Just curious, if the Holset he351 VGT can vary the effective exhaust turbine volume why not put a really agressive compressor section on?

 

you mean like a bigger compressor wheel? something bigger like a 64 or 66mm comp. wheel for the s300 series of turbos?

 

Search the 431 vgt.

 

Or bigger. I'm thinking with a good sized compressor wheel and a VGT we might be able to have a single turbo that performes as well as a staged setup.

 

How big is an HE551?

 

he551ve
comp
ind 71.75mm
exd 108.1mm

turbine
ind 86mm
exd 75mm

housing
16cm-36cm

 

I like where you're going with this... what's the closed area/open area of the exhaust side of the 351 vgt?

 

6-26 i believe

mine and the downpipe might be up for sale soon

 

Nice numbers - but I think the turbine ##'s are a bit high....

Maybe the 431 is a better match...

 

I think he wants to put the HE551 compressor on the HE351VGT exhaust housing/ wheel.

 

I guess the next question is would the compressor side of the he551 go right onto the 351vgt?

 

HAHAHAHAHAHAHAHAHA

Nice idea, but having ran a HE551V, there's absolutely no way you could put it on a 351 frame. That wheel's Major diameter is almost as big as an S480's...

HE551V, with electronic controllers they have coming to market now, might be a viable option...but I couldn't get it to spool below 2000RPM with a ported head and cam, but she made good power once it lit. 551/1083.

Chris

 

Signature600, was that on your 2010???

I think the VE might be better cause of the advance timing and low end fueling.

 

i had the exact same idea, it just seemed to me that the bigger turbos also had a larger center section. This to me meant (to me) that the interchange was impossible, but with the right adapter plate or maybe have some machine work done, it could be do-able. Having my he351cw to reference, it just a simple flat surface with a stepped groove around the edge, to make that surface larger and have a new groove machined in wouldn't be hard (by someone with the tools). I also think there would be lots of turbo lag, even with it closed.

You may be onto something here, keep looking into it. I'm interested!!

 

No, on my 98 12v with a very large P7100 pump built by Columbus Diesel Supply.

I VE truck better just leave HE551 on the bench...no offense, but if you can't spool it early, it won't work well on a VE. In my experience at least.


If I wanted to modify my 2010, I have a HE551VE, that would swap right on, and plug in and be controlled just like factory. I also think that with a good cam, and the 6.7L displacement, I could spool it very well and make a LOT of power with it...but my 2010 is my daily driver, and I need it to reliably tow in excess of 30K gross weight. High power is not an option...she may just stay stock

Chris