Help car drops 700 rpm when going from neutral to first gear

[ollucky]

Originally Posted by 1320racer

how's the carb setup/baselined...how/where are the floats set, same question for transfer slots? What is the idle set at? Also how much fuel pressure?

7 1/2 psi

[1320racer]

before you say the floats are fine do this...remove the bowls, invert them and slide a 3/8" or 7/16" drill bit along the roof of the bowl and the top of the float, adjust as necessary.

As to the transfer slots...take the carb off, turn it upside down and look at the slots that are in the wall of each bore. The baseline setting should be about .020 measured with a feller gauge and they should look like this [ ], partially covered by the throttle bore blade(s).

After checking/setting the floats and transfer slots, reinstall, set idle mixture screws, then set idle screw.

7 1/2 is to much, lower it to 6 1/2 for a baseline. If your fuel gauge is liquid filled, get rid of it.

Just confirming, you have no mechanical advance in your distributor?

[ollucky]

Originally Posted by 1320racer

before you say the floats are fine do this...remove the bowls, invert them and slide a 3/8" or 7/16" drill bit along the roof of the bowl and the top of the float, adjust as necessary.

As to the transfer slots...take the carb off, turn it upside down and look at the slots that are in the wall of each bore. The baseline setting should be about .020 measured with a feller gauge and they should look like this [ ], partially covered by the throttle bore blade(s).

After checking/setting the floats and transfer slots, reinstall, set idle mixture screws, then set idle screw.

7 1/2 is to much, lower it to 6 1/2 for a baseline. If your fuel gauge is liquid filled, get rid of it.

Just confirming, you have no mechanical advance in your distributor?

Distributor is locked.

[1320racer]

transfer slot(s)

[SSDart]

Originally Posted by 1320racer

transfer slot(s)

Equalize your back transfer slots as so they are close to the front. In other words open up your year blades ,so you can close your front. You may even need to drill bypass holes in the blades.
Showing too much transfer slot can and likely will give you hard starting issues once the engine has had some heat in it.

[1320racer]

with his big cam and tight converter, i would bet he will need to drill the throttle blades if not already done.

[SSDart]

Originally Posted by 1320racer

with his big cam and tight converter, i would bet he will need to drill the throttle blades if not already done.

It would be the best starting point......... to drill the blades......

[1320racer]

it's best to setup the carb properly first. THEN if the problem is still there, drill the throttle blades and reset the idle mixture screws, followed by the idle screw.

[ollucky]

Originally Posted by 1320racer

with his big cam and tight converter, i would bet he will need to drill the throttle blades if not already done.

Throttle blades are drilled

[SSDart]

Originally Posted by ollucky

Throttle blades are drilled

All four? How big are the holes? If the holes are too big they can create issues also