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Triumph TR6 - Exhaust Fumes

Hello,

I have a problem with exhaust fumes in my 6. Wheather the top is up or down, the fumes are terrible. I had the entire exhaust welded in hopes of fixing the problem, no luck. Has anyone else had an exhaust problem? And if so, how did you correct the issue? Thanks in advance.

Derek
DL Harding

It has to do with the length of the rear pipes. Sound s like a non stock exhaust
DON KELLY

Hi Derek, I have the very same problem. I was silly enough to put on a Monza exhaust a few years ago and the fumes just about take the eyes out of your head on the highway. Around town is OK. If you have a system where the exhaust tips are turned up like the Monza, that is the problem. Nothing to do but change it. I just don't know what I want yet.

Rob
rw loftus

Derek

I can detect exhaust fumes as well in mine although not as bad as yours sounds. I installed a TRF SS exhaust system. It has been on my mind to do something about it like install extenders on the pipes like Don suggests but I haven't made it a priority.
Michael Petryschuk

If you buy a system engineered for a TR6 from a reputable company it's beyond me why one should have to install extenders....the system should be made "right" from the get-go. I'd call them if the system doesn't meet to your satisfaction...if anything so they can correct it in the future or they can talk to their supplier.
JT White

I installed an Ansa exhaust on the car. I have moved the pipes forward and backwards trying to fix the problem. Then had every joint welded up. If there is a system that does not have an exhaust fume issue, I'll install it. Any recommendations? Thanks,

Derek
DL Harding

My system seems to be as per original spec. The exhaust fumes for me only come up when driving due to eddy currents created by the car aerodynamics. I don't think the source is from the joints just from the outlet pipe. Depending upon how the car's eddy currents are, you should be able to move the outlet to reduce fumes from getting caught in the eddy currents however it may require extenders that don't look good.

You can try to change the airflow around the car. - Not sure of what to try but throw the idea out as a concept.

Michael Petryschuk

Michael, you are right. It is definitly an areodynamic problem. It seems that any exhaust that swoops up behind the bumper has this problem. But I think it is worse if the exhaust tips are closer to the centre as opposed to the outside. Maybe Triumph knew this and had the exhaust made to avoid this problem. I got into my Civic the other day after wiping snow off of the windows but not the roof. As I drove down the road, I cold see in the rear view the snow on the roof swirling around the back of the rear window and landing in the middle of the rear window. I'm assuming that is what is happening with our nonstock exhaust systems. It could also be coming up from under the car. Either way, there is always a low pressure zone behind the car that has to filled with something. If the exhaust is there, that is what it will be. Sorry for rambling, but this problem has been a real issue for me. I hate the idea of having to replace a system that is still sound.

Rob
rw loftus

Hold on...my 74 has a fab'd exhaust with four glass packs under the boot and the pipes are 14" apart between the over-riders and they angle upwards and there is no exhaust fumes in my car, top up, top down, rear window unzipped etc. They are "close together" and "swooped up" behind the bumper. No problem since I've had the car for about 1 1/2 years now.
JT White

JT,

Does your exhaust extend past the bumper? Do you have any photos?

Derek
DL Harding

I'm at work now but I'll try to put a pic up this weekend.
JT White

Here's a picture....hopefully

JT White

Ok, JT, I don't know what to think then. All I know is that everyone who has ever commented about the Monza exhaust is that they are really loud and have an exhaust odour issue. Hmmm?

Rob
rw loftus

Hi All:
I am running stock Falcon stainless from Moss with two outlets on the left - strictly the stock setup and have no fumes city or highway. I ordered a Monza dual system last week and cancelled (on advice from this forum)just before shipping in favor of the Falcon Sport Stainless dual freeflow system. I have not heard any negative reports on this system and it looks essentially like JT's pic. It is virtually identical to the stock dual system that came on my old TR4A and I don't recall any fumes problems with that either.

Cheers,
Bob
Bob Evans

Mine is kind of loud...in a nice British sports car kind of way....keeps the radio off as the sound of that exhaust is "music" to my ears!
JT White

Just an update, I replaced the Ansa exhaust system with a system from Rimmer Brothers, no more exhaust fumes!!!!
DL Harding

This post is completely NO GOOD with out PICTURES!!
DON KELLY

Don,

I will get some pictures posted this week


Derek
DL Harding

Don,

Here is a picture of the new exhaust system. I will say the single exhaust works alot better than the dual Ansa exhaust.

DL Harding

Derek- 2 piece manifold or 1?
DON KELLY

Don,

2 piece manifold. If I had to do it over again, I would just use the stock exhaust manifold.


Derek
DL Harding

This thread was discussed between 01/03/2011 and 07/06/2011

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