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If the needle on the guage was bouncing around, it can only mean 1 thing; there is some air in the fuel line. This can happen if you ran out of gas or on a new installation. As in your case, it cures itself. Happened to me.

Ah....another problem solved.

I'm puzzled. How could you have the air-bleeds in the wrong spot?

Adam, what are the jet sizes and PV ratings? What's the vacuum reading in gear and idle RPM?

In desperation, I went back to the basics and checked the timing again. Then it dawned on me to check what bushing I had in the MSD distributor, and low and behold, it was the red one (28*). My initial timing was only 12*. Changed out to the black bushing (18*) and put in 20* initial. No...

Yeah, Tony, I put on the new Eddy heads, which came with new springs. A couple of hours ago I finished it up a did a couple of short launches in front of my house. All I can say is OH YEAH! Hope to get it to the track soon.

Is this normal? I drive back to the pits and shut the engine off and a few seconds later I hear wooof - fuel igniting in the headers/collectors. It did this occasionally with my old cam, a hydraulic .501, and it's doing it with the new cam, a solid Crane 240/250@ .050 with 540/560 lift. LSA...

Walter, did you try the different spacers all during the same weather conditions, on the same day?

So, do you use a Spreadbore or Squarebore on that Turtle? I don't quite understand the science of the design.

Without a doubt, running lean causes heat. Fuel cools the combustion temperatures by diluting the air intake charge.

Does anyone here use one and are they worth it? What performance gains have you seen, if any?

Brett, I cross referenced the autolites AR3933 to NGK 7382, to Champion C59C. What do you think?

I'm using Autolites #AR3933. No on the race gas. Use Sunoco Ultra 94. Do you think the plugs are too cold? :dontknow:

Changed the squirters to a 36 primary and 40 secondary and the off idle stumble was cured. The plugs still read rich though. Gap is .045 Total timing is 38, all in by 2400 rpm. Any suggestions?

Adam, did you use a 4 hole or open spacer?

Thanks everyone for the good info. I think I'll go shopping :pr:

Looking to add a plate system in an effort to chase a lower ET. I haven't used Nitrous before and am looking for recommendations on which kit to buy (125 shot range). Thanks :scratch: :scratch: :scratch:

Thanks guys. I'm going to the strip Sunday for some T&T. I'll follow up whith what I fugure out.

Approx. 3200 lbs at the ready. Engine is a '69 383, stock bore and pistons, 906 heads (gasket matched only), 727 trans with 10" 3500 stall TCI super street fighter, full spool with 4.56 gears and 29.5" M/T slicks, Hooker Super Comps with 2" primaries and 3.5" collectors, MSD distrib and a 6AL...

Could someone explain to me when it's appropriate to mess with the squirter size, and when it's appropriate to mess with the jets? I'm somewhat confused as to their specific functions. Currently, I have a 750 Holley (flows 930) which has a 42 primary squirter and a 37 secondary (mechanical)...