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> Head Temperature top five, *** Give me the top five reasons head temps run high *****
wndsnd
post Nov 28 2013, 04:41 PM
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Oil temp is cool, heads are running hot.

What are the top five .....
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brant
post Nov 28 2013, 04:45 PM
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Timing
AF ratio
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wndsnd
post Nov 28 2013, 04:58 PM
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QUOTE(brant @ Nov 28 2013, 05:45 PM) *

Timing
AF ratio



1. Too advanced, or too retarded? I would guess retarded.
2. Too lean? Idle fuel adjusts are two turns out. That should be plenty unless jetting is wrong.
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brant
post Nov 28 2013, 05:05 PM
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Advanced.
And idle screws adjust idle.
Jets take over under load which is where heat is created.

Also check for blockage in your cooling fan
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dfelz
post Nov 28 2013, 05:31 PM
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QUOTE(brant @ Nov 28 2013, 03:05 PM) *

Advanced.
And idle screws adjust idle.
Jets take over under load which is where heat is created.

Also check for blockage in your cooling fan


I have been told too retarded will send more heat to the heads. I would imagine both sides of the spectrum would result in hotter heads.
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McMark
post Nov 28 2013, 05:33 PM
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How hot?
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Mark Henry
post Nov 28 2013, 05:34 PM
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mice
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ConeDodger
post Nov 28 2013, 05:41 PM
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Even in a perfect tune, head temps go up when you are driving uphill or under a sustained load.
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wndsnd
post Nov 28 2013, 06:21 PM
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QUOTE(McMark @ Nov 28 2013, 06:33 PM) *

How hot?



You don't want to know. According to Raby the engine should have self destructed by now.
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wndsnd
post Nov 28 2013, 06:22 PM
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QUOTE(Mark Henry @ Nov 28 2013, 06:34 PM) *

mice



Got all the mice.
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wndsnd
post Nov 28 2013, 06:29 PM
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Just rejetted the mains, and got the temps down substantially. I am working close to Erics calculations now.

But now It bogs down, so I think I may have overdone it.

Also I adjusted the Idle mixture screws a bit richer. (Not the idle speed screws).

I also have a AF guage, but not sure what I am reading, or where it should be. It fluctuates all over from 9.5 to 18.

Getting head temps of 350 - 375. Was over 450 (IMG:style_emoticons/default/icon8.gif)

This is the dANNY engine, so if it blows, it blows. I just need to get it to Tangerine tomorrow and at2 1/2 hours of freeway speeds, I needed to get the temps down, or I would be calling AAA.

I might have to call them anyway.
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wndsnd
post Nov 28 2013, 06:30 PM
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QUOTE(ConeDodger @ Nov 28 2013, 06:41 PM) *

Even in a perfect tune, head temps go up when you are driving uphill or under a sustained load.



Not this high!
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McMark
post Nov 28 2013, 06:38 PM
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You really shouldn't see anything over 16. 18 is too lean.
You really shouldn't see anything under 12. 9.5 is too rich.

I bet your carbs are out of sync as well.
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76-914
post Nov 28 2013, 06:42 PM
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Did you verify the temp reading.
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wndsnd
post Nov 28 2013, 06:43 PM
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QUOTE(McMark @ Nov 28 2013, 07:38 PM) *

You really shouldn't see anything over 16. 18 is too lean.
You really shouldn't see anything under 12. 9.5 is too rich.

I bet your carbs are out of sync as well.



You can bet on it.

Mark, you are getting my next basket case. I just bought Randy's engine.
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wndsnd
post Nov 28 2013, 06:45 PM
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QUOTE(76-914 @ Nov 28 2013, 07:42 PM) *

Did you verify the temp reading.



No,

Wish I had an infrared, but the temps are down now. Probably too rich, it is really bogging.
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PanelBilly
post Nov 28 2013, 07:26 PM
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Harbor Freight has the infrared guns on sale tomorrow
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wndsnd
post Nov 28 2013, 07:33 PM
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Probably wouldn't help because head temps change so quickly. And when they are loaded you are moving
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Kirmizi
post Nov 28 2013, 07:45 PM
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Is the thermostat installed and what is the position of your cooling flaps?
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914itis
post Nov 28 2013, 07:58 PM
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QUOTE(McMark @ Nov 28 2013, 07:38 PM) *

You really shouldn't see anything over 16. 18 is too lean.
You really shouldn't see anything under 12. 9.5 is too rich.

I bet your carbs are out of sync as well.

Slight hijack.

Can someone recommend and air fuel gauges for out cars ?
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