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Race Track Problems - duplicated on the street last night!!!!
#1
two days after the bad track day last week, i removed a few parts off the motor to make sure nothing has went wrong with the motor. all i found was a cap, rotor needed to be replaced and my vacuum advance was bad and needed to be replaced. the lifetime warranty on the dizzy was exchanged at kragen.

now i have 46-48 total advance when the car is reved to 2500-3000rpms. i also changed the 82 primary jets back to 86's. the motor pulls harder and it picks up better between shifts, however i can shoot a white cloud of smoke upon start up and it'll spit fuel out the tail pipes until it warms up (don't know if it still does after i drive it and were to park it idling). i had those yets in there for a long time but it always seems to stink up the garage if i were just to start the car. i'm thinking of putting in 84 and hopefully it has the same pick up and go but doesn't shoot a cloud of smoke out th tails upon start up.

now here's the issue - at the track when i'm rolling down the track there were TIMEs that i'll try to shift at 5000-6000rpms and my motor just wouldn't want to rev anymore. on the streets i have no problems making her rev to 5000-6000rpms while its just partial throttle. now here is where i can duplicate the track problem, going down long stretch of road away from base the speedd limit is 60mph, i rev'ed to 5800rpms with partial throttle, and then shifted into 2nd and smashed the gas to the floor and let the rpms climb. when i hit about 5200ish rpms thats where the problem is going on again. if i let off the gas a big and the it'll reach 5800-6000rpms as long as i'm not into the seconaries.

if it somewhat an ignition problem, i'm going to call Scotty J on monday morning to arrange a drop off of my new kragen duraspark dizzy. but i'm thinking its mainly a secondary jet issue.

just to clarify, jet extension are only for the rears correct? i also ditched the MSD and went back to a full FORD DURASPARK II ignition and it seems to be working better for some reason. and obviously my tach is working without any problems and no more fluttering of the gauge at any time.

so at least i fixed the tach issue with zero $$$ involved other than having to buy some extra wire loom for $5 just for personal preference.
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#2
Olie I am running a Holly 850DP on my 351. I have a jet setting of : front 76 and rear 86. The squirter size is 31. I am running an MSD system with my timing set at 38 degrees. The car runs strong through the 1/4. My best time so far has been 13.27 at 105 with a sick engine.
Jim

drive it like you stole it
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#3
xoliex;25653 Wrote:just to clarify, jet extension are only for the rears correct?

Correct.

Pete - MotoArts Decals and Signs
'71 Sportsroof 351C-4V/4-speed - FINALLY under construction - no, wait, on hold again...
'90 Mustang 7-Up 5.0 ragtop, rolling beater
'66 Sunbeam Tiger Mk.IA, survivor
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#4
Olie, I'm no 460 expert but 46-48 degrees of total timing really seems like allot maybe 10 degrees too much. My old pontiac really liked timing but 44 was the limit with good gas. If you have too much timing the engine will act doggy too. Just a thought.

Jeff T.

Low buck, touring style, '73 Convertible "rolling restoration", 351c, 2v heads with a shave and a haircut, Performer intake, Holley 650(ish), roller rockers, screw in studs, guideplates, stainless valves, Duraspark / Motorsports MSD, T-5 conversion. 1-1/8" front, 3/4" rear swaybars KYB shocks and some home brewed subframe connectors. Future plans; JGC steering box, Cobra brakes and... paint, interior, etc.

When I die I want to die like grandpa, peacefully in my sleep... not screaming, like his passenger.

[Image: 1_12_09_14_10_15_11.png]
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#5
X2 WITH DROPTOP, THAT SOUNDS LIKE ALOT. I WOULD THINK 38 WOULD BE ABOUT THE MOST, BUT IM NO EXPERT, ON BIG BLOCK FORDS. I AM STILL GOING TO SCHOOL ON THEM MYSELF. BUT I THINK I SAW IT ON 460 FOROUM THAT 38 WAS ABOUT IT.
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#6
to clarify everything, with the vacuum advance disconnected, i have 32-34 degrees of total timing with about 3000rpms. and i immediately connect the vacuum advance and then thats when i'll see the 46-48.

the 460 gods are saying that i should have 34-35 total timing without the vacuum advance hooked up. so i'm assuming i'm ok, but if it really is too much, should i not connect the vacuum advance?

olie
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#7
where is the vaccumm advance connected? I believe it should not be connected to full manifold vaccum but a special port on the carb that only increases vaccum at cruise or part throttle

[Image: mustangnight010.jpg]
1972 Mustang Convertible 351C 4V
1966 Ford Galaxie 7 litre-4speed

Jorge
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#8
jorgem2;25847 Wrote:where is the vaccumm advance connected? I believe it should not be connected to full manifold vaccum but a special port on the carb that only increases vaccum at cruise or part throttle

I have it connected to ported vacuum! I tried the manifold vacuum n it just increases the timing to 26 immediately. Rev her n she is at 46-48 again. One of the builder on the 460 site said that's normal. The dizzy has been curved before.
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