6.7, Holset HE351VGT turbo

[moparguy]

So, anyone know how a turbo off an 08 6. 7 works on a second gen. I don't keep up like I used to and don't recall seeing any talk about this. I'd think a Holset HE351VGT would support lower HP engines fine. No lag and more flow capacity than the HX35.

 

[JCyrbok]

So, anyone know how a turbo off an 08 6. 7 works on a second gen. I don't keep up like I used to and don't recall seeing any talk about this. I'd think a Holset HE351VGT would support lower HP engines fine. No lag and more flow capacity than the HX35.

I would think that you would have to have some kind of controller to work the VGTpart of it all. Not sure (actually doubt) if you could make the VGT, the ECM and PCM all play nice together.



J-

 

[moparguy]

And you've just helped me see how little I know on the subject. I'm actually thinking about one for the 95 12v in my sig. No electrons involved. However, tell me more about this controller of which you speak.

 

[JCyrbok]

And you've just helped me see how little I know on the subject. I'm actually thinking about one for the 95 12v in my sig. No electrons involved. However, tell me more about this controller of which you speak.

I'm not too up on the VGT turbos either as I have a 2nd gen with a stock turbo, but if I remember correctly the vanes that create the variable boost in the turbo are controlled by electronics in the ECM.



Here is a post on another forum that I came across while looking into this today.



I'm not sure if anyone makes a control box for the newer turbos that could be used to retro fit to a older truck.



He351vgt - Dodge Diesel - Diesel Truck Resource Forums



hope this helps



J-

 

[moparguy]

Thanks J. Anyone interested check this out. Holset he351vgt - Turbobricks Forums



Near the bottom is a guy who's taken the subject turbo apart and is discussing how to make it work in a non stock application. Over my head but it's being talked about if not worked on.



With a controller, it sure sounds interesting for our 12V prehaps sub 400 hp (or higher???) rigs.

 

[WDixon27]

i've seen some gassers run a wastegate actuator on the vg rack with some success, not sure how well it would work on a diesel, could be amusing trying to get it to do different things with a boost controller

 

[WDixon27]

i just did a butt load of reading and am seriously thinking of getting one to play with, the wastegate thing seems to work well and i have a couple ideas i need to work out if i get one involving having the E brake work too, and different bell crank set ups and or a bleed valve for tweaking the actuation of the vanes

 

[moparguy]

W, strangly this post isn't generating much interest. However I can't get away from thinking this could be a very nice set up for us 2nd gen. mid range hp guys. I need instant boost without barking while towing at atlitude out west. This unit would seem to offer that possibility.



Question is how would it do on cooling if we're fueled to the 400ish hp level.



I wonder if one reason this hasn't gotten much support from the turbo guys is it may not offer the profit potential the custom jobs do. Or could it just be too complex to easily retrofit.



Good luck if you make the leap, working away from home all week then trying to catch up on chores on the weekend doesn't allow for much tinkering so even if I had the skills to figure this thing out, the time issue makes it a nogo for me at this point. But if someone could develope a controller or kit, I'd be very interested.



Good luck, RR

 

[WDixon27]

i have a eye on one on ebay that i will likely step on and they generally go in the $200 range with s/h, i will definetley post what i do with it if i jump on it, i am around 300hp now and want close to 400 and think this could be a cheap toy to play with as the turbo i really want is around $1600, i have a good idea on controlling it with a wastegate actuator and a vacuum actuator in push/pull configuration with a seesaw linkage at the rack lever for bidirectional control of the rack, so it will have a preset opening and range for the rack to open the housing up (with the possibility to tweak engagement with a manual bleed valve) and a option to go below that preset for E brake action, toss in a few vacuum control solenoids for the assorted controls to switch from one mode to the other and it could be amusing. but i can't be sure any of this crap i have thought of will be feasible till i get it in my hands


i kinda get this mad scientist thing going and have a hard time stopping :-laf

edit
i have a couple pages bookmarked where people are working with the stock actuator but i don't see anything major happening, if someone really wanted to i am sure a stand alone controller could be built but i think to do it right it would drive the cost up above where this unit would be attractive, at the moment its a sub $300 turbo with potential but if you add a $4-600 controller then... i still think a universal controller would sell like hotcakes as people are putting this unit on anything and everything but i am not slick enough to pull off designing one

 

[WDixon27]

woohoo $120 shipped and it has the elbow, now if its not a giant piece of crap :-laf

 

[moparguy]

Hey, congratulations that sure sounds like a good, no, great deal. The unit that started me thinking about this was $250 with 10k miles. Guy had gone aftermarket.



Good luck with the mad scientist role. I'm pulling for ya.



RR

 

[Vaughn MacKenzie]

moparguy & WDixon, glad to see your interested in the VGT. I started one or two threads about this in the past but got nearly zero interest. I think it would be a great setup for the medium (300-450) horsepower crowd.

Basically you'd need to figure out the voltage range needed to control the vanes, plot out how far open they should be vs. boost pressure, come up with a good pressure sensor that you can use to generate a signal in proportion to boost, then have some sort of amplifier to drive the vanes controlled by that signal.

 

[WDixon27]

about mid way down this page is as far as i have seen someone get into deciphering one for use, about as far as i would go using electricity to run it if no one came out with a reasonably priced universal controller would be a linear actuator, but i think i can get all i want out of it with mechanical means, a working E brake, rapid spool and cool top end, if i can get this thing working well ill jump on a #10 plate and a south bend clutch, the only thing i see with the current plan being a issue is if i can't find a vacuum actuator that will do what i want, which is put it into the E brake function and pull it back out when vacuum is released by spring, if it can't ill be adding a air compressor to the truck and use that to oppose the wastegate on the other side of the seesaw type linkage i plan to attach to the vg rack

moparguy & WDixon, glad to see your interested in the VGT. I started one or two threads about this in the past but got nearly zero interest. I think it would be a great setup for the medium (300-450) horsepower crowd.



Basically you'd need to figure out the voltage range needed to control the vanes, plot out how far open they should be vs. boost pressure, come up with a good pressure sensor that you can use to generate a signal in proportion to boost, then have some sort of amplifier to drive the vanes controlled by that signal.

 

[Vaughn MacKenzie]

One other small issue to deal with is the oddball inlet flange which neither matches the stock 5. 9L manifold nor is it a T4, seems to be its own dimensions.

 

[WDixon27]

yea i have read about that and will see what i need to build, i still have my stock manifold to play with and make a adapter to fit without taking the truck apart

 

[WDixon27]

got it in the mail today and damn it is heavy, it'll be a little while before i can play as we are moving into a new shop but i think my seesaw linkage can work, i hooked up to the speed sensor with my scope and it gives one AC pulse per rotation of the shaft so i may look into doing something with that before going after the expensive turbo tach that garrett makes

 

[moparguy]

So WD, had a chance to play with the new toy yet?

 

[WDixon27]

not yet as i have been very busy with moving our shop to a new location, i wish i had the turbo for all of the trips with a heavy gooseneck as i was borderline rolling coal for the 3 miles and 2 traffic lights to the new diggs, the lights and traffic killed any chance to not suck fuel at a hellacious rate, i got 11. 7 for that tank but even with the ddp stage II sticks and the plate full forward i didn't get into egt trouble till i hit about the middle of direct drive with it to the mat the whole time it would get to 1250* don't think i could handle mountains with this much fuel and a load. i hope to get to play with it soon as i just got the shop up and running today with all of the lifts and the air is up and functioning, everything else is non critical unpacking of a junkyard/shop load of inventory/supply's. i scored a cheapo ebay dual port wastegate but the front side is not sealed so using it to suck the rack into exhaust brake ain't gonna happen, my back up plan if i can't find a vacuum servo that'll do the job i want ill add a air compressor (wanted one anyway) and do it with pressure

So WD, had a chance to play with the new toy yet?

 

[WDixon27]

i have done some playing around and as of last night i think i am going to abort, attaching this thing to a 12v manifold is going to take a special adapter, both flanges are set up to have studs and have blind holes in the same location so a bolt from the back side is not a option, i cut out a pair of flanges to make a 1" spacer to bolt between the two but the bolt circle is not far enough away from the hole to clear the studs when you wall it up, i think it can be done but not sure it is worth the effort



i have not totally decided the fate of the he351, not sure if i am going to sell it (in a flooded market) or build a manifold for it and bolt it onto my old 6 series bmw if someone wants it i may sell it for what i have in it plus shipping

 

[moparguy]

It does sound like it's not an easy thing to make work. Guess that's why you don't see much on the conversion. I had (still have) high hopes that this could be a great upgrade for 300 to 400hp trucks.



RR