The Triumph Dolomite Club - Discussion Forum

leslieb wrote: ↑Fri Jul 19, 2019 1:13 pm Hi this may be a silly question but I'll have to ask.
I have a 1972 1850 dolomite non overdrive fitted with a sport exhaust that was fitted when i bought the car at 50 mph 3000rpm the car gets very loud inside, Ive had a new timing chain fitted so at tick over the car is quiet should i take the sport exhaust off and fit a standard one?

matt of the vivas wrote: ↑Fri Jul 19, 2019 1:25 pm Stainless exhausts can resonate a bit. Ive had success with clamping metal weights to the exhaust near the centre silencer. A kg or 2 is enough. I used a large scrap wheelbearing off a modern car welded to an exhaust clamp. It just adds enough mass to cut out most of the resonance.

cleverusername wrote: ↑Fri Jul 19, 2019 4:58 pm

leslieb wrote: ↑Fri Jul 19, 2019 1:13 pm Hi this may be a silly question but I'll have to ask.
I have a 1972 1850 dolomite non overdrive fitted with a sport exhaust that was fitted when i bought the car at 50 mph 3000rpm the car gets very loud inside, Ive had a new timing chain fitted so at tick over the car is quiet should i take the sport exhaust off and fit a standard one?

Then how would you cover up the wind noise?

How much of the sound deadening that was originally fitted to the car is still there? If it is gone, reinstating it might make a difference.

cleverusername wrote: ↑Fri Jul 19, 2019 4:58 pm
Then how would you cover up the wind noise?

How much of the sound deadening that was originally fitted to the car is still there? If it is gone, reinstating it might make a difference.

Bumpa wrote: ↑Fri Jul 19, 2019 7:29 pm

cleverusername wrote: ↑Fri Jul 19, 2019 4:58 pm
Then how would you cover up the wind noise?

How much of the sound deadening that was originally fitted to the car is still there? If it is gone, reinstating it might make a difference.

Certainly on my 1977 1850, the largest amount of noise at 60-70 mph is wind roar. But then I have overdrive and the later very complicated (and restrictive) exhaust system. The bulkhead in the engine bay should have sound deadening material glued to it. I don't know what would have been under the carpets as standard. I have actually removed some of the material on the driver's side of my bulkhead because I had to do some repairs there. I can't say the car is any noisier as a result. But compared with almost any modern car it is noisy inside.

cleverusername wrote: There should be deadening material on the transmission tunnel, the footwells have some sort of bitchumen material glued to them, I also found some bags of sound deadening material in my doors when I took them apart (don't know if that was standard).

One thing that would make a difference is putting deadening material underneath the bonnet, most modern cars have it, just make sure it is fire proof.