stalls on hard stops or turns

My AED carburetor did that. When I contacted AED, their response was, yes, the bigger carburetors will do that. They could fix it, but it would reduce performance. The HP Holleys have that fix. I have an E-mail from AED about that. I'll have to dig it up.

 

I E-mailed AED about this back in March of this year. Here is his reply. Not sure if it applies to your carburetor Mike, but it might.

Hi Larry:

You are absolutely right about this problem. Here’s what’s going on. When you get on the brakes g-forcs is actually pushing fuel through the rear main jets up the main well in the metering blocks then through the boosters. Since the throttle is closed it’s actually flooding the carburetor a bit, or richening up the mixture at idle under the braking conditions. It’s much more of a problem with larger carburetors because of the bigger jet area letting more fuel through. Holley actually makes a metering block they used on 850’s years ago (maybe they still do) that has a 90 degreee cross well that makes it harder to pull fuel through. It works ok, but it kills performance, by a tenth or more, since it’s harder to pull fuel. Another option is using a rear power valve Larry so you can reduce the rear main jets. This will help but if you see a fair amount of g-force on launch you can have a lean spot as the power valve becomes uncovered by fuel. So a bit of a catch 22. Since most of our 850’s & 1000’s are used for pro-street/ bracket applications we take the safe route. If you don’t use slicks on your car, & have a good fuel pump, & you want to make this better you can install a rear power valve & jet down the secondaries about 8 jet sizes. This will help. Also a little higher idle speed & a little lower rear float setting. Hope this helps Larry. Let me know if you have any questions. Your new engine sounds pretty impressive!!!



Take Care



John Dickey

AED Performance

2530 Willis Rd.

Richmond, VA 23237

804-271-9107 Ext:11

jd@aedperformance.com

www.aedperformance.com