Re: Carb suggestions, looking at going Holley
[Re: Belvedere1]
#2421205
12/19/17 11:30 PM
12/19/17 11:30 PM
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Joined: Jul 2004
Posts: 19,317 State of confusion
Thumperdart
I Live Here
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I Live Here
Joined: Jul 2004
Posts: 19,317
State of confusion
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Not quite but should work..........
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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Re: Carb suggestions, looking at going Holley-Update
[Re: Thumperdart]
#2421234
12/20/17 12:03 AM
12/20/17 12:03 AM
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Joined: Jan 2003
Posts: 1,261 Phoenix, AZ
Belvedere1
OP
pro stock
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OP
pro stock
Joined: Jan 2003
Posts: 1,261
Phoenix, AZ
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I agree, as long as its not less than 800 I don't really care.
Update:
I got the carb on and the car running again. It runs great right out of the box, the one and only adjustment was the idle speed. The float levels were spot on too. It was tweaked slightly from the box stock settings by the guy I bought it from. It seems that he nailed the settings. Jet 78/86, 4.5 power valve, rear blocked, idle restrictor .037, idle bleeds .030, high speed .073, 35 squirters front and rear, 30cc cam in front and 50 in rear. The only issue that is still there that I had with the Edelbrock 800 is at a warm idle when the engine starts to shudder like it drops a cylinder then picks back up again. The idle is better with this carb but the shuddering is still there. I'm at a loss from where to go from here on that.
Last edited by Belvedere1; 01/03/18 08:59 PM.
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Re: Carb suggestions, looking at going Holley-Update
[Re: AndyF]
#2429376
01/05/18 11:06 AM
01/05/18 11:06 AM
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Joined: Jan 2003
Posts: 1,261 Phoenix, AZ
Belvedere1
OP
pro stock
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OP
pro stock
Joined: Jan 2003
Posts: 1,261
Phoenix, AZ
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The baffling part is that its just the idle only but anything is possible with electrical issues in my experience. I started down that road a few months back with swapping to an old known good orange box and a stock coil with no change. I'm using a chrome box and an MSD Blaster coil. I'll see if a buddy of mine still has his scope at his shop.
Last edited by Belvedere1; 01/05/18 11:10 AM.
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Re: Carb suggestions, looking at going Holley-Update
[Re: Belvedere1]
#2429657
01/05/18 10:27 PM
01/05/18 10:27 PM
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Joined: Feb 2005
Posts: 4,311 Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,311
Prospect, PA
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......The only issue that is still there that I had with the Edelbrock 800 is at a warm idle when the engine starts to shudder like it drops a cylinder then picks back up again. The idle is better with this carb but the shuddering is still there. I'm at a loss from where to go from here on that. Can you add some more description around this? Not real clear what happens and when.
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Re: Carb suggestions, looking at going Holley-Update
[Re: Belvedere1]
#2430036
01/06/18 04:41 PM
01/06/18 04:41 PM
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Joined: Jul 2004
Posts: 19,317 State of confusion
Thumperdart
I Live Here
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I Live Here
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Posts: 19,317
State of confusion
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You can buy the clamp to the exhaust deal or just chassis dyno it then tune to suit your needs but even dynos run WB's it's the BEST and you're guessing otherwise............
Last edited by Thumperdart; 01/06/18 04:41 PM.
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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Re: Carb suggestions, looking at going Holley-Update
[Re: Belvedere1]
#2430038
01/06/18 04:42 PM
01/06/18 04:42 PM
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Joined: Feb 2005
Posts: 4,311 Prospect, PA
BSB67
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master
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Prospect, PA
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At anything from just a couple minutes after start up to just about 180 on the water temp gauge the idle is smooth or as smooth as it can be given the cam with a very consistent idle. When the temp gets to normal operating the idle rpm in gear will get a little erratic almost to the point of it feeling like it drops a cylinder and picks back up and then feels like a miss again, and on and on. In gear idle is around 800 and in park it will smooth out slightly at around 1000 to 1100. The best vacuum reading I get is 10 with an initial timing setting of 20. I thought the problem with the old Edelbrock carb was it not getting a decent vacuum signal causing the metering rods to bounce up and down and the carb to hunt between the idle and main circuit. This new carb made things overall slightly better. Okay. Thanks I still would not rule out a vacuum leak, but I'm thinking you simply need to get into the weed on your idle tune-up. That size cam at 800 rpm in gear needs to be right, IMO. Without an A/F meter, I would maybe start with a bit more initial timing (make sure that it is not moving between 800 and 1100 rpm too) and try a bit fatter. The only vacuum leak method that always works for me is the simple hand over the carb test.
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