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						IMHO I would doubt any worthwhile increase in power on a Puma Defender from exhaust mods alone. Ya might get a bit more noise, but that's about all. So, unless ya're going for a "massive" engine, looking for 180/190 hp+, I'd be leaving the exhaust alone.
Of course, anyone can prove me wrong, by putting their totally stock Puma on the rollers, remove mufflers or whatever, & then do another run,..
It has been shown by well regarded tuners in the UK, BAS, Alive, etc etc, that the way to go is ECU remap, & for anything over 160hp an intercooler is required. With hot Aussie conditions, I'd say an intercooler would be mandatory.
But for normal upgrades, they don't touch the exhaust, simply because, there's no measurable gains to be made.
Finally, & I'm not telling anyone how to suck eggs, but a "chip" is not the way to go either. There are "chips' about, several of them, that "piggy back" the standard ECU,......I wouldn't touch one. Only way to go is a remap of your ECU by a reliable tuner.
Pickles.
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						I have done a load of reading in this site & UK sites.
This is my experience.
Where i live the cab gets extremely hot in summer even with the windows down. Lots of people had said once they removed the centre muffler completely or fitted a sports muffler the cab temp dropped greatly, with other mods in mind i opted for the free flow sports muffler to keep a little back pressure. I will also retain the rear factory muffler. That one little change ($250) has in my mind made the engine run smoother but more importantly for me the cab is cooler which i believe everything in & around the engine is also cooler. That alone must be a good thing.
As for chipping/mapping i will be going down the route of mapping with a local (Ashmore) having great success in remapping the 2.2 puma, the other plus with this remap I'm looking at $1600 with 1 rewrite. From what i have read on this subject that is not a bad price.
The very next thing i will fit before the remap is the dump pipe, i have done this to other turbo diesel 4x4's with a great improvement in torque right were needed.
After speaking to a fair exhaust shop owner (rather than one that just wants to take my money) his advise was to keep the factory pipe work due to its size & change the parts that are not working how they should. Now i have always used a company out the back of the Gold Coast for my exhaust work but they just wanted to take my money $1200 for a complete system & have not to-date done a system for a Puma engine.
This is what I'm doing to my 2.2 Puma.
Do your homework & do whats best for your requirements.
As for the dump pipe supplier, if i can get enough people interested i may be able to get a better price PM me if interested.
Cheers
David
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						David,..."Ashmore"?....never heard of 'em. Not that that means anything!!!....What do they do, ...any website, tune details etc,...there aren't many "local" tuners about.
What sort of power & torque are you looking at?.....Do they recommend a better intercooler?
Pickles.
You could do a lot worse than talking to these guys.
They have some knowledge that most ecu tuners don't have.
www.maptec.com.au
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						Pretty smart looking website,...however, the background colouring/leather seats etc!!!!.....makes it hard to read stuff on the web page!!
Have they done any Defenders that you know of Rambling?
Pickles.
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						SubscriberYes, they have achieved 145kw/430nm with a 'what they call' moderate all round tune.
I don't really know the standard figure but was told by them something around 119kw/385nm.
So their standard tune gives around 30% performance increase plus includes egr switching and a few other fine things. No induction or exhaust modifications are necessary at this stage.
If it was to be overwritten on a Land Rover service update,(which would be accidental , not deliberate), they would give complimentary rewrite.
You can talk to Haydn , nice guy , gives you the time to talk.
Dennis
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