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Why is a straight exhaust pipe not ideal?

Ideal
i?de?al
īˈdē(ə)l
adjective
1. satisfying one's conception of what is perfect; most suitable.

Instal a straight pipe and if you like it, keep it.

If not add a muffler or two until the tone tickles your fancy.

For me, down pipe into a 3" cherry bomb is a symphony of harmonics and performance.
 
quillc said:
^

I run an 83 242 with a ~10.5-10.6:1 B23. H cam. Stahl header.

I DD it 134 miles a day.

I noticed a difference when I swapped from the teeny tiny stock exhaust to a 2 1/2" system. I was originally running a Flowmaster 40. That was way to loud and terribly droning on the highway. Switched to a Flowmaster resonator with a Super 50. Still sh*tty loud. No difference in power BTW on the butt dyno. Put a giant flowmax muffler on it. Left the resonator on it. Acceptably loud. No difference in power. No difference in idle. Next time I build an exhaust for the car, I'll get the biggest 'truck muffler' I can find that will fit.

These cars don't make enough power to really see the difference between muffler styles - or straight pipe for that matter. If you put a good 2 1/2" system on an NA car, it'll handle whatever you can throw at it in an NA car. Turbo is of course a different story altogether. Running a 500+ LS motor in there - different story. 2.3L I4? Not going to matter once you hit a decent 2 1/2" exhaust. 3" is fun, but a waste in NA unless you are going wayyyyy farther building the car.

Whether your motor has enough compression to take advantage of an H cam is another matter.
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Thank you Chris, best post I have read on the topic.
 
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