another edelbrock 1406 question...
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Post Fiend
Joined: Aug 2006
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Likes: 7
From: Yorkton Sask
another edelbrock 1406 question...
almost a general carb question i guess... is there any way to figure out what the air/fuel ratio is to compare it with the chart in the edelbrock owners manual??
another thing... great idle, ***** when kicked down 3/4 throttle, stall when floored, and shudder when lightly accelerating... any hints?? i've ordered the tuning kit from edelbrock, as well as a new ignition coil just in case the old one was getting weak...
any help is greatly appreciated!!
another thing... great idle, ***** when kicked down 3/4 throttle, stall when floored, and shudder when lightly accelerating... any hints?? i've ordered the tuning kit from edelbrock, as well as a new ignition coil just in case the old one was getting weak...
any help is greatly appreciated!!
Postmaster
Joined: Mar 2005
Posts: 2,949
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From: Earth
An A/F meter is about the only accurate way. You can get a decent one for ~$200. For that you might consider spending a bit more and dyno tune. And a vacuum gauge in the cab can help you figure out which springs will work best.
Are you getting any surging at cruise? It sounds like you might be running a bit lean. You could try cranking the mixture screws out 4 or 5 turns to see if it fixes the shudder at part throttle - it won't idle but it should help the cruise if it's lean. If it works, reset the idle mixture and go with a richer set of rods for starters.
Where is your timing set? How much total advance and where is it all in?
Are you getting any surging at cruise? It sounds like you might be running a bit lean. You could try cranking the mixture screws out 4 or 5 turns to see if it fixes the shudder at part throttle - it won't idle but it should help the cruise if it's lean. If it works, reset the idle mixture and go with a richer set of rods for starters.
Where is your timing set? How much total advance and where is it all in?
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Post Fiend
Joined: Aug 2006
Posts: 20,099
Likes: 7
From: Yorkton Sask
thanks for the reply!! i'll skip the a/f meter... 200 is a bit much for something i can do by ear, but i would like to dyno it sometime...
i've narrowed the rough running to the a/t rod needing adjusting. local carb guru told me to try that.
not sure of the timing, i've got to get a timing light and check that out. thanks again for your reply!!!
i've narrowed the rough running to the a/t rod needing adjusting. local carb guru told me to try that.
not sure of the timing, i've got to get a timing light and check that out. thanks again for your reply!!!
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Post Fiend
Joined: Aug 2006
Posts: 20,099
Likes: 7
From: Yorkton Sask
thanks jimmy, i actually found a post where you had suggested that before. i did that on sunday and it cured my off-the-line problem. swapped my plugs today for something a little hotter, got an MSD ignition coil to put on tomorrow... might still check the timing, something isn't right with the part throttle calibration...
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