Forced induction: trying to decide between Whipple twin screw or Procharger.
+ Reply to Thread
Page 1 of 8 1 2 3 4 ... LastLast
Results 1 to 14 of 106

Thread:
Forced induction: trying to decide between Whipple twin screw or Procharger.

  1. #1
    Head Janitor FormulaZR's Avatar
    Join Date
    Jul 2010
    Location
    Lubbock, TX
    Posts
    690

    Default Forced induction: trying to decide between Whipple twin screw or Procharger.

    So...I'm thinking about adding a blower to my 21' Liberator jet with an EFI 383 LS1. But, I can't decide between a Whipple or a Procharger (because I want a closed engine cover, turbos are not really an option right now).

    The target is 650-700 hp max. I will not exceed that with my current engine...and will most likely have the power down in the 600-625 hp range; but would like a little growing room.

    I had been set on a Procharger, and according to company I'd need 4-5 psi of boost with an intercooler to achieve my goal. But...then I did some thinking on the Whipple twin screw - and they appear to make good peak horsepower, but with increased power in the low to mid range over the Procharger. However, Whipple said my goal would require about 7 psi of boost. The Whipple is more money, BUT that prices includes the built in intercooler. However, once you add all the required parts to a Procharger, the price is very close to the same.

    I just have no idea which direction to go...so I'm looking for advice.
    Last edited by FormulaZR; 08-15-2013 at 12:39 PM.


    "No, my boat doesn't need any more power" - No one ever

  2. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  3. #2
    Senior Member Hass828's Avatar
    Join Date
    Dec 2007
    Location
    okie, lake Texoma
    Posts
    6,275

    Default

    What are the service intervals on the different blowers? From what I understand the prochargers need rebuilt on a pretty regular basis. If the whipple setup will last a lot longer, is around the same money, and comes with the cooler, makes the decision kinda simple.
    "if we keep doing it the same way we always do..we will always get the same results"
    H8-2-W8
    [email protected] first pass

  4. #3
    Member D Johnson's Avatar
    Join Date
    Jun 2013
    Location
    Yorba Linda/ Willow Valley
    Posts
    50

    Default

    Whipple will definitely make more power in the low/ mid range. Prochargers are making tons of power top end for sure. I have 5 litre Whipples on my boat and the service interval on Whipple is change the gear oil in front once a year and that is it. The twin screw rotors do not come in contact with each other so require no maintenance. This is one of the benefits of the Whipple design and in turn they produce very low discharge temperatures. I would imagine that a 2.3 Whipple would support your horsepower goals, maybe a 3.3 if you wanted to make more HP later. Call Whipple they will give you good advice.

  5. Remove Advertisements
    PerformanceBoats.com
    Advertisements
     

  6. #4
    Or Seth, either one Budweiser's Avatar
    Join Date
    Dec 2007
    Location
    Tower Park Resort, Lodi, CA
    Posts
    3,270

    Default

    If you're gonna stay with a jet, the low range benefits of the Whipple will go mostly unnoticed, my vote would go toward the ProCharger. If an out-drive is still on the table of future possibilities, the Whipple should make a notable difference in acceleration.

  7. #5
    Head Janitor FormulaZR's Avatar
    Join Date
    Jul 2010
    Location
    Lubbock, TX
    Posts
    690

    Default

    The outdrive is looking less like a possibility.

    A couple weeks ago I had the opportunity to see how my boat ran in comparison to a powerful outdrive and 300xs powered outboard. I just don't think I can live without my acceleration. Apparently top speed isn't everything.

    The pros to the twin screw is that it's an "all-in-one" unit and the install would be super easy. I'm still unsure if they make the same peak power as a centrifugal (assuming similar size and boost). The less boost I can run, the happier I'll be. Just not sure what I need here.


    "No, my boat doesn't need any more power" - No one ever

  8. #6
    21 Daytona Outlaw's Avatar
    Join Date
    Dec 2007
    Location
    Artesia, N.M.
    Posts
    5,291

    Default

    I have a Procharger
    Go with the whipple
    #55

  9. #7
    Some guy obnoxious001's Avatar
    Join Date
    Dec 2007
    Posts
    3,570

    Default

    Quote Originally Posted by Outlaw View Post
    I have a Procharger
    Go with the whipple
    Wow, that says a whole bunch there!

  10. #8
    Senior Member Roaddogg 4040's Avatar
    Join Date
    Dec 2007
    Location
    Lake Havasu City, AZ/Algonac, MI
    Posts
    5,312

    Default

    Quote Originally Posted by formulazr View Post
    the outdrive is looking less like a possibility.

    A couple weeks ago i had the opportunity to see how my boat ran in comparison to a powerful outdrive and 300xs powered outboard. I just don't think i can live without my acceleration. Apparently top speed isn't everything.

    The pros to the twin screw is that it's an "all-in-one" unit and the install would be super easy. I'm still unsure if they make the same peak power as a centrifugal (assuming similar size and boost). the less boost i can run, the happier i'll be. Just not sure what i need here.



    I wonder where I have heard that before. If you are like most boaters that I know you will want way more boost that what you start with...

    Steve

  11. #9
    gn7
    gn7 is offline
    Senior Member gn7's Avatar
    Join Date
    Jan 2008
    Posts
    25,975

    Default

    JMO but I think the Whipple will be easier on the crank snout.
    Not as much of issue with a BBC at low boost, but on a LS it might be something to consider, even at low boost.



    100% free webcam site! | Awesome chicks and it is absolutely free! | Watch free live sex cam - easy as 1-2-3

  12. #10
    Head Janitor FormulaZR's Avatar
    Join Date
    Jul 2010
    Location
    Lubbock, TX
    Posts
    690

    Default

    Quote Originally Posted by Outlaw View Post
    I have a Procharger
    Go with the whipple
    Why? What about the Procharger are you not happy with?


    Quote Originally Posted by Roaddogg 4040 View Post

    I wonder where I have heard that before. If you are like most boaters that I know you will want way more boost that what you start with...

    Steve
    Well...touche - but in this case it mostly true. I just don't think this engine can exceed 700 hp reliably.

    Quote Originally Posted by gn7 View Post
    JMO but I think the Whipple will be easier on the crank snout.
    Not as much of issue with a BBC at low boost, but on a LS it might be something to consider, even at low boost.
    Pardon my ignorance, but what would make the Whipple easier on the snout than a Procharger?

    GN7 - snout aside, if you were shooting for power above 5000 rpm, do you think the Whipple or Procharger would be better suited for that? What I've read indicates that the twin screw makes good power in high rpms, but I've never dealt with one personally to know. I do know I told Whipple and Procharger both to figure an engine with 450 hp baseline (figured dropping my cam size and compression will knock me from 525-550 to 450-500, and wanted to figure on the low side). Procharger said 4 psi would get me around 650 hp and Whipple said 7 psi would get me around 650 hp. I'm not real FI savvy...so I don't know why the difference IF the twin screw is as efficient as I'm led to believe.

    Plus...the guy I got on the phone at Whipple wasn't real excited to be talking to me...so maybe getting someone more helpful would be beneficial. When I told him I had an LSx engine, he told me to call Mast for help/advice.
    Last edited by FormulaZR; 08-15-2013 at 06:31 PM.


    "No, my boat doesn't need any more power" - No one ever

  13. #11
    Senior Member 74Bonneville's Avatar
    Join Date
    Jan 2013
    Location
    Magic Mountain CA
    Posts
    542

    Default

    I have a M-3SC Procharger with intercooler that I bought in 2007. Has been on 2 boats now. Change the oil once a season. Works great no maintenance issues. I have lots of bottom end, mid range and top end. Bottom line when I hit the throttle it takes off hard. Roughly 10 mph to 94 mph in 5 seconds or so. When it was on my 21' Eliminator it was an all around increase in power and everything fit under the engine hatch.

    Formula ZR
    PM me if you want to talk about it. I've gone through the process learning as I go and now have 6 years. I ran 5 psi for quite a while when I bought it, now I'm up to 9 psi due to engine changes that can handle the boost.

    Intercooler is more efficient with the Procharger which is why you get a little more HP with less boost.

    I need to take some more pics, I've done a few upgrades, Imco fuel tank for one.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

Name:	Procharger2.jpg 
Views:	69 
Size:	22.8 KB 
ID:	354418  
    Last edited by 74Bonneville; 08-15-2013 at 07:49 PM.

  14. #12
    Senior Member 74Bonneville's Avatar
    Join Date
    Jan 2013
    Location
    Magic Mountain CA
    Posts
    542

    Default

    Quote Originally Posted by Hass828 View Post
    What are the service intervals on the different blowers? From what I understand the prochargers need rebuilt on a pretty regular basis. If the whipple setup will last a lot longer, is around the same money, and comes with the cooler, makes the decision kinda simple.
    When the time comes I got a price of $350 for a complete rebuild from Procharger. This is assuming nothing major has gone wrong. After 6 years I still don't know when I'll need to send it in.

  15. #13
    Head Janitor FormulaZR's Avatar
    Join Date
    Jul 2010
    Location
    Lubbock, TX
    Posts
    690

    Default

    ^^ Understood on the intercooler...but the Whipple has an intercooler also. Maybe it's not as efficient? Or???


    "No, my boat doesn't need any more power" - No one ever

  16. #14
    New here Beer:30's Avatar
    Join Date
    Feb 2008
    Location
    Bakersfield, CA
    Posts
    4,219

    Default

    I didn't follow your build, so what intake do you have on it? Factory plastic or a metal FAST or other?

    If you went Whipple, how would you configure the EFI? With the ProCharger or (eventually) turbo(s), as long as you have a metal intake, you can stick with that and just blow into the existing setup.

    With the ProCharger, you could just run a 3-5 psi non-intercooled setup (to save $) and then always add IC later for more boost. More of a "modular" setup than an intake-mounted SC.
    Quote Originally Posted by gn7 View Post
    EFI is the wave of the future. There can be no denying it. Electronics have been on the leading edge of our entire lives. Not only os the magneto dead, but the standard issue CDI is wavering. Its all about total fuel, air AND spark control. Anybody that thinks its not has their head up their ass.


    2001 SleekCraft 30' Heritage SSB, open-bow mid-cuddy. 496HO / Bravo-I.

+ Reply to Thread
Page 1 of 8 1 2 3 4 ... LastLast

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.

Please enter a password for your user account. Note that passwords are case-sensitive.

Please enter a valid email address for yourself.

Please select your insurance company (Optional)

Log-in

Digg This Thread

Posting Permissions

  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts
  •  
 

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95