I am looking into getting a new BG carb for my 351c.
Can you guys give a little advise on what you would buy please;
My motor has been dyno'd with a 650DP holley and made 309HP and the AFR was fine, so I thinking a 650DP is big enough.
-blue XB block, 2 bolt.
-351 crank and rods, prep'd
-2v CC ported and flowed to 450hp+, 4v exhaust. 3 angle intake, 4 angle exhaust.
-crow hyd 211367, 226 232 .530" .548" @.050
-crow double springs, all crow new valve train K2104
-rotating assem balanced
-4-1 1 7/8 pacemakers with 2.75 dual into single 3" at back of gearbox.
-22cc dish in pistons, heads shaved 20thou+. clearance fine but still only 9.6:1 approx.
- MSD ign sys, dissy, coil and 6AL.
-yella terra bolt on rollers
-LV oil pump and stnd sump, got new sump ready to go on next lift. stnd fine atm though. stnd oil sys.
-4 spd borg and borg 2.93 open.
OK so from looking at the BG website this is what I can gather;
Its out of,
-Part # 1282010
650 Speed Demon stated as Mild 302 to 427 cid engines
-Part # 5282010GC
650 Mighty Demon stated as Moderate 289 - 327 & mild 350 - 406 cid engines
Part # 5402010GC
750 Mighty Demon stated as Well-prepared 350 - 406 & mild 427 - 468 cid engines
The difference between seems to be the style of cam, Speed demon can handle cam duration to 240.
Things in the future will be, c4 auto with about 3000stall, 9" and maybe a mech cam of not much bigger as I want it under 6,200rpm.
ps. morning are cold here sometimes so a choke is most likely needed though I have never had a BG and I hear they idle prtty good without a choke even when cold? mighty= no choke.