Smoking and running rough

[mtnsammy]

Well I opened it up and it looks real good. The pistons are oversized so I think it is at max bore. Cylinder walls are clean and show no signs of taper or chatter. Pistons are sized at 76.96. I guess that means I need 77.00 rings or the 50 over set.

BTY The heads also look real clean. Minor cracking in the normal spots between valves.

Head Gasket is a 3 hole gasket. I still need to measure the piston height to see if that is right size.

[935racer]

This sounds like timing, specifically cam/crank.

On your flywheel is there a large notch and than a few degrees past that a small "0" mark? If so you have a gasser flywheel and your crank is out 6 degrees.

[mtnsammy]

I have an ACME kit installed in a Suzuki. I checked the flywheel markings with a dial gage on #1 piston the day I installed it. Dead on. The flywheel is a custom cut/ adapted wheel.

Many issues with the machine shop that was working the motor. I am now just bumping the post to the top so I can keep some of ya informed. Looks like the rings are well worn or they used 40 overs instead?? Not sure how rings could have worn in 5,000 miles with out other issues too. Anyways I am waiting for the 50 over rings to come in then I will post the final results.

[mtnsammy]

OK so my pistons are marked as 76.96 and the bore measures 76.92. I am assuming the pistons are 50 over and I just am not measuring the bore right. I am still waiting on a set of inside mics to get an accurate measure. Witha digital Harbor Freight top notch caliper I get 76.92. Any thoughts on rings. I think it is going to be 50 over rings.

Also has anyone resleeved their block? With the bore at its max I am considering a resleeve. Of course I need to find a shop too but I would like to hear if anyone had any luck with it first.