JW's3Dodges

Is the VGT turbo off the 6.7L's any good? Why couldn't you remove the electronic wastegate actuator and block it off to make a non-wastegated turbo? Is the actuator the only thing that makes it non-desireable? These turbo's seem to be plentiful and CHEAP.

soggy

you can do that, the other thing is they have an oddball flange, so you'll need to figure out an adapter from manifold to turbo.

sdubfid

It doesn't have a wastegate, the actuator controls the vanes on the exhaust side. You could set it up to your desired exhaust housing size and just leave it. They are good turbos.

speed75

i have one yet to put it on what is the exhaust housing size full open

JW's3Dodges

Sdubfid, explain to me how the actuator controls the vanes. I'm not doubting you, just want to understand how it works. Also, X2 what speed75 said about the housing size.

apwatson50

Do a search on here, the 2nd gen forum specifically, there are a couple people who have done the conversion and documented it. But they basically used a normal wastegate actuator or just some type of spring to control the vanes. So basically you're using the drive pressure pushing against the vanes to open them and the spring to counteract the drive pressure. So you really have to play around with different spring rates to get it right. Also If I remember right the volume can go from something like 6cm to 23cm, so its a pretty large range.

Crossy's son

c12h26 has a 91 d250 ve pumper he put a 6.7 turbo on. pm him

You should hear it when he opens the vains. Oh my god it'll hurt your ears.

I don't know the compressor wheel specs on it and stuff. yet

sdubfid

Here is a video on the he351ve variable. Yes it is something lioke 5cm full closed to 25cm full open approximately from what I have read.
http://www.youtube.com/watch?v=y9bi3hTaFUA

That means you could just set it and forget it to say a 12cm housing if you wanted. Some guys are controlling the lever with a wastegate actuator. The more boost you build the more the vanes open reducing your drive pressure with increasing rpm. It would be primitive but I think it would work good. When you are off the throttle it would probably work like an exhaust brake as well if you set it up so 0psi= fully closed.

apwatson50

If you did that and had the spring loose enough to where it would spool, it probably wouldn't stay closed to actually work as an exhaust brake. As exhaust brakes make upwards of 40-50psi of back pressure during braking. So you would need something else that would force the actuator closed to do exhaust braking. IMHO

speed75

i would think if you used a waste gate actuator it would open good with boost but if you let off gas quick it would bark preety bad

apwatson50

Only one way to find out!

The_Head

heh heh, I bought one of these last week. $100. I'm going to sit on it for awhile and see what happens.

JW's3Dodges

Great discussion and great tech advice. I think I'll pick one up and do like The Head, sit on it for awhile and learn some more!

Crossy's son

https://www.dieseltruckresource.com/...e-t245625.html

check out this thread

JW's3Dodges

Thanks Crossy's son. I forgot I read this post the other day. My head's been spinning trying to learn & remember all the different turbo's. Sorry for duplicating c12h26's subject but this has still been a good discussion!