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Old 08-10-2008, 11:49 PM   #1
chanders
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Member#: 131319
Join Date: Nov 2006
Chapter/Region: International
Vehicle:
2003 JDM STI
World Rally Blue

Default EGT on 20 thou overbore

Hey guys, I just rebuilt my 2.0 V7 JDM STI with a 20 thou overbore and was wondering what the EGT should be.

I am currently breaking in the motor so I am not running any boost.

I have noticed while driving (in no boost) at about 60mph constantly the EGT approaches 1400F. Is this normal for an engine with the slightly greater compression ?

Any input would be great, thanks!
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Old 08-11-2008, 10:46 AM   #2
mick_the_ginge
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2003 Sleeved 2.5
Oil Dry Sump Goodness

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Depending on where the EGT sensor is that sounds about right to me, I used to see 1525 on cruise. What you need to do is check the fueling and timing under those conditions. Under cruise you should be at 14.7:1 AFR and loads of timing.
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Old 08-11-2008, 02:29 PM   #3
chanders
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^^ Thanks Mick. The sensor is actually located in the exhaust manifold about 4" from the flange. I am yet ti install my wideband to determine the AFR's in that area.

Thanks for your input. Anyone else with some info?
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Old 08-11-2008, 08:40 PM   #4
remowgn
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Quote:
Originally Posted by chanders View Post
^^ Thanks Mick. The sensor is actually located in the exhaust manifold about 4" from the flange. I am yet ti install my wideband to determine the AFR's in that area.

Thanks for your input. Anyone else with some info?
I see numbers in line with what you're getting with my stock EJ205. It's completely normal to have high EGT's at cruising... with the ECU keeping things at stoich and a comparatively low amount of air going through the motor, they will be right up there. It's nothing to worry about and is actually a good thing, as it means you're getting a more complete burn and the cats (well, if you have any) will do their job better.
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Old 08-11-2008, 10:55 PM   #5
chanders
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^^ Thanks. I was beginning to get a little worried when I saw 1400F!!
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