Im seeing 1400- 1450 when crusing at 4000+ rpm without boost. I have my sensor installed pre cat, quite close to the header. Does this sound within spec? Air fuel is 14.5-16.5 as it jumps around a lot. TIA

 

That sounds like what mine are but, I have a SC.

 

Me too!

 

Thats high for me, @ 4k Im about 800 Ive been trying to figure out what normal.

 

Where is your sensor installed at?

 

This got me thinking about EGT's so I did a quick search and found some interesting reading on the subject.

http://www.maxracesoftware.com/egt_probes.htm

 

Ok mines installed at the top of the cat. I guess that why mines so low.

 

Where would you install a sensor on a stock exhaust system? I am getting a T-netics kit and have the e.g.t. ordered. I just dont know where to or how to install it.

 

Ive stock exhaust. I would install it pre cat, but put it in before the turbo. Then you can check it one vs the other. I think placement has a lot to do with it.

 

I think 800c is close to 1475F. which is where im at.

 

The link shows that EGT probes should be put right next to the exhaust port to get a good reading . What surprised me is that higher compression motor runs cooler EGT temps that lower CR motor . The link explains why....good read

 

I have heard it is supposed to go as close to the head as possible, of course in the header.

By the way, I am also wondering what is a normal temp and what it means if you are running hotter than normal. I am going F/I as soon as my Vortech gets here and I would like to know exactly what the EGT gauge is telling me.

 

So this would have to be done by removing the exhaust manifold correct? Otherwise if you were to keep the manifold on the block all the metal filings would fall into your exhaust and into your turbo!! Well if you must take it off that is going to throw a kink in the works for me cause I was planning on doing the turbo install at my house. Any suggestions?

 

Isn't this really lean? IIRC, you want to be around 12.0

 

There are methods to prevent the metal shavings from falling in. You dont have to remove the manifold or turbo.

 

At cruising throttle, this is normal.

 

How are you going to leave me hanging like that!! So what are the methods?

 

Sorry..LOL. There are different ways to install the probe. Some people tap the manifold, but not actually drill all the way through it. This way, you get a pretty close EGT level, but there is a delay in allowing the gases to heat their way through the manifold.

The other way to to use a special drill bit, and vaccum/magentic device to suck up the filings. If done correctly, you will still get a tiny amount of metal into the manfifold, and your turbo will be fine, as this small matter blows through the turbo for a split second.


Guys have blown motors and blow LOTS of metal through the engine, exhuast valves, turbos, etc...and most had no issues with the turbo.

 

my egt sensor is in the downpipe...i see 1200 degrees at the most...i figure i need to add 200 degrees to that figure to be more exact..so i see around 1400 degrees at full boost- WOT...but i'm running pretty rich, i figure that keeps things a bit cooler

any thoughts?

 

So I am guessing that you have to get a bung welded into either the manifold or downpipe? If thats the case I am sure it will be much easier to just take the down pipe to a shop and have them do that really quick, rather than having to worry about tapping the manifold. I can live with having to add a couple hundred degrees to figure out the e.g.t.