My county is better than your puma

a bit noisier? yeah sure, in the same way that the space shuttle launch is a bit noisier than a glider.

The Isuzu 4BD1 (and varients there of) were fitted mainly (in the landrover world) to the county and perentie. If driven nice they match the tdi300 for economy and in stock form beat out the tdi's at the bottom end of the rev range and in durability. Typically tho the suzi drinks about 1-2l/100K more than the tdi300. The performance of the turbo version varies depending on which turbo and fuel pump combination you have but generally its more powerfull across the range and drinks the fuel to match it if you put the boot in but again with good driving you can get it back to tdi like figures for fuel consumption.

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Originally Posted by Blknight.aus

a bit noisier? yeah sure, in the same way that the space shuttle launch is a bit noisier than a glider.

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There is a post around some where? Where some one put a Db meter in an Isuzu and then a 300tdi, the difference was negligible. The vast majority can’t tell the difference between an Isuzu and a 300tdi unless told, this includes LR mechanics.

I think that in the latter model defenders, TD5 etc do have some or much better insulation compared to a couple of patches of waste cotton and a bit of carpet on the floor.

personally, after having owned both Isuzu and a 300tdi there is very little difference noise wise. drivability with the Isuzu is way ahead of the 300 tdi. Large sand dunes are a problem for an Isuzu but that’s all.
The only shake noise problem I would say is idle when cold, there seems to be no high idle for a cold motor. The way the motor can shake about can be alarming, but this is easily fixed by turning up the idle or fitting a manual throttle, which is a good move.

I've posted this before somewhere too, but honestly at 100km/h with the same BFG mudders I was running with the V8, there is very little extra noise now with the 4BD1. Of course the gearing is a little higher but still, I am not at all unhappy with the changeover in all aspects.

Turbo and 15psi boost helps in soft sand...:twisted:


JC

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Originally Posted by Blknight.aus

<snip>
because....

My engines important bits are made from metal and not plastic, little things, like the oil filter.

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And the inlet manifold :eek:

(Yes, I'm aware I'm posting from the wrong side of the fence :) )

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Originally Posted by justinc

I've posted this before somewhere too, but honestly at 100km/h with the same BFG mudders I was running with the V8, there is very little extra noise now with the 4BD1. Of course the gearing is a little higher but still, I am not at all unhappy with the changeover in all aspects.

Turbo and 15psi boost helps in soft sand...:twisted:


JC

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I bought myself one of these a few months ago

https://www.aulro.com/afvb/images/im...010/06/573.jpg

I started to do all sorts of tests, wrote them down & promptly lost the note.
One stastic I do recall is that the Isuzu @ 100klm/hr was as noisy/ quiet? as my commodore with the radio at a level I need to hear OK.
The other was the Isuzu was noisier at Idle than 80klm/hr.
I might take it to the Vic AULRO show & shine next weekend & con some into going for a drive in thier Landies, as my Isuzu has sound insulation.

where puma owners are starting to ask if their landy will be around in 15-20 years time. series and suzi owners are asking if theirs will be round in another 15-20 years time.

Isuzu owners wonder whether their vehicle will still be driving after said owner has departed life. Rijidij proves this it is a distinct possibility:
http://www.aulro.com/afvb/isuzu-land...nty-twist.html

On the noise topic, I have an 89 model and seems much quiter than the ealier 4BD1's. Even quieter than a 300 tdi. What are the differences? If you dont belive me ask rovercare, he has driven it.

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Originally Posted by Rangier Rover

On the noise topic, I have an 89 model and seems much quiter than the ealier 4BD1's. Even quieter than a 300 tdi. What are the differences? If you dont belive me ask rovercare, he has driven it.

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Yep, same with my '88, and significantly more quiet than my '85 was.
http://www.aulro.com/afvb/technical-...und-check.html

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Originally Posted by Rangier Rover

On the noise topic, I have an 89 model and seems much quiter than the ealier 4BD1's. Even quieter than a 300 tdi. What are the differences? If you dont belive me ask rovercare, he has driven it.

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There was talk around that time of Isuzu having "close clearance" diesels. It sounds like they better fitted their liners to pistons than others at the time.
Obviously the truck engines got this sooner than the industrial engines.

The quietest my Isuzu has ever been was when it was rebuilt with cast liners which were bored to each piston. Unfortunately it had an air-cleaner element which didn't fit so that rebuild didn't last.