3f improvements

A cam would help, but it all comes down to what is available for this engine.

If you could get aftermarket
Cam
Roller rockers
New valve sprigs
Intake manifold
Extractors and good exhaust as well as freeing the air induction system up you could see some quite nice gains

Generally speaking a bigger cam is pointless without a better flowing intake manifold and a better flowing intake manifold is pointless without a good flowing induction system, all the above is pointless if your exhaust system is restrictive, what do the 3F heads flow like? As you will be fighting a up hill battle if the heads don’t flow enough to make the most of everything else. What I am saying is everything need’s to be able to work together.

A super charger will give you the best bang for your buck, Even if the flow rates of everything else is chit pushing compressed air down it’s throat will make things happen.


Cheers.

g'day
my uncle spent $7k on his 3f and it boogied,pushed a troopie to 190 and was good for 6500 rpm. Just like the previous post said, there is no magic fix,you really have to make a lot of small improvments to gain any kind of result
dunno what s/charger you have in mind (spintex will want most of $6k) but personally I wouldn't stuff around with modified 3f
bite the bullet GET A V8!

The 3F shouldn't be sluggish. Have you had the auto box looked at recently. Maybe it needs a tune-up?

The Anne Beadell Hwy is very corrugated for most of 1200km. Go to my website below, click on 4x4 and then scroll to the bottom of the page and click on Western Deserts 2006 and read about the AB.

Cheers

I have just had my 3f carby looked at ( 1985 auto landcruiser)

A mechanic who had the same car back then said if I had the main fuel jets increased by 2 thou I would relieve a lot of the problems with a sluggish motor.

The jets have been bored out and I have certainly had a big improvement in the performance of the car. I don't need to "push " the car now , but need to take it easy , goes allong the expressway at 125mph now , no worries . When I mean not having to push it I mean it really goes ??? , I have to just touch the accelerator

When he did the carby he said in the previous service to the carby the gasket had not been fitted correctly and the acceleration pump port was covered and a few other ports were covered , so need a new gasket.

If a couple of weeks l be having a new carby kit fitted and the tappets done.

Boring out the fuel jets is an easily reversable decision , why I did it , as you only need to replace the jets if it does not work .

Hard to know if I use more fuel yet as the extra work needs to be done . On the 250k trip back from whwere the mechanic was , I used 16L/100k up 1L on normal , but was travelling at about 10kmh more than normal . The fuel consumption is really just how far you put the foot down .

I think it is worth a try

Look, there is no nice way to say this....it will take big money to get small gains....the most will come from a 060 thou shave of the head, and porting...but why??? trade it on a 4.5 80 series, selling for between 8 and 10k these days...
You will spend that on a supercharger and a few new motors at least....
If you want to keep the old girl, do the head up, put extracters and electronic ignition and the new main jets, and you will end up with a reliable, legal ride you can take anywhere...
Andrew