Gold Lifetime Member
Join Date: Jan 2005
Location: 2 Dog Town in West Texas
Re: Tuning Question-383 with 4150/HP center
Omalley, your set up is much like mine, cam and all with AFR 195 heads but I run 10.3 compression. I have a 3310 vac secondary tuned with a LM1. Ended up with 70 primary and 80 secondary with a 55 PV in front. Std cams. Like you I cruise 13 or so but nailed I go to 10:1 . I run 17° initial with total of 36° , no vac advance, all manual curved.
I don't run large squirters, #31 in front but vac secondaries work well . My idle with the PV is at about 12" . I do not run a rear PV.
I do have an 850 HP downleg vac secondary carb that tuned with the LM1 and runs better but does not have the crisp throttle as the 3310. I do get over 20 mpg on tours with 3.73 gear and TK0600.
I think you need to get that 9.5 pv out of there first, depending on what your idle circuits are doing, I would go to a 45 or 55 to check things out. Your fuel demands need to come on quicker for sure. Your fuel pressure and volume sound good but what is it doing WOT?
I have run many hi psi pumps, elec pumps and still come back to a fuel log fed by a plain holley #327 style pump.
You need to do something quick or you will have a paper weight. hope this helps..
PS: your cam is identical to mine from UD Harold.
Forgot to mention, My elevation is 3350' so take that into consideration when comparing.
TC # 349
Zdld17:69 Z/RS,306, NOR141111, 9N554XXX, 12A, X3G, 59/59,723, AFR 195,CCC282/290HR, TKO 600, BU1122B1E Owner since Dec 1968
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Last edited by zdld17; Jul 10th, 14 at 03:18 PM.
Reason: elevation factor