Just wondering, what is a safe exhaust temp to tune off of, when under full boost?

Just wondering, cause mine have been lookin kinda high lately.

 

 

ppl are usually around 1,300 to 1,500. Meines for some reason never sees past 1000... porlly cuase I put it in the downpipe but that should effect it that much. oh well.

 

Mine runs around 1470 deg. fahreinheit, sometimes lower than that.

 

There is a large difference in temps between a probe in the manifold and a probe in the downpipe.

Do you have a wideband? I wouldn't tune off of EGT alone!

 

Should be here Monday! :D

EDIT: Yeah I jsut did an hour of search. can;t really find any solid answers as to how mcuh difference in temperature change. some say 300 F soem say 500-600F. I made a new thread for it.

 

I have heard that typical variation is around 500°F. I see as high as 1600°F on a long highway boost session with an air/fuel ratio of 12.0:1. That is a little high, but it's 'cause I'm not running enough ignition timing. (Oh, and it's an 8 valve VW motor, so not really anything useful for your purposes, but gives you an idea).

 

i get usually like 1400-1450 on the highway in 5th at 3k-3.5k rpm.. it never goes higher then 1450. Usually around town it will be no more then 1200 F

 

anyone else, cause im interested as well. someone told me that if you go above 1300 then you are going to burn the pistons up. i have a 12:1 ls vtec all motor, when im on the highway, full throttle, i get up to like 13 and i shut it down cuase im afarid of what i was told. anyone?????

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RidinlowHatch &raquo;</TD></TR><TR><TD CLASS="quote">anyone else, cause im interested as well. someone told me that if you go above 1300 then you are going to burn the pistons up. i have a 12:1 ls vtec all motor, when im on the highway, full throttle, i get up to like 13 and i shut it down cuase im afarid of what i was told. anyone?????</TD></TR></TABLE>

burning pistons at 1300 degrees F? no. Whoever told u that deserves a . 1450 is normal for cruising speeds. I also know a few people who see 1550 cruising .. ask that dude why they havent burned anything yet? boosting for a while now. no issues

 

thanks for the insight. what baout at idle, just sitting there, sometimes im at 7 and sometimes im a little below 6

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RidinlowHatch &raquo;</TD></TR><TR><TD CLASS="quote">thanks for the insight. what baout at idle, just sitting there, sometimes im at 7 and sometimes im a little below 6</TD></TR></TABLE>

at idle im around 7-800 F after car warms up fully..

 

thanks again

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RidinlowHatch &raquo;</TD></TR><TR><TD CLASS="quote">thanks again</TD></TR></TABLE>

no problem