dual quads setup
May 30th, 2016, 02:02 PM
#8
Registered User
Join Date: Oct 2013
Location: Hebron, indiana
Posts: 418
When i start mine cold I keep the rpm up around 1500 until I reach 150-160 degrees, I have to do that running 92-93 octane. 100 octane no so much. I have 500's on mine for normal street use, with my cam they are useless below 3,000 rpm but good for cruising with a 4 speed. I've had to jet my primaries down a step, that fixed occasional plug fowling.. Mine runs great, plugs look recently new usually change them every 2 years.. Keep checking all your plugs to tune each bank properly, hope this helps.
Sean
Sean
May 30th, 2016, 03:37 PM
#10
I'll get some pictures soon.. I am running 400E using 30 over forged flat top 350 pistons, comp cam 2-224-4 520/523 lift G heads cut 30 and ported 4 speed 3.73 12 bolt posi.... so far there is no problem running the 600's, not my choice, but the hand dealt me, I rebuilt them the forward carb is as closed on idle as it can be, rear is the primary carb, dialed them in with two vacuum gauges, so far they run far better than the carbs I have tried with the intakes I tried... forgot, I'm running gear to gear timing too
Last edited by olds330; May 31st, 2016 at 06:12 AM.
May 31st, 2016, 12:13 PM
#11
Out of Line, Everytime😉
Join Date: Dec 2006
Location: Melville, Saskatchewan
Posts: 8,911
I am planning on running dual 625 cfm Street Demon carbs with the taller Offy dual quad on a 424 ci 403 based stroker, will be around 9.5 to 1 compression. Good part about the AVS and Street Demon carbs is the adjustable secondary air door, bound to help with over carbing the motor. Any track times with this combo?
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