Bombing a 4BT

[Crash_AF]

Hi all,

After some discussion with the local diesel house and a couple of members of the list, I think I have a good idea of what I need to replace on my 'cooked' Cummins. Now I need to know what to look for in the way of bombs to get a little more power out of it since I'm going to be replacing the turbo and having the pump rebuilt.



That said, what injectors can I use in the engine? Will second gen injectors fit in a first gen engine and work with the VE pump?



I'm thinking of picking up a used HX-35 to replace the stock turbo but want to know how big of an injector to go with? Anyone have any thoughts?



Thanks for the info...



Later,

Joe H

 

[formula]

I had a look at a 4BT in a jeep at Muncie this year. The injector pump appeared to have similar adjustments to those on our trucks. Not sure if it uses the same type of injectors as the 6BT. If it does, then there are some things you should be aware of. The injectors from a 2nd gen are not a direct swap but can be modified to work. To do this, you will need to swap the injector nozzles onto the bodies of your injectors and make the necessary adjustments to the pop pressure, etc. The injectors from a 24v cannot be used at all as they are a completely different design. If they'll fit, a set of POD injectors would probably work nicely



Given that the 4BT is 50% smaller displacement than the 6BT, an HX35 would likely be too big of a turbo, even with a 12cm turbine housing. A HY35/9cm may work better.



Sean