Changing the compressor wheel on the he351ve?

carcrafter22

carcrafter22

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I have an he351ve off of a 6.7L. Do any of you know if I can install a compressor wheel from a 2003 he341? I know the wheel on the he341 is smaller and thats what I am going for. Anyone know?

In case your wondering I would like the samller wheel on the vgt turbo so I can put it on a much smaller motor (3.3L 4 cylinder cummins). The he341 wheel would supply all the air I need but I would like to be able to go down to a much smaller turbine housing than 9cm (which the vgt can provide) then open it up to around 12cm for cruising.
 
Unfortunately, the compressor housings are different and so although you could physically bolt the 341 wheel onto the 351ve shaft, it would fit too loosely into the compressor cover to work efficiently.

The 341 and 351 compressors are not much different, you might as well run a stock 351ve. You're not going to gain much if any spoolup increase with the 341 compressor wheel and the 351 is an excellent compressor wheel.

By the way, although you can shrink the housing on the 351ve, it does have a larger turbine wheel than the 341 so it might not spool that much faster than a standard 341.
 
the he351ve will spool faster than the he341 but not a whole lot since the 341 lights real quick anyways...
 
Good points. I was thinking that the smaller wheel would help but now that you mention it I think the he341 uses a 57mm?? wheel anyway and the he351 uses a 60mm?? so its probably not that big of a difference anyway. I just figured that a 3.3L is half the size of a 6.7L so that may not be the best choice even for a 3.3L with 350cc of fuel and custom injectors but I guess we will see.

I thought the he351ve could go down to around 3-4cm and up to 26cm??? does that sound right? I know on a 5.9L a 5cm exhaust housing would act like a brake but on a 3.3 it would probably just spool really fast since it has way less exhaust flow.

What say you? Is my logic flawed? am I just plain dumb?
 
yes, it does go down to 3cm. i would guess that it would spool pretty quick even if you have to run it at 5,6cm closed. on my truck fully closed is waaaay too restrictive and only allows the motor to get up to 1000rpm (obviously great for the exhaust brake portion but too restrictive to get any sort of spool out of it). if you do adjustable stops you can' adjust it to what the motor likes...that's what i have done.

an he341 would be easier to setup and should flow enough air to keep you happy though.

does the 4bt have a t3 exhaust flange?
 
The 4bt is a T3 flange but this isnt a 4bt.


So what about going with a bigger compressor wheel? Anyone know of a bigger wheel that would fit with some compressor housing machine work?
 
carcrafter22 said:
The 4bt is a T3 flange but this isnt a 4bt.


So what about going with a bigger compressor wheel? Anyone know of a bigger wheel that would fit with some compressor housing machine work?
Click to expand...


oh, i didn't know there was another 4cyl cummins besides the typical 4bt:what:
 
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