EGT readings?

[Kras]

My car came with an HKS EGT gauge installed, and I've played around with it a little bit.

Anyways, my question is - what is a normal exhaust temp for the 26?

I've hit about 950*C during hard driving, that seemed about as high as it will go. During normal driving it rarely goes over 850.

These temps seemed a little high to me.. I'm thinking maybe the gauge is inaccurate? The probe looks to be installed in the turbo mani itself.

I am pretty sure I'm not running lean as anyone I drive with says I have black smoke (excess fuel) coming out the exhaust pipe... they also say that my car sometimes shoots flames for a few seconds out the exhaust as well lol.

Any input?

[mcfly]

advance your timing a bit and see if the temps go down. it sounds like you have fuel burning in the manifold/turbo still.

850 is way to high for normal driving
and 950 even pre turbo is about ready to kill components.

[GTR-Dad]

950C is as high as you should let EGT get.

Advancing timing will allow more energy to be transferred to the piston thereby reducing EGT, but bring you closer to the knock threshold. If you advance timing, be sure to pay lot's of attention to knock!

Dan

[LeKing]

Im wondering if this apply to my RX7 I have egt where my O2 sensor was right after turbo when i cruise i get 8-900 = a/f14.7 to 15.2 if i let go the feeder it drop down near 800 since its so close to the turbo if im WOT she ll go close to 1000 ?

[Kras]

It seems strange to me because my setup is pretty close to stock and I am running the factory ECU...

I can advance my timing with CONSULT am I right? By how many degrees would be a logical start?

[Kras]

Reset ECU with batt disconnected etc. Hiopefuly the ecu corrects for proper ignition timing, I will also connect consult today and check ignition timing...

[GTR-Dad]

Check timing with a timing light on coil #1. You can either place the pickup around the 'hot' wire leading to the coil and slide the pickup right up tight against the coil OR get a short plug wire, put one end on the plug and the coil on the other end and put the timing light pickup around the plug wire.

OEM timing is 20 deg BTC at idle. You adjust this by loosening the three bolts that hold the crank angle sensor (CAS) in position and rotate it to adjust timing.

I'd check it and adjust it to 20 degrees. If you advance it beyond that point you'll be counting on the knock sensors to detect destructive events within your engine and retard timing for you to avoid wrecking your engine. If they fail, well, so do you. And knock sensors are not known for their reliability.

Bottom line is, be very careful when you mess with ignition timing.

Dan

[Kras]

Yea I saw base ignition timing was 20 deg BTDC in the service manual...

Checked timing today with CONSULT (gotta love working at Nissan) and it is spot on 20 * BTDC so I don't think that's the problem.

I think I will just installed a boost controller and turn up my boost

EDIT: possibly will buy a innovate lc-1 wideband as well as I believe it doies EGT as well.

[GTR-Dad]

Yea I saw base ignition timing was 20 deg BTDC in the service manual...

Checked timing today with CONSULT (gotta love working at Nissan) and it is spot on 20 * BTDC so I don't think that's the problem.

I think I will just installed a boost controller and turn up my boost

EDIT: possibly will buy a innovate lc-1 wideband as well as I believe it doies EGT as well.

Consult can not tell you what your timing is. It tells you what the ECU is calling for assuming base timing is actually set at 20 deg.

It's hard to get good advise on the internet, but you'll do well to listen to this.

Just saying....

Dan

[Kras]

Consult can not tell you what your timing is. It tells you what the ECU is calling for assuming base timing is actually set at 20 deg.

It's hard to get good advise on the internet, but you'll do well to listen to this.

Just saying....

Dan

Oh I see... I guess I'll have to find a timing light then

[GTR-Dad]

[Kras]

Thanks for the help guys. I think I found out what my problem is... my gauge is loopy.

I've been paying close attention to it and if I hit a large bump in the road the needle will kind of spasm and sometimes stick at random numbers. I'll probably be picking up either a new EGT gauge or a wideband that supports it.

I am still going to check my timing though as I realized the ECU is kind of helpless if the CAS is set wrong, as the ECU uses it as a reference when adjusting timing.