Quote:
Originally Posted by Corbusa
Ok set me straight on what you think. I do like the OBX system ( a lot) and I was ready to order , But its only 2 1/2 in.. So I'd be better off with 3in.? whats the power loss dropping down a size in the pipe? I can not find 2 3/4 stainless pipe .. My thoughts are now to order the dynomax 17228 or 17519 . I found 3 in stainless pipe pretty cheap and I have a friend who is a pro who can install it.. just so I got it straight , 3in is better and the X pipe ( magnaflo) will replace the resonator? and it is 3 in..?
Will it be an issue to go from the factory exhaust 2 3/4 to the 3 in X pipe and make a connection? ( i'll do the OBX headers later ) , & I noticed the polished mufflers are cheaper , that seems backwards .. also what length exhaust tips are usually used? I see the muffler says 2 1/2 exits and the tip says 2 1/2 will that slip fit correctly? Well I guess that enough dumb questions for this evening.. Your wisdom are greatly appreciated..Thanks
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Okay, flame suit on here is my opinions for what it is worth. I personally cannot get the concept of smaller pipes than stock 2.75...period. Although proven my Marc H and others to provide more power, please see why on Marc's presentation here:
http://www.zr1specialist.com/HAT%20W...%20Systems.pdf
Having said that, I know the weakest link in my B&B system is the mufflers itself and I don't know that a 350 motor actually can benefit from 3" pipe, but I like it and have it already so I'm going to work with what I have. Beside it looks cool as heck from the rear and everyone says, "Wow, them are some big pipes!" Everyone has an opinion of what is loud and too much resonance, or their own reasons for why they like what they do and what sounds good to them. I have no idea what an LT5 sounds like with the dynomax ultra-flos but I like what I read and how some other cars sound on you tube. If you are a conservative person, you probably won't be happy and too loud and too much resonance.
As for the X pipe, I would not put a 3" unless that is the size of the exhaust you are using. I only chose the SW x-pipe because it is 3" and B&B would not work with me. As a matter of fact, I received my x-pipe from SW today and very pleased and not chambered, just plain x-pipe (will post a photo later). From what I found there was a little bit of clearance issues with MF and other X pipes with our narrow tunnel area and I also don't like the design and transition with too many degrees in the X.
About the tips that I wanted (double wall from dynomax) they are a bit long at 12" and 9" before the taper (3" to slip over pipe). A 2 1/2" tip is designed to slip over a 2 1/2" pipe. I'm trying to confirm the measurements since the dynomax is 1" shorter in length than my B&B mufflers and I think too much will stick out the back. Right now the B&B tips are flush with the bumper and I might need to find different tips that are a few inches shorter than dynomax 36473. I think dual 4" tips would looks awesome and double wall, rolled edge is nice with slant cut. Some have said that the doublewall might even help on drone, but not sure where it actually comes from. It might also help to have tips extent a little beyond the bumper too, but not sure.
If I was anywhere else in the US I would have ordered my dynomax ultra-flo mufflers and tips to get some custom work done. Here in Japan the labor is crazy expensive so I might live with my B&B, Version 3 (restricted mufflers) for a little bit and see how I like the X pipe first. Anyway, that is my 2 cents for what it is worth......not much, but it is my story and I'm sticking with it. The proof of principle will be when I get to tune and dyno my build so see if all the theories are confirmed.
If not in a rush, I would go to the Gathering and listen to all the Zs there to see what you like. Then max power is a whole different story and advice from folks like Marc H and Hib H and invaluable since they have dyno proof and years of knowledge and experience. Best of luck.
