Carb recommendation needed...

dustaar said

I have a 408 with the following:

10:1 compression
.545 lift cam..241 and 247 duration
Eddy heads
Eddy rpm air gap intake
MSD ign
TTI headers and 3 inch exhaust

I have had 3 825 BG Mighty Demon carbs on this engine and it still runs
pig rich at idle. I have done everything BG tech people have told me to
do including smaller IFR jets.

I am getting ready to pull the carb and toss it. Can anyone please
recommend a good carb for this engine? Size and brand .

Thanks in advance,
Dustaar

Click to expand...

I have a Mighty Demon 750 on my 410 that ran lean on the Dyno. I have tuned it up to run just on the rich side because I run WOT all over the place. On the Dyno Brian at IMM engines put on a Holly 1000hp carb and it was spot on out of the box and made more power. Didnt have time to screw around with the Demon on the Dyno since the day went by so fast. My cam is a bit bigger than yours 256/262@50 and 618/624 lift solid flat tappet. 10.20:1 Compression with Ported RHS/INDY X HEADS.

If I were to buy another carb today the HOLLY 1000hp would be it.fwiw