IDI Swap

[WyoBronc11]

How much bigger is an 6.9 IDI than a 351W? Just curious since I can pickup a 6.9 idi cheaper than a 4bt or 4bd

 

[KyleQ]

I like the idea, lots of torque down stupid low. I dont know the exact sizes, but they are smaller than a 460. There is no difference in pickup size for motors - F150s can take inline sixes all the way up to a 460, so it should fit.

I've not seen one done, but it would be a great wheeling motor besides the massive weight...

 

[broncnaz]

The 6.9/7.3 basically the same size real tight fit it has been done is it worth it probably not worth the overall effort when you really get down to the basics. Your also looking at about 900 lbs of engine vs less than 500 for the gas V8. the 4bt is more than enough and fits a little better but it still fills the engine bay.

 

[jlewan001]

A 6.9 weighs about 950lbs, around 100lbs more than a 4BT. Since it's a V8 it is much wider than the 4bt. My 4bt hangs way down and touches the front axle on my bronco, even with the 3 inch lift.

It would be exremely tough to fit a 6.9 in a Bronco, but it could be done I think. I would say to go with the the 351W though. Just my advice after spending 2 years messing around with a Bronco diesel conversion.