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Old 03-20-2017, 05:00 PM
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Engine bog at wot and stall at hard brake

I tried adjusting the floats to cure a stall on heavy braking and it helped but not enough. I have an Edelbrock 650 on a stock crate sbc 350 I adjusted the float to 7/16 up and 15/16 down and if I do a panic stop it kills the engine. Also when I wot sometimes it sputters and seems to bog. I floor it and its like it takes forever to speed up. What's also weird is sometimes at wot the rpm will go up and then jump as if I pushed the pedal harder. What does all this mean? I am considering just taking it to get tuned but this shouldn't be that hard,

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Old 03-20-2017, 09:14 PM
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Originally Posted by hcompton View Post
Mine car did the same thing when it had too much fuel pressure the eddy carbs only like 5 psi max pressure. If you got 6-9 psi it will flood out at wot and when you hit the breaks or take hard sharp turn.

Do you have a pressure gauge and regulator.

Hope this helps.
No I don't have a regulator nor have I put a tester on it yet but I do know that my pump shouldn't be pumping that much pressure but then again... Here is the pump I bought. It is a Carter M4685 https://www.summitracing.com/parts/crt-m4685 They claim it maxes out at 6.5 psi and since Edelbrock doesn't recommend going over 6.5psi I thought it would work. I have a Vacuum gauge that says it can test fuel pressure. How can I use this? Just push the end of the gauge's hose into the outlet hose on the pump and clamp it?
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Old 03-20-2017, 09:28 PM
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Quote:
Originally Posted by fang508 View Post
No I don't have a regulator nor have I put a tester on it yet but I do know that my pump shouldn't be pumping that much pressure but then again... Here is the pump I bought. It is a Carter M4685 https://www.summitracing.com/parts/crt-m4685 They claim it maxes out at 6.5 psi and since Edelbrock doesn't recommend going over 6.5psi I thought it would work. I have a Vacuum gauge that says it can test fuel pressure. How can I use this? Just push the end of the gauge's hose into the outlet hose on the pump and clamp it?
yes, i have the same pump for all my edelbrocks and have no problems. i put the gauge on the end of the fuel line an crank it over an they read 5 to 5.5 psi. i buy the pump listed for a 1970 camaro with 307 2 barrel, they are rated at 5 psi.
if your pump reads 5 or 5.5 psi then id say your float drop and level need adjusted. just about everyone ive bought new needed it done.
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Old 03-20-2017, 09:36 PM
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also i move the rod to the accelerator pump to the bottom hole. i know the book says thats less fuel but it took the bog out of a couple i had.
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