I just got my exhaust cutout installed before the cat and muffler. It sounds AMAZING, but i noticed my car started running very hot. Is this a coincidence? or can cutouts lead to overheating? Any advice would be helpful....

 

Its shouldn't be overheating because of the cut out...

 

You could be running a bit lean causing your temps to go up.

 

it shouldn't lean it ou that much though

 

... especially if its a TPI motor. The computer would be able to adjust for that.

Now if he had a carb'd motor, that could easily be the case, but since its TPI, I doubt its leaning out.

 

The goal of a cutout is to help speed the gasses through the exhaust system.
Assuming the fuel delivery remains accurate and things like that,

According to physics(what I know of it anyway)...

If the gases are traveling faster, they will spend less time "underhood" meaning they will give off less heat there.
So by uncorking your exaust system, your temps should(at least in theory) lower. Keep in mind that the rest of your exaust system may run hotter, due to hotter gases.

I would check elsewhere for problems, probly start with the cooling system.

 

Depending on the position of everything, exhaust gases which are quite hot depending on, again, the location of the cut-out might be radiating upwards rather than out and behind the engine bay. A bit far-fetched, however, I had an exhaust leak get real bad, right at the header to y-pipe connection, injecting exhaust into the engine bay because of a restriction in the exhaust track after the leak.

I popped the hood after the car went over 230*F to find everything extremely hot. Ya know that neat convoluted tubing, all of mine was now made out of marshmellow.

Of course, I replaced almost everything in the cooling system besides the fans because an obvious visual inspection cleared them.

Take it for what it's worth, just my two pennies.

Mike Gray

PS- the exhaust gases are also moving faster, as pizza guy said, but when you put energy into most systems, they radiate some amount of thermal energy. Same reason air compressors get hot - compressing the air is energy input thus yielding thermal energy. In my opinion, both of our little tid bits are negligible with regards to his problem.