exhaust manifolds: Log vs tubular - Turbo Dodge Forums : Turbo Dodge Forum for Turbo Mopars, Shelbys, Dodge Daytona, Dodge SRT-4, Chrysler PT Cruiser, Omni and more!
TurboDodge.com MarketPlace Shelby Registry Contact Us

Advertisement - Remove these ads today by clicking here.
Go Back   Turbo Dodge Forums : Turbo Dodge Forum for Turbo Mopars, Shelbys, Dodge Daytona, Dodge SRT-4, Chrysler PT Cruiser, Omni and more! > Turbo Dodge Technical Chat > Engine - General, Exhaust & Induction

Engine - General, Exhaust & Induction Topics about the general engine items, exhaust system discussed here & Improving the intake tract - air filter to intake valve.

Reply
 
LinkBack Thread Tools
Old 02-26-2013, 03:22 PM   #1
exhaust manifolds: Log vs tubular  
Garrett Booster
 
Join Date: May 2004
Location: Beloit, Wisconsin

My Ride: 1985 Glh-T Omni
Induct: Turbo
1/4: 0.000

Posts: 224
Feedback: (0)
85glhomni is keeping the peace
Anyone have real world numbers on these such as a before and after or a direct comparison as far as power? Brands VS Brands or type VS type?
85glhomni is offline  
Reply With Quote Quick reply to this message Share on facebook
Sponsored Links
Advertisement
 
Old 02-27-2013, 12:35 AM   #2
Re: exhaust manifolds: Log vs tubular  
Super Pope

 
The Pope's Avatar
 
Join Date: Mar 2003
Location: Spokane WA

Induct: Turbo
1/4: 0.000

Posts: 9,926
Feedback: (10)
Images: 5
The Pope has really helped outThe Pope has really helped out
Quote:
Originally Posted by 85glhomni View Post
Anyone have real world numbers on these such as a before and after or a direct comparison as far as power? Brands VS Brands or type VS type?
the fastest 8v turbo Dodge runs a ported stock manifold.

As far as flow goes I've tested a tube header with a 1.5" primary tube and it flows worse than a ported stocker. Also tested a cast log TU custom header and it really flows well, 35 CFM per exhaust port more than the other 2.
The Pope is online now  
Reply With Quote Quick reply to this message
Old 02-27-2013, 06:37 AM   #3
Re: exhaust manifolds: Log vs tubular  
Hybrid Booster
 
Join Date: Apr 2004
Location: Canandaigua N.Y.

My Ride: 87 CSX#193/ Daytona
Engine: 2.2 Turbo
Induct: Turbo
1/4: 0.000

Posts: 1,456
Feedback: (4)
turbot11 is keeping the peace
It's not tublar but I am running a TBI header on my Omni:





It sucks. Was a neat idea, and fun to build, but spool up takes FOREVER. It would be good if the motor was spinning at 9000 RPM all the time, but for street use it is FAR less than ideal, I will be going back to a ported log this spring.
turbot11 is offline  
Reply With Quote Quick reply to this message
Old 02-27-2013, 06:55 AM   #4
Re: exhaust manifolds: Log vs tubular  
TD Extreme User!
 
Join Date: Apr 2004
Location: Mesa, AZ.

1/4: 0.000

Posts: 11,542
Feedback: (59)
tryingbe is keeping our cars running
Quote:
Originally Posted by turbot11 View Post
It sucks. Was a neat idea, and fun to build, but spool up takes FOREVER. It would be good if the motor was spinning at 9000 RPM all the time, but for street use it is FAR less than ideal, I will be going back to a ported log this spring.
Are you running a 2.2 or 2.5? Did you notice any top end gain?
tryingbe is offline  
Reply With Quote Quick reply to this message
Old 02-27-2013, 07:15 AM   #5
Re: exhaust manifolds: Log vs tubular  
Hybrid Booster
 
Join Date: Apr 2004
Location: Canandaigua N.Y.

My Ride: 87 CSX#193/ Daytona
Engine: 2.2 Turbo
Induct: Turbo
1/4: 0.000

Posts: 1,456
Feedback: (4)
turbot11 is keeping the peace
It's a common block 2.2, my goal has been to sort of duplicate a super 60 setup. The turbo is slightly bigger than a super 60 and would a little better suited to take advantage of a 2.5. However it should spin up MUCH better than it does on the 2.2. Top end is the only place that it begins to do anything. Granted I had some swingvalve issues to work out but even after they were corrected it was a dog until 4000+ RPM
turbot11 is offline  
Reply With Quote Quick reply to this message
Old 02-27-2013, 07:20 AM   #6
Re: exhaust manifolds: Log vs tubular  
TD Extreme User!
 
Join Date: Apr 2004
Location: Mesa, AZ.

1/4: 0.000

Posts: 11,542
Feedback: (59)
tryingbe is keeping our cars running
My 2.2L with TBI header + TII turbo machined for T04E 50 trim and stage III turbine wheel have full boost (12psi) by 3500rpm. It does have a ported head though.
tryingbe is offline  
Reply With Quote Quick reply to this message
Old 02-27-2013, 07:37 AM   #7
Re: exhaust manifolds: Log vs tubular  
Hybrid Booster
 
Join Date: Apr 2004
Location: Canandaigua N.Y.

My Ride: 87 CSX#193/ Daytona
Engine: 2.2 Turbo
Induct: Turbo
1/4: 0.000

Posts: 1,456
Feedback: (4)
turbot11 is keeping the peace
I have a ported head and matching manifolds too. Wish mine spun up that fast it just doesnt seem to have enough gas flow till after 4000. I'm going to go to ported log and a better SV this spring and see how that works
turbot11 is offline  
Reply With Quote Quick reply to this message
Old 02-27-2013, 01:05 PM   #8
Re: exhaust manifolds: Log vs tubular  
Garrett Booster
 
Join Date: May 2004
Location: Beloit, Wisconsin

My Ride: 1985 Glh-T Omni
Induct: Turbo
1/4: 0.000

Posts: 224
Feedback: (0)
85glhomni is keeping the peace
Any clearance issues on the omni with that TBI header. It looks like the turbo and wastegate actuator are sitting out a bit.(just curious). I
85glhomni is offline  
Reply With Quote Quick reply to this message
Old 02-27-2013, 04:32 PM   #9
Re: exhaust manifolds: Log vs tubular  
TD Hardcore User!
 
Join Date: May 2007
Location: Long Island

My Ride: Daytonas
1/4: 0.000

Posts: 2,853
Feedback: (12)
ChargedDust is keeping our cars running
Quote:
Originally Posted by turbot11 View Post
It sucks. Was a neat idea, and fun to build, but spool up takes FOREVER.
Is that a .63 A/R turbine housing?
ChargedDust is offline  
Reply With Quote Quick reply to this message
Old 02-27-2013, 08:08 PM   #10
Re: exhaust manifolds: Log vs tubular  
Hybrid Booster
 
Join Date: Apr 2004
Location: Canandaigua N.Y.

My Ride: 87 CSX#193/ Daytona
Engine: 2.2 Turbo
Induct: Turbo
1/4: 0.000

Posts: 1,456
Feedback: (4)
turbot11 is keeping the peace
Quote:
Is that a .63 A/R turbine housing?
Almost! .64 A/R on the hot side
turbot11 is offline  
Reply With Quote Quick reply to this message
Old 02-27-2013, 08:18 PM   #11
Re: exhaust manifolds: Log vs tubular  
Hybrid Booster
 
Join Date: Apr 2004
Location: Canandaigua N.Y.

My Ride: 87 CSX#193/ Daytona
Engine: 2.2 Turbo
Induct: Turbo
1/4: 0.000

Posts: 1,456
Feedback: (4)
turbot11 is keeping the peace
Quote:
Originally Posted by 85glhomni View Post
Any clearance issues on the omni with that TBI header. It looks like the turbo and wastegate actuator are sitting out a bit.(just curious). I
Acutally it fits!










The pic in the above post, the wastegate is only loosely bolted onto the compressor housing with one bolt. The motor was just being test fitted into the bay when that pic was taken, lol
turbot11 is offline  
Reply With Quote Quick reply to this message
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:

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

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




Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.3.2

All times are GMT -5. The time now is 02:16 AM.