2056 Build, Just starting teardown; some questions |
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2056 Build, Just starting teardown; some questions |
Spoke |
May 31 2015, 06:55 PM
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#1
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Jerry Group: Members Posts: 7,052 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
Finally getting into building a 2056 for my 914. Plan is to rebuild one of the two 2L engines I have with 96mm AA P/Cs. For induction, I have D-Jet from one of the 2L engines with a good MPS and set of Weber IDF40s. I would like to stay with FI but will consider using the Webers.
The engine will have ceramic coated SSHE along with a Bursch muffler. The first engine I bought was advertised as a 2L core with FI. In reality the engine was "cored". There is a hole about 3/8 x 1/2 inch in the case. Looks like the engine was run even with the hole as there is a good amount of dirt+oil on the fins of cylinders 3&4. Also one of the spark plug threads is stripped on cylinder #4. The seller said he would give me a line bored case that he has but I've yet to see it. I bought the engine in Aug of last year so I'm losing hope of getting the case; This ranks up there with one of my worst purchases. Since the first engine's case was trashed and the seller hasn't come through with the promised replacement case, I purchased a 2nd engine from Brad Mayeur that had been running. This one came with the Webers and likely will be the basis of my engine. |
Spoke |
Sep 8 2015, 10:45 AM
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#2
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Jerry Group: Members Posts: 7,052 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
I put the engine back together and got it running this weekend.
Since I didn't know if there were serious issues with the engine (was told it was running at some time), I reinstalled the carbs without adjusting or rebuild, original rotor and cap (it has Pertronix), wires, plugs, timing was as it was when I got the engine. I purchased a low pressure Mr. Gasket #42S pump and used a generic radiator overflow tank for a gas tank. 12V comes from my 914 using jumper cables. Engine started right up and idles well. Seems to rev pretty well. No oil leaks to speak of. Questions: How do I time a carb'ed 2056? Cylinder #3 occasionally backfirst through the throttle body. What could be causing this? https://www.youtube.com/watch?v=eOC3oVgZlCM |
stugray |
Sep 8 2015, 01:01 PM
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#3
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Advanced Member Group: Members Posts: 3,825 Joined: 17-September 09 From: Longmont, CO Member No.: 10,819 Region Association: None |
Questions: How do I time a carb'ed 2056? Use the TDC mark on the FW thru the access hole in the top of the trans. With an adjustable timing light, set it to ~30 deg and set it at 3500 RPM. Your actual timing will vary based on various things (altitude, CR, gas, etc) Cylinder #3 occasionally backfirst through the throttle body. What could be causing this? First things to check: Any intake leaks? Check the jets for clogs (main, idle, & accel pump). Clean out the carb bores in case any of the holes in the side of the barrels are clogged (the ones that get exposed as the throttle plate opens) |
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