Dyno,
Good to hear from you. I am running EMI exhaust. I am still running a Q-jet, and everybody except a few are telling me thats why I lack top end. I have power getting on plane, good midrange, but I hit a brick wall at about 4600 RPM. So I am going to give in a buy a 800 CFM Holley this winter and try that in the spring. I'm all ears!:confused:

Whiteknuckle it sounds like we are very simular in our set ups I'm at 9.5 to 1 and am using a 850 holley with an rpm intake......I've tried a single plane but did'nt like it the power band was too high I wanted to stay under 5200...the 800 holley works better than my 850 we dynoed SuperV's and it made 505 hp at 5500

Very similar here too, Except Im using 780's with a single plane torker 2 intake and Gils. The 850's didnt run any better WOT, idled and started bad and used a ton more fuel. I dont know how to work with Quads but I had the same result as Whiteknuckle did with the stock ones. The Quad maxed at 4700, the Holley ran 5400, everything else the same.

I've mentioned this before, but when we dyno'd the engine the first time, (with big valve peanuts) and the q-jet, the engine acted like it needed more cam or fuel. We then put a 830CFM Holley that was tricked out for a Busch Grand National engine, and bingo, it jumped 41 HP. Of course this carb would be impractical on a boat that requires decent low end and idle situations, but the I figured in my own dumb ass way that I just was not getting the full benefit of the Q-Jet. Now after two seasons of fooling with it, new 049 heads with big valves, new Ultradyne cam, that maybe its the Q-jet that not getting the job done. Actually it ran just as strong with the peanuts, with sharper midrange.

I know Dennis Moore is a strong supporter of the Quad and hates Holleys and I am sure there are people who know how to trick out Quads but Im not one of them. I know how Holleys work and how to set them up and I never had any luck with Quads.

Formula31, you are correct.
Dennis Moore is one of the reasons I have persisted in trying to make this q-jet work. The carb has been worked over by people that are in business and specialize in modifing Q-jets.
I'm not blaming my lack of top end performance on anyone but myself, as I make the decisions, however I fell for the carb sizing routine, that actually figures mathmatically that this 750 CFM Q-Jet is oversized for my 461 cu in engine.
For $500.00 or so bucks, I'm going to try the 800 Holley.

Since I am using vacuum secondarys and single acceperator pump, it took a few years before I found the right combination of jets, pump size, cam size, squirter size, power valves, springs etc. but now it starts and runs like its injected. Without a choke. You wont be dissapointed with the holley I hope. They dont make them like they did in the 60's any more.

I bought a couple 850's on ebay for cheep!!!

Whiteknuckle, long time no talk. I also like the Q-jets but I think the Holley 800 or 850 is a good carb in your application. Dyno's, as well as SuperV's, engines perform very well with the Holleys. Both of those guys have their jet and powervalve info written down.

Crazyhorse, How ya doing?
Hey, I'm humble, I'll accept all information on tuning I can get. Any suggestions on setting up the new Holley are welcome. It is sold as "standard marine calibration" so I guess that is a good starting point.