Results 1 to 14 of 14

Thread: gm fan

  1. #1

    Default gm fan

    What is the part number for the 19 inch gm fan

  2. #2

    Default

    It should be GM 405442 or 809-405442

  3. #3

    Default

    what is the differance in the all-star 4 blade has the same pitch

  4. #4
    Join Date
    May 2007
    Location
    in a van down by the river
    Posts
    1,892

    Default

    never seen an Allstar blade with the same 45º pitch as the GM.
    Unless they just started having them make
    I think there should be lifeguards in the genepool.

  5. #5
    Join Date
    Sep 2011
    Location
    Central IL
    Posts
    504

    Default

    I have seen some places selling GM 19" fans with 60° pitch.

    http://www.circletracksupply.com/ste...s-hd-fans.html

    This is the one I use, it gave me a huge temp drop from the Allstar one.
    Last edited by 72Dubya; 03-03-2015 at 05:13 PM.
    #72W U.M.P Stock Car

  6. #6
    Join Date
    May 2007
    Posts
    1,289

    Default

    15-80752 is the Acdelco part number. Usually can be found cheaper under that number.

  7. #7
    Join Date
    Sep 2011
    Location
    Central IL
    Posts
    504

    Default

    Here is the GM fan for a little under $70 using the number stockcar5 provided. Pretty good deal here.

    http://www.amazon.com/gp/product/B00...=ATVPDKIKX0DER
    #72W U.M.P Stock Car

  8. #8
    Join Date
    Sep 2011
    Location
    Central IL
    Posts
    504

    Default

    Where did anyone mention a fan adding HP? lmao
    #72W U.M.P Stock Car

  9. #9
    Join Date
    Sep 2011
    Location
    Central IL
    Posts
    504

    Default

    I see what you are getting at, I just don't need to argue with someone who is ALWAYS right because of course I will lose, but you are really reaching in your argument that I take as you seeing me promoting snake oil. Maybe it isn't 60° pitch, maybe it really is 36° which would make you correct, but all I am saying is it worked for me and what the website had it listed as.

    I own some of the 36 pitch fans, and the one from CTS seems to have a little more pitch, it may not be 60 but it's something.
    Last edited by 72Dubya; 03-04-2015 at 08:56 AM.
    #72W U.M.P Stock Car

  10. #10
    Join Date
    Jul 2011
    Posts
    224

    Default

    Kind of wondering where the horsepower thing came from myself

  11. #11

    Default

    Wow those gm fans are pricey and at over 19'' they are hard to build a shroud for.I'm giving around $35 dollars from a local guy (gets them from Day motorsports) for a 17 '' .Then I build a tight shroud for it.

  12. #12
    Join Date
    Sep 2011
    Location
    Central IL
    Posts
    504

    Default

    Quote Originally Posted by save the racers View Post
    Wow those gm fans are pricey and at over 19'' they are hard to build a shroud for.I'm giving around $35 dollars from a local guy (gets them from Day motorsports) for a 17 '' .Then I build a tight shroud for it.
    You are very correct about the fans being expensive and the shrouds being hard to fit the 19", but the efficiency they cool at, it is worth it IMO.

    Dominator sells a really nice shroud that easily fits the 19", and if your fan does not reach the cutout for the fan, it is easily extended with plastic or aluminum (whatever your flavor is). We have the Dominator shrouds in our SS and modified and love them, they seem to be bulletproof with the things we have put them through.
    #72W U.M.P Stock Car

  13. #13
    Join Date
    Dec 2007
    Location
    Red Dirt USA
    Posts
    1,024

    Default

    Quote Originally Posted by r3tracing View Post
    Kind of wondering where the horsepower thing came from myself
    Steve Hendren says a stock gm fan causes a 10-20 hp loss on his chassis dyno when dynoing a 604 crate motor. He now advocates a 2 blade version with the same pitch.

  14. #14
    Join Date
    Dec 2007
    Location
    Red Dirt USA
    Posts
    1,024

    Default

    I stand corrected. After re-reading the article on Crate Insider it is a 15hp loss at the rear wheels vs no fan. I know that wont win you a race but every little bit helps, esp. when racing crates.

Bookmarks

Posting Permissions

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

All times are GMT -5. The time now is 04:27 AM.


Powered by vBulletin® Version 4.2.0
Copyright © 2024 vBulletin Solutions, Inc. All rights reserved.