MG Midget Madness (i.e. It was either this or kill it with fire)

GySgtFrank · 06-20-2015, 08:51 AM

Finished the mid pipe section and got paint on it. I will probably need to make up some heat shields for the pipes. They have to run pretty close to the floor pan as there is very little ground clearance on these and nowhere to tuck the pipe up and out of the way. I still have about 1/2" of clearance, but didn't dare tuck it up any higher due to the rotary's high exhaust temperatures.

mid pipe 1 by Kevin Frank, on Flickr

The end of this will connect to an X pipe section that passes underneath the transmission. It will bolt to the exhaust on either side of the tunnel opening. This will give me a section that I can drop out to remove the transmission, without having to take out the entire exhaust system each time. The downside to this approach is that there are more gasketed joints (and possible leak points) in the system. Once out of the X pipe section, I plan to 90 the dual pipes toward the rear of the car (putting in another flange just before it turns up to go over the axle) and all the way over the axle before I run it into a 3" collector at the back of the axle tunnel. At that point it will go to a 3" Racing Beat pre-silencer, make a 90 into a 3" RB muffler, then make another 90 out the back on the passenger side. The reason for this is more so space considerations than for the long primary. Space is so tight over the axle that the 2" pipe is going to be a tight squeeze, anything bigger would be sure to hit on suspension compression. That's the plan anyway.

mid pipe 2 by Kevin Frank, on Flickr

and a shot of where it connects to the upper section of the header/manifold.

mid pipe 3 by Kevin Frank, on Flickr

Probably not going to get a lot done for a couple more weeks as I have to make a trip up to Montana.

06-20-2015, 08:51 AM	#10
GySgtFrank Professional Stick Poker Join Date: Feb 2011 Location: Stafford, Ks. Posts: 1,012 Rep Power: 16	Finished the mid pipe section and got paint on it. I will probably need to make up some heat shields for the pipes. They have to run pretty close to the floor pan as there is very little ground clearance on these and nowhere to tuck the pipe up and out of the way. I still have about 1/2" of clearance, but didn't dare tuck it up any higher due to the rotary's high exhaust temperatures. mid pipe 1 by Kevin Frank, on Flickr The end of this will connect to an X pipe section that passes underneath the transmission. It will bolt to the exhaust on either side of the tunnel opening. This will give me a section that I can drop out to remove the transmission, without having to take out the entire exhaust system each time. The downside to this approach is that there are more gasketed joints (and possible leak points) in the system. Once out of the X pipe section, I plan to 90 the dual pipes toward the rear of the car (putting in another flange just before it turns up to go over the axle) and all the way over the axle before I run it into a 3" collector at the back of the axle tunnel. At that point it will go to a 3" Racing Beat pre-silencer, make a 90 into a 3" RB muffler, then make another 90 out the back on the passenger side. The reason for this is more so space considerations than for the long primary. Space is so tight over the axle that the 2" pipe is going to be a tight squeeze, anything bigger would be sure to hit on suspension compression. That's the plan anyway. mid pipe 2 by Kevin Frank, on Flickr and a shot of where it connects to the upper section of the header/manifold. mid pipe 3 by Kevin Frank, on Flickr Probably not going to get a lot done for a couple more weeks as I have to make a trip up to Montana. __________________ 1988 N/A SE 2+2, dead stock and staying that way. 1979 SA22C stock? Not so much. http://rotarycarclub.com/rotary_foru...ad.php?t=15585 Last edited by GySgtFrank; 06-20-2015 at 09:04 AM.