Thread: Another 120 project begins

The T3 is a good combination on the Isuzu. I presume it it a 4 speed considering the age. Which is the best combination for these motors. At 400K the motor shouldnt be worn out but I would suggest a compression check to ascertain condition before turboing, they should be around 440psi. I put a 4BD1 with 200K into my 110 and turboed with a watercooled T3 and did another 550K with it before the compression started to fall off. In the end it only had 200psi and was still going good but lacked grunt on hills or when towing. You will be impressed with the difference. Good luck.

Agree with Brian the T3 is a good option. T3's on SAABs had the low exhaust AR. T3s are the most manufactured Garrett turbo. However, T3 with small AR is not that easy to find. The T28 with a small AR like found on some imported Nissans is easier to find. The T28 has a similar compressor to a T3 matched with a T25 turbine. IHI is another possibility.

As Ben found a new manifold is still available from Isuzu. I found Isuzu in Brisbane hard to deal with. There are several formats and they couldn't tell me which format they were selling me. So I didn't know if the one turning up was top/bottom or side mounted turbo.

I used a GT28R which is a ball bearing version of the T28. I have been very happy. I paid $1100 new.

Where'd you find that?

I've got a great deal on the manifold - Dougal posted a link to in isuzurover's Budget 4BD1 Turbo Install post.

Was $160 US all up with postage (that's when the aussie was around the 0.8 mark).

They come up on ebay all the time, here's a link to an identical one if anyone is looking for one.

eBay Motors: NEW ISUZU NPR EXHAUST MANIFOLD (item 120330384720 end time Nov-14-08 09:12:00 PST)

Cheers

No pics of the astroturf Bojan???

Good to see another 4BD1 120". Looks in fair shape. I like it in Red.
I have a Turbo on mine. Still is not a rocket but nice and punchy to drive Keeps up with traffic no worries. Just lacks a bit in top end RPM. Hope to sort this soon.

Tony

Originally Posted by Bearman

The T3 is a good combination on the Isuzu. I presume it it a 4 speed considering the age. Which is the best combination for these motors. At 400K the motor shouldnt be worn out but I would suggest a compression check to ascertain condition before turboing, they should be around 440psi. I put a 4BD1 with 200K into my 110 and turboed with a watercooled T3 and did another 550K with it before the compression started to fall off. In the end it only had 200psi and was still going good but lacked grunt on hills or when towing. You will be impressed with the difference. Good luck.

Cheers,

Ben took me for a spin in his newly turboed suzi and it goes great... put a smile on my face... almost comparable to the V8! .

It's got the original 4 speed I believe and still going strong, except the CDL on the TC is not engaging - suspect vacuum line perhaps?.

I've also got an LT95a mated to a 0.996TC to go in, but am wandering if it's worth the effort of swapping. What are the benefits of the LT95a over the standard LT95?

Originally Posted by rovercare

Where'd you find that?

Central Coast NSW near brunswick heads. Accidentaly found it on country post while googling isuzu rovers .

Originally Posted by isuzurover

No pics of the astroturf Bojan???

Will take plenty of pics on the weekend... , do you think I should pitch a tent up for extra effect!

Originally Posted by Rangier Rover

Good to see another 4BD1 120". Looks in fair shape. I like it in Red.
I have a Turbo on mine. Still is not a rocket but nice and punchy to drive Keeps up with traffic no worries. Just lacks a bit in top end RPM. Hope to sort this soon.

Tony

Thanks Tony... it's OK externally, the chassis is amazingly rust free, and it comes with a few goodies hidden away (namely front and rear maxis, winch and long range tank under the tray)... might have been resprayed at some stage as the paint looks pretty good (or it could be that I washed it really well prior to handing it over to Autotrans).

Could be a bit better internally (the instrument cluster is loosely hanging on by 1 bolt) but at least I've got easy access to all the wiring Has a few things that need sorting out (few electrical gremlins, leaky power steering, 30degree steering wheel play, warn belts, rusty wheels and well worn tyres), but nothing major so far.

Impressed with the 4BD1 so far - it will quite happily run with a diesel leak out of the supply line (as I found out)

What turbo do you have on yours?... and how do you plan on sorting it out for more top end power?

Cheers

Bojan

Originally Posted by Offender90

...........
It's got the original 4 speed I believe and still going strong, except the CDL on the TC is not engaging - suspect vacuum line perhaps?.

When I had that trouble it was the (live) wire to the reversing light switch had shorted where the connector hat touched the edge of the air cleaner and pulled enough undone to short - the melted wire cut the vacuum line on top of the bell housing under the air cleaner.

I've also got an LT95a mated to a 0.996TC to go in, but am wandering if it's worth the effort of swapping. What are the benefits of the LT95a over the standard LT95?

I think they are supposed to be more durable - I would not bother changing it if the case in there is good.


...........
Could be a bit better internally (the instrument cluster is loosely hanging on by 1 bolt) but at least I've got easy access to all the wiring Has a few things that need sorting out (few electrical gremlins, leaky power steering, 30degree steering wheel play, warn belts, rusty wheels and well worn tyres), but nothing major so far.

Loose instrument cluster is probably a function of the tendency of the Isuzu to shake everything to bits, but also the plastic tends to disintegrate - you may have to replace it - they are not that expensive. Steering play is probably tie rod end or panhard rod bushes, but should be easy to track down. As far as the wheels go, note the recent warning on Sunraysia wheels.

.......
Bojan

What I don't understand is with 120s as rare as they are, how did you manage to find a colour match to the 90?

John