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Re: Accelerator pump shot
[Re: RapidRobert]
#1302264
09/27/12 02:32 AM
09/27/12 02:32 AM
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Joined: Jan 2007
Posts: 401 Norway
General 68
OP
mopar
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OP
mopar
Joined: Jan 2007
Posts: 401
Norway
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Yes, by the specs measured at the fbo coil, I agree. Too much resistance through the supplied ballast maybe. I still have plenty of juice to ignite the fuel as the engine screams other than the mentioned wot bog. I also agree this seems to be some kind of fuel starvation somewhere inside the carb. It should not be flooding as it seems to clear up some after idling a minute. Or could it actually be lifter pump up that makes a valve or two not seating 100% as the bog disappears during shutdown? I do not know how this should feel. Also have in mind that idling (with less oil pressure) clears it up some. I can not get more than 11" of vacuum at 850 rpm idle. Vacuum is is not pulsating and power brakes work great. This is with a Lunati 60303 cam, .226/.234 @ 50, adv. dur. 268. I will have to double check that with a different vacuum gauge thou. And mayb monitoring the vacuum when running to see if it pulsates at first when going back to idle.
Last edited by General 68; 09/27/12 03:12 AM.
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Re: Accelerator pump shot
[Re: General 68]
#1302269
10/02/12 11:54 AM
10/02/12 11:54 AM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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Yes it's always a good idea to keep it all in the same thread. I'd set the initial with the "vacuum gauge" method then with that figure in hand shorten the slots to get 36 total then go with a lighter spring combo that keeps you just under the pinging point at WOT up thru the gears on your hottest/driest (most likely to ping) day and which starts advancing a bit above your in gear idle RPM. Vac adv (if used) is capped to set initial and total if working with ported vac adv. If going with full manifold vacuum then it'd be plugged in to set the idle timing but not the total. If ported then after the initial/total/springs are set plug in vac adv (if used) and work with it in everyday part throttle operation around town staying just under the pinging point. A 3/32" allen wrench CCW slows the onset of its' curve
live every 24 hour block of time like it's your last day on earth
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Re: Accelerator pump shot
[Re: General 68]
#1302271
10/05/12 10:44 PM
10/05/12 10:44 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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Is this a newer type Mallory built MP dist that I think uses special (I've never owned one) springs? If it's a regular type (70's) dist MP has a light spring set as does Mr Gasket & on those (70's dists') keeping the stock light spring and tossing the heavy spring with the long loop on one end & subbing in (1) mr gasket or MP spring would be a good start. Want to stay just under the pinging point at WOT up thru the gears on your hottest/driest day and want the curve to start a bit above your in gear idle speed
live every 24 hour block of time like it's your last day on earth
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