Going to drive hard at the track

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news - 03 Apr 2006 03:06 GMT

Question for Steve or anyone. I have replaced my muffler for a resonator so
it is loud but nice. Still have cat and with stock pipe 2 inch diameter.
The question is if I am driving this car hard 3rd speed and 4th mostly..
that mean reving the engine up to 5500 rpm, should I be concerned about
engine valves since my exhaust has been modified. I don't think back
pressure is something I want but few ppl are telling me that I need back
pressure. My car is 1987 300ZX N/A 2 seater with 5 speed tranny. Car
manufacture date is 01/87 so I guess I don't have "W" engine (still need to
confirm this)

>> will be running fresh synthetic oil. Synthetic 5 speed 75W90 oil and

differential as well. Anything I should be concerned with? cooling is okay
and timming belt is about 6000 miles or less

Thanks in advance.

Paul

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Steve T - 05 Apr 2006 04:43 GMT

> Question for Steve or anyone. I have replaced my muffler for a resonator
> so
> it is loud but nice. Still have cat and with stock pipe 2 inch diameter.
> The question is if I am driving this car hard 3rd speed and 4th mostly..
> that mean reving the engine up to 5500 rpm, should I be concerned about
> engine valves since my exhaust has been modified.

Nope, isn't even an issue. People that say you "need backpressure" are
clueless people who have confused fuel metering issues with the need for
backpressure.

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Steve

http://www.atlantaracing.com

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news - 06 Apr 2006 01:06 GMT

Thank you!!

> > Question for Steve or anyone. I have replaced my muffler for a resonator
> > so
[quoted text clipped - 11 lines]
>
> http://www.atlantaracing.com

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