Quote:
Originally Posted by koates
Vacuum leak somewhere. Get yourself a vacuum gauge and connect into the intake manifold and read the chart that comes with the gauge. Regards, Kevin.
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Quote:
Originally Posted by Terry,OH
I also suggest the vacuum gauge. Have you tried to remove the idle mixture screws and check the small passage is clear. Each screw should effect idle if one does not that is the one to check.
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Thanks guys.
I have thought the same. I did find one vacuum leak on my Sharp intake that I was using, pulled it off and put on my Offenhauser 2x2. The bad part about the vacuum port on these dual planes is its only getting signal from 4 cylinders of the motor. I have found this test to be a bit off at idle as well since the isky 1007b cam has a nice overlap. 12-15 at idle, Off idle I get 15 to 18, 1200 rpm I am over 20. Verified by my motorminder gauge inside.
Terry, I had both bases apart, full clean, rodded passages out, upper transition slot and lower with .030 welding wire, no obstructions. Every screw will do exactly what it should. Both carbs were synched with an airflow synch tool. The front base has a little more side to side play in the idle screws than the rear, but they sill seat just fine. Emulsion tubes have been replaced, carb tops were re surfaced, these Largo Logo Stromberg 97s have had the full gammet done to em.
I have the o-rings on all the intake valve guides when I built it, and 175 psi average compression across the board.
5 min of idling the coil will be warmed up while the block is still cold. I did a amp test running, I am averaging 3.2 amps running with current setup after 5 min. Voltage to the coil after ballast resistor is 7 volts running.
I am thinking these Standard T series coils may be the issue, I have heard alot of things lately on their quality being junk these days. I went ahead and ordered a Bosch 00012 to see how that goes. Fingers crossed!
