How Restrictive are the stock Mufflers? This much.....

[s/c'd cav]

There is "clearly" a set of assumption being deployed here (from both perspectives).

a) The rpm range in question does indeed take into account daily driving (i.e., passing on the freeway, freeway on-ramp accelerations, passing in many other quasi-normal driving conditions). The assumption that WOT is "purely a track only" premise - has just a wee bit of oversight.

while the rpm range in question is and can be used during normal driving , how often do any of us have our foot to the floor , if we did our rear tires wouldnt last but a few months

if you block/limit your gas pedal to say only open 30% , 50% , 75% and dyno it that way , youll see alot lower readings from the dyno , which is my point

granted we all build our cars for different reasons , but we all do it for the fun and enjoyment , and random fun out of the country , so hopefully you understand my point , i wasnt trying to rain on the parade

[hflores3]

Nah - no raining on any parades. This was a healthy exchange.

"......Block/limit gas pedal to 30%, 50%, 75% ...?" You kidding me? No way Jose! :-).

If I'm going to pass someone - or get on the on ramp - it's going to be with some internal combustion enthusiasm! :-)


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[s/c'd cav]

amen , man AMEN !!!!

[norm8332]

Wow that's allot. I have to put the corsas back on but need a fuel pump upgrade first imo. hows the ZL1 pump treating you?

[hflores3]

ZL1 pump with JMS a Booster is holding up.


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[farsighted770]

when you're that modded yeah its a restriction, but for a bolt ons cars the muffler isnt your choke point.

neat to see the difference, and your car looks healthy

[09redgt]

I'm in the middle of my cam/head install. But I have the vortex 3" in and out mufflers and a 3" xpipe sitting here. You might beat me on installing of the exhaust. If you get them on. Please let me know how they sound. Thanks

[hflores3]

I'm in the middle of my cam/head install. But I have the vortex 3" in and out mufflers and a 3" xpipe sitting here. You might beat me on installing of the exhaust. If you get them on. Please let me know how they sound. Thanks

Will do.....

[reddeadg8]

i wonder what the difference is between the 2.5" and 3" Vortex. wonder if it is just noise or actually flow too

[hflores3]

i wonder what the difference is between the 2.5" and 3" Vortex. wonder if it is just noise or actually flow too

No idea my brother.... I would "surmise" there is additional flow there -- but no way to validate on my side.