safe egt's on stock block
 

anyone know what a good safe egt would be for the stock motor? and also, does anyone know what the max should be?


thanks
Emery

I'm glad you posted this, as it reminded me of my highway trips home from the girlfriends house all week. I had always seen about 1,400 degrees F cruising all the way up to 1,600 max. My egt probe is right in the #2 runner in the exhaust manifold, about 2 inches away from the cylinder. In 5th gear, right around 140-150mph, about 5-6K rpms, my egt's start to go up to 1,700 degrees F! At that point, I backed off in fear of melting my cylinders and such. I'm not trying to steal your thread, but it hopefully will answer your question. Is 17 too high for me? It never goes to 17 in any other gear at any rpm, but in 5th it wanted to jump up there. I'm afraid to max out my car now because of this. I do have a custom dynoflash and have the usual bolt ons. Turboback, intake, mbc, fuel pump, bov, ic pipe, etc.

anyone?

Tttttt.

I usually run between 1300 and 1400 up to the 4000 rpm range any higher it hits about 1500 to 1600 all out! but it quickly goes down after that. Its a tough question because it heats up through the rpm ranges.

As long as you stay below 900C/1650F you are fine.

900C/1650F pre-turbo max. Normal should be 825-850C for safety reasons. "Normal" will be more dependent on your tune, and not the fact that your motor is stock. High EGT's will cause pre-detonation (bad for both stock and built motors) due to A/F ratios or timing, or... in the extreme melt the aluminum parts that are common to both stock and built motors.

Rule of thumb, as EGT's go up, leaner A/F ratios, octane rating of the gas, and timing advance will lead to pre-detonation. So it's a balance between all four.

thank u.


emery

i just had an EGT probe installed 2 days ago. i was adjusting my boost last night because it was spiking a little bit. i have zeitronix installed on my car. after adjusting my boost i looked down at my lcd readout. my EGT wasn't working anymore. it just stuck at 200. could my EGT probe have been damaged somehow? any help anyone can give me would be appreciated. thanks.

Disconnected somehow?

no i checked. i pressed the button on the side of my zeitronix display and i'm not sure what the button does but i saw 920 on it. do you think that somehow the egt temps got higher than 900 and damanged the egt probe? the thing i dont understand is that when i had my car tuned they said i wouldn't have to worry about my temps going above 850's.

EGT temps are so overrated. There are many cars on a FINE tune running great with temps upwards of 900degrees celcius, and there are cars that run 900degrees celcius who run like crap. Remember unnecessary fuel causes hot temps as well as too lean a condition. I wouldn't depend on EGT temps to tell you too much unless you have a wideband, (in which case its not necc. at all -IMO). Do NOT tune via EGT temps..not a smart idea.

+1 on any block.

i was told that the reason my EGT isn't getting a reading could be a grounding issue. my EGT was working fine for about 2 days. why would it stop all of a sudden?

Bad ground can be a reason. Ground finishes a circuit, if there is a poor ground it'll cut in and out and in some instances not work at all. Check to see if the ground wire is installed on a BARE metal piece (apart of the frame -a painted portion of the metal doesn't count as a good ground).