Outer Limits 4x4 Board

HI,
Just curious as to what sort of fuel economy i should be getting from my petrol 4.2?

Also what can i do to get better economy from it?
It's 1990,5 speed,air & steer,carbi.
It has 278,000 ks,but has been serviced every 10,000ks.
Any help greatly appreciated.
Thanx, james

KRI55 wrote:HI,
Just curious as to what sort of fuel economy i should be getting from my petrol 4.2?

Depends how you drive it, 20l/100klms...

KRI55 wrote:Also what can i do to get better economy from it?

put a diesel in it.

KRI55 wrote:It's 1990,5 speed,air & steer,carbi.
It has 278,000 ks,but has been serviced every 10,000ks.
Any help greatly appreciated.
Thanx, james

or put a 350 chev in it.

I have a 91 model shorty and mine is terrible bout 20l for 60km. I think the gaskets have dryed up of something. It runs gas as well.

if you are running 35's or bigger I would sugest 4.6 diff gears, modified rotor butten, extracters always run genuine plug leads all of these little things add to a good running motor wich means less time with the right boot to the floor because the only time you really chew the juice is when the second throat opens up.

apart from converting to electronic ignition, what can you modify on the rotor button?

Thank you every1 for your help.
I have arranged to get extractors fitted this week.
I'm only running 31's.
What can be done to the rotor button for economy???



OH and bogged,will i really get BETTER fuel economy out of a 350 chev?? lol.

KRI55 wrote:OH and bogged,will i really get BETTER fuel economy out of a 350 chev?? lol.

yep, you are asking a more powerful motor do do less work.

The modified rotor butten will create a more cleaner spark in the distributer, All it is they do is simpley tig or bronze weld a tab to the edge of the existing contact point on the rotor butten wich closes the gap between both terminals, also improves high reving.

So where can these modified rotor buttons be bought from? How much?
and my last question, (for now) where do I find a kit of somesort to convert to electronic ignition?

I run LPG on my carby 4.2 and it has a bit of a rough idling issue.

Cheers,

Rod

rOd wrote:So where can these modified rotor buttons be bought from? How much?

Piranha in Bayswater.

rOd wrote: and my last question, (for now) where do I find a kit of somesort to convert to electronic ignition?

Jaycar do a kit.

rOd wrote:I run LPG on my carby 4.2 and it has a bit of a rough idling issue.

put in a diesel

1. Diesels Suck

2. You will never get anything close to reasonable economy with a TB42

3. My fuel economy got heaps better with the V8, more than double the power and less fuel!!

4. Plenty of places can modify the rotor button for you, shouldn't cost more than $20 plus a new rotor button.

5. Get the Ignitor brand electronic ignition, simple and works brilliantly. The best ~$300 you'll ever spend.

If you're in Melbourne I know Aus4WD can modify the rotor and they stock the elec ignition modules.

My brother gets 15lper100k from his 4.2 GQ wagon on 31" tyres. Spoke to a guy on the weekend who said extractors gave him an extra 50k to his range in a GQ wagon & he was on 35". My GU 4.5 is around 18lper100k on 35" allterains. Also all the above vehicles are manuals.

Anyone in Sydney does rotor mod?

Rod