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914World.com _ 914World Garage _ Jeff's 2270 Build

Posted by: NCRider Oct 27 2016, 07:50 PM

Hi all ,
I started my 2270 build in 2013 and as many of use life had other things I was to do. But Im back on it now. Im starting this so I have a topic I can ask for advise. Below are 2 Topics a posted in 2013 as part of this build.

Case Stud Sealant?
Rocker set question?

Currently I am shuffling cylinders and pistons around to get CR as close as I can across all cylinders. I am finding some deviations in chamber volumes, deck heights & stroke measurements.

I didn't measure the crank stroke on the bench before i put it in the motor for the mock up. But I will once I tear it down. I am however measuring it directly for each cylinder, and finding bit of deviation from cylinder to cylinder. Im guessing that this is some what expected. Let me know what you guys think about measuring stoke in this way. Im thinking its pretty accurate with all the parts in place. The A's & B's represent the head chamber volumes with the heads in the 2 possession. The little box number are the spigots and the big numbers are the cylinders and sub numbers are the piston numbers.

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Jeff

Posted by: ottox914 Oct 28 2016, 02:22 PM

WOW, thats a sweet rig for measuring deck height. You build it or buy it?

Posted by: NCRider Oct 28 2016, 04:06 PM

I made them. I hope to make some progress this weekend.

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Posted by: NCRider Oct 30 2016, 10:38 AM

Does anyone know what the spec is for the difference in cylinder height? I have about .0025 difference when torqued down. Will that cause a problem with the head sealing?

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Jeff