82streetracer

iTrader: (1)

Heres the deal. A few months ago I got my rear N1 muffler welded up. I have road race headers and a streetport center section.

The muffler hit the axle a little so they had to redo it. I have since added lowering springs and its hitting again, and the springs havent even settled totally.

The exhaust guy says I cant run TWO pipes over the axle any higher than I already have them. (longest possible primarys)

So what about runnign them under the axle.
The pipe would be considerably straiter and it would put the muffler at a much better angle. (right now its pointing down, which is not really the style with these kinds of mufflers)

The shop also Built their own colloctor and it looks restrictive *** hell (despite my car shooting flames all the time) and I would like to put a better collector on there.

rx7gslse

would it work? yeah probably...

would you probably end up removing it, or at least damaging it on something? yeah probably....

damon

road debris? bumps?sharp turns?

I personally woulnt spend all that money on someting to destroy. Cant they run side by side above the axle? Or even run them out the sides.

peace

82streetracer

iTrader: (1)

side by side over the axle is what I have now and it isnt working.

out the side would be loud as **** and would burn the side of the car, it would look sick though

Speed bumps and such dont matter because the bend would be inside the radius of the tires.

If I had it within a inch of the axle I think it would work OK, it might hit the axle on in some extreme cases but that would be much less than it hitting it now.

mperformance

under should not be a problem if you don't make sharp turns...

Rotortuner

I run it under the axle on my rx3, and i dont have any problems. My car has very large lowering blocks though. You just dont want the axle to come down and hit it so make sure that cant happen. I dont have any problems with tight turns, what are you guys talking about tight turns?

CJG

j9fd3s

iTrader: (3)

on the pro7 (spec7, it) car they all run under the axle, the bend over the axle is worth about 5-10hp.
i dunno about running it on the street it might hang down too low

mike

RotorMotorDriver

iTrader: (1)

I was thinking about going under the axle myself due to the fact that the muffler I was looking at was too long to fit to run it over the axle...

~T.J.

PS - Really? Why hasnt anyone else done this yet then? Like RB?

Maguire

iTrader: (1)

heeh, run dual pipes off the side. you'de look a zz-top and ****!

REVHED

You'd have to rig something up to hold the axle if you jack the rear end up. Chains maybe?

82streetracer

iTrader: (1)

yeh, I was thinking of some kind of wire. I wouldnt use chains, too heavy and lowriderish.

5-10 hp for smoothing out a few bends seams unrealistic

1st7heaven

I know that this has been experimented with on a dyno and the bend did not effect the hp on their set up. Maybe someone else had a diff. result?? I have done a 3" over the axle and the car was very very low!! We bent the pipe as much as possible, the rest had to be welded at angles.......had no problems.

WackyRotary

Seems like a bad idea since heat will be absorbed into the axle and the brake line going to the rear right wheel. Also, I don't know how low you have the rear of the car, but the stock muffler pipe should easily clear
the axle. IS your pipe really large or something? You DON'T need to go any larger then 2-1/2 pipe with a 12a. Just use the stock muffler pipe and wield on that
N1 Fart pipe you got to it after the axle? Can't you do that?

10sec rx7

Both AJC-13B and Myself run under axle pipes on our cars, never had a problem with it,

mperformance

hummm 5-10 hps???

another cheap mod I read?

are you sure it won't hit the axle or the floor? your cars are 1/4 mile cars though.

sounds like something worth doing but under the axle will leave you no place to put a muffler unless the pipe bends upwards again to put a muffler in the stock location. Now if running an open exhaust that should not be a problem, but then why even run it all the way back?

82streetracer

iTrader: (1)

Wacky, i have dual 2in all the way to the n1 muffler in the back.

This setup will be attached to a blown 13b 4 port so I dont think Im runnign to big. I am going to run them under the axle. As for the brake lines, that is a good point, just for safety I think Ill wrap that section in DEI wrap.

10 sec, how close is the top of the pipe to the bottom of the axle?

82streetracer

iTrader: (1)

with a n1 routing it underneith would make it easier.

rx7gslse

nah, just have the N1 stick further out the back like the VW guys do....

Viperx7

iTrader: (4)

We just did mine with 3" under the axle. Don't really know the pros vs cons of it though. My partner had it on his and said he had no problems. The only time that he drug was the muffler would scrape if he had to go someplace steep.

85ported12a

i've had this one on for about 2 1/2 years.its real loud now

peejay

I have run pipes under the axle before. It is NOT pretty. You either have the pipes dragging on the ground, or you need to limit your suspension so that there is zero droop travel, in which case the pipes only scrape most of the time.

Solution? Unlower the car, or run a different exhaust.

onepointone

2" dual all the way back to a single n1 muffler? not sure if this is what you want.. but why not just run both of them into one 2 1/4 or 2 1/2" pipe before the axle, then over the axle since its going into one muffler anyways?

RotorMotorDriver

iTrader: (1)

Mount the N1 sideways, and then cover up the exhaust opening on the bumper so it gives it that "stealth" look .

~T.J.

82streetracer

iTrader: (1)

no way is that happening. the muffler is at least 5 inches wide. even if it would fit under there. I would have less than a inch of ground clearance.

When I bring it to a muffler shop, ill make sure there is very little gas so that way they could bend it with the ride hieght at its highest point.

RotorMotorDriver

iTrader: (1)

On another note...Anyone know what the difference is between the 83 and 84 connecting pipe and muffler assembly is? I want to put a "universal" muffler on my car myself (since I cant afford the RB one to match the rest of my exhaust yet), and I need to do some cutting and custom fabricating to make it fit (as we all know). The question I have is this...Can I take the connecting pipe/muffler out of my 84 parts car, and retro fit in to the 83 to cut? That way I can preserve the "real" setup for my 83. That way, when the funds come in, I can just unbolt the setup I "made" to bolt on the RB muffler. No need for more cutting and fabbing that way. I havent been under the cars to see what the differences are, so if anyone knows, id like to hear it. Do they just mount in different spots or what?

~T.J.

PS - Anyone know how safe it is to do welding while the pieces are ON the car? Is that how exhaust shops do it? Im just worried about the gas tank cause its like RIGHT there...