Plus just think of all the tight spots he can get to with those small hands, and beady eyes!! Also good for changing jets on those solenoids at either end of the carb!!! Just Sayin

So back to CFM stuff, when I first assembled my engines 17 years ago versions 1.0 in techie talk, we knew what Mr. Elkins did with the heads and pistons, we had a real good idea how the cam and headers would flow and scavenge, so Butch had me get in touch with a carb guy he knew in South Carolina to build me a couple carbs with the known engine specs 502 6k rpm. he built two wet flowed 1071 CFM carbs, they performed great but by reading the plugs I had to increase the Jets 2 sizes all the way around..(before we used AFRs to do this) so it really depends on your specific build!

gives a whole new meaning of throwing a monkey wrench in your stuff !

Here is my .02
Last year, we freshened up some 500 hp's. They were bored to 509, compression bumped to 9.5, Brodix BB2x heads (we CNC'd the chambers), decent size hyd roller cam, etc. I cut the choke horns from the stock 800 carbs that came on the 500 hp because I had a feeling that they would be too small. We only increased the engines by 7 ci. The heads were a little larger (but flow quite a bit more), quite a bit larger cam (but not crazy) and bumped the compression.

I put the first one on the dyno (full dress with wet exhaust) and after breaking it in, I made some power pulls. I threw everything at it that I could and it would not break 560 hp. Now, I'm looking for 610-625 hp. I tried all the timing in the world, leaned it down, etc. It wouldn't make more than 560 hp. I didn't have the manifold vacuum data on the printout, but I pulled it up. It showed the engine pulling over 4" vacuum at the top of the pull. This was enough to tell me that the carb was too small. Thinking ahead, I borrowed a 1050 (4150) Quickfuel from Mike Tkach. It was for a 2x4 blower setup, but we made it work. Even though it was pig rich on the first pull, it made over 610 hp. That's a 50+ hp jump from the carb. After leaning it some, it made around 625 hp. That's 65 hp over the 800. The vacuum came down to about 1.5" at the top of the pull.Needless to say, we changed the carbs. I ended up getting a 1050 Quickfuel that worked perfectly out the box. I put them on once the engines were off the dyno and in the boat. I figured that I would just tune it in the boat with the new carbs. I did not so much as have to lay a finger on them. Hell, I didn't have to even adjust the idle speed. They maintained a 12.5 AFR through the entire rpm range and 13 at idle. I never took a tool out of the tool bag. That was enough to sell me on Quickfuels. I've used several more since and only had to make some small changes to one of them. That was only because it was a fairly healthy piece.
Eddie

I remember that test Eddie. It was an eye opener!

Those quick fuels are really nice carbs , and they are reasonable.

I've had the displeasure of dealing with C&S 2 times. Horrible AFR swings thru the pulls on the last set. They were d!cked with for 2 days until a set of 950hp's were thrown on. Right out of box 50hp and about 50 torque. Better EGT's and flat AFR's... C&S = cry and scream. (I got that from another member here)

you saw how mine worked, very happy with them..

[QUOTE=Young Performance;4525542]Here is my .02
Last year, we freshened up some 500 hp's. They were bored to 509, compression bumped to 9.5, Brodix BB2x heads (we CNC'd the chambers), decent size hyd roller cam, etc. I cut the choke horns from the stock 800 carbs that came on the 500 hp because I had a feeling that they would be too small. We only increased the engines by 7 ci. The heads were a little larger (but flow quite a bit more), quite a bit larger cam (but not crazy) and bumped the compression.

I put the first one on the dyno (full dress with wet exhaust) and after breaking it in, I made some power pulls. I threw everything at it that I could and it would not break 560 hp. Now, I'm looking for 610

Now That's what I'm talking about!

Mark

Very cool.

Last go around I used AED. After getting them setup they're perfect. However, out of the box they were at least 4 jets too rich and after 3 pulls on the dyno being pig rich, I pulled a primary bowl off and both main jets were "LAYING" in the bowl... No wonder it was 10:1... Anyway, fixed that and began jetting after that and everything was good. They're still on the rich side at 11:4 but it's safe and I'm not breaking any speed records with this boat.

I don't know that they are as nice now that Holley owns them.