We love the calibrations on the Proform race carbs. Very close out of the box. We have had trouble with the QF carbs lately. Got a 950 on the shelf right now, nearly new, I will sell you for $550.
At least for the Q series, they use the same components as the Proform "Race" models of the same size, except the QFT base plates have slabbed throttle shafts and maybe a different linkage. They even come with the same tune, from everything I can find out. Not sure why the same size in one brand should run differently than the other brand.
Thanks for the offer, but my carb cup runneth over already.
I didn't say they are the fastest, but they are not bad out of the box. I had a PS carb I couldn't make work on my 512 or anything else for that matter. Custom "Built" for my engine blah blah blah......Well, it took two seasons to get it right, and what I stumbled on was a pretty good tune up on that 4150...Found a couple tricks that the car really liked. Mine was better by .1 than most 4150 carbs.
Put a lot of carbs up against it, and only 1 actually beat it, ....Not a 4150, but one finally bested my carb. That was Thumpers 1050 4500 carb he built for me. Now I had to jet up some because I use pump E10 and tweak a couple of things....But it beat my best carb, by .08 and 2mph when all was said and done!
And next season, we are going to shatter all my records with that car!
