3F on gas - worth bothering with?

[hj 45]

G'day all, I'm currently looking for a 75 series trayback and I've found a tidy FJ 75 - thing is I'm uncertain on the 3F (I'm a diesel bloke usually). The only reason I'm considering it is because of the fact it's dual fuel. So, what are these donks like on gas? I'm not expecting a race motor but if it can get the job done and save a bit of cash with LPG then it's an option. Also, the 3F still has the dirty old school dissy right? Who makes a good electronic version these days?

TIA.

[hj 45]

Surely someone has a 3F out there?

[pcman]

not 3f but 2f is all ive dealt with
similar motors

depending on engine and gas system anywhere from 15l per 100 to 30l per 100

most would be about 20L per 100

[hulsty]

I had a 3F on gas in a middy, went well, would pull 4500-5000rpm, reasonable poke for a old motor (52kw at the wheels on 33''s) chewed ~25L/100km on the tar worst I got was 60L/100km off road.

Motor was as tough as old boots, it just kept going.

[hj 45]

Thanks guys, still a bit worried about the amount it'd chew, even on gas. Anyone here tried an electronic dissy conversion?

[hulsty]

I fitted a vk commoner hei, extractors, 2.5 system, snorkel and had it dyno tuned

[Bearded1]

Thanks guys, still a bit worried about the amount it'd chew, even on gas. Anyone here tried an electronic dissy conversion?

I put an electronic dizzy on my mates 2F and it improved performance and economy, but marginally. I still have the dizzy and associated components here if it fits a 3F (make an offer if you want it). That said however, I can't help but think that there is no shortage of diesels out there so why are you even considering a petrol. Or maybe, rather than put gas on the petrol, you could do a diesel conversion. I picked up a good 2H on this forum for $500; -much cheaper than a gas kit.

[GO79]

I had a fj 75 and put a 120ltr tank on the back was great specially when gas was 50c a ltr, my latest petrol ute I've sunk a 120ltr tank half under the tray and put a big tool box over it

[hj 45]

Thanks guys, still a bit worried about the amount it'd chew, even on gas. Anyone here tried an electronic dissy conversion?

I put an electronic dizzy on my mates 2F and it improved performance and economy, but marginally. I still have the dizzy and associated components here if it fits a 3F (make an offer if you want it). That said however, I can't help but think that there is no shortage of diesels out there so why are you even considering a petrol. Or maybe, rather than put gas on the petrol, you could do a diesel conversion. I picked up a good 2H on this forum for $500; -much cheaper than a gas kit.

I may well just go another diesel, a 3F sounds like it might be more trouble than it's worth.

[Clanky]

The 3F is alright on gas. It would be cheaper to run a 3F on gas rather than a 2H. On gas you can also push the oil change out to 10000kms as it doesnt get contaminated as much.
Only trouble can be with valves and seats after a long period. These can be fixed relatively cheaply though as the engine is old skool.
Is the one you are looking at injected or carby? Injected ones produce more power and economy (if that word can be used to describe a 3f) than the carby ones as the gas setup is better.
Pertronix make a bolt in electronic setup (best to get matching coil and ignitor from them so you dont get incompatibility issues). Easy to fit and reliable. You can also carry the old set of points and condenser to get you out of any trouble if you wish.
http://www.proquip.com.au/ProductPages/ ... itor1.html" onclick="window.open(this.href);return false;
On Ebay
http://cgi.ebay.com.au/Pertronix-Ignito ... 2eb1d8aa02" onclick="window.open(this.href);return false;

If the truck you have found is a ripper, you could run the 3F while you acquire the parts for a Diesel conversion later on.

[hj 45]

The one I'm looking at is an '89 model - carbied. Looks real clean. Thanks for the link to the Pertronix, I'll keep it in mind.

[GO79]

The 3F is alright on gas. It would be cheaper to run a 3F on gas rather than a 2H. On gas you can also push the oil change out to 10000kms as it doesnt get contaminated as much.
Only trouble can be with valves and seats after a long period. These can be fixed relatively cheaply though as the engine is old skool.
Is the one you are looking at injected or carby? Injected ones produce more power and economy (if that word can be used to describe a 3f) than the carby ones as the gas setup is better.
Pertronix make a bolt in electronic setup (best to get matching coil and ignitor from them so you dont get incompatibility issues). Easy to fit and reliable. You can also carry the old set of points and condenser to get you out of any trouble if you wish.
http://www.proquip.com.au/ProductPages/ ... itor1.html" onclick="window.open(this.href);return false;
On Ebay
http://cgi.ebay.com.au/Pertronix-Ignito ... 2eb1d8aa02" onclick="window.open(this.href);return false;

If the truck you have found is a ripper, you could run the 3F while you acquire the parts for a Diesel conversion later
on.

all injected 3fs in aus only come coupled with a auto in the 80 series , all 7x series and manual 80 series with 3f run carb , yet in the US 62 series they run the 3fe ( injected 3f )