Thread: 4BD1 performance

Dougal, I am 99.9% sure that all counties with 3.9D/LT85/LT230 had 1.003:1 high range.

Originally Posted by Brian Hjelm

One wonders which direction they worked out the ratio as 1.003 is the repricrocal of 0.996 (1.004-0.997).

No worries. Not quite sure what you mean about "which way they worked out the ratios". AFAIK the tooth counts are:

Input 26 Intermediate in/out 41/45 high range 26

The 26/41 is the same for all t-cases. Someone did tell me once that there were two different 1.003:1 ratios (tooth counts), but NFI if that is true...

anyway, 1.003 was an already existing ratio for TF727 rangies. Just as the 0.996 LT230 ratio already existed for high compression 4-speed rangies. I very much doubt there would have been a special, extra ratio made for the county that was only 0.7% different from an existing ratio.

Petty right, mine gets ringed 1. to get the next gearchange, 2. cause it was half glazed and blue smokey, with blowby, seems to have improved a fair bit after 14,oookays of towing and flogging

Why do you think he calls himself 'ROVERCARE' for C'ssake!!!.

Originally Posted by 1103.9TDI

Why do you think he calls himself 'ROVERCARE' for C'ssake!!!.

Because I've built more Rovers than you've owned

EDIT:

Oh and there is 2 ways to fix a glazed diesel, 1. pull it down and hone the bores, 2. load crap out of it and flog it

Which option you think I've chosen?

Oh and while we're on it, If I lunch a legendary Isuzu, especially when I boost and fuel **** out of it, I'll just rebuild it and continue on

Lets just say, I'm conducting a 4BD1 endurance test.....................................the hard way

Originally Posted by rovercare

Because I've built more Rovers than you've owned

EDIT:

Oh and there is 2 ways to fix a glazed diesel, 1. pull it down and hone the bores, 2. load crap out of it and flog it

Which option you think I've chosen?

Oh and while we're on it, If I lunch a legendary Isuzu, especially when I boost and fuel **** out of it, I'll just rebuild it and continue on

Lets just say, I'm conducting a 4BD1 endurance test.....................................the hard way

And when will this be happening? Just curious to see your results

Originally Posted by Vern

And when will this be happening? Just curious to see your results

Last year, not long after I bought it

It seems to stay on the back of the list, just got back from Round 1 Engel and there is alot of work to be done on mates car, now they're keen to go to Round 2 in Cooma

Originally Posted by rovercare

Last year, not long after I bought it

It seems to stay on the back of the list, just got back from Round 1 Engel and there is alot of work to be done on mates car, now they're keen to go to Round 2 in Cooma

Need any bits?

Asking about your 4db1 because the other day when i was following you it didn't seem to go to bad for a non turbo, yes i could have caught you quite easily in the disco but i drive very sedately with the family in the car. I just think with the turbo, intercooler and pump mods they'd go quite well, so what i'm trying to say is hurry up and do it so i can take it for a spin

Originally Posted by 1103.9TDI

Why do you think he calls himself 'ROVERCARE' for C'ssake!!!.

That reminds me, I must apologise to JC for reaching the fuel governor on his 4BD1 when I got a spin the other day

I really gotta get my turbo and intercooler on now after driving that

Ah so you liked it a little then