D/A/N
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Joined: August 13, 2010
Posts: 2239
Location: 11222
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 Posted: Tue Jan 12, 2021 7:04 pm Post subject: Re: Post-Mortem of a 1904: Need some input |
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[quote="Rome"]Your comment below is why I wrote that your cylinders have been shortened:
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| I dug into the build notes and emails from the builder from back in 2013 and found that he had the cylinders trimmed at the end where they seal to the case in order to get rid of positive deck |
Got it. I wasn’t being clear but there’s no invoice for machine work on the A cylinders so they’re “fresh”.
| Rome wrote: |
| If you want to test stock-length uncut cylinders with the intent of building the engine back up with them, then you will have to check the pushrod lengths, rocker geometry, carb linkage width, possibly the muffler/header width. The engine will be wider than when built. I think the easiest way to get the engine running slightly better, without a full disassembly, is to fit those 0.010" shims to the "low" cylinder pair as several others have recommended. But "cc" your heads so you can determine the engine's compression ratio. Then you have the additional option per nsracing, to swap the tighter head (smaller cc volume) to the engine side with the larger deck heights. I remember this scenario was mentioned by Gene Berg in one of his newsletters, or another publication that I read with great interest in my early engine-building days in the late '80's to early '90's. |
Understood. I guess I have at least 3 options to consider now. Of course the frustrating thing is why wasn’t this done right the first time around? Do most people just check deck on one cylinder and hope for the best on the rest of the motor?
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1984 Vanagon Westfalia with EJ25 conversion
Manual Transmission 4.14x.85
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sjbartnik
Samba Member
Joined: September 01, 2011
Posts: 6041
Location: Brooklyn
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| Posted: Fri Jan 15, 2021 2:47 pm Post subject: Re: Post-Mortem of a 1904: Need some input |
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| modok wrote: |
What "I" would do, is take it apart, and scatter the parts to opposite ends of the country so it cannot ever be (even accidentally) assembled again.
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1965 Volkswagen 1500 Variant S
2000 Kawasaki W650 |
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