EGT sensor ... were would you hook it up ?? - Subaru Impreza GC8 & RS Forum & Community: RS25.com

Kyokudo Racing · 07-01-2009, 11:52 PM

For the pros. Were would you connect an EGT sensor due to the long length of the manifold runners. Usually I used to fit it directly in the Turbo exhaust housing but I think its too far away to get proper readings from the sensor. I was thinking because I have a 4-2-1 equal length manifold at the moment before the turbo on my GC8. I was thinking of sticking the sensor between runners 3 and 4 seeing that piston 3 is the most restricted aparently. What do you guys think ?

Regards,

Daniel J Vella
www.KyokudoRacing.com

Storm · 07-02-2009, 03:52 AM

Isn't it generally accepted to place the probe 4-6" from the head flange on a turbo motor? I haven't read up on it lately......that may be for NA motors and 6-8" back for a turbo motor.

**kay95** · 07-09-2009, 02:31 PM

There the two trains of thought. One that says it should be close to the valves. I found info from 3-8" from the exhaust valve. The other is at the collector is hottest because you measure all the exhaust pulses so that should get hotter.

Someone on here try both? I would like to know this too.

jakeachy · 07-09-2009, 02:44 PM

you need to make sure you're measuring all of the exhaust, but since we know cylinder 4 on ejs is always the problematic and hottest, i would put it right after the heads.

Atlas · 07-09-2009, 03:19 PM

I'd put it near the heads, on the 1/3 collector personally.

importracr86 · 07-09-2009, 03:32 PM

Quote:

Originally Posted by jakeachy

you need to make sure you're measuring all of the exhaust, but since we know cylinder 4 on ejs is always the problematic and hottest, i would put it right after the heads.

Isn't #3 the hottest?

07-01-2009, 11:52 PM	#1 (permalink)
Kyokudo Racing 1.8L My: Subaru Parts Join Date: Feb 2009 Trader Rating: (0) Posts: 3	EGT sensor ... were would you hook it up ?? For the pros. Were would you connect an EGT sensor due to the long length of the manifold runners. Usually I used to fit it directly in the Turbo exhaust housing but I think its too far away to get proper readings from the sensor. I was thinking because I have a 4-2-1 equal length manifold at the moment before the turbo on my GC8. I was thinking of sticking the sensor between runners 3 and 4 seeing that piston 3 is the most restricted aparently. What do you guys think ? Regards, Daniel J Vella www.KyokudoRacing.com

07-02-2009, 03:52 AM	#2 (permalink)
Storm 2.5L RS-T My: Subaru Parts Join Date: Dec 2001 Location: NE Ohio Trader Rating: (20) Posts: 5,840	Isn't it generally accepted to place the probe 4-6" from the head flange on a turbo motor? I haven't read up on it lately......that may be for NA motors and 6-8" back for a turbo motor. __________________ Jay Storm

07-09-2009, 03:19 PM	#5 (permalink)
Atlas 2.2L Turbo My: Subaru Parts My: Subaru Blog Join Date: Jan 2004 Location: Brooklyn, NYC Trader Rating: (88) Posts: 2,197	I'd put it near the heads, on the 1/3 collector personally. __________________ The last of my GC / WRX parts....

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07-09-2009, 02:31 PM	#3 (permalink)
kay95 Premium Member Car: 95 L, 96 OUTBACK Fav Mod: p1 SUSPENSION My: Subaru Parts Join Date: Jul 2004 Location: glen rock PA Trader Rating: (1) Posts: 2,513	There the two trains of thought. One that says it should be close to the valves. I found info from 3-8" from the exhaust valve. The other is at the collector is hottest because you measure all the exhaust pulses so that should get hotter. Someone on here try both? I would like to know this too.

07-09-2009, 02:44 PM	#4 (permalink)
jakeachy 2.2L Turbo Car: Widebody 3.3RS Fav Mod: Beating STis My: Subaru Parts My: Subaru Blog Join Date: Nov 2007 Location: WI Trader Rating: (9) Posts: 2,408	you need to make sure you're measuring all of the exhaust, but since we know cylinder 4 on ejs is always the problematic and hottest, i would put it right after the heads.

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