Holley hot stop fuel perc issue

[Gaz64]

Here's the pic I posted in post 9.

http://www.bob2000.com/acccheck.jpg

Do you see the blind hole at 11 o'clock in the right hand bowl?

That's where the pump chamber vent used to be, but obviously Holley isn't doing it anymore.

The rubbish on the other forum would do nothing if the hole is there as he claims.

Both of the holes under the umbrella are inlets to the pump chamber.

Cutting a groove joining a .013 hole to a .100 hole just going to reduce pump shot further than what you already have since more will bleed back to bowl.

The size of the bleed is a balancing act. No bleed gives full pump shot but no venting. I probably wouldn't exceed .020.

[DanEC]

For what ever reason he apparently decided to grind a groove back to the feed hole under the umbrella seal - instead of drilling out the auxiliary vent hole. Not sure I buy into that either. Prefer to get the temperature of the accelerator pump cover down a few degrees in hopes of keeping fuel in it below it's vapor level. It may only take lowering it a few degrees to make a difference.

[DanEC]

eI bought a couple of Mr. Gasket carb insulator kits with the aluminum heat shield and worked today on trimming them to fit around all the stuff on this low riser dual 4bbl intake and the carb vacuum secondary linkage.









The whole stack of aluminum plates and gaskets totals about 7/16 inch which is a bit more than I have room for. I plan to leave out one aluminum plate and corresponding gasket when I install it. Hopefully the rain will cooperate tomorrow and I can try it out.

[Gaz64]

Looks great.

You should only need one gasket on either side of each heat shield.

Don't know why Mr Gasket gives you all that extra stuff.