Exhaust
- herald1360
- Senior Member
- Posts:120
- Joined:Sat Jan 03, 2009 7:54 am
- Location:Exeter Devon
Hi all
I am considering fitting CW single box centre section exhaust on my 2.5, it already has fitted the larger bore CW back box, but standard manifold and down pipe.
Does anyone have experience of one of these ,is performance improved much? Is is any louder? I don't want to be a boy racer! !
Any advice appreciated
Thank you
I am considering fitting CW single box centre section exhaust on my 2.5, it already has fitted the larger bore CW back box, but standard manifold and down pipe.
Does anyone have experience of one of these ,is performance improved much? Is is any louder? I don't want to be a boy racer! !
Any advice appreciated
Thank you
Paul Barlow
Exeter
1974 2500TC French blue
1972 Spitfire MK1V 1500cc Signal red
Exeter
1974 2500TC French blue
1972 Spitfire MK1V 1500cc Signal red
Re: Exhaust
CW supplies a number of exhaust options the largest, or biggest bore, is 2 1/8 inch and can be had without a central silencer piece, and it is noisy, but in a 'positive' sort of way. Other options soften the straight six growl. Not sure if the bigger bore really improves gas flows and therefore performance.
If you need a hand fitting i'm just down the road in Torquay,
cheers,
Laurence
If you need a hand fitting i'm just down the road in Torquay,
cheers,
Laurence
conifer green'68 Mk1, fastroad,rally car
royal blue'68 TR5,an overpriced toy, but still good fun, recently completed CT10'CR
wedgewood '67 Mk1 m o/d,the new addition
royal blue'68 TR5,an overpriced toy, but still good fun, recently completed CT10'CR
wedgewood '67 Mk1 m o/d,the new addition
- Alan Chatterton
- Senior Member
- Posts:2945
- Joined:Fri Feb 06, 2004 11:18 pm
- Location:Redditch, Worcestershire
Exhaust
You have already removed the bottle neck by putting on the CW back box. Full sport ( no boxes) can be a little noisy........... But nice!
Semi sport (one central silencer) is a good compromise and offers a roarty exhaust note without being too load.
You probably won't notice any performance gains over the standard centre section, but it will sound nicer.
Alan Chatterton
Chairman
Triumph 2000/2500/2.5 Register
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Semi sport (one central silencer) is a good compromise and offers a roarty exhaust note without being too load.
You probably won't notice any performance gains over the standard centre section, but it will sound nicer.
Alan Chatterton
Chairman
Triumph 2000/2500/2.5 Register
Sent from my iPhone using Tapatalk
Alan Chatterton
Location; Redditch
DEL 33 1972 Lines Stag Estate Tartan Red
Blog http://vml3m.blogspot.com/
Location; Redditch
DEL 33 1972 Lines Stag Estate Tartan Red
Blog http://vml3m.blogspot.com/
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- Location:South Oxfordshire, UK
Re: Exhaust
I think that Chris recommends the single box centre section rather than the straight through on an estate as they can 'boom' a bit more.
I've had the straight through centre with big back box before on a saloon and they are fine above ~50MPH (you tend to leave the noise behind you!) and 'OK' below that speed. It will of course very much depend on how heavy your right foot is! And what your preception of 'noise' is...
Cheers,
Mike.
I've had the straight through centre with big back box before on a saloon and they are fine above ~50MPH (you tend to leave the noise behind you!) and 'OK' below that speed. It will of course very much depend on how heavy your right foot is! And what your preception of 'noise' is...
Cheers,
Mike.
(South Oxfordshire)
Register Member No 0355
1971 2.5PI Saloon Sapphire blue
1973 2.5PI Saloon rust some Honeysuckle
1973 Stag French blue
(1949 LandRover was blue should be light green!)
Register Member No 0355
1971 2.5PI Saloon Sapphire blue
1973 2.5PI Saloon rust some Honeysuckle
1973 Stag French blue
(1949 LandRover was blue should be light green!)
Re: Exhaust
If I may 'jump in ' on this thread,rather than starting another - I have a queery re fitting the back box. I have recently purchased C.W. semi-sport center and back box for my Estate,as per recommended by C.W. to avoid the BOOM!
I was however surprised that the recommended 'hanging ' of the rear box was by drilling a hole in the boot floor,rather than like for like fitting using the factory welded on lug for the rubber mount. Whilst drilling a hole is obviously not a big deal,i would rather not if there is another way around it. As i am a while away from setting up it's position,i thought I'd enquire in advance on this to see if anyone has come up with a solution.
Regards,Nige.
I was however surprised that the recommended 'hanging ' of the rear box was by drilling a hole in the boot floor,rather than like for like fitting using the factory welded on lug for the rubber mount. Whilst drilling a hole is obviously not a big deal,i would rather not if there is another way around it. As i am a while away from setting up it's position,i thought I'd enquire in advance on this to see if anyone has come up with a solution.
Regards,Nige.
Member Number 7392 04/07
1975 TRIUMPH 2500S AUTO ESTATE IN BRG!
DON'T TIDY UP - LEAVE IT WHERE IT FELL!!
1975 TRIUMPH 2500S AUTO ESTATE IN BRG!
DON'T TIDY UP - LEAVE IT WHERE IT FELL!!
- Alan Chatterton
- Senior Member
- Posts:2945
- Joined:Fri Feb 06, 2004 11:18 pm
- Location:Redditch, Worcestershire
Exhaust
Not really, if you use the original hanger and make it work, it will hang too low. Drill the boot floor and fit a large good quality bobbin.
Alan Chatterton
Chairman
Triumph 2000/2500/2.5 Register
Sent from my iPhone using Tapatalk
Alan Chatterton
Chairman
Triumph 2000/2500/2.5 Register
Sent from my iPhone using Tapatalk
Alan Chatterton
Location; Redditch
DEL 33 1972 Lines Stag Estate Tartan Red
Blog http://vml3m.blogspot.com/
Location; Redditch
DEL 33 1972 Lines Stag Estate Tartan Red
Blog http://vml3m.blogspot.com/
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- Site Admin
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- Joined:Mon May 08, 2006 9:50 pm
- Location:South Oxfordshire, UK
Re: Exhaust
While I agree with Alan that there is not really any other solution, I have my concerns about using a 'bobbin' type as it is then used in a mode that it was not designed for. That is under tension rather than compression. The metal end plates are only bonded somehow (glued?) to the rubber and I have had them come adrift in the past.
A better solution would be a bolt going right through with some rubber/poly bushes to isolate the bolts from the exhaust itself. Or maybe a metal strap to take the load sideways and then up into the floor with the isolation bushes on this strap.
Without re-engineering it I suspect you'll be stuck with the 'bobbin' approach!
Cheers,
Mike.
A better solution would be a bolt going right through with some rubber/poly bushes to isolate the bolts from the exhaust itself. Or maybe a metal strap to take the load sideways and then up into the floor with the isolation bushes on this strap.
Without re-engineering it I suspect you'll be stuck with the 'bobbin' approach!
Cheers,
Mike.
(South Oxfordshire)
Register Member No 0355
1971 2.5PI Saloon Sapphire blue
1973 2.5PI Saloon rust some Honeysuckle
1973 Stag French blue
(1949 LandRover was blue should be light green!)
Register Member No 0355
1971 2.5PI Saloon Sapphire blue
1973 2.5PI Saloon rust some Honeysuckle
1973 Stag French blue
(1949 LandRover was blue should be light green!)
- Alan Chatterton
- Senior Member
- Posts:2945
- Joined:Fri Feb 06, 2004 11:18 pm
- Location:Redditch, Worcestershire
Exhaust
That's a good point. Or, an old engine mount works well!
Alan Chatterton
Chairman
Triumph 2000/2500/2.5 Register
Sent from my iPhone using Tapatalk
Alan Chatterton
Chairman
Triumph 2000/2500/2.5 Register
Sent from my iPhone using Tapatalk
Alan Chatterton
Location; Redditch
DEL 33 1972 Lines Stag Estate Tartan Red
Blog http://vml3m.blogspot.com/
Location; Redditch
DEL 33 1972 Lines Stag Estate Tartan Red
Blog http://vml3m.blogspot.com/
Re: Exhaust
I have too Mike and suspect that a metal plate bolted across ways to the exhaust mounting position, suspended by two bobbins would be better. Never tried it though.Mike Stevens wrote:While I agree with Alan that there is not really any other solution, I have my concerns about using a 'bobbin' type as it is then used in a mode that it was not designed for. That is under tension rather than compression. The metal end plates are only bonded somehow (glued?) to the rubber and I have had them come adrift in the past.
Cheers,
Mike.
I have also been told that Stag gearbox mount bobbins are much stronger and would be better.
Colin
Colin and Amanda Radford
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'75'N' 2500S CARMINE ESTATE France easter'09, RBRR'10,'12. TEAM 48 RBRR'16 'HOE'
'71'J' 2.5PI VALENCIA SALOON France easter'10, RBRR'14 'FRanK'
'69'G' VALENCIA SALOON c/w BMW 2.5 24valve and 5spd box 'JO'
Register Show Organisers and Directors
'75'N' 2500S CARMINE ESTATE France easter'09, RBRR'10,'12. TEAM 48 RBRR'16 'HOE'
'71'J' 2.5PI VALENCIA SALOON France easter'10, RBRR'14 'FRanK'
'69'G' VALENCIA SALOON c/w BMW 2.5 24valve and 5spd box 'JO'
- Jonathan Lewis
- Senior Member
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- Joined:Sun Feb 22, 2009 4:28 pm
- Location:Monmouthshire
Re: Exhaust
I too have had a tailbox bobbin separate but, it must be said, after 20+ years and quite a lot of miles!
In fairness, I think that the 'proper' bobbins are sold as an exhaust mount - albeit for a Mini
In fairness, I think that the 'proper' bobbins are sold as an exhaust mount - albeit for a Mini
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