4BD1T Turbo Sizing and Performance Prediction.

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Originally Posted by Vern

4000 usable rpm would be nice though:D

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Glutton

Yep:D

Quote:

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Originally Posted by Vern

4000 usable rpm would be nice though:D

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That turbo is on the map until 4000rpm with about 30psi.

You'll need a better intercooler!

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

So you will be a happy camper now :)

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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

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.

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.

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.

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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