More power 3F ?

[Gordz]

Hi All. I’m sure this has been spoken about before, but im going through this, and need some advice.

I’m from South Africa; a few mates and I have 62's fitted with 3F motors (we don’t get the 3FE here unless imported).

Now for my question:

Without doing a transplant, what can be done to get more power from our vans. I have done the following already:

High performance HT leads, electronic points, larger coil, set plugs to 1mm, performance exhaust, ported head, changed the jetting in the standard carb... and that’s about it.

Now if i wanted to go turbo, or supercharger... .i would have to go with 3FE head etc. i would have to import everything.

Is there anything else i can do to my van to give it the extra power without changing the head, or whole motor ?


Many Thanks,

gords.

 

[Yspen]

Set timing to 13- 14 degress
see here : https://forum.ih8mud.com/40-55-seri...what-properly-tweeked-engine-will-do-you.html
and
https://forum.ih8mud.com/60-series-wagons/127607-timing-advancement;-how-far.html


TBi may be an option but difficult to fit in SA

Fit smaller wheels

 

[PabloCruise]

I wonder if your exhaust manifold is the same as the 3FE?

What do you mean be perf exhaust? Is it from manifold back?

My understanding is that the 3FE exh manifold is pretty effective.

I think your next step might be a cam. Take a trip through here: https://forum.ih8mud.com/40-55-series-tech/79962-aftermarket-performance-2f-cams.html

and

https://forum.ih8mud.com/40-55-series-tech/87140-best-2f.html

 

[4x4rob]

Problem with performance cams is that you are removing the variables of the engine, either plenty power but no cruising or vise versa

 

[tonkota]

Problem with performance cams is that you are removing the variables of the engine, either plenty power but no cruising or vise versa

I don't agree. Maybe with a high lift/duration cam, but you can improve over the stock with a mild to mid cam.

https://forum.ih8mud.com/60-series-wagons/214012-camshaft.html

After installing the Delta Camshaft cam my wagon is more drivable on the highway and in low speed driving.

 

[RockDoc]

I don't agree. Maybe with a high lift/duration cam, but you can improve over the stock with a mild to mid cam.

https://forum.ih8mud.com/60-series-wagons/214012-camshaft.html

After installing the Delta Camshaft cam my wagon is more drivable on the highway and in low speed driving.

Have you noticed any change in milage with the new camshaft profile?

Gordz - are you looking for a constant power boost, or short bursts of power? Aside from the things on your list, all I can think of is a changed cam and advanced timing (as mentioned already), and shaving the head to boost compression (which of course would require pulling the head). What does your performance exhaust consist of? Headers? Port matched to the head, or a touch larger opening on the header/manifold (this can help keep exhaust from surging back towards the cylinder). How well does your air intake/filtration system flow? Air inlet under the hood or outside the vehicle? What do you have available for gasoline octane rating? (and what standard, I think the standard varies between the US/NA and the rest of the world)

Has your tire size/gearing been changed? As Yspen eludes to, this can have a big effect on how you feel the power. If you don't need as much high-speed cruising, you might want to go with a re-gear to get more umph at lower speed. I assume it's an H55F you have behind the 3F, right?

 

[tonkota]

Have you noticed any change in milage with the new camshaft profile?

No change to speak of. I don't drive it enough for me to care now and when I do drive it, it's loaded to the gills.

 

[Yspen]

Ok . If you sit in Africa and want to order a Perfomance Cam for a 3F , what do you ask the suppliers for ? Considering that you want to improve low and top end performance .
I see IsKY cams have 3 types available - what is the difference ?

 

[RockDoc]

Ok . If you sit in Africa and want to order a Perfomance Cam for a 3F , what do you ask the suppliers for ? Considering that you want to improve low and top end performance .
I see IsKY cams have 3 types available - what is the difference ?

I would have a look through the link tonkota posted, as well as: https://forum.ih8mud.com/40-55-series-tech/79962-aftermarket-performance-2f-cams.html

The isky site gives the specs for their cams in terms of lift and total duration (you can calculate from the open and close positions). The factory specs for the 3FE cam are intake: open 22* BTDC, close 48* ABDC, exhaust: open 60* BTDC, close 10* ATDC (32* overlap, 250* duration on both), I have no number for lift. I *believe* that the 2F cam is simply retarded 5* relative to the 3FE cam. I have no idea how these relate to a carbed 3F cam, but perhaps someone else does, or you can find the toyota part number, and it can be confirmed whether or not it is the same as we get in NA for the 3FE/2F.

 

[Moby]

Ok . If you sit in Africa and want to order a Perfomance Cam for a 3F , what do you ask the suppliers for ? Considering that you want to improve low and top end performance .
I see IsKY cams have 3 types available - what is the difference ?

Typically you can't improve both low and top end performance with a cam change. If you add a lot of duration to your cam to improve top end performance (more time to get air in and out per valve opening) you get lazy low rpm performance. If you improve low end you typically run out of rpms.

However this isn't an issue for most landcruisers because they are low rpm engines so nobody really makes an off the self "top end" cam. Most cruiser performance cams concentrate on more lift (usually around .440") and moderately longer duration. These typically pull hard from just off idle to ~4000 rpm. Some cam makers offer a couple of cams however almost all still fall into the definition of relatively moderate, low to mid rpm cams.

 

[Yspen]

Most cruiser performance cams concentrate on more lift (usually around .440") and moderately longer duration.

Moby
what would that moderately longer duration be in real time figures ? ( .262 ? )
If you have to spec a cam for mid range performance (1500rpm to 3000rpm ) what would you ask the cam modifier to do?

 

[Gordz]

hi guys, ok... Ok as for the exhaust, from manifold to back stainless freeflow system.

I have changed my tyres from 31" to 33" so obviously my top end speed has gone. Gearing isnt really an option yet, as its expensive this side...hey Yspen

Even before the tyres, i wondered about how to get a bit extra out of her.

Would love to get a 3fe head, injectors etc and supercharge it. I presume, you cant supercharge it without being fuel injected (like a turbo) What would be needed.

Gearing... Yspen and others, is it a huge job to do this ? Yspen i know you had a lot done besides the gearing, was "just" the gearing expensive ?

 

[Yspen]

Gearing... Yspen and others, is it a huge job to do this ? Yspen i know you had a lot done besides the gearing, was "just" the gearing expensive ?

Labour and parts about R16000 here in South Africa ( $2000) . Fitted 4,56:1 . Imported the R&P myself via Justdiffs ( I asked the mechanic to rebuild the whole diff while he was busy - so all seals etc were replaced )

 

[tonkota]

Moby
what would that moderately longer duration be in real time figures ? ( .262 ? )
If you have to spec a cam for mid range performance (1500rpm to 3000rpm ) what would you ask the cam modifier to do?

Tell the cam guys what you want your engine to do, your current setup and let them figure out a good profile. Those guys know a lot about cams and engines and how the cam will perform.

 

[RockDoc]

For forced induction with a carbed engine, you may want to check out this thread: https://forum.ih8mud.com/40-55-series-tech/188269-2f-turbo.html