3FE in a fj40. What will be better? (1 Viewer)

[FJ40onNOS]

FJ40 rad should be ok. FJ40 rad cools a 2F just fine, FJ60 rad cools a 2F just fine, FJ60 rad cools a 3FE just fine, therefore FJ40 will cool a 3FE just fine.

The fan sits lower on a 3FE than on a 2F so you'll more than likely have to make a little adjustment to the fan shroud. A working fan clutch is key to keeping the 3FE temps in check.

sweet, im thinking of droping a MAF RV camshaft in when i do to built up, anyone put on in there 3FE or 2F and does it make more power then Stock, are there any draw backs?

so my 2F block will bolt to a 3FE head? i think im understanding all this.

 

[fj803fe]

so my 2F block will bolt to a 3FE head? i think im understanding all this.

Yep. They are more or less the same block design. Its all in the F man, all in the F. As such engine mounts are nodda problemo. 2F block will give better compression ratio-I believe

 

[CruisinGA]

3FE runs hotter than a 2F/F. FJ6X radiators are a good deal larger than 40 ones. I would either be certain your radiator is in good shape, or at least get it rodded (cored would not be a bad idea) by a radiator shop.

im looking into the same kinda swap in my 40, but what about cooling, is the 40 radiator, big enough for the 3fe, i know the 62 radiator is bigger. i have a rod throttle linkage on my 40 what does the 3fe have?

 

[cruiserbrett]

I am gathering parts to put my 3fe into a 72 FJ55. I dont think cooling will be an issue; The fan clutch and shroud are often overlooked in hot running FJ62's. They do run hotter, but thats by design, for emissions control reasons, not b/c the radiator is barely big enough.

My stock FJ62 was much faster than my F powered FJ55. Yeah the numbers are close, but the stock 3FE is going to be more driveable, and without a power sapping a440f behind it, it will definetly kick the crap out of a stock 2F.

 

[Pskhaat]

Sorry all, let me chime in here.

I do have a 3F-E in my 40, and yes it's taken me longer than expected. The week I got the engine we found out `we' were pregnant, 1 month thereafter I had to take another job in another state where I work ungodly # of hours. Anyway, long story short and another child on the way I have the 3FJ40 in a shop right now to do the last bits.

3F-E mounts right into the 40 against the H42 using the 2F's flywheel, no clearance problems except for one `ear' on the intake manifold that will interfere with the brake booster. The exhaust manifold DOES come darn close to the steering box and custom exhaust needs to be done. I've debated using the 2F's exhaust manifold against the 3F-E head and run the stock exhaust as that would be easiest. The water pump and thus the fan are offset to where they are on the 2F and will sit more starboard and the shroud needs modification. Wiring's a bitch as well as ``where the heck to I put the air filter canister?''-type questions.

The 3F-E does get higher HP, but at the expense of RPM's, it'll drive a little more like a car (or a 62 if you will). Mileage'll be no different no doubt.

I started that project because something needed to be done w/ the 2F and the 3F-E was the same cost for the most part. I wouldn't do it as an upgrade to a well-running 2F, only if the 2F really needed to be rebuilt or go.

 

[Trollhole]

Thanks for the information. The more I do research on this mod I have found that it probably better off going with the 3fe head and going with flattop pistons from a later model 40. That way I can get the best of two worlds.

 

[Pskhaat]

better off going with the 3fe head and going with flattop pistons from a later model 40. That way I can get the best of two worlds.

True, but you will need access to the latter-model 2f shortblock (but you already know that). I simply didn't have a valid shortblock anywhere near

Do the mod! && pictures.

 

[FJ40onNOS]

i have a 1980 Fj40, does it have the "latter-model 2f shortblock"

 

[FJ40onNOS]

and what kind of throttle linkage set up do you have?

 

[Pskhaat]

Hey good question! You need to convert to a throttle cable instead of the carb linkage. Not too bad, but a non-trivial task.

 

[Godwin]

i have a 1980 Fj40, does it have the "latter-model 2f shortblock"

Yes, with the holes tapped for the power steering pump. I don't remember when the change from domed to flat top pistons came about, but you can always swap pistons around.

 

[Godwin]

Hey good question! You need to convert to a throttle cable instead of the carb linkage. Not too bad, but a non-trivial task.

Snag the throttle cable for the 3FE so that you will know that it at least works on one end. When I stuck the 3FE into my FJ60 I had to take parts from both the FJ62 and FJ60 gas pedals to come up a solution. You would think an FJ62 pedal would stand a good chance of being a straight bolt in to an FJ60. On a 40 you'll have to drill through the firewall to route the cable into the cab.

 

[FJ40onNOS]

Snag the throttle cable for the 3FE so that you will know that it at least works on one end. When I stuck the 3FE into my FJ60 I had to take parts from both the FJ62 and FJ60 gas pedals to come up a solution. You would think an FJ62 pedal would stand a good chance of being a straight bolt in to an FJ60. On a 40 you'll have to drill through the firewall to route the cable into the cab.

not a big deal, man i cant wait to get this started!

 

[FJ40onNOS]

well guys i did it, i took her for her last drive tonight, smoked so much, im going to miss driving my cruiser but it will be worth it in the end. im going to get the 3fe some time this week, ill let you guys know how it goes and post pics as i go. i thinking while im building it up im going to put in a MAF RV camshaft and High Compression Pistons but will thoughs pistons work with the 3FE head?

 

[Advent]

I thought of something today. Has anyone put a 3FE or 3FE head into an FJ40 and managed to keep the PTO driveshaft for a winch? It seems that with the dual output manifold, and dual cats, there wouldn't be room.

 

[Pskhaat]

I don't have PTO, but I imagine if you used the 2F's exhaust manifold (which should be perfectly possible) this would eleviate the problems.

Also, cats generally aren't req'd for the pre 79 years on the 40s anyway...

 

[Advent]

If I do this, I need the entire emissions system for the 3FE. It would have to pass the requirements for whatever it came out of.

I'd never pass a '90 engine with a 2F header/manifold and no cats.

 

[Pskhaat]

Both emissions States in which I've resided AZ/CO go off the frame year not the engine year during emissions testing. CO was brutally hard to pass too.

 

[FJ40onNOS]

my 40 with be 25 so its only a safey inspec

 

[FJ40onNOS]

well im getting the motor ready to be pulled, is it better to leave the tranny and tcase on of off? ill get a few pics tomr!