WookeysRX7

K guys, i have an assumption and i was wondering if you could tell me if i am correct.


K, i got my motor rebuilt 2 months ago, and since then whenever i drive my car the turbo glows red, whether i boost 2psi or not. So i am thinking(also another rotory guy too) that fuel is being burnt of in the turbo. So, i pulled my plugs today and noticed that the electrodes on the leading plugs are rounded to kinda a tip not flate like they are suppose to be. So would it be safe to assume that the unburnt fuel would be caused by lack of spark and what not?

I dunno, maybe i am totaly wrong, can anyone elighten me?

YearsOfDecay

Rotarys eat spark plugs... avfter 2 months, they probably aren't gonna have flat eletrodes anymore anyway..

is your cat plugged up????

WookeysRX7

so the turbo glow could be a result of the spark plugs leading to unburnt fuel?

No clogged cats, i have racing beat exhaust turbo back.

TII

check the timming to see if its sparking at the right time had the same problem with the red turbo and it was because the bolt on the crank angle sensor was loose and timing was off

Rex4Life

Take a look at this thread: Turbo Glow

Here's my take on it:

I'm running into a similar situation. Can't see the turbo but the heat shields are turning brown and I know it is getting real hot. My motor is also a rebuild and did not use new housings.

Here's what I think is happening. Somebody pipe in if you think otherwise.

Since I also have a new rebuild, the motor is slowly building itself up in compression. This means I am currently running below normal compression and suspect that the motor is unable to completely burn the fuel. Basically the ECU is injecting the right amount for a good engine -- not one building compression. So in essence I am running rich and really can't do much about it except break in the engine and that will take time and miles. That extra fuel is getting burnt late in the cycle and in the turbo.

I am also running 93 octane--thought this would be helpful since I don't have the hood scoop on yet. Anyway, I'm going to reduce the octane to make the fuel burn quicker and hopefully more of it in the engine. First I'll try 89 octane and if all is well go to 87--and yep that means lay off the boost--although I am already due to break in.

Scott