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edelbrock 1403 500cfm on new 292 y-block

Posted By ianmatt 8 Years Ago
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ianmatt
Posted 8 Years Ago
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Howdy folks,

Well I finally have my truck running after a full engine rebuild. Its a 59 292 bored.060 with a mummert aluminum intake and headers. It has a mild cam. 
My question is I had it over carbed I think with a 625 street demon carb. So the engine builder recommended a edelbrock 1403 500cfm carb with a 1" open plenum spacer. I live in Longmont CO and we are 4,984 feet above sea level. Anyone out there live in co and tune this carb for a y-block. I have tried every different spring and the strongest ones ( silver ) seem to work best. For the jets Edelbrock recommended 83 jet for primary and 92 for secondary. I tried several different metering rods and the stocks 6552 seem to be ok. The truck seems to have a small bit of lag when you really get into it. Its not a stumble but the pick up i not instantaneous. Any other tuning hits would help tons. Thanks folks.
miker
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Posted 8 Years Ago
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Whoa! 7" of vacumn at idle isn't a mild cam. It's either a big one or there's a vacuum leak. Or something else. Better post the cam specs and any other pertinent info.

As an aside, if someone at Edelbrock told you to do something other than what the tuning manual said, I'd be skeptical.

miker
55 bird, 32 cabrio F code
Kent, WA
Tucson, AZ


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