EGT Probe

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04-24-2007, 09:08 PM

#21

grippgoat

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Quote:

Originally Posted by jayc72

The problem with #4 running how has to do with the coolant routing and not the EGT.

And that it's the last one on the rail and tends to slightly less fuel.

-Mike

04-24-2007, 09:10 PM

#22

cjernigan

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Quote:

Originally Posted by grippgoat

And that it's the last one on the rail and tends to slightly less fuel.

-Mike

Thus the reason many people do the DIY dual-feed rail mod.

04-24-2007, 09:58 PM

#23

Lex

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High EGTs can also be due to too little fuel ... so yes, use as many tools as possible.

Try putting the IAT in the manifold for best results .... if not as close as possible to the manifold.

04-24-2007, 11:24 PM

#24

cjernigan

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Think I might do that. Thinking about taking the upperintake off and putting the IAT in the back wall of the manifold. See anything wrong with that? I like the idea of the ugly GM IAT being hidden back there.
Then again, i also like the idea of drilling and tapping my IC piping instead of my mani. We'll see.

04-25-2007, 02:20 AM

#25

Reverant

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I have 4 EGT probes in my N/A engine with 270cc injectors. #1 runs the hottest, with #2-#3-#4 being the runner ups (in that particular order).

Check this thread for more info: http://forum.miata.net/vb/showthread.php?t=217268

04-25-2007, 12:46 PM

#26

richyvrlimited

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Quote:

Originally Posted by Reverant

Only applicable to the NB tho, as the NB's fuel rail is fed from the opposite side to the NA's (iirc) hence #4 being the hottest/leanest on NA's

04-25-2007, 03:20 PM

#27

grippgoat

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Quote:

Originally Posted by cjernigan

The intake manifold gets quite heat-soaked, and could badly bias the IAT's toward the hot end. I think intercooler pipe close to the throttle body is the way to go.

-Mike

04-25-2007, 03:25 PM

#28

cjernigan

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Quote:

Originally Posted by grippgoat

The intake manifold gets quite heat-soaked, and could badly bias the IAT's toward the hot end. I think intercooler pipe close to the throttle body is the way to go.

-Mike

I really like getting advice like that. Hooray for not taking the IM off.

04-25-2007, 03:35 PM

#29

grippgoat

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Quote:

Originally Posted by cjernigan

I really like getting advice like that. Hooray for not taking the IM off.

I just hope it's good advice.

It's the way I'm planning to do it, and it was recommended to me by some people that get paid to know that sort of thing. And my intake manifold gets HOT to the touch.

-Mike