normal/safe/boosted egt?
 

just installed my autometer egt. autometer recommends to install it 1-2 inches from turbine outlet on boosted and 1-2 from head in manifold on n/a cars. i installed it just after my turbine outlet in the downpipe. what is normal safe boosting egt. the most i've seen so far is 1300 degree. that was during a 110mph+ pull full throttle shifts 11psi boost starting from 1st gear. 11.0-12.0 afr and not hearing any detonation.

what do you guys think?

Re:normal/safe/boosted egt?
 

I wish I was smart enough to tell you, but TTT because I want to know too.

Re:normal/safe/boosted egt?
 

I would say close the gap on the plugs a little bit. mabe like one point, and then retard the timing to about .75 degrees per lb of boost and it should bing the egt down a little. it seems a little hot to me. but not that hot.

Re:normal/safe/boosted egt?
 

But shouldnt it be a little hotter since it is after the turbo?

Re:normal/safe/boosted egt?
 

Correct me if I'm wrong, but I thought retarding the timing actually increases EGT?

And I would think the EGT would be lower after the turbo just because it is further from the point of combustion. It should also be lower because part of the thermal energy (hot exhaust) is being turned into mechanical energy (rotation of compressor wheel). Then again I am no physicist (can't even spell it ;)) so I may be wrong and sometimes I wear glasses to look smart . 8);D

Re:normal/safe/boosted egt?
 

Burning lean and rich will increase EGT... You have to find the sweet spot. As to what the ideal temp is... Not sure... Don't know enough about turbos yet... TTT!

Re:normal/safe/boosted egt?
 

Burning rich NEVER is as hot as burning lean though. Why do u think pistons' puddle and valves get burnt? Too lean...never torched a motor from runnin too rich. ;D

Re:normal/safe/boosted egt?
 

I'm afraid I must disagree. Running rich will raise EGT as well as keep more of the pipe hotter for a longer time. Running lean doesn't get your engine any hotter, EGT's will go down but the destruction comes from leaving extra oxygen in the cylinders and on your red-hot pistons that just saw a temperature spike. I like this analogy- say you are using a firesaw (torch) and you wanna make a cut. You put the fire up to the metal, get it hot as hell, then blow a whole bunch of extra oxygen through it. You cannot make a your charge give off less heat by taking away fuel and leaving a less-than-stoich mixture. I ran really rich for a week. I burned out two stainless flex pipes. Running stoich or lean wouldn't do that.

Re:normal/safe/boosted egt?
 

I knew I wasnt making ---- up... ;)

Re:normal/safe/boosted egt?
 

so was I right? I am hella confused now.

Re:normal/safe/boosted egt?
 

I have a digital egt gauge and i'd like to know the answer too!

Stan

Re:normal/safe/boosted egt?
 

Not that I don't trust any of you, but I'm reading conflicting views here, and I don't know any of you from Adam, so does anybody know where there's some sort of article or something that I could read about ignition tuning and the significance of EGT readings.

Re:normal/safe/boosted egt?
 

if running rich fucks up your engine anyway, why is it that the computer (on your car) is programmed to run rich in "limp (dick) mode".

Re:normal/safe/boosted egt?
 

I don't think that running rich is that bad for your car if you don't do it for very long. If you are always running rich though, you can mess ---- up.

Re:normal/safe/boosted egt?
 

running rich usually does a few things:
1. washing rings/cylinders if it's too rich.
2. saturating o2 sensors
3. plugging cats
the melting/burnt flex pipe is because the gas is backfiring/igniting from all the extra fuel in the exhaust.

from what i've came across so far it sounds like i'm on with just retarding 1/2 degree per pound of boost like i've been doing. i run a wideband daily and i know i've been running on the rich side, but the butt dyno feels like good power. just trying to extract the most out of it, but be safe at the same time.

Re:normal/safe/boosted egt?
 

So, if running rich is a bad thing, wouldn't you want to run more towards the lean side? Don't think so. You have to run richer in a turbo setup. Think of it this way: the burning air/fuel mixture in your cylinder acts like a torch...increase the oxygen content and you start burning through stuff;increase the fuel, and yes, it warms things up, but doesn't act like a blowtorch. If you have additional cooling around the cylinder wall, you decrease the temperature inside the cylinder itself, and decrease the "red hot" effect. It's a fine line of cause and effect.