Re: Why rebuild?
> I have a 1978 Datsun 280Z running stock
> intake, fairly well tuned, but has a knock
> developing on number 5. The exhaust consist
> of OEM pipe to the hollow cat. out to a
> Cherry Bomb glass pack. I went in for
> testing yesterday and my car passed with
> flying colors. In TX the highest your
> reading can be is 750 ppm, I don't remember
> if this is CO or what but it relates
> directly to the cat. Anyway at idle my
> reading was 118ppm and at running speed it
> was 12 ppm. The inspector said the 96 Ford
> Taurus in just before me didn't test that
> well. All of the other reading on my car are
> also very low. I am not saying cut off your
> cat. I am just stating that if a car is
> tuned to utilize all the HP the motor can
> produce and is in good working order, most
> emission control is unnecessary. I have no
> EGR or other such non-sense on my motor. She
> runs clean and strong, I think this might
> not be legal, but at least my moral problem
> with polluting the air is gone.
> John Cooney
> Clean but not legal....
Then, why do you want to rebuild your engine? It sounds great! Is it because of that knock? You can take care of that with out rebuilding, it may not even be a valve, could be the rocker arm, or something...
> I have a 1978 Datsun 280Z running stock
> intake, fairly well tuned, but has a knock
> developing on number 5. The exhaust consist
> of OEM pipe to the hollow cat. out to a
> Cherry Bomb glass pack. I went in for
> testing yesterday and my car passed with
> flying colors. In TX the highest your
> reading can be is 750 ppm, I don't remember
> if this is CO or what but it relates
> directly to the cat. Anyway at idle my
> reading was 118ppm and at running speed it
> was 12 ppm. The inspector said the 96 Ford
> Taurus in just before me didn't test that
> well. All of the other reading on my car are
> also very low. I am not saying cut off your
> cat. I am just stating that if a car is
> tuned to utilize all the HP the motor can
> produce and is in good working order, most
> emission control is unnecessary. I have no
> EGR or other such non-sense on my motor. She
> runs clean and strong, I think this might
> not be legal, but at least my moral problem
> with polluting the air is gone.
> John Cooney
> Clean but not legal....
Then, why do you want to rebuild your engine? It sounds great! Is it because of that knock? You can take care of that with out rebuilding, it may not even be a valve, could be the rocker arm, or something...