Exhaust db killer

[johny]

yes the mk1 Vitesse originally had an inline can while later they dropped that and, I think, increased the size of the back box. Careful with the 3.5" diameter as I reckon that'll be quite tight to the chassis rails... 

[Iain T]

20 minutes ago, johny said:

Careful with the 3.5" diameter

Very true plus it is even more joints to leak! I've persevering with the Dodo Mat. 

Iain 

[johny]

yes leaks always a problem but you can get a 3" diameter Cherry Bomb in various lengths from about 30 quid. Not stainless but should last pretty well on our cars...

[Pete Lewis]

the advantage of a 3.5dia is you can clean the valves from the tailpipe 

pete

[cliff.b]

Decided to try a couple of these on my Spitfire as the  non standard, two tailpipe exhaust is annoying me on longer journeys. Bought the cheapest I could find at £7.95 the pair 😊

 

Initially fitted with the back pressure adjuster in place and definitely quieter, but maybe too quiet. No edge to the exhaust note but didn't seem to affect performance though.

Then removed the plug and the deeper noises were reduced, but nice higher "raspy" noises were back when revving hard or down changing. Also, I was surprised that mid range pull seemed stronger as well, still pulling well when I changed up at 5500. Could that be something to do with increased back pressure 🤔

I will need to test further lol

[Graham C]

Just admit I have twin exhausts on GT 6 like the look and sound. However on long journeys very painful so would be interested in making them quieter.

Is it a simple ebay search?

Or do people have recommendations.

Graham

[cliff.b]

I searched eBay for "Exhaust DB killer" and a variety of similar products in various sizes appeared. Some were more expensive than others but impossible to know if they are any better. 

[Colin Lindsay]

On the subject of exhausts (and just to divert slightly - apologies to the OP) anyone familiar with the SNIP tailpipe extensions? I think these were to create an airflow and so remove exhaust gases more quickly but have never had that confirmed. Any ideas?

  

 

[cliff.b]

4 hours ago, Colin Lindsay said:

On the subject of exhausts (and just to divert slightly - apologies to the OP) anyone familiar with the SNIP tailpipe extensions? I think these were to create an airflow and so remove exhaust gases more quickly but have never had that confirmed. Any ideas?

  

 

Hmm, interestingly the rear box I have fitted has 2 outlets at either end and both are about 30mm dia but have a length of 50mm pipe spot welded on to their ends, allowing an airflow gap between the pipes. I was assuming this was for a similar reason and understand the thinking behind it but would that be beneficial to performance, even if it worked?

I have now blocked the forward facing aperture with steel wool and fitted the dB killer in the rearward facing aperture.