7mpg average! Help if anyone can. - Page 2
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
Page 2 of 2 FirstFirst 1 2
Results 16 to 26 of 26
HT4100 4.1, 4.5, 4.9 Discussion, 7mpg average! Help if anyone can. in Cadillac Engine Technical Discussion; would a flomaster highflow cat help? and should i replace the rest of the exhaust while im at it?...
  1. #16
    quins90lac's Avatar
    quins90lac is offline Cadillac Owners Enthusiast
    Automobile(s): 1990 Cadillac sedan devile
    Join Date
    May 2008
    Location
    Peoria IL USA
    Age
    32
    Posts
    616

    Re: 7mpg average! Help if anyone can.

    would a flomaster highflow cat help? and should i replace the rest of the exhaust while im at it?

  2. #17
    Forgoten214's Avatar
    Forgoten214 is offline Cadillac Owners Enthusiast
    Automobile(s): 1992 Sedan DeVille
    Join Date
    Aug 2010
    Location
    Northeast PA
    Posts
    819

    Re: 7mpg average! Help if anyone can.

    Quote Originally Posted by quins90lac View Post
    would a flomaster highflow cat help? and should i replace the rest of the exhaust while im at it?
    http://www.magnaflow.com/02catalytic...irectfit=23223

  3. #18
    quins90lac's Avatar
    quins90lac is offline Cadillac Owners Enthusiast
    Automobile(s): 1990 Cadillac sedan devile
    Join Date
    May 2008
    Location
    Peoria IL USA
    Age
    32
    Posts
    616

    Re: 7mpg average! Help if anyone can.

    this is a better deal just have to have a welder. http://shop.advanceautoparts.com/web...S_867077544___

  4. #19
    Forgoten214's Avatar
    Forgoten214 is offline Cadillac Owners Enthusiast
    Automobile(s): 1992 Sedan DeVille
    Join Date
    Aug 2010
    Location
    Northeast PA
    Posts
    819

    Re: 7mpg average! Help if anyone can.

    That's the universal one though not the direct fit made for your car.

  5. #20
    the recluse is offline Cadillac Owners Connoisseur
    Automobile(s): 2002 STS, 1991 Eldorado
    Join Date
    Feb 2009
    Location
    Jacksonville, FL
    Posts
    1,016

    Re: 7mpg average! Help if anyone can.

    Quote Originally Posted by Forgoten214 View Post
    That's the universal one though not the direct fit made for your car.
    I just reamed mine out and put it back up, that's about as high flow as you can get

    Opens the sound of the exhaust right up....

  6. #21
    Forgoten214's Avatar
    Forgoten214 is offline Cadillac Owners Enthusiast
    Automobile(s): 1992 Sedan DeVille
    Join Date
    Aug 2010
    Location
    Northeast PA
    Posts
    819

    Re: 7mpg average! Help if anyone can.

    Really? Do you happen to have a sound clip?

    I've wanted to hear what a 4.5 or 4.9 sounds like with a aftermarket setup. I bet it sounds awesome.

  7. #22
    quins90lac's Avatar
    quins90lac is offline Cadillac Owners Enthusiast
    Automobile(s): 1990 Cadillac sedan devile
    Join Date
    May 2008
    Location
    Peoria IL USA
    Age
    32
    Posts
    616

    Re: 7mpg average! Help if anyone can.

    thought about stuffing mine with heavy duty steal-wool. and right now its got a cherybomb turbo muffler should sound nice.

  8. #23
    Sevillian273's Avatar
    Sevillian273 is offline Cadillac Owners Connoisseur
    Automobile(s): 69 Thunderbird | 90 Seville | 89 Marquis | 72 Torino
    Join Date
    Oct 2008
    Location
    Palm Bay, FL
    Posts
    2,022

    Re: 7mpg average! Help if anyone can.

    Quote Originally Posted by Forgoten214 View Post
    Really? Do you happen to have a sound clip?

    I've wanted to hear what a 4.5 or 4.9 sounds like with a aftermarket setup. I bet it sounds awesome.


    Flowmaster 80 series, no cat. Its fun for a while but the droning gets old quick.

  9. #24
    Forgoten214's Avatar
    Forgoten214 is offline Cadillac Owners Enthusiast
    Automobile(s): 1992 Sedan DeVille
    Join Date
    Aug 2010
    Location
    Northeast PA
    Posts
    819

    Re: 7mpg average! Help if anyone can.

    Quote Originally Posted by Sevillian273 View Post


    Flowmaster 80 series, no cat. Its fun for a while but the droning gets old quick.
    Hmm doesn't sound too loud. You get alot of droning?

    I heard Magnaflow isn't as bad from inside the cabin.

  10. #25
    the recluse is offline Cadillac Owners Connoisseur
    Automobile(s): 2002 STS, 1991 Eldorado
    Join Date
    Feb 2009
    Location
    Jacksonville, FL
    Posts
    1,016

    Re: 7mpg average! Help if anyone can.

    Quote Originally Posted by Forgoten214 View Post
    Really? Do you happen to have a sound clip?

    I've wanted to hear what a 4.5 or 4.9 sounds like with a aftermarket setup. I bet it sounds awesome.
    I took my stock cat down and opened it up, then stuck it back up. That alone open up the sound of the exhaust, but not to the point where I don't like it.

  11. #26
    Sevillian273's Avatar
    Sevillian273 is offline Cadillac Owners Connoisseur
    Automobile(s): 69 Thunderbird | 90 Seville | 89 Marquis | 72 Torino
    Join Date
    Oct 2008
    Location
    Palm Bay, FL
    Posts
    2,022

    Re: 7mpg average! Help if anyone can.

    Quote Originally Posted by Forgoten214 View Post
    Hmm doesn't sound too loud. You get alot of droning?

    I heard Magnaflow isn't as bad from inside the cabin.
    The droning is nothing compared to a glasspack but its there. IMO the sound with the Flowmaster and no cat is just too abrasive for everyday driving. It def had a great idle sound though. It drew alot of attention.

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