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post #1 of (permalink) Old 08-20-2000, 05:08 PM
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I found my heating up problem

I finally figured out why my 401 was getting hot on the highway. A couple of months ago I changed my center pivot float bowl over to side pivot. During that same time I decided to lower the float level just a little bit mor for better off camber fuel control. It looks like at highway speed ( 3300 RPM ) The fuel level lowered just enough to create a lean condition, and my engine would heat up. I raised the float level 1 hex flat, and now I barely run 180 degrees. I always try to make thing more complicated than they are, should try the simple things first.

Thanks, Ray

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post #2 of (permalink) Old 08-20-2000, 05:19 PM
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Re: I found my heating up problem

did you also have a problem anytime you were running higher rpm's. like when off road and in low range?

brian wilson
80 cj5 "high 5"
stretched to 100" wb
post #3 of (permalink) Old 08-20-2000, 09:23 PM
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Re: I found my heating up problem

It only heated up during sustained high RPM driving. It didnt really get hot hot, only about 205 degrees, but it just happened all of a sudden, and it kinda had me worried. It started after I put on different float bowl, and I really didn't put 2 and 2 together. I have a Carter high volume mechancal fuel pump, so it didn't starve, it just leaned out enough to heat up.

Thanks, Ray

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post #4 of (permalink) Old 08-20-2000, 10:28 PM
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Re: I found my heating up problem

[img]/wwwthreads_images/icons/smile.gif[/img] In engineering skool they taught us that a lean condition meant that the fuel took longer to burn because the particles were too far apart to get quick combustion, and consequently the mixture was burning well into the exhaust stroke when the cylinder should have been cooling. So it normally occurred under a power condition......as in a sustained pull.[img]/wwwthreads_images/icons/tongue.gif[/img]

Quadra-Tracs modified While-U-Wait by the crack moonguy[img]/wwwthreads_images/icons/wink.gif[/img] Quadra-Trac Team.[img]/wwwthreads_images/icons/tongue.gif[/img][img]/wwwthreads_images/icons/smile.gif[/img]
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