Thread: lets put an END to the MYTH!

Originally Posted by Dougal

With a 5th gear, you could still do that.

Mine has a theoretical top speed of 180+. I have no desire to test that out.

Gearing in my rangie is:
6th gear 0.626:1 (5th and 6th both OD)
T/case high range 1:1
Final drive 4.1:1

With 265/75R16 tryes the theoretical speed is 58.9 km/hr/1000 rpm. The 4BD1-T governor adjusted for max revs of 4400 per min.

I'm surprised people here are saying their rover V8 performance wasn't acceptable ,speaking from own experience , I've the heads ported on intake / exhaust , valve seats machined , new Valve springs , Standard Cam , extractors and a standard chipp and I am quite happy with the power and Torque of my 3.9L V8 , I couldn't ask for more , cept better fuel economy , but that's not why I got my V8 for

Originally Posted by dobbo

so where am i in this equation sitting on khan's knee wight knuckled in the pass seat, in the turdis being towed or at home worrying about my beloved brown box

You're not sitting in Khan's lap
Next thing you will want to drive
So that leaves the passenger seat.

Originally Posted by Bush65

Gearing in my rangie is:
6th gear 0.626:1 (5th and 6th both OD)
T/case high range 1:1
Final drive 4.1:1

With 265/75R16 tryes the theoretical speed is 58.9 km/hr/1000 rpm. The 4BD1-T governor adjusted for max revs of 4400 per min.

Testing the theory would be fun... Must be a few airstrips near you???

Interesting thread I have a 4BD1 T in a 120" running 35's with 3.54 diffs. It's quicker of the line and eats my mates Auto diesel gas 300 dti 97 disco in the hills. He has more top speed on the flats though as I have a fueling problem between 3200 and 3600 RPM

If your ever in my area you are welcome to see for your self

Give me a yell mate when you head out in your Defer next!

Originally Posted by Bush65

My current rangie has had 4 different engines. In chronological order they were/are:
1. original high comp V8 - tried cams, extractors etc., but performance was never acceptable.
2. 4.6 litre rover V8 - also had a cam recommended by JDM and extractoers but performance was still dissapointing.
3. 300Tdi with VNT turbo producing 22 psi boost, largish water to air intercooler, tuned injection pump - wanted diesel for long trips to remote areas, but performance towing into headwinds was not good enough.
4. Isuzu 3.9 litre 4BD1-T, which I pulled out of my bushie after fitting 6:1 ratio diffs (bushie will get a high reving light weight engine on lpg, after the rangie is back on the road).

I know that I don't need more than 4 cylinders. And despite what JC said earlier in this thread, no 300Tdi will get near the performance of this 4BD1-T at any part of the speed range .

Especially not your rocketship John! I was talking standard 4bd1T...

JC

I have just towed over 2t over Mt Vincent (the hill mentioned by Chief earlier in the thread) Freemans to Brunkerville I hit the Freemans roundabout exiting @ 70kph in 3rd gear, hit the governs and into 4 and foot to floor after roundabout, dropped back to 3rd just past the nudie camp, dropped back to 2nd at the steep section where it forms 2 lanes, crested in third and kept it in third all the way down.

Return trip, (no trailer full of horse jumps, poles, etc....)

Started of out of a driveway at Brunkerville 20m from the bottom of Mt Vincent, got to the governs in 3rd and switch to 4th at the Mt Vincent sign, held it till approx 200m away from the servo and switched back to 3rd to crest.


Personally I think this acceptable, slow but not sluggish. For the record the reason I was towing the trailer was the 3.0td Hilux used to tow it had to drop down to low range to crest the hill. I would like to see a 300tdi do the same task any easier