Thread: Better than a 4BD1?

Thanks Dougal, I will look into it, is there anything else commonly available as a substitute in the garrett style flange as finding a 15b-ft manifold is near on impossible. I was going to copy the gasket and get a local firm to waterjet a plate out and make a simple log style manifold, using a t3 flange plate. Something like a Nissan skyline turbo. I don't want huge boost, just if im going to get it certified it may as well be done with a turbo fitted rather than have to cert again if its fitted later

Originally Posted by Dougal

JCB have some real animal diesels now. I saw a pump yesterday, 4.8L turbo 4 cylinder.
115kw at 1500rpm.

But the most interesting thing, JCB list flywheel inertia in their engine specs. I've long suspected the 4BD1 has the lightest flywheel in it's class by about half.

So today I got to see this JCB animal start up. Client of mine has installed two new pump motors. One a 4.8L JCB. The other a 4BG1T.

JCB: http://www.google.co.nz/url'sa=t&rct...75558745,d.dGc

Basic specs.
1500rpm governed speed (mechanical Stanadyne rotary pump same as JD diesels).
730Nm at 1500rpm to deliver 117kw.
Runs a lot of boost (should be over 20psi) from a Borg Warner Turbo.
A/F ratio around 25:1 at full load.
Intercooler and radiator side by side like the 300tdi.
Fuel injected max 160cc/1000 shots.
Exhaust is completely clean.
Intercooler return is cold.

4BG1T appears much quieter.
Costs about half as much.
Produces half the power at 1500rpm.
Comparable efficiency.
Turbo pipes look kind of small after staring at the JCB for an hour.