Thread: VNT Turbo install

Mundy.
A VNT is my next project. We tow a big van and the Disco is very dead when the turbo is off boost. Love to hear how it goes in the long term.
Regards
Robbo

The boost box + modified MAF route seems to be pretty common with the VNT upgrades. In many ways you'd be better off with the IRB dual channel boost box which gives you the ability to modify the MAF's output. It means you can use stock MAF's rather than relying on tuning companies for continued supply of the modded units.

IRB Developments

cheers
Paul

Just got the same kit for my d2 and it's good to near that it works well in a manual as I was thinking of swapping my tired auto for a manual. I look forward to hearing any updates.

I find this part of the post interesting Pete Bell told me not to adjust it as it is preset and you shouldn't mess with it.
I think you will find if you speak to Jose and he does a MAP for the VNT you will have a much better result, the larger inter-cooler also helps.

Originally Posted by Mundy

etc. Whilst it was a simple swap over, the tuning was tricky (apparently) as when initially installed, it was generating max boost of 35psi and ultimately required a different maf to work smoothly. It’s now wound back to 23. Haven’t needed to change the programming and don’t expect to change the intercooler but we’ll see.

Originally Posted by djam1

I find this part of the post interesting Pete Bell told me not to adjust it as it is preset and you shouldn't mess with it.
I think you will find if you speak to Jose and he does a MAP for the VNT you will have a much better result, the larger inter-cooler also helps.

I/we were a little surprised, too. But 35psi was way too high and now at 23 it works well as described. A new map and/or intercooler are options but from my part, if fuel economy is ok, low end continues as is now, there's no degrade of high end performance, and egt's aren't excessive, then it ain't broke and I don't need to fix it. If I am operating at a slightly less than peak output then hopefully things will last longer.

I have put a BAS vnt on and map on my Defender TD5 and Pete told me the same thing, that is not to play with it. BUT I think it needs playing with. It seems to have a pretty good bottom end, but then is simply seems to stop trying. I can just get to 110 on the freeway and that is about it. So at the moment I am pretty disappointed, but hopefully will work what is going on at some stage.

Do some monitoring with a Nanocom or similar it should pull at least 160 Km/h.
Maybe a MAF or something
Any ideas what the EGTs are?
I also found a big improvement in top end by doing the airbox mod (search on this site)

Originally Posted by djam1

Do some monitoring with a Nanocom or similar it should pull at least 160 Km/h.
Maybe a MAF or something
Any ideas what the EGTs are?
I also found a big improvement in top end by doing the airbox mod (search on this site)

My EGT probe is before the turbo and it not too different before and after the VNT installation. Before I could get to 600+ and now maybe 50 deg more but that is about it. The EGT's go up when it is loaded up (which is to be expected) but if I put my foot down to get from say 90kmh and push it to 110 they don't seem to change that much but its a real struggle to get there
I do have a Nanocom but arn't really sure what I am looking for....