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: 13,465 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). |
Joe Bob |
Jul 6 2008, 12:16 PM
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#2
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Retired admin, banned a few times Group: Members Posts: 17,427 Joined: 24-December 02 From: Boulder CO Member No.: 5 Region Association: None |
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One thing I have found...and it really pisses me off...is that age has robbed me of the ability to see in low light. I was changing the oil on the wife's Volvo and I assumed that the gasket was seated right on the oil canister. It wasn't....farge it....not the Exxon Valdez but a solid drip at idle.... So, to sum it up, check the baseline. Use good light, take your time.... Gaskets, cylinder compression, proper plugs and gaps, float levels, clean jets, proper sized jets, jets that haven't reamed by someone else to a larger size (yes that happens!) Intake leaks at the base can be a problem and are hard to see...even with good eyes. Take carb cleaner or quick start and LIGHTLY spray at the base of the carbs. Any idle change and you have an intake leak. |
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