Engine stall on hard braking (demon carb)- HELP

[CHANMADD]

in all honesty these are not fuel injected computer controlled cars, and as such we should not expect them to be as smooth and troublefree as a modern car.
My carb ,I think is setup pretty close to ideal. I do however always change down gears and blip the throttle to clear the cylinders of the excess fuel that sloshed into the intake when I just hopped on the brakes, after accelerating so fast just a few seconds ago that I left huge black stripes on the road.......
You all know what I mean!!!!
john

[Grubby]

Demon Tech support did offer some good advice. The tech spent some time walking me through the base plate adjustments.

I just finished readjusting the carb. It now idles well with both primary and secondary transfer slots exposed about .015. I made sure the primary and secondary transfer slots were equally exposed. I am getting 14-15 inches of vac at about 900.

The Demon carb impresses me with its overall driveability. The only issue has been the stalling.

I am feeling pretty confident that things are now pretty close. Unfortunately it is raining here today and the rest of the week. I will post results when I get to road test it again.

John

[Grubby]

Results from todays road test.

1. Off idle is good. No sign of detonation. I put a vac hose on my stethascope and laid it on the intake for the test drive. WOT is the most powerful I have felt with this engine. Everything works really good. The engine pulls hard to 7000 rpm.

2. During full braking the engine will die. Anything short of a panic stop and it will not stall. I think it is pretty close.

Jim's settings worked pretty well for me.

I now have 16 degrees initial timing with 38 degrees total. My vac advance is hooked to full manifold vac below the throttle plates.

Both floats are set at about 1/4 above bottom of the sight glass. Both transfer slots are exposed about .015". I get 15 inches of vac at 900 rpm idle.

I am some what concerned about the amount of total timing advance. I will call Demon and Edlebrock tech lines on Monday and see if they know how much total advance worked well in their test mules.

John

[jhv48]

Grubby, if it runs good and pulls hard and you don't hear any kaboom noises, then your timing is ok.

I run about 18 degrees on my motor even though the builder set it initially at 15 degrees. Some motors like more timing, others don't.

Check your plugs just in case.