turbo 2.5 - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ General Discussion Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 05-09-2012, 11:48 AM   #1
Jeeper
 
tj v. xj's Avatar
 
Join Date: Apr 2012
Posts: 112
turbo 2.5

Thinking about putting a turbo setup on my spare motor for my tj. Anyone done it without buying the kit? Heads already ported n polished. I'm thinking no bigger than a 30 trim. Was reading somewere that you can run stock fuel system to 4lbs of boost. Gonna try n just make a blow through setup on throttle body. Any info or suggestions would be nice.

__________________
97 tj 4" lift 33x13.50 toyo mt's
91 xj 5" lift 33x10.5 swamper tsl's
tj v. xj is offline   Quote Quick Reply
Old 05-09-2012, 12:25 PM   #2
Jeeper
 
Join Date: Jan 2012
Location: Wisconsin Dells
Posts: 117
Quote:
Originally Posted by tj v. xj View Post
Thinking about putting a turbo setup on my spare motor for my tj. Anyone done it without buying the kit? Heads already ported n polished. I'm thinking no bigger than a 30 trim. Was reading somewere that you can run stock fuel system to 4lbs of boost. Gonna try n just make a blow through setup on throttle body. Any info or suggestions would be nice.
Get a spare transmission to go with it (if AX-5 from factory).

toms01TJ is offline   Quote Quick Reply
Old 05-09-2012, 12:38 PM   #3
Jeeper
 
tj v. xj's Avatar
 
Join Date: Apr 2012
Posts: 112
Got plenty of Spare parts Haha. Trans getting swapped if fuel system won't work it'll get twins and head studs
__________________
97 tj 4" lift 33x13.50 toyo mt's
91 xj 5" lift 33x10.5 swamper tsl's
tj v. xj is offline   Quote Quick Reply
Old 05-09-2012, 12:44 PM   #4
Jeeper
 
Sherpa's Avatar
 
Join Date: Oct 2010
Location: Lehi, UT
Posts: 1,049
Quote:
Originally Posted by tj v. xj View Post
Was reading somewere that you can run stock fuel system to 4lbs of boost.
How would the stock 1-bar MAP sensor be able to tell the computer to supply the necessary additional fuel?

Quote:
Originally Posted by tj v. xj View Post
Any info or suggestions would be nice.
Read this book cover to cover at least twice before even lifting your hood.
__________________
Dempsey Bowling
My fleet: 91 Miata, 98 Wrangler Sport, 06 Mustang GT, 01 Suburban 8.1L, 14 Forte EX
Jeep mods: 4" longarm + 1" BL, 35" KM2s, 4.56s with dual ARBs... and lots of scratched armor
Sherpa is offline   Quote Quick Reply
Old 05-09-2012, 12:48 PM   #5
Jeeper
 
tj v. xj's Avatar
 
Join Date: Apr 2012
Posts: 112
They say it will adjust it enough up to 4 pounds on qboth
__________________
97 tj 4" lift 33x13.50 toyo mt's
91 xj 5" lift 33x10.5 swamper tsl's
tj v. xj is offline   Quote Quick Reply
Old 05-09-2012, 12:49 PM   #6
Jeeper
 
tj v. xj's Avatar
 
Join Date: Apr 2012
Posts: 112
...another forum. If not a local shop has a 3 bar for it. I don't need knowledge on boost. I have a blown hemi that makes 3500hp
__________________
97 tj 4" lift 33x13.50 toyo mt's
91 xj 5" lift 33x10.5 swamper tsl's
tj v. xj is offline   Quote Quick Reply
Old 05-09-2012, 12:52 PM   #7
Jeeper
 
tj v. xj's Avatar
 
Join Date: Apr 2012
Posts: 112
Like I said. This is just a fresh spare motor I have and I'm just gonna toy with it. Only takes an hour to have one motor out n.another in.
__________________
97 tj 4" lift 33x13.50 toyo mt's
91 xj 5" lift 33x10.5 swamper tsl's
tj v. xj is offline   Quote Quick Reply
Old 05-09-2012, 01:17 PM   #8
Jeeper
 
tj v. xj's Avatar
 
Join Date: Apr 2012
Posts: 112
Click image for larger version

Name:	ForumRunner_20120509_141702.jpg
Views:	88
Size:	101.8 KB
ID:	121145
__________________
97 tj 4" lift 33x13.50 toyo mt's
91 xj 5" lift 33x10.5 swamper tsl's
tj v. xj is offline   Quote Quick Reply
Old 05-09-2012, 02:41 PM   #9
Jeeper
 
Sherpa's Avatar
 
Join Date: Oct 2010
Location: Lehi, UT
Posts: 1,049
Quote:
Originally Posted by tj v. xj View Post
I don't need knowledge on boost.
Innocent questions: if you don't need knowledge on boost, why are you asking for advice on this forum? And, more importantly, why are you thinking of turbocharging a naturally-aspirated computer-controlled speed/density engine without modifying the fuel system to compensate?

Quote:
Originally Posted by tj v. xj View Post
I have a blown hemi that makes 3500hp
Good for you. Are the spark and fuel curves of that engine controlled by a 1-bar MAP sensor and an ECU programmed only for natural aspiration?
__________________
Dempsey Bowling
My fleet: 91 Miata, 98 Wrangler Sport, 06 Mustang GT, 01 Suburban 8.1L, 14 Forte EX
Jeep mods: 4" longarm + 1" BL, 35" KM2s, 4.56s with dual ARBs... and lots of scratched armor
Sherpa is offline   Quote Quick Reply
Old 05-09-2012, 05:41 PM   #10
Jeeper
 
tj v. xj's Avatar
 
Join Date: Apr 2012
Posts: 112
because i was looking for specs on if anyone has built their own header for turbo setup. and like i said, i found another forum and the guy was saying his stock fuel system would cophensate for up to 4lbs of boost, seeing if anyone else has had luck with it.
__________________
97 tj 4" lift 33x13.50 toyo mt's
91 xj 5" lift 33x10.5 swamper tsl's
tj v. xj is offline   Quote Quick Reply
Old 05-09-2012, 05:48 PM   #11
Jeeper
 
tj v. xj's Avatar
 
Join Date: Apr 2012
Posts: 112
My buddies 99 civic was good till 5 lbs. And 8900rpm. When we swapped to 3 bar it was good till 15lbs and 10,200. If this thing makes it on.the 1 bar setup ill b plenty happy. If not then it doesn't. I'm looking to see if someone else has done it without the kit. That's all
__________________
97 tj 4" lift 33x13.50 toyo mt's
91 xj 5" lift 33x10.5 swamper tsl's
tj v. xj is offline   Quote Quick Reply
Old 05-09-2012, 06:55 PM   #12
Jeeper
 
Sherpa's Avatar
 
Join Date: Oct 2010
Location: Lehi, UT
Posts: 1,049
Quote:
Originally Posted by tj v. xj View Post
I'm looking to see if someone else has done it without the kit. That's all
I am a big fan of turbocharging. Furthermore, I am also a big fan of doing it your own way rather than using a generic kit. I would love to see everybody have success at building a turbo system on their car... but I also know of the destruction that can happen when you get into boost and go too lean. I try to encourage people to avoid catastrophe, because when things don't go horrifically wrong, they tend to enjoy the experience a lot more.

Full disclosure: I managed to take an '89 Dodge Caravan which ran low 18s stock at Salt Lake's drag strip, and then via the magic of turbocharging I made it run 13.5x ETs... and this while still using the factory block, crankshaft, rods and pistons. 24 psi of boost is a lot of fun, but it'll also ruin your day in a split second if everything (fuel, spark, charge temps, etc) isn't just right.

Even after those years of experience, I don't pretend to know everything about turbocharging. Still, I try to help others in their quest for safe, reliable power.
__________________
Dempsey Bowling
My fleet: 91 Miata, 98 Wrangler Sport, 06 Mustang GT, 01 Suburban 8.1L, 14 Forte EX
Jeep mods: 4" longarm + 1" BL, 35" KM2s, 4.56s with dual ARBs... and lots of scratched armor
Sherpa is offline   Quote Quick Reply
Old 05-09-2012, 09:39 PM   #13
Jeeper
 
colorubi's Avatar
 
Join Date: Jun 2011
Location: Longmont CO
Posts: 170
The trouble you'll have with this philosophy is that the stock ECU MAY be able to compensate with a little more fuel trim-but ONLY in closed loop 14.7:1 stoichiometric running. The Jeep ECU is very aggressive holding closed loop and will do so aggressively into boost range MAP ranges. You know by running a supercharger that you will need to target 11.5-12.0 in boost ranges with gasoline. The stock ECU will not put that rich a fuel mixture with your extra boost. You will need to upsize the injectors, and likely run a programmable MAP sensor to range your voltage signal over 30"vac to your max boost. (Check out SplitSecond PSC-1-002) You may also find you need a "Fuel Enricher" like the one SplitSecond sells. This gem will override the closed loop and allow you to feed more fuel in boost ranges, while telling the ECU that everything is running fine at stoichiometric 14.7. It works by intercepting the O2 sensors and telling the ECU to send more fuel.

Ya know..........that blown and injected Hemi just might look preeety nice between a pair of Jeep fenders!

colorubi is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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 Off
Pingbacks are Off
Refbacks are Off




» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 03:40 AM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC