Thread: cummins B3.3t into Range Rover

They're a bit lighter than the popular Isuzu 4BD1, around 260 kg compared to 330 kg.

Should be doable so long as meets emission standards for 1990.
The Rangie will have a lower top speed and smaller engine than before so I would think if the conversion was tidy be engineerable.

I have often wondered why more haven't considered these as an option in Rovers as they appear to be a fairly robust bit of gear.

Thanks for the vote of confidence!
I'll take my idea's to an engineer and see what they say. Your right about them being robust, they use them in a lot of KOMATSU vehicles, and as my mate works as a plant mechanic for them, he reckons hes seen them in the worst conditions imaginable, and still working like new.
With a few simple mods such as an intercooler, exhaust, and simply winding up the fuel and rpm limit screws, people see 130-140hp out of them, and plenty of torque which matters most.

btw, sorry about the similar user name there. I signed up without looking at the site first and didn't realise it was so close to another users.
If i get this conversion done ill have to change to cumminsrover.

Originally Posted by rangierover

If i get this conversion done ill have to change to cumminsrover.

Careful with that one................ bit close to this topic:

NT driver crashed 'while having oral sex'

DL

Lots of great info here:
[ame=http://www.4btswaps.com/forum/showthread.php't=10176]3.9 and 3.3 pros and cons - Cummins 4BT & Diesel Conversions Forums[/ame]

I don't know if this helps. I have a naturally aspirated B3.3 in a 4 WD utility tractor. Great engine. mine is rated at 65 HP. I understnad the natrual can be tweeked up to about 80 HP. I talked with Cummins Corporate tech people and the local Cummins distributor. The stage I turbo, with no intercooler, is rated at 95 HP. They were about to come out with a Stage II intercooled 3.3 at 105 HP. I was quoted a price for a Stage I at $5,000, new in crate.

There are significant differences between the natural and turbo 3.3 (pistons and head design). Cummins corporate people did not recomend putting a Holset aftermarket turbo on the natually aspirated 3.3. They had no opinion about aftermarket brands of turbos.

Now, here is a fact the might spark controversy. The people at Cummins Corporation I spoke with referred to the 3.3 as "the Komatsu engine". Apparently, it was designed and built by Komatsu and Cummins distributes them under their brand. They carry the Cummins name plate, have a Cummins Corporation warranty, and are supported by Cummins parts chain and service departments. So, you can call it a "Cummins" or a "Komatsu". I personally don't care who built it or where, so long as it meets the specs for quality and is supported by Cummins. I know folks who feel strongly about "made in the USA" so I bring this up.

I am considering a B3.3 turbo for a 1987 Toyota Land Cruiser 60 series station wagon. There have been many converted to a 4BT. I have yet to meet anyone with a B3.3 in a 60 series.

...

To add to what BigBlueMotor & RocksandSand has already said, I have never seen a 3.3 that was rated for On-Highway use. All of them I have seen clearly state Non-Highway use.

If you have to deal with emissions or ever want to sell you rig, it may be a bigger issue than you think.

Originally Posted by rangierover

Thanks for the vote of confidence!
I'll take my idea's to an engineer and see what they say. Your right about them being robust, they use them in a lot of KOMATSU vehicles, and as my mate works as a plant mechanic for them, he reckons hes seen them in the worst conditions imaginable, and still working like new.
With a few simple mods such as an intercooler, exhaust, and simply winding up the fuel and rpm limit screws, people see 130-140hp out of them, and plenty of torque which matters most.

btw, sorry about the similar user name there. I signed up without looking at the site first and didn't realise it was so close to another users.
If i get this conversion done ill have to change to cumminsrover.

Don't worry about the similar user name. If I ever get in a heated thread you may get framed though

Have you looked at the torque curve of these things? Hope you don't intend to use an auto. So what do you have in mind for the drive line anyway?

Why go to all the trouble of a Cummins, when the 200 and 300tdi is a proven and easy conversion

Originally Posted by INDABA

Why go to all the trouble of a Cummins, when the 200 and 300tdi is a proven and easy conversion

Have you seen how many people on here are having top and bottom end problems with their X00Tdis???

I was actually considering an X00Tdi conversion, but have switched to a 4JB1T to improve reliability.

yes reason for the not so simple conversion will be reliability, should be an engine i can take to my next rover when this one is to far gone.

As for drive line, im currently installing maxidrive rear locker with maxi axles, arb front locker and will later install hi tuff axles in the front.

Transfer case i have a lt230 out of a earlier rangerover to go in when i get some spare time.
I am still undecided what gear box i will go, ill have to play it as i go along as to which one will fit best, im thinking about a GQ patrol box, otherwise probly just a manual rover box.

Does anyone know if the manuals out of the discovery's would be strong enough?