Thread: 4J engine tech - and a crazy idea!

Originally Posted by rick130

Damn.

I thought I'd found my near perfect Tdi replacement

ATM I just can't get my head around the extra 140kg and torque pulses of the 4BD1T.

As Steve/roverrescue keeps saying, I'll be running around in a Tdi powered Deefer for years to come....

I wouldn't write them off yet Rick. Don't seem louder than a Tdi. As for power and fuel consumption, you won't find anything as economical as your existing engine... (but do you always want to go that slow!)
[ame=http://www.youtube.com/watch?v=ApbxrBqgNDA]3000[/ame]
[ame=http://www.youtube.com/watch?v=yMEBftnjBWo][ Test Run ] Quick Shift 4JH1 By T.S.Project - YouTube[/ame]

There must be someone local with one of these who can give you a test drive?
http://www.isuzu.co.nz/media/1915/NK...20Aug%2005.pdf

Originally Posted by isuzurover

I wouldn't write them off yet Rick. Don't seem louder than a Tdi. As for power and fuel consumption, you won't find anything as economical as your existing engine... (but do you always want to go that slow!)


There must be someone local with one of these who can give you a test drive?
http://www.isuzu.co.nz/media/1915/NK...20Aug%2005.pdf

Considering how much fuel I'm dumping through mine at idle and full load, it blows me away how little fuel I actually use overall

For all its faults, a Tdi is bloody efficient.

If Land Rover had a bit more money for development and had've released a 3 litre version, I doubt most of us would go looking for an alternative.

More likely be a Rodeo around with the 4JH1, not too many small pantechs around here Ben.
I live in Upper Cumbucta West remember

Yes the Tdi is efficient. I get about 8L/100 in the disco!!! (300tdi manual).

However a lot of that is down to the fact it is small and gutless... The isuzu (4BD1) has a better BSFC AFAIK.

I think a 3L or 3.5L version of the TD5 (but with manual injection) would have been the ideal LR engine.

Are there any BSFC figures for the 200/300tdi?

The 4BD1T isn't amazing at best point, easily beaten by the likes of VW's 1.9tdi. But compare rated power to rated power and the Isuzu wins.

Has any one fitted the isuzu 3.1 ie the 4jg2t in a land rover if so could you please give some feed back thanks

Originally Posted by martyn jones

Has any one fitted the isuzu 3.1 ie the 4jg2t in a land rover if so could you please give some feed back thanks

Don't bother. It's indirect injection and the head can't take any power increase.
You could convert one to direct injection. But it's easier to start with a Di engine and save the hassle.

Originally Posted by martyn jones

Has any one fitted the isuzu 3.1 ie the 4jg2t in a land rover if so could you please give some feed back thanks

What Dougal said. The 2 is the giveaway that it is indirect injection - I think the only exception to that was the 4BA1 - also IDI.

Originally Posted by rick130

I'm not a fan of top mount I/C's, IMO a front mount works better at low speeds and a water/air type is better again at low/crawling speeds.

Add to that, IMO the 110/130 engine bay vents its underbonnet air poorly and a top mount just adds to the problem.

I really need to get a pressure differential gauge and test that theory.

Why do you guys believe an intercooler of any position on an Isuzu in a Land Rover makes a huge difference at low speed. Off road or low speed it's Torque doing the work.

I would worry about it in say a drift car etc. Not a fruit truck with a transfer case .

Justin