2.5" Exhaust Downpipe? - Turbo Dodge Forums : Turbo Dodge Forum for Turbo Mopars, Shelbys, Dodge Daytona, Dodge SRT-4, Chrysler PT Cruiser, Omni and more!
Engine - General, Exhaust & Induction Topics about the general engine items, exhaust system discussed here & Improving the intake tract - air filter to intake valve.

 
LinkBack Thread Tools
post #1 of 8 Old 02-23-2013, 08:01 PM Thread Starter
Boostaholic
 
Join Date: Nov 2010
Location: Allentown, PA
 
My Ride: 1985 Daytona Turbo Z
Induct: Turbo
1/4: 0.000

Posts: 310
Thanks: 0
Thanked 0 Times in 0 Posts
 
2.5" Exhaust Downpipe?

Middle of a TII swap on my '85 Daytona. Since the '85 came with 2.25" exhaust and the TIIs were 2.5", do I need to find a 2.5" downpipe for the conversion? Didn't see it mentioned in any of the write-ups on the subject, so a bit confused.

Thanks.
ljeff20 is offline  
Sponsored Links
Advertisement
 
post #2 of 8 Old 02-23-2013, 09:23 PM
TD New Guy
 
Join Date: Apr 2010
Location: Det,Michigan
 
My Ride: 85 Lebaron convert
Engine: 2.2 T1
Induct: Turbo
1/4: 0.000

Posts: 28
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: 2.5" Exhaust Downpipe?

if you are not using the TI turbo and you bought a T II turbo from 89-90 you might need to use a 2.5 downpipe
superskasteve is offline  
post #3 of 8 Old 02-23-2013, 09:35 PM Thread Starter
Boostaholic
 
Join Date: Nov 2010
Location: Allentown, PA
 
My Ride: 1985 Daytona Turbo Z
Induct: Turbo
1/4: 0.000

Posts: 310
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: 2.5" Exhaust Downpipe?

That's what I thought. I got all the TII parts from a donor vehicle, so will start looking for a downpipe. Thanks.
ljeff20 is offline  
post #4 of 8 Old 02-24-2013, 07:40 AM
Boostaholic
 
Join Date: Jun 2004
Location: Waverley, Nova Scotia Canada
 
My Ride: 93' Turbo Duster
Engine: 2.5L T2/S60
Induct: Turbo
1/4: 13.554

Posts: 838
Images: 14
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: 2.5" Exhaust Downpipe?

What year is the t2? Anything 88 and up use a wider flange on the downpipe not sure but maybe you could inlarge the holes and use washers.
d_snook6 is offline  
post #5 of 8 Old 02-24-2013, 07:44 AM
- OFFICIAL GEARHEAD -

 
Join Date: Jun 2004
Location: Houghton MI !frosty nights!
 
My Ride: Ram HFE/Omni/SL/XR7
Engine: 2.5 TII, SMEC, .60/.63, 2-piece, 52mm, no B/S ;)
Induct: Turbo
1/4: 13.800

Posts: 8,332
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: 2.5" Exhaust Downpipe?

the '86-8 "TII" all used a 2.25" SV & DP ;
the '89 TII Only (there was no '90 TII) used the 2.5" SV & DP

all 89+ TI/TIII/IV used a 2.5" DP ..
detobias is offline  
post #6 of 8 Old 02-24-2013, 12:32 PM Thread Starter
Boostaholic
 
Join Date: Nov 2010
Location: Allentown, PA
 
My Ride: 1985 Daytona Turbo Z
Induct: Turbo
1/4: 0.000

Posts: 310
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: 2.5" Exhaust Downpipe?

Quote:
Originally Posted by detobias View Post
the '86-8 "TII" all used a 2.25" SV & DP ;
the '89 TII Only (there was no '90 TII) used the 2.5" SV & DP

all 89+ TI/TIII/IV used a 2.5" DP ..
Mine came from an '88 Daytona Shelby Z. So, the 2.25" I already have should work?
ljeff20 is offline  
post #7 of 8 Old 02-24-2013, 04:09 PM
- OFFICIAL GEARHEAD -

 
Join Date: Jun 2004
Location: Houghton MI !frosty nights!
 
My Ride: Ram HFE/Omni/SL/XR7
Engine: 2.5 TII, SMEC, .60/.63, 2-piece, 52mm, no B/S ;)
Induct: Turbo
1/4: 13.800

Posts: 8,332
Thanks: 0
Thanked 0 Times in 0 Posts
 
Re: 2.5" Exhaust Downpipe?

yes but you will need to enlarge the bolt holes quite a bit on the downpipe flange to accommodate the "wide flange" SV ('88-up)

get the die grinder out :)
detobias is offline  
post #8 of 8 Old 02-25-2013, 11:47 AM
Super Pope

 
The Pope's Avatar
 
Join Date: Mar 2003
Location: Spokane WA
 
Induct: Turbo
1/4: 0.000

Posts: 10,011
Images: 5
Thanks: 0
Thanked 0 Times in 0 Posts
   
Re: 2.5" Exhaust Downpipe?

having a wide 88 flange SV I would consider the 2.5" exhaust, makes a ton of difference on the older cars with little exhaust.
The Pope is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Turbo Dodge Forums : Turbo Dodge Forum for Turbo Mopars, Shelbys, Dodge Daytona, Dodge SRT-4, Chrysler PT Cruiser, Omni and more! forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

Member names may only be composed of alpha-numeric characters. (A-Z and 0-9)

!!ATTENTION ADVERTISERS!! If you intend on advertising anything on this forum, whatsoever, you are required to first contact us here . Additionaly, we do NOT allow BUSINESS NAMES unless you are an Authorized Vendor. If you own a business, and want to do sales on this site via posting or private message, you will need to follow the rules. Shops, Stores, Distributors, Group Buys without being authorized will see your account terminated.

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

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

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.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome