mac longtubes

85_SS_302_Coupe said:

This only backs up everything i've said in this thread. Like i said, for quoting the hell out of every post i make, you guys have completely missed the point i'm trying to make and this thread is so far off base that it's useless to the original poster now.

As i said before, i just don't think HIS car needs 3'' exhaust. But, i'm by no means as expert, nor is anyone else in this thread so my advice from here out is to take it to a shop with a dyno and talk with the pros since this thread is going nowhere. Besides, aside from it being a 347 with Mac headers and 3'' exhaust, none of us know anything else about the guy's combo like heads/cam/intake/RPM range so i don't think anyone can really make the right call, and i don't think assuming a 3'' is right for it just because some other combo worked well with it.

Personally, i just can't get my mind off all the production 500+hp cars that are doing just fine with 2.5 inch exhaust systems. Saying that they might make more power with a 3'' system or with open headers is a moot point...the fact still stands that they're making more power than this guy is likely going to make and they're doing it with a full 2.5 inch emissions passing exhaust. Why can't he?

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joel5.0 said:

a performing car is a COMBINATION of parts set to work together, since you are too focused on the exhaust ID...... that's a good combo with a 2.5" exhaust setup.

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