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Header Temp

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Old 02-27-2006, 08:30 AM
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Header Temp
Does anyone see anything wrong with these temps?

8- 353F
6- 320F
4- 486F
2- 330F

7- 375F
5- 511F
3- 465F
1- 745F


All temps were taken with infared temp gun
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Old 02-27-2006, 08:49 AM
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Re: Header Temp
Were these temps sampled at an idle? If so, they will have less meaning as opossed to the engine being up on RPM or better yet under a load.
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Old 02-27-2006, 09:31 AM
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Re: Header Temp
so i should rev it up to 2500rpm?
i will never get a reading driving around
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Old 02-27-2006, 09:52 AM
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Re: Header Temp
Sure you can. Just remove your hood and driver's side t-top, throw a brick on the gas pedal, and lean over the windshield with your temp guage.
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Old 02-27-2006, 10:12 AM
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Re: Header Temp
HAHAHAHAHAHA....awesome, i would think you could just hold it at 2500 or something like you said and then see what the readings are.
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Old 02-27-2006, 11:39 AM
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Re: Header Temp
Best way is to do it like you are reading plugs.

Run it hard, and then kill it immediatly and take the readings. You also want to make sure you take the readings at the same spot on all primaries.
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Old 03-02-2006, 09:22 AM
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Re: Header Temp
OK i tried it at holding 4000 rpms on the dyno

2,4,6,8 were around 500 degrees

1 was 130
3, 5 were 230ish
7 was 280ish

what the ****
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Old 03-02-2006, 10:29 AM
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Re: Header Temp
Looks to me like the odd bank is all cold, which means its rich. You have an exhaust leak on the driver side??
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Old 03-02-2006, 10:54 AM
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Re: Header Temp
negative sealing is great
also the compression across th board holds at 202psi
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Old 03-02-2006, 11:18 AM
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Re: Header Temp
Have you tried switching the o2's from side to side and see if the temperature switches too?
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Old 03-02-2006, 11:54 AM
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Re: Header Temp
for some reason last night the o2's where never switching to stay on last night
they would switch on but not stay on
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Old 03-02-2006, 12:02 PM
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Re: Header Temp
Originally Posted by J Rod
Sure you can. Just remove your hood and driver's side t-top, throw a brick on the gas pedal, and lean over the windshield with your temp guage.
it's called cruise control.

Reading your sig you have changed the engine much from stock. What are the cyl balance tables sitting at? Datalogging? what about the blms?
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Old 03-02-2006, 12:32 PM
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Re: Header Temp
not sure what any of those things are but the computer guy said everything was reading fair
AF ratio was steady 12.4 and decreasing at WOT
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Old 03-02-2006, 12:34 PM
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Re: Header Temp
Originally Posted by Hotwire
it's called cruise control.
Yea but CC won't keep you at WOT, a brick will..... well for a little while anyway.
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Old 03-02-2006, 12:37 PM
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Re: Header Temp
OK we did these easily as you can load the dyno to a certain MPH so u just get it up to 55 and then leave it in gear an the car will keep revving
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