Header for 2F engine. What are some good mods to make more hp and tq with this engine? Thanks for any info (12 Viewers)

[ratman1]

Just got an fj40 given to me. Want to go thru it mechanically and make some more hp. Who knows these and sells perf parts for them? Thanks for any info.

 

[charliemeyer007]

Building a racing tractor? A header, carb, and distributor will help. Buy and put them on when the OEM poops out. A 4, 5, or 6 speed tanny maybe a 3:1 or 4:1 transfer case. Perhaps a 4.88 or 5 something pumpkins. I have no use for fuel injection or automatic transmissions - although I did like the Allison 6 speed in a big uhaul many years ago.

A 383 stroker was a popular Chevota option.

 

[sogncab]

Different engine is the easiest way to add HP if that's the goal

 

[1911]

The 2F engine was designed to make useable torque at low rpm, it makes 80% of its rated torque not far above idle rpm. Great for for four-wheeling, its intended purpose. With enough time and money, you can increase hp but it's an uphill battle from the start with flat-tappet inline six. As has been suggested, an LS or other small-block chevy swap is the way to go (in my opinion) if you must have more hp.

 

[POPO AGIE]

I took all the emissions equipment out, plugged the air injector ports, put a Rochester carb and header on my 2F and changed the distributer to a different year. Could not tell the difference by the seat of the pants. When I had to swap to the 155F and kept all the mods that I had for the 2F and bolted them to the 155F including the clutch and flywheel and could not tell any difference. It ran and that was important.

The header leaked a lot and needed to replace burned out gaskets when adjusting the valves did not reduce the clicking sound.

Now I have a Cummins in front of the H55F and split transfer case. It is still not ready to drive so cant say what difference there is yet.

 

[POPO AGIE]

Building a racing tractor? A header, carb, and distributor will help. Buy and put them on when the OEM poops out. A 4, 5, or 6 speed tanny maybe a 3:1 or 4:1 transfer case. Perhaps a 4.88 or 5 something pumpkins. I have no use for fuel injection or automatic transmissions - although I did like the Allison 6 speed in a big uhaul many years ago.

A 383 stroker was a popular Chevota option.

I had a SB given to me to build with a stroker kit but did not like the options at the time to convert and heard about the transfer case housing breaking and saw the first broken Birfield outer sitting on a counter that was sheared all from a Chevy 400 making 400hp supposedly.

Then started looking at diesel with more torque but lower horse power gains.

 

[76FJ40]

Mill the head to increase compression. I milled the head on my '76 by 0.08" and it made a noticeable improvement even my wife could feel. The only downside was I had to use 89 octane.

 

[POPO AGIE]

Mill the head to increase compression. I milled the head on my '76 by 0.08" and it made a noticeable improvement even my wife could feel.

When mine needed a valve job I had the head milled and the shop said they milled it 0.050" and ran fine at 6200' and above but when took it up to Portland, OR and it lasted a year and I put the biggest jets I could get for the Rochester carb and got not keep it from knocking and was pulling the cock knob in and out to control the knock.

Then ended up with a 155F to get back to Wyoming.

 

[charliemeyer007]

I hit the lootery I'm building a 283 Vet engine - I like RPM's. Likely go the Porsche and Ferrari factory too.

One of my college buddies hand built the 383 and used the Ranger Overdrive as the adapter to his 4 speed - he was very happy with the results.

 

[ceylonfj40nut]

Engines. Many options. Easy/Simple is a chevy 350 carbed. Mine has one behind a 3 spd on the floor. Its wicked. Does 80 mph all day! Love Toyota engines. But this one gets my grubby hands over them most days.

 

[peesalot]

" I have no use for fuel injection " and I slice bread with a rock.