Intake and Exhaust manifold swap on 2.7 - DodgeIntrepid.Net Forums - Dodge Intrepid, Concorde, 300m and Eagle Vision chat
Reply
 
LinkBack Thread Tools Rating: Thread Rating: 5 votes, 5.00 average. Display Modes
post #1 of 56 (permalink) Old 02-24-2012, 10:54 AM Thread Starter
Intrepid Fan
 
Dirdy's Avatar
 
Join Date: Aug 2011
Location: Fowlerville, MI
Posts: 227
Feedback: 0 / 0%
                     
Pics throughout post. Scroll and you shall see.

I was psyched to find a complete Charger/Magnum 2.7 intake and the exhaust manifolds on eGay for cheap. Its great when someone doesn't list an item correctly.

For those who wondered if the Charger intake would fit under the hood, it doesn't. But it will with a little help.

For those who wondered if the Charger exhaust manifolds will fit, they will. Of course you'll need to modify the down pipes. (They will definitely require moving or deleting the stock cats)

I have my engine, and car, ripped apart for the normal high mileage maintenance.
  • timing chain
  • water pump
  • valve seals
  • oil pan gasket
  • front brakes
  • front bushings
  • front struts
  • front bearings
  • sub frame bushings
  • and the cooling fans burned up

I'm also doing the exhaust while its apart. True 2 1/4" duals through a homemade muffler and Flowtech Purple Hornies in the back. O2s, plugs, coil boots, thermostat, ect. May replace the oil pump.

The original tie-rod ends and ball-joints are still in great shape. I'm not replacing factory joints if they are still good. The original cv shafts are still fine too. I just had one apart last summer for a ripped boot and it looked great yet.

Back to the intake and exhaust. I'm not looking to make more power. It is a 2.7. But if I can make it more drivable and get some more gas mileage out of it... Plus the exhaust will definitely sound unique.

The exhaust is self explanatory. Look at the stock log manifold. It has a tight u-turn in it. The charger manifolds are a real tri-y style. They flow much more smoothly out of the head and down to the collector. I'm also taking out my burned up cats. I'll put one on later. That'll free up a lot of restriction in the exhaust.

The intake, well, its crap. Its designed for high rpm flow. How often are you driving around at 4k rpm or higher? The charger intake has really long sweeping runners. This allows more low end flow when you hit the gas. The log chamber with a long run from the throttle body will also aid in low end. The reason Chargers have "less power" is because of the intake they use. They basically took away from the peak hp, and gave the engine a broader torque band. So this makes the car more drive-able.

Few issues you run into with the intake. First, the butterfly valve on the end will need to be taken out. Second, the hood hits. Its not as bad as it sounds. If I chop the front of the intake and epoxy a cap on it, it should clear. The worst I have to do is slice a brace in the hood to gain more clearance. The intake also just barely touches the bottom edge of the cowl. Taking a rib off the intake and maybe a few good whacks with a block and hammer to the cowl will clear that up. The biggest issue is probably the throttle body. The charger throttle body is drive-by-wire. I'm not fitting an electric throttle into this car. I dug into my pile of throttle bodies and found an exact fit. A tb off of a '98 Ford 5.4 bolts right in place. No modifications. Its 70mm with a tps on the opposite end. It also matches the bore of the intake. I already found the stock tps and the ford one use the same values so its just replacing the connector on the stock harness.

Pics coming soon.

Last edited by Dirdy; 04-13-2012 at 01:55 AM.
Dirdy is offline  
Sponsored Links
Advertisement
 
post #2 of 56 (permalink) Old 02-24-2012, 11:10 AM
1st Gen FTW - It's AutoMedic!

 
cdmccul's Avatar
 
Join Date: Jun 2008
Location: Garrison, ND
Posts: 15,412
Feedback: 18 / 100%
                     
WOW! MORE MORE MORE! Great stuff!
cdmccul is offline  
post #3 of 56 (permalink) Old 02-24-2012, 11:27 AM
Intrepid Modder
 
Join Date: Nov 2010
Location: USA
Posts: 407
Feedback: -1 / 0%
                 
Well if your aiming for a unique Trep, you're clearly on your way!

Must see pictures!
UPGI2AYDD is offline  
post #4 of 56 (permalink) Old 02-24-2012, 11:49 AM
Farticcus of Plenticcus
 
shadowvox6's Avatar
 
Join Date: Sep 2003
Location: 39.199138,-84.669778
Posts: 17,030
Feedback: 18 / 100%
                     
Damn fine job...get some pics of the 2.7 LX manifolds installed...I am sure Squilly will want to see that!!
shadowvox6 is offline  
post #5 of 56 (permalink) Old 02-24-2012, 12:10 PM
Intrepid Pro
 
Squilliam's Avatar
 
Join Date: Nov 2008
Location: Greater Pittsburgh, PA
Posts: 15,038
Feedback: 2 / 100%
                     
Quote:
Originally Posted by shadowvox6 View Post
Damn fine job...get some pics of the 2.7 LX manifolds installed...I am sure Squilly will want to see that!!
Damn straight I would! I couldve sworn somebody said that theres no clearance which is why Im trying to adapt 1G 3.3 headers on mine. But if you found out that they fit, well damn! I will be keeping my plenum though, lol

Sent from my MB860 using AutoGuide.com App
Squilliam is offline  
post #6 of 56 (permalink) Old 02-24-2012, 12:34 PM
Intrepid Modder
 
Join Date: Nov 2010
Location: USA
Posts: 407
Feedback: -1 / 0%
                 
Thinking what I read over, what are the major "losses" in power with the charger plenum, top speed or just pick up?

May just do what Sqully's doing and pimp my 2.7 versus dropping a 3.5 in.. With gas jumping in prices the 3.5 looks spookey. Ironically, I found a 03 3.5 for my car the other day for $500.
UPGI2AYDD is offline  
post #7 of 56 (permalink) Old 02-24-2012, 01:55 PM
1st Gen FTW - It's AutoMedic!

 
cdmccul's Avatar
 
Join Date: Jun 2008
Location: Garrison, ND
Posts: 15,412
Feedback: 18 / 100%
                     
Is the 2.7 REALLY that much more efficient than a properly driven 3.5? For $500, you'd be a fool to not at least pick it up for a spare... wow
cdmccul is offline  
post #8 of 56 (permalink) Old 02-24-2012, 02:28 PM
Intrepid Pro
 
DjGreggieP's Avatar
 
Join Date: Apr 2008
Location: Saskatchewan Canada
Posts: 4,073
Feedback: 1 / 100%
                     
I third the motion of the Charger 2.7 manifolds, this could awaken my third 2.7 lol
DjGreggieP is offline  
post #9 of 56 (permalink) Old 02-24-2012, 03:01 PM
Intrepid Pro
 
Squilliam's Avatar
 
Join Date: Nov 2008
Location: Greater Pittsburgh, PA
Posts: 15,038
Feedback: 2 / 100%
                     
Quote:
Originally Posted by cdmccul View Post
Is the 2.7 REALLY that much more efficient than a properly driven 3.5? For $500, you'd be a fool to not at least pick it up for a spare... wow
Im not doing it for efficiency. Im doing it for sheer uniqueness, which has been a staple of my car since I got it. Im the first one to run a Special PCM with a 2.7 and i would like to be the first to moderately beef one up too.

Sent from my MB860 using AutoGuide.com App
Squilliam is offline  
post #10 of 56 (permalink) Old 02-24-2012, 03:40 PM
1st Gen FTW - It's AutoMedic!

 
cdmccul's Avatar
 
Join Date: Jun 2008
Location: Garrison, ND
Posts: 15,412
Feedback: 18 / 100%
                     
I was talking about UP's post about how the price of gas is going up.
cdmccul is offline  
post #11 of 56 (permalink) Old 02-24-2012, 05:11 PM Thread Starter
Intrepid Fan
 
Dirdy's Avatar
 
Join Date: Aug 2011
Location: Fowlerville, MI
Posts: 227
Feedback: 0 / 0%
                     
Quote:
Originally Posted by UPGI2AYDD View Post
Thinking what I read over, what are the major "losses" in power with the charger plenum, top speed or just pick up?

May just do what Sqully's doing and pimp my 2.7 versus dropping a 3.5 in.. With gas jumping in prices the 3.5 looks spookey. Ironically, I found a 03 3.5 for my car the other day for $500.
Loss in peak HP on paper. Look up the numbers for Intrepid/Sebring 2.7s and the Charger/Magnum 2.7. I was getting 30mpg average before I ran cleaner through my engine and it started to really burn oil. If that 3.5 is complete and ready to go, I'd jump on it too.

Here they talk about the numbers change http://en.wikipedia.org/wiki/Chrysler_LH_engine
Which is because of the different intake and exhaust they put on the engine. The rest of the engine is the same, except for a slight boost in compression on the LX platform.

You'll see the talk about sludge in the lower part of the page. I have plans for this as well. A catch can for the breather set up and doing away with the EGR. I also thought about doing a crankcase evac set-up. Just want to eliminate anymore oil getting sucked though the engine. Its pretty nasty looking.
Dirdy is offline  
post #12 of 56 (permalink) Old 02-24-2012, 08:21 PM
Intrepid Pro
 
DjGreggieP's Avatar
 
Join Date: Apr 2008
Location: Saskatchewan Canada
Posts: 4,073
Feedback: 1 / 100%
                     
Quote:
Originally Posted by Squilliam View Post
Im not doing it for efficiency. Im doing it for sheer uniqueness, which has been a staple of my car since I got it. Im the first one to run a Special PCM with a 2.7 and i would like to be the first to moderately beef one up too.

Sent from my MB860 using AutoGuide.com App
I am a strange cat, I like being unique, but doing it 'properly' I guess? You know, if your going to do something, do it all? I want to build a 2.7l that has been both beefed up externally, as well as internally (different pistons, connecting rods etc..) increase the efficiency of the engine at the same time as increasing the power mildly.

But as I said, Im just strange haha
DjGreggieP is offline  
post #13 of 56 (permalink) Old 02-25-2012, 01:31 PM
Intrepid Modder
 
Join Date: Aug 2007
Location: Peru, IN
Posts: 715
Feedback: 0 / 0%
                     
*stolen directly from allpar.com

"In 2004, the 2.7 liter engine was modified for the LX series to produce more low-speed torque at launch and during mid-range operation for strong performance in everyday driving. The engine produced 190 hp at 6400 rpm, and 190 lb.-ft. of torque at 4000 rpm. This was done by using a new active dual-plenum intake manifold tuned for improved low-speed torque.

The manifold included a manifold tuning valve added to low-speed torque — increasing part-throttle torque by 8-10% in the primary driving range of 2100 to 3400 rpm, giving better performance in normal driving; and also adding to torque under full throttle. "
ksa8907 is offline  
post #14 of 56 (permalink) Old 02-29-2012, 12:46 PM Thread Starter
Intrepid Fan
 
Dirdy's Avatar
 
Join Date: Aug 2011
Location: Fowlerville, MI
Posts: 227
Feedback: 0 / 0%
                     
Well, I have the intake from a Magnum so it did come with the tuning valve. Can't be that hard to wire to a switch inside. But, theres that damn hood clearance problem. This is with the valve off.





What the hell. I'll chop the hood. I looked around for hood bumps to weld in with no luck. So, I'm deciding on a differential cover to make the bump. It'll end up looking like the DSM bump. Hey, they are cousins. Theirs is to clear the timing belt, mines to clear the manifold tuning valve(that does sound a little gay).

I've had bad luck getting to working on this damn car. After I'm done typing this I'm back at it.
Dirdy is offline  
post #15 of 56 (permalink) Old 02-29-2012, 01:42 PM
1st Gen FTW - It's AutoMedic!

 
cdmccul's Avatar
 
Join Date: Jun 2008
Location: Garrison, ND
Posts: 15,412
Feedback: 18 / 100%
                     
Looks like a fun mod!
cdmccul is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the DodgeIntrepid.Net Forums - Dodge Intrepid, Concorde, 300m and Eagle Vision chat 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
Display Modes Rate This Thread
Linear Mode Linear Mode
Rate This Thread:



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