Yeah, that sure is true. My 8 gallon fuel cell used to last through 3 time runs and 3 rounds of racing. Now I'm filling it up after warm up and time runs.

Yea it got kind of annoying lol, but I loved that TR!

I ran a tunnel ram on the street with a matched set of 750 dp's with no problems except spark plugs fouling probably due to low RPM's. On the track they worked great

OK that's nice to know 750's won't be too much carb. With the tunnel ram wont be ready in time for Dyno day, but I can put it on a chassis Dyno when its done.

Bill Jenkins (if anyone but me remembers the fastest small block engines on the planet at the time?) remarked 40 years ago that the carburetors and plenum volume that produced the highest steady-state power on the dyno are at least 10% too big for best acceleration.

I'm running two 660's that flow about 690 each. They have 50 cc pumps. They are on a 440 that is an old school build. Still haven't gotten all the bugs out yet. This is the best pair of carbs I have had on this engine yet.

Many racers out there that like their 660's. I asked Mark about them and he didn't have much to say. Besides the center squirter and straight boosters what makes them so different or better than a 650dp?

Well, if the 750's are on the edge of being too small than they should work well on my combo.

You'll be happy with 750 double pumpers. I don't know how necessary it is, but my Quickfuel carbs were custom calibrated for a TR and had wedge shaped floats for a TR with sideways mounted carbs. They were pretty much spot-on right out of the box.

Cool! Do you know what qf put in them for IFR and main jets? Square jetted or PV out of the box?

I have had very good luck with custom QF carbs over the years. ALthough, they are under new ownership now correct? I have not bought one since the change, but I would be curious to know. I still use a lot of they're parts over Holley stuff.

I took the road less traveled and used a pair of 850 thermoquads. 18 dyno pulls later they were dialed in. They made about 40 hp more than a 1140 dominator on my 605. Torque numbers were better from the start of the pull all the way to the end. IF I drive it nice, I've been able to see 10mpg. I'll never go back to a single 4bbl. Dave

I no longer own the car, I know I ran them square jetted with no power valves but I can't remember if they came that way. I'll try to see if new owner still has the build sheets for the carbs.
I'm sure he'll know what jets are in them.

Dragula, I did not know Quickfuel was under new ownership. I wonder if some of the guys stayed.?

Just curious to your specs. Mark said he would help me out with the tune on the ultras. Thanks

sounds read good. thanks for all the good info guys. now i'll get these ordered

Just put a pair of 950 TRE carbs on my 528 street strip Cuda and Love it, still have some bugs but picked up about 40hp over dominator and went 608 rwhp.
Did have a little trouble starting it but I turned off the start retard so it's all in 34deg and now fires up great, I would also say it feels better on the street.

Go for it.

I believe it is simply that they are well calibrated to a tunnel ram OOTB, and the 1:1 linkage works well for fuel distribution

Once you say "no power valves, no vacuum advance", a question about mileage is pointless.

who cares about mileage. i just want to go fast and look good doing it. i finally got the carbs ordered. what a pain that was. got them refurbished for $650ea thru jegs, but will be drop shipped from holley. i would have liked to try the 660's after reading all the good reviews on them, but Marks responce on those left me thinking he didnt think much of them. just my opinion.

oh, these will have pv when street driven and square jetted while at the track.