Thread: lets put an END to the MYTH!

Originally Posted by isuzurover

To end this, how about some 300Tdi owners and 4BD1T owners do acceleration tests themselves and post up the results.

Engine. Time 0-100. Vehicle type. Tyres. Gearing.

Okay, I'll bite.
4BD1T (1985-6 truck version).
85 Rangerover, 29" tyres, 2.3T empty.
15-16 seconds for 0-100, runs an Isuzu 5 speed box with a 1:1 LT230. Would be much faster 0-100 with an auto.

Originally Posted by Dougal

The strength limits of the 4BD1T haven't been found yet.
We have a guy who's popped head gaskets with 60+ psi boost. AFAIK he replaced the head gasket and is still driving it.

The bottlenecks are:
1. Stock fuel pump seems to be good for only 140 cc/1000 shots of diesel.
2. Getting enough boost to burn that cleanly.

140cc/1000 shots of diesel burnt cleanly at 3200rpm is going to give almost 200kw.
You need north of 30psi and a very good intercooler to get enough air in at that rpm.

For your info:
My IP was sent to a shop for a tune up.

On the test bench, with governor removed and rack adjusted by hand, it delivered 180cc/1000 strokes.

With governor back on it could only deliver 170cc/1000 strokes. But profile of torque cam could be modified to get 180cc/1000 strokes.

My P&B's are 9.5. It looks like 10.5 P&B's as used in the 4HG1-T IP will fit - waiting for price.

I have asked for 200cc/1000 strokes. I think I will have enough air, so should perform ok.

Originally Posted by cal415

Funny you should mention that, i was reading on a Commodore forum about people playing with turbo kits and the new V6s pushing figures around that

I wonder how that would go in a bush rangie???

And a 4 speed Atlas - not too scruffy

Originally Posted by Bush65

For your info:
My IP was sent to a shop for a tune up.

On the test bench, with governor removed and rack adjusted by hand, it delivered 180cc/1000 strokes.

With governor back on it could only deliver 170cc/1000 strokes. But profile of torque cam could be modified to get 180cc/1000 strokes.

My P&B's are 9.5. It looks like 10.5 P&B's as used in the 4HG1-T IP will fit - waiting for price.

I have asked for 200cc/1000 strokes. I think I will have enough air, so should perform ok.

Excellent. It was Carcrafter who had his pump measured at 140cc. I don't know what element size he had.
Mine has the 10mm elements, looks like I'll never run out of adjustment.

Any more progress with the intercooler and compound? I want to see how you're going to fit it all in.

Originally Posted by isuzurover

Couldn't vibrate any more than a 2.25D!!!

To end this, how about some 300Tdi owners and 4BD1T owners do acceleration tests themselves and post up the results.

Engine. Time 0-100. Vehicle type. Tyres. Gearing.

can I do mine down hill......

in all seriousness it will mean nothing!!! unless your all doing it on the same bit of road

mt vincentis the rd chief speaks of 7min drive from my place i can pull up in 4th 2/3 of the way up with a bit of tuning i think i could pull it in 4th, mine is an na 4bd1 lt95

A 4bd1t would eat that hill

try bulli pass, kangaroo valley or some of the snowy mountain hills in your 300tdi

Originally Posted by Dougal

Excellent. It was Carcrafter who had his pump measured at 140cc. I don't know what element size he had.
Mine has the 10mm elements, looks like I'll never run out of adjustment.

Any more progress with the intercooler and compound? I want to see how you're going to fit it all in.

I think Randy may have had 8.5 elements (now 10).

I have started on an exhaust manifold and want the HP compressor located before doing much more on the intercooler (short pipe across rocker cover between compressor and IC).

Originally Posted by dobbo

mt vincentis the rd chief speaks of 7min drive from my place i can pull up in 4th 2/3 of the way up with a bit of tuning i think i could pull it in 4th, mine is an na 4bd1 lt95

A 4bd1t would eat that hill

try bulli pass, kangaroo valley or some of the snowy mountain hills in your 300tdi

Had chief accepted the challenge, I was going to suggest I tow the turdis, and he tow any small car of his liking, up Thunderbolts Way. I could have a nice lunch at Walca while he catches up