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Post by David7355 on Mar 10, 2009 8:00:34 GMT -5
Main reason was #4 had the LEAST amount of other other stuff close to it. Also the tube came out farther from the head than most of the others before it started to bend. More straight pipe to mount the clamp to. Not that it really mattered I guess.
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Post by Eric Bowling on Mar 10, 2009 15:29:04 GMT -5
MIne is in #8
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Post by adamsvega on Mar 11, 2009 6:24:23 GMT -5
I HAD ONE THAT WENT THE OTHER WAY!!! if you tuned it past 980/1000 it slowed down and did not slow down adding fuel till it hit 850 . and it was two different meters and probes . location and combo I GUESS . .
if the plugs look good and the timing line is on work with it.
it is possible with timing not optimum and too rich to burn in the pipe past the ex. valve and drive the egt nuts . tune by mph and plugs. egt is a reference for you from ideal . your not going to burn parts at 1300 @ 1500-1600 i worry.
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Post by hobbesnmina2001 on Mar 11, 2009 23:12:04 GMT -5
David,
Since you are using what should be a rich cylinder reading, you should figure out how far off your other cylinders are as well as if your particular temp unit is off by a lot. Assuming you do not want any more holes in your headers:
!) You could try an infrared gun on each tube (mainly @ idle).
2) You could put the end of the temp probe wrapped in insulation on each tube.
3) You can also run two wires without the probe touching the metal for each tube as well (works better on bare metal).
Try to read the same spot and try to make all the points consistent from tube to tube.
These readings will not tell you exactly how hot the exaust gas is but in trying all or a couple it an give you an idea of how far off each cylinder is from the others and you can stablish basic differences between rich vs lean cylinders.
Instruments even of the same model can have a reading offset, the important part for you is to know which way they are off and by how much.
Now assuming your temp reading on #4 is hotter then 6, 2, 3, 5 then you can diagnose why. It maybe a distribution problem, vacuumn leak, etc.
Hope this helps.
Carlos
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