Carb set up
June 24th, 2010, 06:49 PM
#1
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Join Date: Jun 2010
Location: Denver colorado
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Carb set up
Have 1970 olds 442.455 with C heads ported and milled.Cam 230 238 @ 50,523 544 lift.10.5 to 1 compression.Have eb 1407 carb out of box.Car falls flat when u give it gas.Almost and some times stalls.Old carb 850 double pumper. 86 88 jets larger squirters, stock squirtes were not enough.Use to stall.Differnt Carb looking for suggestions beside go back to 850.I am in Denver
Last edited by B442john; June 24th, 2010 at 08:15 PM.
June 24th, 2010, 07:05 PM
#2
1972 Cutlass 455
Join Date: Feb 2008
Location: Baltimore, MD
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I looked into that carb before I got my qjet rebuilt. Edlebrock says it is jetted out of the box to bolt onto 454's and 460's, so if it is stumbling to the point of stalling, I don't think that jets would be the problem. Have you done all the normal stuff like check for vacuum leaks, and timing? Fuel pump/filters? I have also seen out of box carbs come with their fair share of crude inside them. I would check to make sure you are getting a good strong fuel supply to the carb before you worry about rejetting.
Last edited by silverriff; June 24th, 2010 at 07:07 PM.
June 25th, 2010, 04:57 AM
#6
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Location: Calgary Alberta
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The Edelbrock should run right out of the box but it still needs to be tuned...if you read the booklet supplied you need a set of jets and needles to tune it to your vehicle...I welded a bung for a AEM AF/ratio gauge in my exhaust pipe near the manifold and used that to tune my ede 1411 (built 455 but only 9.5 to 1) works great now!
June 25th, 2010, 02:44 PM
#7
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Location: Denver colorado
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Carb
Thanks everyone for feed back.Scott I also have an adapter hooked up to my header to use o2 sensor from Edelbrock I am going to order one.Bought calibration kit.Also went to check if Distributor was tight got full juice through my arm from MSD box. So I bought new cap.Also anyone from Denver to give me idea for starting point on jets.Thanks again
June 26th, 2010, 01:53 PM
#8
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Location: Calgary Alberta
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Hook up the A/F ratio gauge and use the readings you get to compare with the charts supplied by edelbrock in the manual that came with the carb. The chart will tell you exactly which rods and jets to use according to the readings...beats trial and error...
June 26th, 2010, 05:57 PM
#10
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Posts: 302
I would probably try tapping the float bowl with a screwdriver, that is what my Edelbrock manual says to try to get rid of debris in the needle and seat. If that does not work it says to run while pinching fuel line off until engine dies, then restart it. I was just reading through my manual yesterday.
June 28th, 2010, 08:57 PM
#11
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Location: Denver colorado
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Hey guess what.I figured it was the carb.I guess I figured wrong.It was the Distributor,I grounded it to the intake.When I switched it to the firewall problems disappeared.Guess it wasn"t good enough ground.But thanks everyone for feed back
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