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Old 10-20-2005, 02:39 PM
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Default Red hot headers

i have a 351 .030" over
ported E7 heads
484/512 cam
1.72 rockers
Edelbrock Performer RPM Air-Gap Manifold
Holley 600 vacum secondary carb
Full Msd ignition
apprx 14deg base timing
mid legnth headers

i started it up today and after about a minute the #8 primary started to turn red hot. It has never done this before, no detonation, no unusual sounds, although i think it might have been idleing high (it was about 1800 RPM, i have not gotten around to setting a proper idle yet but it does not like to run under about 100-1100 RPM). What could cause a condition like this?
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Old 10-20-2005, 03:01 PM
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now i am thinking that it is the carb, I think the shaft for the secondary butterflies is leaking and allowing air in and causing a excessivly lean mixture on #8 i also noticed yellow stains on the manifold right below there. if this carb is fuxored i will either have to pay to have it rebuilt by next weekend ($80 bucks) or swap my brothere 650 DP onto it.
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Old 10-20-2005, 05:08 PM
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its lean. careful, the headgasket or piston is gonna die.
Old 10-20-2005, 05:23 PM
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does sound lean. maybe an intake gasket leak on that cylinder?
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Old 10-20-2005, 06:00 PM
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im going to try switching out the carb first because there is some fuel leaking out from the secondary throttle shaft, if it is still doing it i hope i can swap intake gaskets and still be able to finish everything before next weekend
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Old 10-20-2005, 06:36 PM
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did not pull the plug yet but the primary was red enough to get my attention, after which i immediatly shut it down
**EDIT* here is the plug, the electrode looks like it has been heated, there is slight blueing on it, the center electrode looks like there might be a small white tip on it. sorry for the bad quality i dont know how to take a good up close picture
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Last edited by Duceanahalf; 10-20-2005 at 06:45 PM.
Old 10-20-2005, 07:18 PM
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i have pedestal mount rockers
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