6bt fj40 pic requests????

[69rambler]

That shows that loud and shaky are subjective.

"very quiet"? Come on.

A '93 cummins makes a '93 6.5 GM td sound like a Honda Civic.

The closest thing I can think of to compare the sound of a 6.5 GM to is a washing machine with a failing, noisy transmission.

Is that the quieter sound you're thinking of?

I don't recall any 6.5 GM being especially quiet. A good friend made a lot of money keeping those engines on the road for folks. I used to see a lot of them. I don't notice many on the road anymore. Lots of the gas versions of those trucks still going strong. Strange.

He has one he still drives. It has the non-GM block, non-GM crank, non-GM decompressed pistons and the water passages in the big cup heads are all cracked and sleeve repaired. It runs a lot of timing to make power. It clacks something awful. Sounds like a washing machine with a bad tranny running next to a cement mixer spinning full of bolts. He hopes to get a year or two more from this engine than he averaged with the 11 some odd other GM based 6.2 and 6.5 engines he's had in the truck.

The funny part to me is now that he has a more "reliable" 6.5 he's lost the fuel economy the engine used to have with the decompressed pistons. The engine makes good power, but gets 15 instead of 18-20 now.

My old 5.9 gets about 21 MPG average. Has plenty of power when the pickup is empty most of the time and has done well hauling some heavy loads over the past few years. The Dodge is a POS, but I couldn't reasonably ask for anything more out of the engine. I'm too happy with how it performs.

 

[Kief]

A lot of the quiet factor in diesels is the adjustment and tuning of the motor, aftercooler/intercooler, mounts, intake(which generates a lot of noise) and exhaust treatment, insulation and sound deadening-
It was very fatiguing to drive in my stock 1F powered 67 'cruiser over any distance, especially with the 3 speed but with the top removed it wasn't so bad. Of course I had no insulation just a token floor mat. The 1fZ is extremely smooth and quiet in comparison. I rode in a 40 with a 6AT and no insulation and it was not something I would have cared to drive a long distance without some sound/vibration treatments.
Pick your flavor, if you don't like it, someone else probably will if its well put together.

 

[Enigma]

I rode in a 45 once that had a 2 stroke detroit in it.....now that was loud.

 

[Fast Eddy]

I don't recall any 6.5 GM being especially quiet. A good friend made a lot of money keeping those engines on the road for folks. I used to see a lot of them. I don't notice many on the road anymore. Lots of the gas versions of those trucks still going strong. Strange.

He has one he still drives. It has the non-GM block, non-GM crank, non-GM decompressed pistons and the water passages in the big cup heads are all cracked and sleeve repaired. It runs a lot of timing to make power.

Mine is all original, 200+ kmi, runs fine, never had any problems with it. It's got slightly turned up fuel injection, banks exhaust, a waste-gate mod and an intercooler. Not fast like a modern diesel, but it makes 200hp. It's fast enough for my old dually. It'll spin the duals if I really try. I bought it new. Most reliable vehicle I've ever had. I've never gotten really great mileage out of it. 14-15 is pretty good. It doesn't really drop much when towing. I pull my '40 over the sierra's and still get 13.

It may not be "quiet". I never said it was, but it's not a tractor motor like a cummins.

 

[69rambler]

Mine is all original, 200+ kmi, runs fine, never had any problems with it. It's got slightly turned up fuel injection, banks exhaust, a waste-gate mod and an intercooler. Not fast like a modern diesel, but it makes 200hp. It's fast enough for my old dually. It'll spin the duals if I really try. I bought it new. Most reliable vehicle I've ever had. I've never gotten really great mileage out of it. 14-15 is pretty good. It doesn't really drop much when towing. I pull my '40 over the sierra's and still get 13.

It may not be "quiet". I never said it was, but it's not a tractor motor like a cummins.

The GM heads were application specific. If you bought a dually then you got the engine with the big precup heads. The larger precups will be more efficient at moderate load whereas the smaller precups will lose economy drastically with load, but do better at light load.

The blocks fatigue and crack up from the main bolts through the main web of the block. They can be cracked pretty bad and still run until a part of the blocks cracks away from the rest or the crank breaks or a combination of both. I have seen running engines with the heads and oil pan holding the two halves of the block together.

It's unusual to find a 6.2/6.5 block without both main web cracks and cracked heads.

 

[Behemoth60]

Are we still talking about 6BT's. They are so... old...
I am undertaking a project in my 70 series with a 2005 ISB engine. More wires.. yes.. 11 wires to figure out. Most of them are power to the accessores. The complicated bit is the fly by wire throttle, for sure, but it's not THAT complicated. The computers make them a way better engine... they are much more powerful, quieter, smoother, cleaner, more powerful, start better in the cold, and they are much more powerful, and more powerful, and also, they are much more powerful. The CRD ISB's are 10 years old now... it's not like this is cutting edge stuff.... 6BT's, they are dead to me.

 

[dohcdelsol93]

i caved on the 6bt idea, picking up a 4bd2tc this weekend.

It's new compared to my fj40, and being out of a 94 it will be the newest motor i've ever owned that pushes 4 wheels.

 

[Fast Eddy]

That should work out pretty well.

 

[Awl_TEQ]

Are we still talking about 6BT's. They are so... old...
I am undertaking a project ...QUOTE]

Let me interject.... we are undertaking.

Peter, I was going to corner you and discuss several ideas I have about my 45 build, my 42 upgrades and a possible aluminum M101 trailer build I am contemplating. We need to talk.

 

[DWitcher]

Are we still talking about 6BT's. They are so... old...
I am undertaking a project in my 70 series with a 2005 ISB engine. More wires.. yes.. 11 wires to figure out. Most of them are power to the accessores. The complicated bit is the fly by wire throttle, for sure, but it's not THAT complicated. The computers make them a way better engine... they are much more powerful, quieter, smoother, cleaner, more powerful, start better in the cold, and they are much more powerful, and more powerful, and also, they are much more powerful. The CRD ISB's are 10 years old now... it's not like this is cutting edge stuff.... 6BT's, they are dead to me.

So much for simplicity eh?

 

[Awl_TEQ]

The ISB engines are no more complicated than the EDIC on a 3B once you dig into it. If you get the throttle pedal from the donor vehicle you can plug and play.

 

[69rambler]

The commonrails aren't complicated. They are different from the mechanical engines and the VP engines, but not entirely better or worse.

The best part is that they all fit in the same place and there's a large supply of donor Dodges not worth fixing.

 

[69rambler]

8 days ago, in this thread, I mentioned a friend's super dooper mega turbo encabulator 6.5.

I just got a phone call from him that his spectacular no-buck spared non-GM block, scat crank, coated aftermarket decompressed piston, special cam, yada, yada 6.5 has developed an unhappy deep knock.

He said he's officially done with those engines. He's removing the engine and not going to even open it up to see what happened. He's not surprised and not disappointed, in fact we were both laughing pretty good about it.

This is from a guy who's been intimate with the 6.2/6.5 engines since the early 80's.

 

[TCinVA]

I had a 6.5 turbo in a '94 C3500HD dump truck. I bought it with around 100k on it. At 115k it needed an injector pump that was year specific and kept me down for 3 weeks, then at 120k it got such bad blowby, I junked it. Not a big fan.

 

[Tackleberry]

i spent a great deal of time working with fj40s and cummins. Ive got a 4bt in mine with a th400 automatic trans and i had a nv4500hd 5speed manual before. believe me when i say a 4bt is plenty for a fj40. I dont have much in modifications to mine other than a different turbo and mine is plenty powerful.
The only reason to use a 6bt over a v8 is for cheaper torque. But honestly if you need a 6bt to tow somethings then your towing too much to be safe in a fj40. If you want to build it to be cool and wicked, then by all means turn the fuel up and burn the coal!!!!

So you have 4bt-th400.....?
I'm doing my swap this week and really would like your fuel mileage input.
my set up is, 4bt-th400-3spd xfer 4.10 thirds-and 33"tires. Might go up to 36 if the power is right.?

 

[GLTHFJ60]

So you have 4bt-th400.....?
I'm doing my swap this week and really would like your fuel mileage input.
my set up is, 4bt-th400-3spd xfer 4.10 thirds-and 33"tires. Might go up to 36 if the power is right.?

I don't think he's put enough miles on that th400 setup yet to have to fill it up, lol

 

[Tackleberry]

Darn.

 

[1974FJ]

I'll take a look over the weekend. I'll be driving around a good bit with the hard top off. It gets incredible mileage non the less. The power is plentiful

 

[ChadsAATrans]

 

[ChadsAATrans]

Those are some pix of my 75 fj40 with a first gen 6bt being installed, about 75% done!