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Regardless of whether you choose the one I recommended or not, I really think a cam with smaller duration numbers will actually make your power go up and come further down in the RPM range, if that makes sense.

I think that 484 cam is the reason compression pressure is low, BUT you need to understand cranking pressure really doesn't mean much. It's nice to see strong numbers, but like everything else, there's a bell shaped curve. Compression pressure goes up with RPM to a peak and then falls off. This...

On your carburetor. There's certainly room for improvement. Carter knew this when they came out with the AVS as an improvement over the AFB. Look at where the secondary vacuum door location on each carburetor. On your 750 AFB, the door is below the boosters. The AVS improved this design by...

You gotta love it!!!

I hate to say it, but Bigal is right. The 400 is way cheaper to build to withstand that power level. Do the math.....literally. You'll see.

That's badass Doug. I love the intake.

I try not to be stupid, but my knowledge with head flow is really non existant, that's why I ask questions. I like to better myself. Thanks for the explanation, Jim. I promise I'm gonna give you a holler......I got a lot goin on right now and I need to have some time on phone.

Not trying to stick my nose in here, but I have a valid question for the subject, I think. I have always been under the impression that hand porting (by a known good porter) was actually better than CNC porting. Am I out in left field with that? Just looking at a CNC ported head VS a hand ported...

Send a PM to poster number 5, cause that's Jim.

Jim Laroy. Nuff said.

It's not a bad cam at all. People use it in applications where it is too big.......ALOT. That's where the misconception is. You really need 11.1 and up compression to run it. You can run it at lower compression, but it is not very efficient. It bleeds off a LOT of cylinder pressure. That's why...

Yeah but to inspect um that close he has to buy um. I don't know dude. With no flow sheets I think I would pass. You could add some to the purchase price and get the 452s worked and KNOW what you have.

You said wack.

Womanator, I would certainly think you could be used as a benchmark of sorts. You say 650 at the tires. I don't doubt it. What would you think? 725-750 at the crank?

Cool thread. I had no idea these carburetors were tunable for this much power. Learn sumffin new everyday.

Will you buy me one too? - - - Updated - - - My understanding has always been 600 HP and up you should start considering a different block. I know a lot of folks have blasted dyno runs with much more through a stock block, but you're talking about much more than a dyno run or two. Also...

Pies are round, not square.

Well let me pose this question. Is there room to drill the jets larger?

It's almost beginnin to sound like the Carter/Eddy style carbs just ain't made for that kinda fuel.

That's when you get the wiz wheel out and cut the "vent" line off just under the plate and then call it a return.