Quiet exhaust needed
Discussion
This is a genuine enquiry so please don't post your louder is better comments..... fat chance of that I suspect though 
Has anyone had experience of a quieter exhaust for the S? I need something for some touring later in the year and can't face 90db+ cabin noise for hours at a time and don't want to constantly have to use earplugs. I was thinking of making one from standard off the shelf bits from companies like Jetex etc. Current thinking is to go for a 2 into 1 (2x2" into 1x2.5") then run the largest silencer box I can fit into the space where the old box was then a single pipe back to another smaller box - possibly exiting off centre at the rear. Reason for the off centre bit it to give more ground clearance over the centre ridge in roads.
Any thoughts, pics, comments etc?
cheers
Jed
Has anyone had experience of a quieter exhaust for the S? I need something for some touring later in the year and can't face 90db+ cabin noise for hours at a time and don't want to constantly have to use earplugs. I was thinking of making one from standard off the shelf bits from companies like Jetex etc. Current thinking is to go for a 2 into 1 (2x2" into 1x2.5") then run the largest silencer box I can fit into the space where the old box was then a single pipe back to another smaller box - possibly exiting off centre at the rear. Reason for the off centre bit it to give more ground clearance over the centre ridge in roads.
Any thoughts, pics, comments etc?
cheers
Jed
It's not the tailpipes end that is the real problem - the noise there isn't too bad although does need sorting for track days. The main box resonates a lot and I'm guessing this is partly due to the flat sided sheet steel plus the wadding gets blown out. I've filled it once and that made a difference but over 5k miles it has got worse again.
One thing I've always thought about is that the exhaust is quite rigidly mounted and a lot of the noise I think comes from the fact there is very little supression in the exhaust mounting rubbers.
A project I've earmarked for the future (for the same reason as you) is to install in the downpipes of the system some of those stainless steel braided flexy exhaust pieces (you can get them from burton power)which I think will isolate the resonating that the engine will give through the exhaust system!!
Cheers.....Tony..
A project I've earmarked for the future (for the same reason as you) is to install in the downpipes of the system some of those stainless steel braided flexy exhaust pieces (you can get them from burton power)which I think will isolate the resonating that the engine will give through the exhaust system!!
Cheers.....Tony..
Hi
I had a similar problem on my S1. The noise was deafening - until you reached 80 and then everything calmed down and we had lift off!!
I went to a local specialist exhaust manufacturer, with a view to him making a new one as I thought the rattling was the baffles having come loose. He siad he would open the old stainless one up to see what had happened. He did and found that there were no baffles or silencing of any sort!!! He stuffed it with wading, welded it up and only charged £90. There does not seem to be any drop in performance, but the noise is now a lot more bearable.
I have just wrapped the down pipes as well, which not only reduces the under bonnet temperature considerably, but also helps noise insulation.
Good luck - Have Fun
Dave
I had a similar problem on my S1. The noise was deafening - until you reached 80 and then everything calmed down and we had lift off!!
I went to a local specialist exhaust manufacturer, with a view to him making a new one as I thought the rattling was the baffles having come loose. He siad he would open the old stainless one up to see what had happened. He did and found that there were no baffles or silencing of any sort!!! He stuffed it with wading, welded it up and only charged £90. There does not seem to be any drop in performance, but the noise is now a lot more bearable.
I have just wrapped the down pipes as well, which not only reduces the under bonnet temperature considerably, but also helps noise insulation.
Good luck - Have Fun
Dave
Barkychoc said:
Maybe you should all buy an MX-5 
SWMBO has a MX5 and thinks I should get rid on the S and get a Mk1 MX5 and tune that up. At times I think it isn't a bad thing to do (provided I fit a V6 in it) and it would certainly give me more scope for using off the shelf items like roll hoops etc.There's MX-5's and MX-5's LISTEN TO THIS TURN YOUR SPEAKERS UP NOW!
Barkychoc said:
There's MX-5's and MX-5's LISTEN TO THIS TURN YOUR SPEAKERS UP NOW!
Pathetic...... V8s sound awful. This is what you need in a MX5. http://www.youtube.com/watch?v=jZLnrOeu0KEAt least this keeps the thread alive.
forumOOOOOh dear. I agree, a loud exhaust could be a bit...annoying on long journeys on the motorway. I've always had my standard exhaust and it's been just right for all things, save now I don't think it's loud enough to be a total muppet/hoon/crazy car which TVRs should be anyway. 
But I think I could cope with it on long journeys though I do live on a small Island.
So cut a long story short, I'm getting a sports exhaust, loudest possible!!!
But I think I could cope with it on long journeys though I do live on a small Island.So cut a long story short, I'm getting a sports exhaust, loudest possible!!!
drmaloney said:
Hi
I had a similar problem on my S1. The noise was deafening - until you reached 80 and then everything calmed down and we had lift off!!
I went to a local specialist exhaust manufacturer, with a view to him making a new one as I thought the rattling was the baffles having come loose. He siad he would open the old stainless one up to see what had happened. He did and found that there were no baffles or silencing of any sort!!! He stuffed it with wading, welded it up and only charged £90. There does not seem to be any drop in performance, but the noise is now a lot more bearable.
I have just wrapped the down pipes as well, which not only reduces the under bonnet temperature considerably, but also helps noise insulation.
Good luck - Have Fun
Dave
When you say you wrapped the down pipes, did it really make that much difference? My car is so noisy I have proper ear muffs that I use for the chainsaw and hang them over the handbrake lever when the car is parked (like to think this looks cool) I had a similar problem on my S1. The noise was deafening - until you reached 80 and then everything calmed down and we had lift off!!
I went to a local specialist exhaust manufacturer, with a view to him making a new one as I thought the rattling was the baffles having come loose. He siad he would open the old stainless one up to see what had happened. He did and found that there were no baffles or silencing of any sort!!! He stuffed it with wading, welded it up and only charged £90. There does not seem to be any drop in performance, but the noise is now a lot more bearable.
I have just wrapped the down pipes as well, which not only reduces the under bonnet temperature considerably, but also helps noise insulation.
Good luck - Have Fun
Dave
Edited by The Stiglet on Thursday 13th August 09:24
drmaloney said:
I have just wrapped the down pipes as well, which not only reduces the under bonnet temperature considerably, but also helps noise insulation.
Good luck - Have Fun
Dave
I was going to do mine but after reading on various web sites about fibreglass cars catching fire I decided not to. Apparently, when it is new and put on with 100% coverage (no gaps at all) it is real good. But after a while and certainly if it ever gets wet, small gaps start to appear as the wrap shrinks. Through these small gaps, extreme amounts of heat escape (a lot more than if exhaust wasn't wrapped) and cars have been known to catch fire.Good luck - Have Fun
Dave
Wasn't sure to believe the horror stories but decided against it anyway
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