underdrive pulley????? not sure what to do
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds

Cadillac Technical Archive | Cadillac Dealers | Cadillac Reviews | Cadillac Dealer Reviews | Cadillac Vendors

CadillacForums.com is the premier Cadillac Forum on the internet. Registered Users do not see the above ads.
+ Reply to Thread
Results 1 to 6 of 6
2004-2007 Cadillac CTS-V Performance Mods Discussion, underdrive pulley????? not sure what to do in Cadillac CTS-V Series Forum - 2004 - 2007; i have read alot of posts about this but.... i found someone who is selling an ati 25% (i really ...
  1. #1
    atoler27 is offline Cadillac Owners Member
    Automobile(s): cts-v
    Join Date
    Jul 2010
    Posts
    40

    underdrive pulley????? not sure what to do

    i have read alot of posts about this but....

    i found someone who is selling an ati 25% (i really wanted a 10%) for a really good price.... but im kinda scared from reading some of the cons and i wanted to ask you guys if its really not worth it....

    thanks


  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    Zo6PwRd Guest

    Re: underdrive pulley????? not sure what to do

    unless your doing a cam i wouldnt waste your money, your only gonna gain maybe 5-8hp. I wont do one on the V because i worry about all the electrical stuff we have in the V and i dont wanna underpower it.

  4. #3
    Naf's Avatar
    Naf
    Naf is offline Cadillac Owners Connoisseur
    Join Date
    Apr 2007
    Posts
    2,090

    Re: underdrive pulley????? not sure what to do

    Dont worry about the amperage...You will get plenty of chargin power. I made the mistake of puttin a small alt pulley and i was spikin on my power..16-18v all the time. My fuel pressure was through the roof 70-90psi made tunin near impossible

  5. Remove Advertisements
    Cadillac Forums
    Advertisements
     

  6. #4
    PISNUOFF Guest

    Re: underdrive pulley????? not sure what to do

    I run a 25% UD pulley and haven't had any issues whatsoever. Charging is fine and A/C is ice cold. I did not change any other pulleys either.

  7. #5
    verywhitedevil's Avatar
    verywhitedevil is offline Cadillac Owners Enthusiast
    Automobile(s): 05 CTS V
    Join Date
    Feb 2009
    Location
    Tempe, AZ
    Posts
    600

    Re: underdrive pulley????? not sure what to do

    @NAF - wouldn't you oversize the alternator pulley to offset the underdrive pulley?? what size is the stock alternator pulley??

    I have the 10% ATI and wanted to oversize the alternator pulley by 10% or am I looking to overdrive the pulley 3/4"?? Am I thinking in the right direction?

    I plan on installing with the cam, per suggestions.

    sorry to jack the thread, but could be useful information for you.

  8. #6
    Naf's Avatar
    Naf
    Naf is offline Cadillac Owners Connoisseur
    Join Date
    Apr 2007
    Posts
    2,090

    Re: underdrive pulley????? not sure what to do

    Actually you want to go the other way..You want a smaller alt pulley to speed it up and give you more juice...

    I think the stock one is 50mm or 75mm, cant remember, but i installed one that was 25mm and DAMN too much current..

    if you want to spin it more, install a smaller pulley, if you want to spin it less put a bigger pulley...

    Belt size will be your next issue, have funn with that

  9. Remove Advertisements
    Cadillac Forums
    Advertisements
     

+ Reply to Thread

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.

What Cadillac(s) do you own? (Or type NONE)

Please select your insurance company (Optional)

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Bookmarks

Cadillac Posting Rules

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