HE300VG OR HE351VE Variable Geometry TurbochargerS - TCCoA Forums
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post #1 of 1 (permalink) Old 06-27-2019, 12:45 AM Thread Starter
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HE300VG OR HE351VE Variable Geometry TurbochargerS

Hey there...

Has anyone ever installed one of these huge HE351VE or HE300VG turbos (they're almost identical, with slight internal differences) on their 4.6 or 5.0 MN12's?

These 51lb monsters come stock on 6.7 Ram diesels and there are already some people on other forums like DSMTurbo, Turbotalk, and HomeMadeTurbo who have already used them with some success on smaller displacement gasoline engines like 2.0 or 2.5L but I cant get a reliable (or at least, hands-on) answer on using them on a V8 for the life of me.

I saw a young guy on Youtube, named Kyle something, (IIRC) who installed one of them on his 4.6 Thunderbird and the turbo response was awesome, no lag at all, instant boost!! ... !... but the kid didn't install a bypass on the intake and the turbo was surging terribly when he let his foot off the throttle... I can't find his videos anymore to get more info from him and the last time I spoke to him on Youtube he said the car had already been sold without the turbo... so, no way of getting more info from him.

The information I have about these turbos (don't quote me on it, though) is:

The compressor wheel is a seven-blade, titanium, 60mm inducer, (similar to an HX35 compressor or so the VGT gurus say on other forums) So if anyone is running a single HX35 (or close, for comparison purposes) I'd like to know what his opinion is on his single turbo set up.

The turbine side (nozzle area) goes from 5cm^2 when closed up to 25cm^2 when open.

They flow up to 67 lbs/min... supposedly good for about 600 hp

My goal is only a low-boost application on my 94 4.6, I guess up to 12 psi max, no more... (that is, if the compression ratio and pump fuel will let me do that, if not, I'll dial down boost pressure to whatever is necessary to keep engine from knocking) I will not be installing stronger internals or modifying the engine at all, maybe rings (and only if compression is way below specs) and valve seals, apart from that, engine will stay stock.

I suppose I'll make around 400-450 hp with that kind of boost...

Comments, please?

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Last edited by Turboedmav; 06-27-2019 at 12:55 AM.
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