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My Vortech SC Surges @ 8k RPM...Whats Wrong??????

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Old 04-20-2004, 01:07 PM
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Did you not gap your plugs DOWN? It specifically states this in the Vortech manual. Running stock gap can lead to funny issues.
The oil you see in front of the impeller is most likely from the front valve cover breather. Remember, you connected it to the elbow on the intake just before the blower.
Old 04-23-2004, 03:10 PM
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[QUOTE]Originally posted by xviper
Did you not gap your plugs DOWN?
Old 04-23-2004, 03:12 PM
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[QUOTE]Originally posted by xviper
Did you not gap your plugs DOWN?
Old 04-23-2004, 03:15 PM
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[QUOTE]Originally posted by Sideways
You may be running out of fuel.
Old 04-23-2004, 03:20 PM
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[QUOTE]Originally posted by RedRice
Old 04-23-2004, 03:25 PM
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Damn Viper, Quick Reply,

Thanks for the help, I have NGK's gapped at 0.035 I did not read the part in the manual about the gap.
What plugs are you running?
I need to replace mine and I would like to try something different.
Old 04-23-2004, 07:44 PM
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Originally posted by RedRice
What plugs are you running?
I ran the OEM plugs gapped "down" to 0.034" for over a year without problem. I've only recently gone to the NGK V-Power racing plugs (one step colder), also gapped down. For the last month or so, they have been working just fine. I've just received my Denso Iridium IK-24's in the mail and I'll throw those in once I've used up my 2 sets of NGKs.
Old 04-25-2004, 05:57 AM
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Im having a hard time looking up plugs with NGK's web site.
Do you know what the part # is on the race plugs?

Thanks
Matt
Old 04-25-2004, 06:26 AM
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Can you describe the surging at 8K? Are you able to power down after 8K? Could it be a slipping clutch?
Old 04-25-2004, 06:34 AM
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Originally posted by RedRice
Im having a hard time looking up plugs with NGK's web site.
Do you know what the part # is on the race plugs?

Thanks
Matt

NGK stock # 7173 is a R5672A-8, 1 range colder than stock, non-resistor plug
NGK srock # 7405 is a R5672A-9, 2 ranges colder than stock, also a non-resistor plug

Most SC'd owners are using the 8's. I briefly swapped to the 9's in a attempt to eliminate some detonation I was having in winter with oxygenated fuel.


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