04-20-2003, 05:51 PM
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CC Member
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Join Date: Mar 2001
Cobra Make, Engine: ERA 427SC w/428 & Richmond 5-speed Car 611.
Posts: 525
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Not Ranked
Two technical issues:
1) How do I knoe if I damaged the "pop-off" valve on a Holley 4150 hp? While starting the car for the first time since the re-build, the timing was off and it back-fire through the carb. What kind of damage could have been done?
2) While trying to set the timing to 36 degrees at 3,000rpms, the timing would jump from the top of the index pointer to the bottom of the pointer. I estimate that jump to be 7 to 9 degrees in variation. What causes that condition? Would the multiple spark feature of the MSD 6AL cause that? According to the MSD info, there are 3 sparks per cycle for each cylinder while under 3,000 rpms. Would that cause a mis-reading?
I wish I were more engine worthy.
Someday I might be...
Thank you for any help.
Todd Hedges
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...."they say I'm crazy, but it takes all of my time."
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