Interesting data
Cadillac
 

Cadillac Forums | Help Us Help You | Advertise | Cadillac Parts | Cadillac News | Cadillac Classifieds / (Old System)

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 3 of 3
Northstar Engines and System Technical Discussion Discussion, Interesting data in Cadillac Engine Technical Discussion; So I have this chip that is supposed to record data through the OBDII connection on my DTS. Well I've ...
  1. #1
    LymanSS is offline Cadillac Owners Fanatic
    Join Date
    Feb 2003
    Age
    34
    Posts
    120

    Interesting data

    So I have this chip that is supposed to record data through the OBDII connection on my DTS. Well I've had it recording throttle position, speed, Manifold pressure, etc etc. One oddity that I've noticed is that at full throttle, the manifold pressure never gets past 10.4 psi. My vette on the other hand comes closer to 14.5, which is almost atmospheric. If the caddy is only seeing 10.4 psi in the manifold, that should mean that there is a SERIOUS restriction somewhere upstream. That would be either the filter/intake assembly, the MAF sensor, or the throttle body. If we could eliminate this restriction, we should be able to see an significant improvement in power. I'm going to hook my laptop up to the car and see if I can come up with a more detailed set of data. Any thoughts would be appreciated.

    Scott

  2. Remove Advertisements
    CadillacForums.com
    Advertisements
     

  3. #2
    LymanSS is offline Cadillac Owners Fanatic
    Join Date
    Feb 2003
    Age
    34
    Posts
    120
    Thread Starter
    I just went out and tried to log some data with my autotap data logger, but the software blows, and it didn't record anything. After a beautiful 0-90 mph run, I come back empty handed. I guess I'll try again tomorrow.

    Scott

  4. #3
    Katshot's Avatar
    Katshot is offline Cadillac Owners Master
    Join Date
    Jan 2003
    Location
    Newtown, PA
    Age
    55
    Posts
    6,472
    Good info for sure. It does simply illustrate the difference in intake restriction between a 'Vette and a Caddy, which I would hope doesn't come as too much of a surprise to anyone.

Quick Reply Quick Reply

Register Now

Please enter the name by which you would like to log-in and be known on this site.
If you do not want to register, fill this field only and the name will be used as user name for your post.

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

Please enter a valid email address for yourself.

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
Read about Lincoln | Buick | Kia Forte Forum
Need products for your Cadillac? Check out your options at the links below:

custom floor mats | Cadillac Chrome and Black Chrome Wheels | window tinting