Re: Quick Fuel 780 SSR carb
 

Adger, Your right on the secondary metering blocks ! 3310-1-&-2 !..........John

Re: Quick Fuel 780 SSR carb
 

I never knew a 3310-2 was a 780 c.f.m with a secondary rear metering block. I thought any thing after 3310-1 was a 750 c.f.m with a plate. I will keep a eye on the -2 next time at a swap meet.

Re: Quick Fuel 780 SSR carb
 

Adger - You are basically right. The change to the plate and straight boosters was part of the production definition of the -3 and later carbs. I have seen a -2 carb with straight boosters and a block though.

Then there is the original "3878261-EH LIST-3310" carb that was the start of it all . . . .

Re: Quick Fuel 780 SSR carb
 

I thought that carb was legal only in SS. Is it a legal replacement for a 780 in stock?

Re: Quick Fuel 780 SSR carb
 

Maybe two years ago I asked IHRA for an approved carb list and they said the just used the NHRA list.

Bill

Re: Quick Fuel 780 SSR carb
 

Thanks guys, you saved me some time going back over to the shop. I've used it wisely... Working on my race car. I've spent all morning going over my car. I'm trying to get all those little things that never get fixed or looked at taken care of. Someone on here talked about a T-brake tripping at the wrong time. I got to looking at my switch and figured out I was having a similar problem. my T-brake activated going up on the front end lift and going across the parking lot to load up and leave the alignment shop. You know, just a momentary thump/stumble type of apply. Well, best I can tell the little micro switch was set up in the button with partial travel already used up.
I could move the plunger less than .010 and the V/O meter would indicate a circuit. I think the odd /harsh vibrations of my little "V6" was shaking the switch enough to make a intermittent circuit. I took it all apart, moved the slope on the rod .040 and took the diameter of the rod where the switch roller rubs down to .340 depth. the switch lever starts to make contact @ .319. so I now have approx .045 travel in the plunger before the switch completes the circuit. (running SS I don't need the instant apply like a super class car) I also have the switch roller in a position where it is not touching anything when the switch is at rest. My thought there is no harmonics going through the switch lever. Well, I'll try to check it out next weekend. I think I'm going to find that thread and add my findings.

Re: Quick Fuel 780 SSR carb
 

Were you running the carb with or without a power valve.

Re: Quick Fuel 780 SSR carb
 

Kirk,
The new David Cook (DC Carbs) 3310-1 carb I'm trying out has a PV in the front and blocked in the rear. It is not the .025 over bore version and had a nice fuel curve. Of course the jetting is not square F to B , but the fuel flow- A/F ratios look good. Up to now I've always run a std bore # 4779 750 by Da Vinvci. I'm not a big fan of PV's but this is the way he sent it and I'm going to try it that way. It does stay clean when idling and at low RPM.