2 step and chambered muffler setup

[AlbertD]

I remember reading a while back that it is possible that fuel may be ignited in a chambered style muffler causing the muffler to eventually fail while using a 2step. Has anyone had any first hand experience with this issue? I know Matt D was running Macs with a 2 step, but I don't recall him ever running into this problem. I tried searching, but no luck.

I currently have Pypes LTs, o/r x, and Mac axlebacks. Going to be putting a WOTbox on the car within the next week, but I don't want to blow out my Macs.

Post up any comments or knowledge you may have! Thanks.

 

[dysan]

I nearly blew apart my stock mufflers with the WOTBOX but I don't think it was the 2-step...I believe it's the no-lift shift which will cause the occasional backfire.

 

[fdjizm]

Yup I blew up my mufflers, made a thread...
http://www.s197forum.com/forum/showthread.php?t=66711

the wotbox won.
I have straight thru's now and I get the flames but not muffler explosion because the pressure is being let right out.

 

[Full_Tilt]

It can happen.

Would I worry about it happening? No.

 

[Chilliwack 42]

I have flows and an MSD 2 step, haven't had any issue yet.

 

[AlbertD]

Hmm... Good info! Well I do intend to use the no-lift feature so... anyone wanna trade some straight through mufflers for Macs? I'll make a separate thread when I get a chance. Thanks everyone.

 

[dysan]

I have flows and an MSD 2 step, haven't had any issue yet.

That's because the MSD doesn't have the no-lift shift feature. It's the occasional backfire from the no-lift shifting that causes the chambered mufflers to fail.