This qustion is for the guys that have or had SS exhaust manifolds.
I recently went single and the kit has SS exhaust manifold. For the rest of the exhaust system I have a resonated midpipe and the Greddy PE. It was just the last couple of days that I noticed the exhuast glowing after moderate driving.
If it is a problem, how does one diagnose it? The boost is fine, the idle vacuum is normal. The only thing that seems to be out of the ordinary is a sound that vaguely resembles a siren that appeared recently. If it makes any difference the turbo exhaust housing is not glowing. The tuning is normal with 11.2-11.4 afr at full boost. I did tune the idle a bit on the lean side (14s), but I don't think that has anything to do with it. Any help and suggestion is greatly appreciated.

 

No one know about this at all?
Somthing else that is strange is the siren sound doesn't seem to be there when idleing, it's only when the car is moving.

 

...a lean mixture actually causes ignition to be hotter

..but I don't know if this is your problem

 

could it be the exhaust overheat sensor buzzing at ya? just guessign...


does that thing even work? hehe

carlos

 

timing could be too retarded.

 

You will get more replys in the single turbo section.

I know this is rather common after spirited driving and usually seen at night. It has alot to do with EGT. This is a combination of Air to Fuel ratios and timing.

Chris