CHRISPY

I have been thinking about how to reduce weight in the exhaust without deafening myself with turndowns under the axles.
What do you think of the following?
MAC headers with Ypipe and 2.5 bullets in the Y.
Cut off the Y portion of the Ypipe.
Extend dual 2.5 inch tubing underneath the car
Use 2 90 degree mandrel bent 2.5 inch pieces of tubing and exit the exhaust right in front of the rear tires.
If necessary for ground clearance use oval 2.5 inch tubing with chromed tips.
What do you think? That should quiet the exhaust a lot underneath the car and get rid of the droning etc. I am not currently planning on a Hpipe or an X pipe at this time. (I am probably going to lose a little low end but not too much where the tubing is only 2.5 inch.) What do you think? I dont care if it is loud to cars next to me as long as it isnt too loud in the car haha!
Thanks,
Chris

JS

iTrader: (4)

Chris this is IMO the best way to go...
Macs w/Modded ORY to a cutout (Only opened for racing) then 3in over the axle to (1) 3in Dynomax Bullet Race Magnum and (1) 3in tail pipe exiting on the driver side

Yes its alittle loud but its <img src="graemlins/fluffy.gif" border="0" alt="[Fluffy]" /> as hell and flows EXCELLENT...


This is how my car is setup now.
Once I go to the Dynatechs or Hookers I'll have a 3in ORY added to the mix.Other than that it'll remain the same.

JS

Pro Stock John

iTrader: (34)

I think that's going to be loud since the tips will exit a little behind the doors.

Visceral

iTrader: (1)

Seen/Heard it with an LT1 car. Was loud, but not crazy stupid loud. But what it did that sucked was removed all semblance of ground clearance. For some reason the things you have to go under after the 90 deg. made it a huge mess. Worked well for racing only though.

chris

CHRISPY

Strange,
I looked under the car last night and didnt see any visible obstructions. My car is a formula so I dont have to worry about the lower body mouldings etc. Also my two bullet 2.5 inch mufflers are tucked up nicely out of the way in the front part of the Ypipe. I can also use oval tubing too if it proves to be a clearance issue. I am also not afraid to use a BFG for extra clearance either <img src="gr_images/icons/wink.gif" border="0">

I just want to get rid of the resonance under the car, the car is pretty much street/strip but I am not concerned so much with the noise issue. If this works well I am going to do it with the cat Ypipe I have too.
thanks again,
Chris

[ January 02, 2002: Message edited by: Chris ARE 360 ]</p>

CHRISPY

That is true but I think I can design it to be far enough out of the way of the tires. The Saleens and Vipers had this setup without issue so I think I will be ok.
Chris

Pro Stock John

iTrader: (34)

I have heard exhaust like this and it sounds louder than dumps on a 5.0 stang.

bigSS

I think that would be pretty badass, I haven't seen side pipes on an LS1 yet! Be sure to post pics if you get it done.

Flash Gordon

I just installed MAC headers and y-pipe. I welded two bullets in the y-pipe and screwed them up (bullets hit the floor pans). Right know i'm running 10" off the headers w/ bullets with turndowns right under the front seats until I get another y-pipe in. It is VERY LOUD, so loud it shakes my car. It's almost as loud as open headers. On a 1 to 10 scale, 10 being open headers I give my current setup a 8.5. Just make sure you have enough clearance space and not to make a $220 mistake like me!

CHRISPY

yep
Mine is running without a catback at all now just the Ypipe with 2.5 inch bullets and it is damn loud under the car. Thing is though if it were redirecting the sound out from under the car to the sides it would be much quieter in the passenger area but loud on either side. (Which is fine by me <img src="gr_stretch.gif" border="0">
The resonation with the exhaust dumping under the car is bad news.
Chris

Patrick G

iTrader: (14)

Chris,

The bullets do very little in quieting down the exhaust. If you really want to make an impact on noise reduction while still flowing like a ****, you may want to consider the small Borla XR-1 mufflers instead of the bullets. They're low profile and just slightly bigger than cats. They would sound a lot better than bullets. Of course they cost over $100 each vs. $39 each for the bullets. In this case, you get what you pay for.

Patrick

LS194z

You could also try the race magnum round mufflers, they are alittle larger then the bullets and quiet it down more. I am going to run these when I get around to it.

[ January 02, 2002: Message edited by: LS194z ]</p>

Bout'ItZ28

iTrader: (19)

thats exactly what i have copy cat <img src="gr_tounge.gif" border="0">

btw it looks good (attention getter also) but i use the stock z28 tips in front of the tires. its a little loud but that may have a little something to do w/ the cam and no programming. but all in all i like it

[ January 02, 2002: Message edited by: Bout'ItZ28 ]</p>

Keith98SS

The only issue is safety when you exit the exhaust right in front of the wheels. If for some reason, you grenade your engine, you stand the possibility of dumping oil right in front of your tires. Needless to say, that would be a very bad thing from a handling standpoint, especially given the concrete walls lining your pathway.