After running my car for about 20 minutes at no boost, the exhaust side of the turbo turns red.. like glowing red.. i need some ideas on what it can be any help is appreciated.. thanks

 

alright...when you mean no boost I am going to guess that you are accomplishing this by not having the compressor side connected to anything, right? Or a MAJOR boost leak? If so, what is happening is that the turbo is spooling up, possibly as fast as it will go, since there is no load on it (not having to make pressure). Assuming this is what happened, your turbo took some hard miles, possibly needs a rebuild, but I'd just see how it runs first. Make sure you connect the charge pipes IMMEDIATELY, or take the turbo off if this is what happened.

Erik

 

thanks for ideas, but i forgot to mention.. i can boost if i want to, it builds up but even when i'm at cruising speeds, not punching it.. it will heat up and glow red..
-there are no leaks,
-all the hoses are holding boost,
-turbo was rebuilt not too long ago..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ion_four &raquo;</TD></TR><TR><TD CLASS="quote">alright...when you mean no boost I am going to guess that you are accomplishing this by not having the compressor side connected to anything, right? Or a MAJOR boost leak? If so, what is happening is that the turbo is spooling up, possibly as fast as it will go, since there is no load on it (not having to make pressure). Assuming this is what happened, your turbo took some hard miles, possibly needs a rebuild, but I'd just see how it runs first. Make sure you connect the charge pipes IMMEDIATELY, or take the turbo off if this is what happened.

Erik</TD></TR></TABLE>

That's called turbo surging.

Anyway, I haven't heard to much about this but a while back before I was thinking about turbo a guy was telling me his did it also, Best bet is to get an EGT gauge. I don't remember exactly waht it means. It may not mean anything, this is a question that i have not been told or asked.

 

no, that is not surging, at all....
the glowing is due to most likely too rich of a mix, or too lean, either conditions will produce high exhaust temps, do get an EGT and watch your temps. listen for pinging as well. have it tuned.
Stan

 

is your ignition timing really retarded? that will also cause you to run really high exhaust temps leading to your turbo to glow red

 

ok i do believe the tuning is really rich.. dirt rich..
i set the timing to 0 all the way without boosting just to see if the turbo turned red, which it did..
i guess i'll go try to lean it out and see what happens.

Thanks a lot guys, ill go try that out.

 

retarded timing will cause high EGT's.

 

Do not set the timing to zero. Set the timing to stock or retarded 1-2 degrees for 6-8psi of boost.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 90crxsi &raquo;</TD></TR><TR><TD CLASS="quote">no, that is not surging, at all....
the glowing is due to most likely too rich of a mix, or too lean, either conditions will produce high exhaust temps, do get an EGT and watch your temps. listen for pinging as well. have it tuned.
Stan</TD></TR></TABLE>

No I meant when he was stating the turbo spinning freely, But know reading I knew that's what it was when the motor is running really rich. I wasn't sure so i didn't speak on it. Thanks for the clarification.