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Running rich - in Denver


thezster's Avatar
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Join Date: Aug 2005
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08-21-05, 05:44 PM   #1  
Running rich - in Denver

Just moved to the Denver area.... (Mile High City). Noticed my Supra is not accelerating as well as I'm used to - especially when under load (pulling 1-3 slalom skiers up) - and my top speed is about 5 mph less than what I'm used to.

Then today it hit me when I skied - and smelled gas behind the boat .... I'm at altitude. My 850 Holly (in a 351 Ford inboard) is running richer than normal - probably the cause of my problems.... Any suggestions for "rejetting" the carb"?

Anyone have any experience with a similar situation

 
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KCHOTBOAT's Avatar
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08-22-05, 09:24 AM   #2  
KCHOTBOAT
You should pull a plug or to and see how they look. Not sure which cylinders run lean on a 351 but I tend to check 5 & 7 on my BB chevy. Holley carbs are easy to rejett. Here is a link on how to read plugs.
http://dragstuff.com/techarticles/ho...ead-plugs.html

 
thezster's Avatar
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Join Date: Aug 2005
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08-22-05, 10:29 AM   #3  
Posted By: KCHOTBOAT You should pull a plug or to and see how they look. Not sure which cylinders run lean on a 351 but I tend to check 5 & 7 on my BB chevy. Holley carbs are easy to rejett. Here is a link on how to read plugs.
http://dragstuff.com/techarticles/ho...ead-plugs.html

Thanks... she's, without a doubt, running rich....... and I'll rejet the carb.... I've been advised to advance the timing 1 degree per thousand ft. in elevation....... thoughts?

 
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