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OldMagicfloat

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Discussion starter · #1 ·
HELP, somebody, please help me understand.

I got a few questions, no really a LOT of questions, concerning blowers, and I've read and surfed and searched, and ya know, it'd be a whole lot easier if you blower guys would just give me the 'do this, don't do that' stuff, and follow along with me as I try to get my mind around some of the practices that go along with 'blower ownership'.

I am only concerned with rotor type blowers.

1) Are all rotor types ROOTS?

2) Are ROOTS and SCREW the same thing? Is there nonhelical rotors?

3) Do they all have blower oil in the cavity, for the bearings?

4) WTF is the deal with WHIPPLES? Are they an EATON, basically, and while we're here, who all makes them? I know of B&M/HOLLEY, EATON, WHIPPLE (I guess it's different...), who else?

5) Is a quad rotor a 4 rotor blower (uni) or a melding of (2) two rotor blowers, made into one unit? Who does this?

6) Do all marine blowers have the bypass, typically found in modern blown autos, that dumps boost when not needed, for mileage, and to reduce drag?

7) Do you have to use the the applicable blower configuration (for yur specific heads), or are there common adapter plates that mate standard bolt patterns to specific heads?

8) Do they all have the carb bolted vertically, atop the housing, or is there side carb mounting ones?

Okay, I got tons more, I'll let this simmer some, before I add more stuff to the mix.
 
Discussion starter · #2 ·
1.yes,straight and helical(twisted rooters)

2.no,screw as it looks w/ male and female screw compress air in betw them in the center of the screws.

3.yes,i believe so,at least the good ones i know of do.

4.no,whipple is a screw built by lyscholm,eaton is a helical rotor.bm is there own,and then many makers of the #-71's based off the original design of detriot diesel.

5.two whipple units on a common intake manifold.

6.no,only whipple,thats why they draw about 1hp when not in boost.

7.basically the intake is the same,6/8-71,10/12-71,14-71

8.most on top,side mounts can have the fuel puddle before it tries to go in.
 
those where great answers.

Screw type blowers the rooters don't touch they make the same boast at a lower temp but the spin a lot faster

the difference between strait and twisted rooters is strait pull in air and make pressure in the intake twisted rooters take in air compress it from the back of the blower to a pie shaped hole in the front of the blower and blow it in the intake manifold.

I think what you are asking about the blow off valves is blowers dont have them because as soon as you lift the throttle the blower is in a vacuum.
in prochargers and turbo the throttle is after the blower and 10 to 30 psi on the throttle is hard on parts epically the fan in the blower or turbo
 
Discussion starter · #5 · (Edited)
Smitty, not to say I know a damm thing, but I seem to have a fair handle on how to build a combo of parts, to make strong reliable power, in a boat. I think I'm an NA dude, for the most part, although who knows what a midlife crisis would do to me? I can get all the putang that I'd ever need...so I ain't gotta go there.:D

But my brain is sorta like tree roots; I gotta keep trying to suck up as much of the power nutrients that I can.

1) So...Roots are straight rotors?

2) So...Screw/twisted/helical is where it's at? Straight rotors suck, because of?

3) I figured.

4) So... B&M is helical or straight? And the DD -71's are helical or straight? Are B&M's a derivative of DD -71's?

5) So... Quad Rotor is (2) standard two rotor Whipples on a manifold that adapts the two to the heads?

6) Eaton's (latest) seem to be the primary rotor SC in automotive, and have the bypass. Nobody but Whipple uses the bypass for Marine?? I thought that the bypass valve was the trick way of dealing with SC drag when not in boost... :confused: Is this not an issue in marine applications, due to the always sorta going uphill, that pushing water causes?

7) Let me try a different way: Are blower housings application specific (Ford SB, Ford BB, SBC, BBC, etc.) OR are the housings a SC OEM standard pattern, with a plate that adapts blower housing to the particular engine mfr?

8) I figured.

9) What does Whipple have over an Eaton, outside of Dustin's Marine R&D (mechanically)?

SMITTY, more pics, and a description, please?
 
I ram a B@M and had no problem at all.

In my opinion you don't need twisted rotors until you are running large amounts of boost and over drive.

On our race car we run a Little field with Kobelco K11 rotors at 45,50,55, percent over driven, and we make between 45 and 50 lb of boost. at that much boost you begin to make a lot of heat and strait rotors just cant get it done.
 
Nice picture Cory. I figured after last year "blown up" was a fitting name. I have plenty of slightly used spare parts in the garage if you need anything :laugher:
Looking forward to a much better summer this year. If not, a twin ob set up will be looking better and better.
 
bigblokdaze said:
change over to efi,problem solved. ;)
You couldn't give me an EFI system when using a blower. Just ask Bayley how his experience has been with his new Whipple EFI motors.
Plus you are at the mercy of somebody reflashing the computer and hoping they got it right. If not then you get to send it back and let the idiots take another crack at it to see if they can get it right,and lets not forget they are charging you everytime they refash it. (PASS)
I just have to do some minor jet changing and off I go for another run. :bigsmile: I will stick with my carbs thankyou very much. :winker:
 
Discussion starter · #20 ·
dominator scott said:
You couldn't give me an EFI system when using a blower. Just ask Bayley how his experience has been with his new Whipple EFI motors.
Plus you are at the mercy of somebody reflashing the computer and hoping they got it right. If not then you get to send it back and let the idiots take another crack at it to see if they can get it right,and lets not forget they are charging you everytime they refash it. (PASS)
I just have to do some minor jet changing and off I go for another run. :bigsmile: I will stick with my carbs thankyou very much. :winker:
sorry to hear.my friend has a 02' 37 quad step w/ ke725's efi and #6's.totally turn key and 103.7mph all season long.
if it were me,a fast or dfi gen 7 w/ wide band feed back,but you are right,a carb is easy to tune and run sweet.me,i'll let you know how the efi whipples i'm building turn out.i'm also buy the merc tuning software. ;) i trust no one to tune my stuff.carb or efi
 
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