Okay, help with my motor, was: "carb dial in help? (webber IDF 44)" |
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Okay, help with my motor, was: "carb dial in help? (webber IDF 44)" |
VaccaRabite |
Jul 5 2008, 12:31 PM
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#1
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En Garde! Group: Admin Posts: 13,456 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
*edit* Note, cylinder bank 3/4 is not firing. Plugs are oil fouled. All four cylinders have decent compression, considering that the rings probably are not set yet. Carbs are fresh rebuilt, I have yet to check spark.*/edit*
I have set my idle at 1K rpm. Idle adjustment screws for the 3/4 bank is almost all the way out. Idle adjustment screw for 1/2 bank several turns in. Both carbs are idling at 5 kg/h according to my flow meter. Mix screws for all 4 carbs are 2.5 turns open. When I open the throttle to ~3K rpm, the 3/4 bank only sucks slightly more air. The 1/2 bank jumps up to about 15 kg/h. So, where am I off. I have my weber tech manual too, but thought I would ask here to see if I got a faster "ah-ha" type answer (like usual). |
VaccaRabite |
Jul 5 2008, 01:39 PM
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#2
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En Garde! Group: Admin Posts: 13,456 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region |
Compression numbers - keep in mind, this is a fresh rebuild that has not seen any road time (Bench test only), so I doubt my rings are set yet. Engine was warm for the comp test.
Cyl3 115 Cyl4 105 Cyl1 115 Cyl2 122 So, the engine is making compression. The spark plugs for 3/4 are oil fouled (duh) and the plugs for 1/2 look perfect. I did leak down (engine cold) the other day, and everything was between 8% and 12% leak. Again, for a cold engine, with rings not set yet, thats not too bad. What do I want to be looking for? Spark next I guess. |
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