Re: Edelbrock carb tuning question.
[Re: RapidRobert]
#630735
03/04/10 10:26 PM
03/04/10 10:26 PM
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Joined: May 2003
Posts: 15,487
Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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bump up the timing and use tha vac gauge to get the highest vac reading that will get you in the ball park I can stomp mine on the 318 from an 850 idle and it wont skip a beat all the way to 5000rpms never got the eddie 750 to do that  adjust the rod for the biggest pump shot on the AP
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Re: Edelbrock carb tuning question.
[Re: Lefty]
#630738
03/05/10 03:06 PM
03/05/10 03:06 PM
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Joined: Jan 2003
Posts: 7,798
Lyons, CO
MileHighDart
master
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master
Joined: Jan 2003
Posts: 7,798
Lyons, CO
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Quote:
I would try to increase the accelerator pump shot first. Also, make sure the accelerator pump diaphragm is not leaking or torn by removing it and looking.
Edelbrock sells calibration kits for the carbs they sell as well as having a good tuning guide in the manuals.
http://www.edelbrock.com/automotive_new/mc/carbs_acc/access_calibrate.shtml
http://www.edelbrock.com/automotive_new/mc/carbs_acc/pdf/carb_owners_manual.pdf
Bingo, I bought one of their tuning kits, that comes with different size jets and metering rods, and a tuning guide to help you figure it all out. I had to tune for high elevation.
I had the same "stumble" problem your talking about, and cured it my changing jets and rods and studying the tuning guide.
You of course have to take the top off the carb to change the jets/rods. Just remember to reconnect your fuel line before firing up the engine, you could set your engine on fire ! dont ask how I know 
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Re: Edelbrock carb tuning question.
[Re: MileHighDart]
#630740
03/05/10 03:20 PM
03/05/10 03:20 PM
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Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
patrick
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,123
Grand Haven, MI
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Quote:
Quote:
I would try to increase the accelerator pump shot first. Also, make sure the accelerator pump diaphragm is not leaking or torn by removing it and looking.
Edelbrock sells calibration kits for the carbs they sell as well as having a good tuning guide in the manuals.
http://www.edelbrock.com/automotive_new/mc/carbs_acc/access_calibrate.shtml
http://www.edelbrock.com/automotive_new/mc/carbs_acc/pdf/carb_owners_manual.pdf
Bingo, I bought one of their tuning kits, that comes with different size jets and metering rods, and a tuning guide to help you figure it all out. I had to tune for high elevation.
I had the same "stumble" problem your talking about, and cured it my changing jets and rods and studying the tuning guide.
You of course have to take the top off the carb to change the jets/rods. Just remember to reconnect your fuel line before firing up the engine, you could set your engine on fire ! dont ask how I know
top can stay on for rod/spring changes(loosen cover screws and rotate cover out of the way), not jets....mine, I have a 6-8" rubber hose from the fuel hard line, so I don't need to disconnect it.
check and make sure the floats are the right height, and play with the acc pump positions. the nearest hole to the body gives the biggest pump shot. what is your idle and cruise vaccuum? odds are, you'll need to swap out the step up springs to the stiffest ones.
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Re: Edelbrock carb tuning question.
[Re: Six Popper]
#630743
03/05/10 08:15 PM
03/05/10 08:15 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Quote:
I didn't get a chance to work on the carb today, I spent most of my day after work putting a injector harness on my father in laws F250 Yuck. I did fix my header leak though. I will get a vacuum gauge tomorrow and start there, I will also look into getting one of Edelbrocks tuning kits. I like the idea of haveg a assortment of metering rods springs and jets. We don't have a local dealer so if I were to buy them one at a time guessing what I needed I would spend a fortune in shipping. Thanks for the help guys.
change your metering rods to a smaller number like a 6552, that will richen you up off of tge primaries gradually progressing into your secondaries. you also need to find out what metering jets you have in there. also put the accelerator pump in the top hole.for more pump squirt.
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I have a mild built 360 with a 650 Edelbrock carb it runs pretty good while only in the front two barrels, but when you step on it it stumbles puffs a little smoke then picks up and goes. The engine is not a fresh build but isn't wore out by any means. I am going tomorrow to get a vacuum gauge but I won't lie I am clueless as to how I need to tune it properly. I would like for it to run crisp if that means running a smaller carb then thats what I'll do, but I'm positive this carb should be tunable to acomodate this engine. Thanks in advance Chris.
Well I have an eddy 1406 (elec choke) on a stock 318 and it stumbles/runs lean and I have not got it worked it out. float level is right and the AP squirts immediately. Gonna play w rods/jets/springs and the choke some more. Plus try my 1805 (600 cfm) holley 
