple measurements but it would be a right pain in the ass to set the bore gauge.

[ardonfast]

Ok I didn't want you twiddling your thums or looseing sleep,lol
And you are dam rite to cheack the mesh enlist work before assembally top work,

[jimbob34]

Looks proper job keitht
Would be interesting to see what your measurements are for the big ends
Have been measuring mine today for double check
And still came out with being too tight.


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[keitht]

Originally Posted by ardonfast

Ok I didn't want you twiddling your thums or looseing sleep,lol
And you are dam rite to cheack the mesh enlist work before assembally top work,

Ha ha not much chance of that I have enough work for 10 men!! Lol

Originally Posted by jimbob34

Looks proper job keitht
Would be interesting to see what your measurements are for the big ends
Have been measuring mine today for double check
And still came out with being too tight.


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Thanks Mate, What did your measurments come out at?

[keitht]

I got a bit more done today. I picked up a new micrometer as well.

I decided to keep the oil squirters as I frequent the Nurburgring so this engine will experience extended periods of high RPM usage.



This is the assembly lube I use, it is very sticky and messy but works well.

[jimbob34]

You got the same micrometer as I got,also had to get a dial bore gauge
Had another go at measuring today with new metric tools
Big end crank journals
44.99
Rod ID
1/ 48.03
2/ 48.03
3/ 48.02
4/ 48.02
My new HX ACL bearings measure
1.47 x2 2.94
BC 1and 2 0.050
3and 4 0.045



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[keitht]

Originally Posted by jimbob34

You got the same micrometer as I got,also had to get a dial bore gauge
Had another go at measuring today with new metric tools
Big end crank journals
44.99
Rod ID
1/ 48.03
2/ 48.03
3/ 48.02
4/ 48.02
My new HX ACL bearings measure
1.47 x2 2.94
BC 1and 2 0.050
3and 4 0.045

I measured mine up this morning.

Crank journals are 44.99

Rod ID

1. 48.03
2. 48.02
3. 48.00
4. 48.02

Bearings are 1.47

Clearance

1. 0.05
2. 0.045
3. 0.035
4. 0.045

Did you platigage to check measurements?

[jimbob34]

Yes plastigauged after and was corrected.
A lot happier with these tolerances using the thinner HX bearings
Are you also using the ACL race HX?



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[keitht]

Originally Posted by jimbob34

Yes plastigauged after and was corrected.
A lot happier with these tolerances using the thinner HX bearings
Are you also using the ACL race HX?



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Good stuff, I'm not ready to fit them yet so can't platigage.

Did you have tighter tolerances with different bearings?

No I'm using off the shelf standard king bearings, I have photos of the part numbers on this thread somewhere.

[keitht]

I got some more parts delivered over the weekend. B series gear linkage as my old one got binned by accident and an ITR flywheel which is in very good condition.

[jimbob34]

I first had ACL race bearings std
Then found out they do a thinner bearing that put me to my measurements within the top end of the tolerance
As the standard size was just bellow


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