Puma 2.2 Exhaust Upgrade

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Roland Butter

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Hi all. I am hoping to replace the factory exhaust on a 2014 Puma 90 with a Demand unit. This will mean removing the current downpipe with the DPF, which I understand makes the exhaust illegal? Will this mean that I'll have to reinstall the original downpipe prior to an MOT. Thanks.
 
Roland Butter said:
Will this mean that I'll have to reinstall the original downpipe prior to an MOT. Thanks.
Click to expand...
Probably. Depends on how your MOT tester views it.

There are several sensors connected to the CAT / DPF unit. You might want to research how not having these any more affects the ECU and engine + EGR operation. And also how this will affect future diagnostics readings. If you have to replace the CAT/DPF for the MOT, will you have to re-install the original ECU map? I'd be interested to know ----- let us know how you get on.
 

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Wimblowdriver said:
Probably. Depends on how your MOT tester views it.

There are several sensors connected to the CAT / DPF unit. You might want to research how not having these any more affects the ECU and engine + EGR operation. And also how this will affect future diagnostics readings. If you have to replace the CAT/DPF for the MOT, will you have to re-install the original ECU map? I'd be interested to know ----- let us know how you get on.
Click to expand...
Thanks for replying. I have contacted my local MOT guy and will let you know his thoughts.
 
Additional - it's quite a big job to remove and replace the CAT/DPF, and involves removing the front chassis cross member. Something you might want to consider if you plan to replace and remove for every MOT.
 
Wimblowdriver said:
Additional - it's quite a big job to remove and replace the CAT/DPF, and involves removing the front chassis cross member. Something you might want to consider if you plan to replace and remove for every MOT.
Click to expand...
Thanks for replying. Yep, I'm new to this Defender lark, so have no idea about most issues.
 
Wimblowdriver said:
Out of interest, what are you hoping to achieve by fitting a straight through system?
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It will have a centre section silencer. I'm going for a Stage 1 remap with a new intercooler and read that Demand manufactures top end exhausts, so I'll bite the bullet and do it all in one go. By chance, a guy in our village has one fitted to his 90 and it sounds impressive.
 
Has your Landy got aircon? if so it might not be possible to fit a bigger intercooler (if that's your plan), as the cooler is a tight fit between the aircon rad and the main engine cooling rad. If no aircon, should be ok.
 
Wimblowdriver said:
Has your Landy got aircon? if so it might not be possible to fit a bigger intercooler (if that's your plan), as the cooler is a tight fit between the aircon rad and the main engine cooling rad. If no aircon, should be ok.
Click to expand...
Yes it has AC. The Defender guy at my local garage has specified one and will fit it.
 
Roland Butter said:
It's a KAHN model which is pretty much all cosmetic. It looks the part, but is basically a 2.2 PUMA with bolt on bits. The upgrades would give it some validation.
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2.2 Puma validation? How old are you ;)?

A V8 gives validation :p, not a noisy exhaust and 100bhp.

Sorry short fuse today. It’s your money :rolleyes:

J
 
There are quite a few Puma model Defenders in the 'crash damaged' category @ salvage yards. They (Defenders in general) are not designed to go fast, they pootle and to be honest they are excellent at pootling. Racing around just isn't what they do well. Of course you could upgrade the suspension, steering etc to make it a bit more stable on the road, but still it isn't a 'fast' car, it's a Defender.

Do you have the MT82 6 speed manual gearbox ?
They have a bit of a design fault (the premature wear of the output shaft) which can be 'upgraded' and is something i'd highly reccomend you do.

www.winchestergears.com

Performance MT82 TDCI 2.2 & 2.4

Winchester Gears PERFORMANCE MT82 6-Speed Gearbox At Winchester Gears, we proudly introduce our Performance MT82 Gearbox, a high-quality, upgraded
www.winchestergears.com www.winchestergears.com
ashcroft-transmissions.co.uk

MT82

We are able to supply the MT82 6 spd manual Defender gearbox as fitted to the 2007 onwards 2.4 / 2.2 TDCi engine. One of the common failures of the MT82 box is the premature wear of the output shaft due to a design fault. We have developed a kit to remedy this issue. You may
ashcroft-transmissions.co.uk ashcroft-transmissions.co.uk

I would also start looking (in depth) at the chassis, bulkhead and other vunerable parts to make sure they are not being eaten by the tin worm and are protected against such an attack. At 11 years old this will help in ensuring it lasts another 11 years without major costs/repairs etc.

Removing bits, like the springs and shocks, A frame, front and rear radius and steering arms etc and refitting with new bushings, bolts/fasteners and plenty of grease will also pay dividends over time and make the car feel a lot 'tighter' on the road.

Of course non of this will make it look or sound any better, but it will be better, much better.
Changing the rear section as @Wimblowdriver said is a really good option changing the whole exhaust system will cost a fortune and cause you headaches as well as diverting money away from what makes a 'good Defender' good.
 
^^I agree with all of that^^. I keep mine in bog standard condition for lots of reasons. They have a speed limiter built in, I think it's in the ECU programming. Limited to 90mph. I have taken it to that on a few occasions, on straight motorways and dual carriageways (not in this country officer, honest). JLR were wise to do this, knowing the limits of the chassis, steering, brakes, suspension etc. I would not want to go any faster than this "on road" in a defender for obvious reasons. They are built as a work horse, not a sports car.
 
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