Demon Carburetor issue

69dodgedart360 said
Hey everyone, I have a 10:1 compression 360 with an airgap manifold, tti headers, ported x heads, comp xe284 cam and a speed demon 750cfm carb that's having some sputtering issues between 1500-2000rpm when in drive at about 25mph. If its left in drive and I floor it at that rpm range it sputters, doesn't accelerate and almost freezes and then after a few seconds takes off. If it is left in 1st it handles it a little better but still has a hesitation. I am thinking this is too much fuel and am thinking I need to jet it down. Any recommendations on what jetting would be a good starting point? I think it has 72 and 76's and a 4.5 power valve but will double check.

Thanks

I would like to know a couple things.

what elevation are you at?

how much manifold vacuum do you have?

what is the initial timing?

what is the total timing?

what rpm does it full advance to total?

it wont run good with the ootb jetting and your cid combo.
secondaries are fine, but the primary should be changed to 73's or 74's, after that its on to the shooter size which will probably be around 31 with an orange cam...but one thing at a time.