Thread: Economy via exhaust mods....

I have no converter on my series one disco and still only get 20l/100km.

disco95 wrote:
<div class='quotetop'>QUOTE</div><div class='quotemain'>I have no converter on my series one disco and still only get 20l/100km[/b][/quote]


That's not what I wanted to here...

...... but better now than after.... as the 2 cats on mine are not that easy to replace.... :roll:

Be aware that with out the cats you might have some leagle problems,

State you live in might make a diference.

Didn't think removing the cat converters would do that much for fuel economy. Might make the exhaust note a little different or get you pinged by a fussy mechanic on the annual pink slip if it's not on there. Could try a complete aftermarket exhaust system, might do something for economy.

FI ? Most FI computers have a lean cruise mode where fuel mixture is brought right back to "just enough" to keep it going to maximise fuel economy when, strangely, you're cruising. Don't know if that can be improved by a chip or needs one of those interceptor modules like tunit.

There's mixed opinions on "hiclone" that is supposed to improve fuel efficiency. 'nother option you could try.

Changing your exhaust will help and make your engine breath better but you will not notice it at all and I would'nt advise you doing so but then again it would make it sound like a V8 should 8)



Adam

I know a bloke - who had a 91 Falcon ute - the thing was a mad fuel guzzler, anuhow one day hes driving along and Bang - the cat blew, now the vehicle was registered in Vic where its one roadworthy per life of vehicle - untill ya sell it, so this bloke i Knew bought an engine pipe from an XC falcon and the middle pipe from an XD (No Cat). He matched it up to the tail pipe he had.

The fuel economy lifted from 5-6 Km per litre to about 10 km per litre - I was wrapped .... I mean he was wrapped.

He did have trouble convincing the exhaust bloke to seel him the pipes - as he didnt want to be involved in removing the cat..... so he ws told the vehicle was for farm use only and wasnt registered in that state and would never see the road.... part right.

Mate I recon that if you dont live in NSW - ar any other state where you are subjected to revinue rasing "pink slip" type rego inspections every year do it.

BUT beware that the fine for removing the cat is in the vicinity of thousands of dollars as its an EPA matter

Mick

Exhaust shops go down BIGTIME for messing with cats.
The easyest way to inprove the flow is to drop the header pipe and puch the insides out of the cat with a steel rod or something similar.Visually its still intact but internally its barren.BUT if they stick a tube up its bum and test the exhaust gas,you will be up for a new pussy.
Andrew

Thanks guys... looks like a mixed batch... I think I'll sit on it a while ... taking a closer look... the existing Cats are in a pretty awkward place to swap them to see.

I had a 5 litre commdore ( It's OK I got over it [img]style_emoticons/<#EMO_DIR#>/biggrin.gif[/img] )... we pulled the Cat off that.. and I got a 35% increase in economy... and more power!... that was one of the reasons my mates idea sounded interesting..

.. Adam you raise a good point - If I get it to sound like a real V8 .... I might like the noise too much -- and Halve my economy 8O

think I'll ponder other options....