Roots Blower on Cummins

Begle1

Begle1

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Looking at that long skinny intake manifold cast into the stock head, wouldn't a roots-style blower just naturally fit on the top of that thing?
 
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I've been looking at these darn three empty threaded holes in the front of my head for 15 years now and I still haven't figured out what I'm going to bolt there.
 

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Didn't Piers build one many years ago? I tried the old google image trick, but didn't find the one I was thinking of.
 
Have thought of doing this also. Have seen pictures over the years but not seen any results.
 
This Australian company does a lot of inline 6 performance stuff. Give you a layout idea, just instead of a carb on top, have the turbo feeding into it.
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Restriction is greater than the gain in instant boost in my opinion.
 
I have thought about doing the newer Eaton Blowers with a bypass valve made on them. A buddy has been working on a 4bt with an HY35 and a Eaton bypass blower for years, I'm betting it will never be done, LOL

Chris
 
Begle1 said:
I've been looking at these darn three empty threaded holes in the front of my head for 15 years now and I still haven't figured out what I'm going to bolt there.
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:hehe: You just about killed me laughing with that one. That's exactly how my friend and I talk in the garage:"Hey, we've got three bolt holes not doing a thing! They need to earn their pay and start making horsepower!"
 
Yes, PDR was involved in a Wipple Blower on a 1998 215hp engine back in 2005. Although cool looking & sound, the combo hurt fuel mileage big time & power came in faster as you can see when I dyno'd the truck, peak hp power was only 5hp more. The torque was impressive though. I overlapped the dyno sheets so one can easily see apples to apples. Single turbo sheets on the left & blower sheets on the right.
In my opinion, it is not worth the massive drop in fuel mileage. If I remember right, 4-6mpg drop.
 

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I always wanted to see a blower setup in an offroad application where torque response is more critical.

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wannabehero said:
There's always this... Whipple Supercharger kit
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Perfection! I don't usually see things for sale that I really want.

chevota84 said:
A Whipple/screw would definitely be better, roots are pretty bad at moving air compared to most any other option. I havent heard if Carl is still running that setup.
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I didn't know there was a difference between a roots/ screw/ whipple supercharger. Can I just call them all blowers?

Reading about it, it sounds like they just figured out a better way to build the rotating mass. Makes me wonder what the advantage of a roots is? The ability to last for a million miles on a 2 stroke Detroit?

Nascar said:
Yes, PDR was involved in a Wipple Blower on a 1998 215hp engine back in 2005. Although cool looking & sound, the combo hurt fuel mileage big time & power came in faster as you can see when I dyno'd the truck, peak hp power was only 5hp more. The torque was impressive though. I overlapped the dyno sheets so one can easily see apples to apples. Single turbo sheets on the left & blower sheets on the right.
In my opinion, it is not worth the massive drop in fuel mileage. If I remember right, 4-6mpg drop.
Click to expand...

I vaguely remember this. Looks like it did what you'd expect it to do; move power way down lower.

For the mileage, it dawns on me that you could do the Mad Max thing on a diesel, put the supercharger on a clutch and have some sort of bypass/ check valve so you cruise on turbo only and engage the supercharger when you need the low down power. Although that sounds a hundred times easier to do with a centrifugal/ ProCharger type setup.

But at least they covered up those darn three holes in the front of the head.
 
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Begle1 said:
Perfection! I don't usually see things for sale that I really want.



I didn't know there was a difference between a roots/ screw/ whipple supercharger. Can I just call them all blowers?

Reading about it, it sounds like they just figured out a better way to build the rotating mass. Makes me wonder what the advantage of a roots is? The ability to last for a million miles on a 2 stroke Detroit?



I vaguely remember this. Looks like it did what you'd expect it to do; move power way down lower.

For the mileage, it dawns on me that you could do the Mad Max thing on a diesel, put the supercharger on a clutch and have some sort of bypass/ check valve so you cruise on turbo only and engage the supercharger when you need the low down power. Although that sounds a hundred times easier to do with a centrifugal/ ProCharger type setup.

But at least they covered up those darn three holes in the front of the head.
Click to expand...
There's no real advantage to a true 60° roots blower. DD used them because that's what existed and they weren't using them to make power so they weren't real concerned about efficiency. A high helix is still a "blower" but much more efficient than the 60° rotors. Screws are really totally different animals and more efficient than any roots.

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