...Continued

Motor mounts were a breeze. had to lower the engine an inch and raise tranny an inch at it's mount.

After a few removals and hachet jobs the oil pan cleared the 4WD third member.

And now the video.

http://www.youtube.com/watch?v=uV903Ai7Uhg

It got 26 MPG and ran great! Only problem was it vibrated too bad at idle to the point it chattered your teeth like Shaggy getting scared by a ghost. If I were to do it again it would get a 5.9

It was a complex swap so I'm happy with a 6.2/6.5 because it makes swapping easier.

Enjoy,

Chase

 

Nice work. So is the vibration typical for the 4BT, or are you just lucky, or is something else going on?

 

Thanks!

...and YES! These 4BT's vibrate. One way to remedy it is to use liquid mounts that comes in some stepvans. I couldn't use them because the frame is too narrow. That's why I mentioned just going with a 5.9 because they are naturally smooth because of inline 6.

4BTAA vibrates less!

26 mpg though....that's sweet! How is the power compared to the 350?

Performance was almost same off line but the 350 would have walked away even if a higher rpm governor spring was swapped in. The only mods was a fuel pin and H1C turbo and pump turned up 10%.

Awesome build!!

Thanks!

 

4BTAA vibrates less!

26 mpg though....that's sweet! How is the power compared to the 350?

 

Awesome build!!

 

HOLY COW ! that kind of mileage is pretty nice for a suburban !
I wish have one of these 4bt for my jeep willys

 

I just picked up one of those 4bts out of a step van, has GM 72 up style mounts, looks like you had solid mounts? Thinking i might sell mine

 

Its so easy to get some extra power out of the 4bt.
Injectors that add 40HP are about $200 and you can get a fuel pin and governor spring to add 40HP and 500RPM for under $150.

the cummins will then easily outrun a 350, and have as much torque as a lot of 454cu in

Also get a fluidampr to reduce the vibration.

 

Do you think this would do a 6.5 1 ton any justice? My 6.5 is running on its last few thousand miles. Would a 4L80E mount up to a 4bt?? I barely scrape by with 13 mpg as it is.

 

The power would be mediocre. The vibrations would drive you crazy!

Personally, I would stick with the 6.5 and upgrade to a steel crank from Peninsular diesel, 18-1 pistons and an updated block.

Your 4L80E will mount up if you have the trans adapter in the pic shown. Or a trans adapter from destroked will work better, you just have to use a 6.0 powerstroke starter and the billet flexplate it comes with. The destroked set up will set you back $1,400 dollars which is one of the reasons i would stick with a 6.5 and build it up.

Or if you have to have a Cummins then do a 5.9 swap but it'll take you a while!

 

Honestly, you could probably find a decent 6BT for less than a 4BT. And if you work the 1-ton, you'd be better off with the 2 extra cylinders.

 

Definitely a 6BT next time.

 

I do not know how the new ISB's vibrate.

I tried a 6BT balancer on the 4BT and did nothing at all to improve the vibrations.

fluid mounts do alot to isolate the vibes. I don't remember which step van model they come in but on wider frame vehicles like a dodge or Ford, they can be used and it's a day and night difference.

4BT's do come in Ford F250 in South America

http://www.ford.com.br/showroom.asp?veiculo=19&secao=3

 

alot of people ask me why a 6.5 over a 4bt or a psd.


i drive a min of 35k a year, and well over 60 yr the last two.

i test drove a 2wd gm with a 4bt swap, it was a 1000 bux and really seemed like i was gonna score big.

didnt take long to figure out fuel was gonna have to get real expensive before i was gonna put up with that thing.

 

I have a 4-cylinder cummins A-series in my wrangler, it also vibrates like mad and breaks bolts now and then. The key is in the rubber engine mounts. Use a soft enough rubber, and it will help get rid of the teeth chattering rattles...

I friend of mine has a 4bt in his GMC Yukon, and it idles like the thing did from the factory. Having soft enough engine mounts makes a world of a difference on a diesel. Poly is not the way to go...

 

Very nice. I might put one in my CJ-7.