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Fuel Efficient


MiKa

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  • Donating Members
  • Member For: 18y 4m 15d
  • Gender: Male
  • Location: Melbourne, VIC

Ok so dunno if you all have seen my other thread, basically I got a new job and it involves me driving 80km round trip to work everyday, my T is gonna chew through a lot more fuel than I'm use to. What I wanna know what will make my car more fuel efficient? Obviously my right foot has the most to do with it but what mods would help.

Mods to the car so far:

Nizpro cooler

Nizpro 4" intake

Nizpre battery relocation

Nizpro V/springs

Dekka 60's

Stock exhaust

Stock fuel pump

Stock actuator/wastegate

Makes 250rwkw's safely. Last time I had it on the dyno, I think it was running a tad rich so improvements can be had there.

What I wanna know is if I change Cat or cat/dump and retune would that help?.

Would it be worth getting a 91 tune?

Im not chasing more power as my cars done almost 200,000kms and the 4sp and engine wouldn't like it very much and the last thing I need is to fix anything.. Thought about a cheap daily but don't have room for one and theres 2 regos, 2 insurance and I couldn't stand driving a piece of sh*t everyday. I eventually would want to get an FG xr6t or g6et but that's down the track as I'm building a house atm too..

Anyother ideas as what mods can 'help'? Worse case scenario it public transport but really CBF lol...

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  • Member For: 18y 7m 9d
  • Gender: Male
  • Location: @ my laptop

have seem cases where injector change has helped, when was the last time plugs were changed? O2 sensor changed? what temp thermostat? what plug gap has your mechanic checked compressions Fuel trims etc etc

Edited by ratter
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  • Donating Members
  • Member For: 18y 4m 15d
  • Gender: Male
  • Location: Melbourne, VIC

Plugs changed last service, 02 sensors have prob never been changed, plug gap is .7 Doubt compression and fuel trims were checked..

The way my mind thinks of it is, if everything is freed up than it will make the whole car perform more efficiently, like with a dump and cat, less back pressure, will make the same power on less boost, a retune with more emphasis on fuel economy than just out right power.. Maybe I'm just unconsciously just wanting to do more mods and trying to justify it to myself lol..

Edited by MiKa
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  • Member For: 11y 6m 4d
  • Gender: Male

Dont touch the exhaust. You'll go backwardds.

I assume you've already got the plenum done? Only thing I can suggest is fitting a voltage booster to the coils & opening the plug gap back up. Maybe port the wastegate too, the ecu will be able to regulate the boost at speed a little better

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