No Exhaust Driving
 

I want to take my car down to mazsport which is about an hour and a half away to get a racing beat exhaust installed, but I do not want to have to lug the old system back. I doubt it would fit in the trunk anyways and I do want to hold on to it just in case. If it was old I would just dump it but it only has 4000 miles on it. I am thinking of removing the stock catback at my house then driving the car down to largo. What I would like to know is how the sound is because I dont want to get pulled over on my way there and will any damage be done to the car? Thanks in advance.

Sound is your worry? i wouldn't want the exhaust heat blowing on the underside of my vehicle. You're talking 1600-1800 F just cruising around on the highway.

No Problem

Put it in the trunk, tips first and let the pipe hang out. Tie down the trunk lid. Then put a red flag on the pipe that is sticking out.

Good point I hadnt thought of that.

Call Mazsport and ask them if they'd take it as a trade in if you don't want to keep it. Otherwise bring some trash bags, wrap up the exhaust, and throw it into your backseat. Pretty sure it'll fit. Plus it'll make you feel superior to any 350Zs you see on the highway on your way home...

i would say it's probably cheaper just to ship the exhaust and find someone local to install it for u, gas and everything.

Tailpipe will fit through the trunk pass through. Just wont be able to close the trunk. And the tips will hang out about 6-10 inches.
You could go to a muffler shop and have them make a small turn out pipe. Come out under the passenger door.

I should be able to make it there and back on one tank of gas. I figure if Mazsport does the install they will give me a better price than a muffler shop because I am buying it from them. I also prefer them to do it because they know what there doing, so the chances of anything going wrong is pretty low.

cat back exhaust is pretty easy to install unless it needs to be welded.

otherwise you can go to a muffler shop and get a flange and an exhaust tip welded to point downwards at the road. (might cost $20) So you bolt that up to the header/mid pipe or whatever and away you go... loud yes... worry about exhaust heat on your underside... not so much.

Why dont you install it yourself at home? If you have the tools to pull the stock I think you can install it yourself :eyetwitch

easier to put the new one on than take the old one off...

+1... that's what I was thinking.

Exhaust isn't that difficult of an install...a few bolts and a couple hangers and whamo it's off.

I've heard RX8's with no exhaust...loud as hell!

stock exhaust fits into the car thru the passthru, can in the back seat:

http://ilp303.com/albums/rbexhaustin...car1.sized.jpg
http://ilp303.com/albums/rbexhaustin...car2.sized.jpg

Though I would not recommend this. I recommend sawing off the intermediate pipe (where that pipe joint is), it'll make it easier to take out the stock exhaust and you won't have to pop out the plastic exhaust shrouds. It'll also make it easier to package it in your trunk if you wish to keep it.

I gave my stock exhaust w/ 5K away for free. If you ever want to go back to stock, just find someone w/ a stock exhaust who wants yours, swap and you're good to go.

Minor bump but I had my new exhaust installed at The RX7Store in Columbus today. They didn't think I could do it (they are used to 7s after all) but since we couldn't budge the pipe I was actaully able to get the exhaust in my back seat w/o a problem and without using the passthrough:

https://www.rx8club.com/attachment.p...1&d=1215118619

Just one small scratch that will come out on the rear center console where the pipe connects to the muffler. You have to slide the passenger seat all the way up then lie it down. Slide the driver side all the way up and tilt it forward, then you put the exhaust in through the passenger side - exhaust tips first. The end of the pipe sits comfortably at the foot of the passenger chair. I thought it would rub up against the dashboard but it didn't go near that far.

You can slide back the driver side and sit in it as normal when hauling it back.

Its a non issue. The gasses coming out are not that hot. The only downside is the black sut it will leave, but no...you wont melt the metal floor, or even hurt the paint on the underside.

On a rotary they are absolutely that hot.

1,600-1,800 F is typical. You can even reach 2,000 F. This is exhaust gas measured (EGT) measured approx where the cat is located. If he has no exhaust installed, that IS the temps he'd be subjecting the underside of the vehicle to.

I suggest you try it out and let us know the results :)

With out the catback on, the car may run even leaner, this would make the exhaust even hotter than normal.

Just install the new one yourself. If you can take the old one off you can put the new one on. Save some money and a trip.

yeah put it on urself is the best if ur already goin through the hastle of takin the old off y not jsut bolt up the new one too but if you do go down i would try to put it in the back afte rthe new is installed it should fit as u can see but without any exhaust comin straight out of the cat this this is pretty loud but the heat would b my worry

sounds to me like he has to pick up the rb exhaust from Mazsport anyways.

I tried it already on a Cadillac Fleetwood (not becaue I thought it would be cool by any stretch) had to remove for air ride, and put some miles on it without exahast, and on a 70 charger 472 hemi, buick GN, and a 70 road runner w/499 stroker. Never so much as a bubble in the fresh paint on the floors, within inches of them. The gasses cool VERY quicky as they exit, hence the reason we dont have 1500 degree head coming from the tail pipes.

look for fairly recent posts by Kane...

he's a friend local to me. he is running MM's 3071 Greddy uprade turbo. he has a blanket on the turbo and is STILL melting carpet in the passenger foot well.... and he doesnt have any exhaust leak or anything... thats just radiant heat off the turbo/exhaust.....


rotaries EGTs are significantly higher than reciprocating engines

taken from here: http://www.nolm.org/rotary_engines.html

i havent analyzed the statements to check for false info, i'm sure someone more knowledgable than me will though ;)


really, the extreme energies(heat, flow, sound) in the rotary exhaust is exactly why they respond to well to turbocharging :)

the cats are usually the major heat source, an open exhaust isnt going to generate as much heat. If the exhaust coming out underneath the floor was 1800 degrees, the rotor housings would be 2400 degrees.....metal doesnt hold up for long at 1800 degrees.