Glowing exhaust manifold

[toutsuu]

Now that I had the biger intercooler and MAF translater installed I notice that after some highway driving (including some boost accelerations) when I parked the car in my dark garage I could see the exhaust manifold barely glowing through in between the heat shields.

I never noticed it before but I know my engine has always gotten pretty hot even before the work. Is this a sign of running to lean or too rich or is it normal to glow a little bit after some highway driving and a few boosts (at 11 psi)? Keep in mind you could not see the glow with the lights on, just in an almost pitch black environment. Also water temp is fine.

I should state that the MAF translater was just set to the 450 injector size and zeros for mid and full throttle, as in no adjustment leaner or richer. My auto meter a/f gauge which just has 3 zones for lean,stoich and rich was reading in between the rich area. I realize this is an inaccurate gauge because it reads off the stock O2 plug and is why I am wondering if I might actually have been running too lean.

[XakEp]

das ist normal

[burnett03]

Not quite sure what Quin was saying, but.. The glowing is normal.. Another reason to turbo time the car after you boost it.

[ktiedt]

Even a NA car will get that hot at the ex mani... just because it glows, isnt a reason to turbo time it...

Turbo timing is to help protect the turbo anyways...

[Wazzelby]

Glowing is normal. My car's manifold would glow when it was bone stock if I boosted enough.
^ agreed, turbo timing is more to cool the oil in the turbo so it doesn't cook itself by sitting in a hot turbo after shutting the car off. By letting the car run the turbo has a chance to cool.

[burnett03]

Even a NA car will get that hot at the ex mani... just because it glows, isnt a reason to turbo time it...

Turbo timing is to help protect the turbo anyways...

Umm yes it is.. It's an ever better reason to make sure you turbo time it.. Imagine that turbo glowing red hot and you just shut it down.. The oil in side is bound to cook.

[ktiedt]

Umm yes it is.. It's an ever better reason to make sure you turbo time it.. Imagine that turbo glowing red hot and you just shut it down.. The oil in side is bound to cook.

we are referring to the exhaust manifold as "it" not the turbo... the exhaust manifold has nothing to do with turbo or turbo timer in this case...

Exhaust mani has NO oil running through it to cool it... so it being red hot says nothing about the turbo since it *is* being cooled

[burnett03]

we are referring to the exhaust manifold as "it" not the turbo... the exhaust manifold has nothing to do with turbo or turbo timer in this case...

Exhaust mani has NO oil running through it to cool it... so it being red hot says nothing about the turbo since it *is* being cooled

Wait, the exhaust manifold doesn't have oil running through it? The exhaust manifold glowing red has nothing to do with the turbo? Not true, go outside and look and see what is connected to your exhaust manifold.. It's the turbo. And usually if the exhaust manifold is glowing red the turbo is also glowing red, which shows that you might want to turbo time the car a bit longer to get all that to cook down to prevent oil cooking. If you shut the car off with the exhaust manifold glowing, and the turbo glowing, nothing is cooling the turbo anymore.

[ktiedt]

You miss the point, maybe you should try and leave your attitude off the keyboard and actually read things. the TURBO is cooled, it will NOT be as hot as the manifold.

If it truly were the case that a hot manifold means you should time your car... guess what, most cars would probably either a) come with a timer, b) come with a warning..

The fact is you can drive your easy for just a little bit, and timing is not needed...

[Kibo]

The fact is you can drive your easy for just a little bit, and timing is not needed...

That's what I usually do, although I must admit that I have a turbo timer installed on my DD right now (mainly because I had it just sitting around). Occasionally I find it useful, though--i.e. to keep the car running so it can warm up outside in the winter time without having to leave the keys in the car.

It's also handy to keep the fans running after shutting the car off (via the A/C button) while sitting in the staging lanes at the drag strip or the grid at an autoX, again without the keys. I have small batteries in my cars, so it's important to have the fans shut off after a certain amount of time--otherwise I could walk away from the car, forget that the fans are running, and end up draining the battery.

[burnett03]

Nothing to see here

[Wolf]

Last edited by Kibo : Today at 12:55 PM. Reason: Ryan's taking a Time-Out


Dont say that too loud, my daughter is in kindergarten and has a tantrum anytime the timeout chair is mentioned. :p
Mike