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Holset VNT turbo
by
rallydiesel
on 21 Apr, 2009 20:40
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I've seen these going for pretty cheap on ebay. It's a Holset VNT He351Ve turbo. Came stock on a Cummins 6.7 engine. Interesting thing is the vnt range is equivalent to 3cm^2 all the way to 25cm^2 exhaust housing. With that much range you'd think it could be made to work for an engine our size.
Currently can be found on ebay item 180348738968.
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#1
by
maxfax
on 21 Apr, 2009 20:53
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I'd be wary of those things selling so cheap... I have to wonder why they were removed.. Not really much out there as an upgrade for these yet..
The 6.7 has has alot of turbo problems, soot related from their half a$$ed attempt at meeting emissions standards... Best case scenario they can be cleaned and the vanes un stuck, but Cummins has had to eat just quite a few of these too...
The next thing could be cramming that sucker under the hood :shock:
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#2
by
blackdogvan
on 22 Apr, 2009 09:31
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Cummins Holset Vs. K26.
Ya, bit different...
Stole the photo's from a mercedes diesel forum.
There are a few VNT builds there but no new or better control ideas.
The vane control on these turbos is way different from the garrett turbo's, maybe way better from a sticking due to carbon buildup point of view.
maxfax, looks a wee bit sooty, huh.
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#3
by
53 willys
on 22 Apr, 2009 12:02
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lol
looks spoolable!!!!
reason these units are so cheap is cummins guys dont like or really care for VNT turbos....traditional turbos seem to work lots better for the high performance cummins.
k26 on our car=LAG
VNT cummins turbo on our car=might as well be a NA.
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#4
by
rallydiesel
on 22 Apr, 2009 12:24
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lol, now that I see them side-by-side... :oops:
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#5
by
maxfax
on 22 Apr, 2009 13:42
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lol, now that I see them side-by-side... :oops:
:lol: That's kinda what I was thinking.. The ebay pic isn;t too good at showing the size of those things...
I thought in stock form the VNT worked well on the 6.7.. THe problem is the darned EGR.. I've had a few of those engines that were soo soooty it gunked up the intake air heater to the point cold starting was compromised...
I guess after about 20 different ecm flashes they have gotten better.. 2 bucks wioth of steel plate cut in the shape of the EGR gaskests seems to be the best solution though...
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#6
by
blackdogvan
on 22 Apr, 2009 14:56
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I like the cummins 3cyl warm up idle.
As for the Holset, ya toooo big. Sprinter GT22's are becoming pretty plentiful tho. We just need someone to figure out the best adapter plate...
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#7
by
aidan
on 23 Apr, 2009 10:32
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Has anyone got any specs on the 6.7 these come off? I.e what rpm is max torque, what pressure it runs, even a dyno of a stock one? Can't seem to find anything on google that isn't about a modified one
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#8
by
53 willys
on 23 Apr, 2009 12:50
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#9
by
OM617
on 21 Jun, 2009 03:20
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Even being a VGT, that 351VE would probably spool around 4000rpm and surge like no other on a VW.
Those pictures are mine. I got rid of that turbo because I decided it was much too large even for my 3.0L MB diesel. Most of the units on ebay were removed due to soot caking in the exhaust restricting vane movement. There is nothing wrong with them and most are nearly brand new! A quick tear down and soot removal is all they need to get back into new condition.
They soot up quick because the 6.7 cummins retards the injection timing to make the exhaust really hot and burn off DPF soot. Making the engine run hot and dirty to make it clean, kind of an oxymoron isn't it?
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#10
by
foxracer1
on 21 Jun, 2009 08:31
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Yeah but the government stardards are there to help clean the air. Cause when an engine consumes more fuel while trying to produce cleaner air its better right?
I followed a cummins on the highway i smelled raw fuel got concerned looked at my gauges then smelled a chlorine almost pool water smell. I realized the cummins was burning off the dpf. Such a dumb theory.
Tell me how useing more fuel is better. The emissions can't be better when its dumping raw fuel into the exhaust stream.
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#11
by
53 willys
on 21 Jun, 2009 10:46
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it might be dirty on the inlet of the DPF filters....but it's cleaner out the tail pipe and that's all they care about
chlorine smell is the catalytic converters/filters nothing to do with the regen that the 6.7 cummins does....my jeep grand Cherokee has the Mercedes 3.0 v6 CR diesel and it's cleaner then their gas engines..and has the same swimming pool smell..(no regen though so it's gotta be the filters)
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#12
by
jtanguay
on 21 Jun, 2009 14:16
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I always got a kick out of the air pumps fitted to later carbed engines that blew air into the exhaust. Their biggest effect on emissions was simply dilution at the expense of robbing horsepower and lowering overall engine efficiency. LOL!
yea i wonder who came up with that bright idea... 'well rather than reduce emissions the right way, lets do it the sneaky way'. i bet the EPA loved that!!!
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#13
by
OM617
on 21 Jun, 2009 16:02
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my jeep grand Cherokee has the Mercedes 3.0 v6 CR diesel
Your Jeep is a Bluetec, it has a DPF.
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#14
by
RabbitJockey
on 21 Jun, 2009 20:34
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i think one of those could be made to work, was it mjf and turbo j were talking about a guy that did 270hp with an hx35 which is a larger turbo with a split turbine. it's a similar sized compressor though. you'd just need an engine that can breath to really make it run, and it obviously wouldn't spool very quickly down low, and when it would surge it already has built in surge protection. but they posted the dyno of the guy with 270hp, and he started making a big leap in power around 3500rpm(where he already had 125hp), i would think the he351 vnt would spool quicker being that it's a vnt. it's definitely something worth experimenting with imo. dave used very large turbo on his 195hp build i think it was a t3/to4e 60 trim maybe? i forget the specs and he never posted them all together you gotta skim the whole thread to get them. obviously this isn't the turbo for someone trying to make 150hp on their dd but i think on a 1.6/1.9 or aaz built for big numbers it would be a good choice. but i don't really know that much about turbo sizing, it seems not to apply well to diesel engines tho.