Do ya love yer sidepipes???

[Jon Miller]

Here is a look down the length of the Stainless Specialties "Muffler". I've got mine the "quiet" direction, louvers forward, and they are plenty loud. Given the straight pipe with bumps design I can see why there is only a 5hp loss. I have not dynoed mine yet, I'm still in the tuning phase.....

-Jon

[wtm442]

Have your cake and eat it .....

http://www.pfyc.com/store/merchant.m...ory_Code=VTEXH

[Rare Iron]

With the minimal amount of exhaust system assy. on these cars, if you are going to achieve quiet, you are going to lose major HP. There are 2 effective ways to quiet down relatively short sidepipes: 1. Squeeze the flowpath diameter so small that flow is significantly reduced, & add soft packing material to absorb flow (current stock systems - 1-7/8" +- flowpath approx.). 2. Use a non straight-through muffler core inside the muffler cavity. Walker used to build a muffler that looked like a glasspack externally, yet had two (very small dia.) staggered flow tubes internally. These were called "Royal Scots." Flow on them? Terrible. Noise reduction? Yes.

Now, if you want sound attenuation qualities + good flow, you'll need at least a 2.5" (OD) flowpath & soft packing to absorb. If you are over 480 flywheel HP, run a 3" (OD) core muffler with soft packing. I believe this will give you the best of both worlds - as good as can be hoped for. Run as long of a muffler as you can fit - shorten the collector & shorten the exit spout.

There's no sense spending THOUSANDS of dollars on a high HP motor only to have your mufflers rob you of 100+ HP (not to mention torque) in the power band.

-The Powerstick/Cobrapack blacksmith.

[undy]

I talked to Classic Chambered Exhaust this evening, nice of them to call me back after hours too. I think I've pretty much made up my mind to replace the Spiral Turbo inserts in my 4" pipes with The custom made 3" flow path inserts by Classic. They'll custom make them to fit inside my existing 4" pipes and to the length I require. Howe also makes a killer 3 1/2" flow path but unfortunately it's not an insert. They would require entire new sidepipes, new ceramic job too. Howe's mufflers have the same OD as my sidepipes. I think Howe's muffler is significantly louder than Classic's is too. I don't think that they'll do custom lengths either. That, with what I know now, persuades me to give the nod to Classic.. They've some dyno results on their web site's that pretty impressive.

....any one have a better mouse trap??

Dave