12 replies to this topic

[henuz96]

Hi All

 

Im thinking about getting a new exhaust. now mini speed sells a DTM Twin Exhaust but is it the same as a Fletcher DTM exhaust. if its not which one should i buy and why?

 

Cheers

 

Henuz

[cal844]

fletcher.. better quality, i bought a full system

maniflow 1.75 inch manifold

fletcher 1.75 to 2.25inch Y piece and 

fletcher2.25 to 3 inch link pipe 

3 inch diameter piped rear box... sounds amazing.

all for £300 ish

 

this style rear box

http://www.ebay.co.u...=item5d456352e9

Edited by cal844, 28 November 2013 - 11:45 AM.

[adam26y]

Slight side note. Doesn't a 3" pipe drain the engine? I've never gone over 2". As for comparison, Fletcher's are a very good build quality and quite a few people on here swear by them, have you looked at maniflows dtm? http://www.maniflow....t&product=1248. £165 and yet again a lot of people on here wills wear by them, at 1 3/4" pipe diameter it'll be better for your engine and should sound pretty nice.

[HarrysMini]

Slight side note. Doesn't a 3" pipe drain the engine? I've never gone over 2". As for comparison, Fletcher's are a very good build quality and quite a few people on here swear by them, have you looked at maniflows dtm? http://www.maniflow....t&product=1248. £165 and yet again a lot of people on here wills wear by them, at 1 3/4" pipe diameter it'll be better for your engine and should sound pretty nice.

Yes they do, and so do DTMs.

[adam26y]

Slight side note. Doesn't a 3" pipe drain the engine? I've never gone over 2". As for comparison, Fletcher's are a very good build quality and quite a few people on here swear by them, have you looked at maniflows dtm? http://www.maniflow....t&product=1248. £165 and yet again a lot of people on here wills wear by them, at 1 3/4" pipe diameter it'll be better for your engine and should sound pretty nice.

Yes they do, and so do DTMs.

I've always used a 2"straight through pipe single box. On a pretty heavily modified 1275 and it sounded immense and the engine really responded to it.

[HarrysMini]

 

 

Slight side note. Doesn't a 3" pipe drain the engine? I've never gone over 2". As for comparison, Fletcher's are a very good build quality and quite a few people on here swear by them, have you looked at maniflows dtm? http://www.maniflow....t&product=1248. £165 and yet again a lot of people on here wills wear by them, at 1 3/4" pipe diameter it'll be better for your engine and should sound pretty nice.

Yes they do, and so do DTMs.

I've always used a 2"straight through pipe single box. On a pretty heavily modified 1275 and it sounded immense and the engine really responded to it.

 

If your engine is heavily modified, then a bigger exhaust is needed. 2" would probably be correct, obviously depending on what the engine spec is.

[Cooperman]

Except on engines which rev at over 7500 rpm the exhaust should not be larger than 1.875" internal diameter (= 2" OD). The optimum size is 1.75" internal diameter.

That diameter should be from the manifold end to the final exit point. A higher pressure turbocharged engine can need a larger pipe diameter and to calculate the size you multiply the area of the 1.75" pipe by the pressure factor and from the new optimum area you can get the required diameter.

Noise does not produce power, it is exhaust gas velocity which is important. A larger diameter exhaust will obviously have a slower gas flow speed which causes a higher localised back pressure due to loss of inertia on the molecules of gas.

That is why the RC40 & Maniflow 1.75" ID exhausts are so popular on Minis with improved performance engines.

[adam26y]

http://www.maniflow....61&product=1386

Not sure what others opinions on this are but this looks good value in response to the initial question.

[Cooperman]

That's the best you can buy.

[Midas Mk1]

Rc40 / Maniflows can be considered boring. Get the exhaust you want, it'll save you money in the long run. 

Following your op, answering your question rather than going on the same old exhaust noise rant, out of the two personally i'd go for the fletcher, they look to have a better quality construction.

 

Edited by Midas Mk1, 29 November 2013 - 12:12 PM.

[Guess-Works.com]

Apart from the arguments for not having big more exhausts...

 

For the quality of build and resistance to speed bumps and general scrapes, I would not buy a stainless one...

 

This is the one I would buy... http://www.maniflow....10&product=1395

[MrBounce]

I have twice had issues with exhausts coming off due to speed humps. The first one (an old knackered RC40) was nearly destroyed and virtually impossible to put back together; the other was a centre exit Maniflow which took a much harder hit. It went back together as if it was new.

 

I know that people bang on about Maniflow being "boring", but I would take build quality over flash and loud anytime.

[Cooperman]

Why or how can a highly efficient and top quality exhaust system be 'boring'? Unless the best is 'boring' so something of lesser standard is interesting.