4BD1T Turbo Sizing and Performance Prediction.

[Ancient Mariner]

4000 usable rpm would be nice though:D
Glutton

[Vern]

Yep:D

[Dougal]

4000 usable rpm would be nice though:D
That turbo is on the map until 4000rpm with about 30psi.

You'll need a better intercooler!

[Vern]

Yeah I know, not complaining now. Will stick the camper on tomorrow and go camping😊

[loanrangie]

So you will be a happy camper now :)

Sent from my GT-I9300 using AULRO mobile app

[Phil B]

Well done!
Great that you got it right after all that effort and frustration
Thanks for posting it all
We have all learned something
Please let us know how you went with the camper when you get back
Have a good one
Phil B

[Shingleback]

Yeh well done for sticking with it till it's sorted, big relief no doubt! Sounds like your neighbor is well qualified, be great to have those engine tuning skills, funny how subtle changes make a big difference, makes me want to get mine checked for tune :)

For a comparison, what's the 0-100kmh now? And hope it tows your camper well.

Happy camping,
Andrew.

[jackz]

All that, and it turned out to be all in the tuning, makes me wonder whether I shouldn't have a bit more of a fiddle with mine to see what results I can get.

[Vern]

Changing the position of the boost gauge was the best thing I did, it now comes from just before the inlet manifold. And isuzurover was right, fuel screw turned the wrong way by quarter of a turn and it just dies.
What myself and jason started with was fuel screw out 2 turns, boost hitting 19psi, and I just drove it as hard as I could, he watched the gauges, then we just kept adding, could tell we were getting close when it was boost really quick, and getting to the governor in no time.

Once egts were hitting 690, we turned the fuel another quarter of a turn, and it would surge, so backed the fuel back and all was good.
That Turbo does work well with this engine. I could get more out of it, but for now that will do, next year I will go water to air inter cooler (that's all I could fit), then more boost and fuel. I also have a n/a engine here I might build up to Turbo spec.

I think an auto would really make this car though, think I will call Sheldon in the new year and see how his is panning out. Ford aod or t700, that is the question.

[loanrangie]

If you look at the post on the nv4500 to isuzu you'll see the trans adapter , then its only t700 to lt230 to think about.

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[Vern]

If you look at the post on the nv4500 to isuzu you'll see the trans adapter , then its only t700 to lt230 to think about.

Sent from my GT-I9300 using AULRO mobile app
Yeah have been looking all over the place, my bro in law wants to do this in his disco, we have a built t700 from my old chev diesel rangie, a lt230 in bits, my spare motor, we just need time and he needs money. I keep telling him to buy a land cruiser or patrol:D

[Vern]

So far towing well, needs a little more, but still quite happy, you know the camper is behind you, but a little more tuning will make the difference. Gotta get rid of these tyres but thats another story.

[loanrangie]

Glad its working well enough for you to relax a bit, auto would be good.
I know some think that a tdi auto is a slug but if it was 3ltr with a VNT it would kick arse.

[Dougal]

Yeah have been looking all over the place, my bro in law wants to do this in his disco, we have a built t700 from my old chev diesel rangie, a lt230 in bits, my spare motor, we just need time and he needs money. I keep telling him to buy a land cruiser or patrol:D

Is that the 700R4?
Most people who've tried them in the states behind 4BD1T's or Cummins 4BT's won't recommend them. The torque pulses of the big 4 cyl diesels cause failures that you don't get with more power on a V8. Even high dollar rebuilds that are bulletproof in the V8 scene have had issues.

They are recommending the 4L80/4L85 which is significantly tougher or the 47RH from a dodge. I haven't heard of anyone but Sheldon using the E04D. Likely because price and availability of the 4L80/85 in the US makes it an easy choice.

Personally 6sp is the point where I could live with an auto, but I much prefer manual. I want to fit the MXA 6 sp. That's a whole project in itself.

[Vern]

Ok so been pulling the camper around justin coopers territory today, got some big hills, i need way more power (jc, hill coming out of kingston heading to hounville), 3rd gear on the governor (75kph), so will either order a big water to air intercooler or re power it for way more torque. Car goes fine with out the camper, goes ok with it but not awesome.

[steveG]

Ok so been pulling the camper around justin coopers territory today, got some big hills, i need way more power (jc, hill coming out of kingston heading to hounville), 3rd gear on the governor (75kph), so will either order a big water to air intercooler or re power it for way more torque. Car goes fine with out the camper, goes ok with it but not awesome.

What EGT's/boost were you at during that? Foot to the floor to stay there or one of those in-between-gears situations?

Steve

[Vern]

22psi, 668egt (got to 690 backed off, no real performance to gain), run out of puff in 4th gear, no real smoke, i need more boost and fuel but i think the intercooler is holding me back.

[BadCo.]

Maybe you need to change your transfer case ratio, if you have no power in 4th and 3rd is on the limiter and it feels like you need a gear in between.

I don't remeber exactly, but you have a range rover? What is its stock transfer case high ratio? What size tires are you running?

[isuzurover]

Time to ditch the lt95...

[BadCo.]

^^^ Or that haha

[simontrickett]

Hi all I've been reading this thread since the start as nobody else seems to have covered it like here . My aim is to upgrade the Mazda 35slti in my 90 as the 38"s need a bit of go ,yes I know its an Isuzu thread but there are many similarities in the two engines .
Original turbo is a hitachi HT-10 but comes with an odd elbow to miss the 90 bulkhead .HT-18S is way to big to work .Went off the vnt route from the posts on here .
The GT2259 won't fit in the space and the HX27W needs clocking and other bits to fit in .
So I decide to go for a Kinugawa TD04L-20T-6 as the Holset H221W is not easy to come by and will not bolt on without extra work .
Well the pictures say it all the genuine cummings /holset flange fits the kinugawa with the mitsubishi core or am I missing something - sorry if this has been covered already .

https://www.aulro.com/afvb/images/imported/2016/04/750.jpghttps://www.aulro.com/afvb/images/imported/2016/04/751.jpghttps://www.aulro.com/afvb/images/imported/2016/04/752.jpg

[BadCo.]

You lost me, what was the question in the end?

[simontrickett]

Whats the best turbo to upgrade a 4BD1T Isuzu engine or in my case a Mazda 3.5 TDi .

:D

[simontrickett]

I was hoping Dougal might have some input but the threads gone a bit cold now .

But the main point is how to get the diesel hp up from stock with aftermarket products ,as you do ;)

[BadCo.]

I don't think Dougal posts here anymore.

You read the entire thread so you know what the three best choices are for the 4BD1, we are just missing a lot of real life testing.