HAB832C Posted April 3, 2009 Report Share Posted April 3, 2009 After 34 years, HAB832C is back on the road after a rebuild but I am disappointed with the exhaust note of my new stainless two pipe set up from Moss. Any product recommendations to get back the sound I remember? Many thanks. Quote Link to post Share on other sites
TR 2100 Posted April 3, 2009 Report Share Posted April 3, 2009 After 34 years, HAB832C is back on the road after a rebuild but I am disappointed with the exhaust note of my new stainless two pipe set up from Moss. Too loud? Or too quiet? Or no resoance at 2800-3000rpm? Great that you're back on the road after all these years, though, whatever the sound. AlanR Quote Link to post Share on other sites
Don Elliott Posted April 4, 2009 Report Share Posted April 4, 2009 In 1988, I bought a new Falcon stainless steel exhaust system (complete) from Cox & Buckles for my 1958 TR3A. It was slightly quieter than what I could remember during the 16 years it was parked in the corner of my garage. But it was close. I have since done 100,000 miles and last summer the main (front) silencer split lenthwise all the way down the center of the top. I took it out and my neighbour TIG welded it back together but it has such a resonance between 2900 and 3000 RPM, that I hate to go through that range. Maybe something has come loose inside ??? Quote Link to post Share on other sites
Don Elliott Posted April 4, 2009 Report Share Posted April 4, 2009 Speaking of rich brown fruity nuts reminded me of my friend John in Maryland who owns a TR3A. Last spring, he took it out of his barn where he had stored it for the winter and started it up, then went into the house to finish his coffee. He looked outside and what did he see ? Look at the photo. He couldn't believe his eyes. He had all kinds of horrible thoughts of blown head gaskets, blown engine, etc. NO ! It was the fruity nutty smell that told him what the "problem" was. During the winter, squirrels had filled the exhaust pipe with walnuts and now they were being roasted. Now you know the rest of the story. Quote Link to post Share on other sites
TR 2100 Posted April 4, 2009 Report Share Posted April 4, 2009 it has such a resonance between 2900 and 3000 RPM, that I hate to go through that range. Maybe something has come loose inside ??? Hi Don, If there's no resonance at 2800-3000, it's not a TR! Love the story and picture of roasting nuts. AlanR Quote Link to post Share on other sites
stuart Posted April 4, 2009 Report Share Posted April 4, 2009 Unfortunately the resonance is a by product of the stainless systems. Some resonate more than others depending on the quality of the build and the grade of stainless used. They do sometimes quieten down a bit after a while and careful fitting can make a difference as well. The only true way to reproduce the original TR roar is to fit a standard steel system. Only problem is they are now more difficult to find and in some cases more expensive than stainless Stuart. Quote Link to post Share on other sites
Nick Webster Posted April 4, 2009 Report Share Posted April 4, 2009 I have found that some change in tone can be attributed to the chrome finisher that is fitted to take the exhaust clear of the back of the car. It seems impossible now to buy these things without a turned over shaped end. I think it is some safety measure that stops people slicing their ankles on the sharp pipe. (What would you be doing, so close up to a TR exhaust?) Anyway, the one that I have is turned inwards, effectively reducing the diameter. This slight reduction is not particularly an issue but definitely causes the exhaust to make a "waffle" noise something akin to a silencer blow. I have tried the car with and without extention and now I'm keeping my eye out for a completely parallel finisher. Nick Quote Link to post Share on other sites
Badfrog Posted April 4, 2009 Report Share Posted April 4, 2009 From my experience, only the original mild steel single exhaust gives the right "TR" note, whether the driver is a fruit or a nut. The Phoenix single big bore (2") with a single silencer comes close. I am quite happy with it as far as the "gel attention grabber effect" is concerned. Cheers, Badfrog Quote Link to post Share on other sites
TR 2100 Posted April 4, 2009 Report Share Posted April 4, 2009 (edited) The only true way to reproduce the original TR roar is to fit a standard steel system. Only problem is they are now more difficult to find and in some cases more expensive than stainless Stuart. I still have an old (30 years) unused mild steel system - I was going to bin it as I've used stainless for years - maybe I should eBay it ?! Not sure if it has a Stanpart sticker on it!! AlanR Edited April 4, 2009 by TR 2100 Quote Link to post Share on other sites
HAB832C Posted April 4, 2009 Author Report Share Posted April 4, 2009 "gel attention grabber effect" is concerned" It's hard to put sounds into words but, yes, that's what I'm looking for! ..... although at the age of 63, I can''t remember why! <joke> The loudness is fine, it's just the silencers are a bit harsh or raw. I'm looking for a rich fruity nut brown gel attention grabber! Steel might be the way to go. I think it was fitted circa '69 with PECO silencers that my Pa sourced. Thanks for all your replies. Best wishes, HAB832C Quote Link to post Share on other sites
Badfrog Posted April 6, 2009 Report Share Posted April 6, 2009 (edited) "gel attention grabber effect" is concerned" It's hard to put sounds into words but, yes, that's what I'm looking for! ..... although at the age of 63, I can''t remember why! <joke> Well, you know what they say: "so much money for Viagra research and aesthetic surgery, so few on neurodegenerative diseases" ..... In the end we'll all be generously endowed with huge organs, but with absolutely no idea about what they 're meant for. Badfrog, your friendly basic scientist. Edited April 6, 2009 by Badfrog Quote Link to post Share on other sites
Don Elliott Posted April 6, 2009 Report Share Posted April 6, 2009 Alan - Glad you liked the story. The silencer on my 1958 TR3A always had a resonance at 2900 - 3000 RPM, but if you heard how loud it is now, you would understand what I mean. It's so loud now, I'm sure you would be able to hear me a half mile away. All I want to do is get it back to the sound level it had before. Anybody any ideas ? Anyone tried this before ? I have thought of strapping very long hose-clamps around it in two or three places along its 24" length. Maybe clamping some sort of absorbent material between the outer shell surface and the clamps ? leather ? other ? Quote Link to post Share on other sites
BrianC Posted April 6, 2009 Report Share Posted April 6, 2009 (edited) Don, I have the same Falcon system as you, from the same source and era. I have both front and rear silencers fitted, with a mild steel SAH manifold and have a perfectly acceptable noise level, with or without a tailpipe finisher (although beauty is in the ear of the listener ). However, my exhaust has done considerably fewer miles than yours, due to the car's many years off-road hibernation, so your problem is possibly due to the internals rather than the outer casings. I have fitted stainless systems to many of my cars in the past and it was pointed out to me many years ago by a couple of exhaust suppliers that stainless steel exhausts are expected to last for ever. Even though some are allegedly 'guaranteed for life' (normally not more than 10 years on most cars), whilst they may appear outwardly perfect, the insides may be completely shot. Edited April 6, 2009 by BrianC Quote Link to post Share on other sites
stuart Posted April 6, 2009 Report Share Posted April 6, 2009 Alan - Glad you liked the story. The silencer on my 1958 TR3A always had a resonance at 2900 - 3000 RPM, but if you heard how loud it is now, you would understand what I mean. It's so loud now, I'm sure you would be able to hear me a half mile away. All I want to do is get it back to the sound level it had before. Anybody any ideas ? Anyone tried this before ? I have thought of strapping very long hose-clamps around it in two or three places along its 24" length. Maybe clamping some sort of absorbent material between the outer shell surface and the clamps ? leather ? other ? Sometimes a few dints with a ball pane hammer will stop resonance. Similar to swages in large panels. Obviously they would need to be somewhere unseen like on top of the silencer on yours Don. Stuart. Quote Link to post Share on other sites
Don Elliott Posted April 6, 2009 Report Share Posted April 6, 2009 Thanks Brian and Stuart. You've given me some ideas. By mid-summer, I might have something to report. Last year when I took out the muffler and the resonator, it took me about 30 minutes to do. All my nuts and bolts are stainless steel. Isn't stainless steel nice ? Quote Link to post Share on other sites
Alec Pringle Posted April 7, 2009 Report Share Posted April 7, 2009 Stainless steel resonates more easily than mild, if only because it's thinner - awful stuff, but it is rot resistant. Our local fabricator has a good sideline in stopping resonance in stainless systems. One technique is a bead of stainless welding wire along the top (unseen) surface of the pipe - which has to be uneven thickness and less than straight. The same can be done along and/or across the top surface of a silencer box. Another technique is swaging out slightly the female pipe end, and using a very thin piece of lead as filler between the male and female pipe ends - heat a strip of lead, then flatten it in the vice to make it thinner. Or whack it with the big sledge. Yet another technique is a thin strip of lead, made in the same way, and circle the pipe or even silencer with a jubilee clip clamping the lead circle to stainless steel. The lead you can buy from a builders merchant as roofing lead, or the local scrapyard will yield scrap lead offcuts at half the price. Easy, cheap solutions which alter the sound of an exhaust dramatically. When I say easy and cheap, I mean if you go down on Saturday morning with a TR or MG and give the man a hand, it's twenty five quid in folding. If it's an Aston or a Healey you leave it with him for a day in the week and it's £100+. Parallel sided chrome finishers I think you can still obtain from Bosal - but the local exhaust shop will probably have to order them for next day delivery. Cheers, Alec Quote Link to post Share on other sites
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