Thread: Isuzu to various models?

Originally Posted by land864

Maybe a turbo is not worth the work?

Pete

Surely you jest? A turbo is always worth the work.

Originally Posted by Dougal

Surely you jest? A turbo is always worth the work.

x2.

Without bothering with the expense of a dyno, find a flat road and test your 0-100 times. There are a few threads on here where people have posted 0-100 times for 4BD1Ts.

Originally Posted by Dougal

Weight of the 4BD1, ASTR on 4BTswaps weighed a US truck version around 360kg (785 lb).

Torque.
NA around 280 Nm
10psi boost around 310Nm
15psi boost around 340Nm
15psi intercooled around 410 Nm
20psi intercooled around 470 Nm

These figures are conservative, based on 60% efficient turbo and 20:1 A/R ratios.
You can get significantly more by running hotter EGT's, more efficient turbos and better intercooling. The truck motors will top out around 600Nm which needs a little over 25psi on an efficient turbo and a good intercooler.
I have around 530Nm on 20psi boost with no intercooler. EGT's are rather hot so it needs baby-sat while towing.

The factory turbo truck motors have bigger elements in their injector pumps so they inject diesel in a shorter time-frame. The result is a cleaner burn, slightly more power and lower egt's than the NA motors will provide on the same fuel volume.

I see no reason to keep the gas.

According to factory isuzu workshop manual aussie spec, NA motors weigh 320kg, turbo motors 330kg

Originally Posted by isuzurover

About the same width as an RRC rad but a few inches taller.

RRC rads are about 4" wider than the Landy and of course not as tall.
I measured the landy frontal area and a HQ Holden rad fits in nicely, different mounts obviously. You can get a 4 row core for the HQ rad, just get the correct outlets put in the tanks and Bobs yer uncle!