post #1 of Old 02-15-2010, 11:36 PM Thread Starter
Stefan
Registered User
1997 TJ Wrangler 
 
Join Date: Feb 2010
Location: 32504
Posts: 81
Performance Speed mods??

I have an airaid intake, throttle body spacer, borla headers, borla cat back exhaust.... I've already stroked the engine and all that jazz...but I'm wondering if there are any other performance mods that don't cost too much (since I've already dropped 10k+ on this TJ over the years in addition to what my dad did with it)


-Stefan Snorrason (1997 TJ a.k.a Eloisa or Jeppi)
Stefan is offline  
post #2 of Old 02-15-2010, 11:50 PM
Max-Q
Registered User
1997 TJ Wrangler 
 
Join Date: Aug 2009
Location: St. Louis
Posts: 809
How about an LSx engine? Why are you worried about making your Jeep faster?

1997 Jeep TJ
1983 Jeep CJ7
2011 JK Unlimited Rubicon
Max-Q is offline  
post #3 of Old 02-15-2010, 11:55 PM Thread Starter
Stefan
Registered User
1997 TJ Wrangler 
 
Join Date: Feb 2010
Location: 32504
Posts: 81
Oh sorry, I covered my reasons for speed in another post.. I own a 1970 Baracuda dragster with a 504 ci big block in it...right now the Cuda and Wrangler are my babies, but I want to be able to race the TJ more often i bumped the TJ up to 4.9 litres which is intensely quick. Mainly...I'm a gearhead and I like workin on things to make em faster/more efficient. The jeep is so much fun to work on and even though i have the cuda and a BMW...the Jeep is my daily driver

-Stefan Snorrason (1997 TJ a.k.a Eloisa or Jeppi)
Stefan is offline  
post #4 of Old 02-15-2010, 11:57 PM Thread Starter
Stefan
Registered User
1997 TJ Wrangler 
 
Join Date: Feb 2010
Location: 32504
Posts: 81
I'm trying to keep the same Engine in my TJ
I've got 3 other TJ engines...all with zero miles on them....they're just extras (the I6 TJ engine is such a versatile machine...strong and incredibly reliable)

-Stefan Snorrason (1997 TJ a.k.a Eloisa or Jeppi)
Stefan is offline  
post #5 of Old 02-15-2010, 11:58 PM
Jerry Bransford
Administrator
 
Jerry Bransford's Avatar
2004 TJ Wrangler 
 
Join Date: Jan 2003
Location: Escondido, California
Posts: 64,003
To me, building a Wrangler TJ to race is like building a Corvette to go rock crawling and hardcore offroading. Neither makes any sense to me.

Getting Savvy...

When you have a choice, buy American.
Jerry Bransford is online now  
post #6 of Old 02-16-2010, 12:09 AM Thread Starter
Stefan
Registered User
1997 TJ Wrangler 
 
Join Date: Feb 2010
Location: 32504
Posts: 81
I entirely understand that, I just come from a Rally background and I use my TJ occasionally for trail challenges for money...I like to have a high top speed in the open sections and the most power possible...I don't really intend to drag race my TJ...i have the cuda for the track, but i'd like to have some extra goodies to pop under the hood to work on to keep me busy and set my tj apart from all those other ones out there.

-Stefan Snorrason (1997 TJ a.k.a Eloisa or Jeppi)
Stefan is offline  
post #7 of Old 02-16-2010, 12:11 AM Thread Starter
Stefan
Registered User
1997 TJ Wrangler 
 
Join Date: Feb 2010
Location: 32504
Posts: 81
Hey jerry, have you considered side mounting your Gerry can? I've seen it done on a few TJ's and it looks rather nice...if i look for a minute i may be able to find the example of it on the forum.

-Stefan Snorrason (1997 TJ a.k.a Eloisa or Jeppi)
Stefan is offline  
post #8 of Old 02-16-2010, 12:16 AM
Jerry Bransford
Administrator
 
Jerry Bransford's Avatar
2004 TJ Wrangler 
 
Join Date: Jan 2003
Location: Escondido, California
Posts: 64,003
Quote:
Originally Posted by Stefan View Post
Hey jerry, have you considered side mounting your Gerry can?
No, the rocks would puncture it or rip it right off. I don't even carry it when the trail is like this one (Sunbonnet in Johnson Valley).

By the way, those fender flares got mostly ripped off that day & they are now completely gone.
Attached Thumbnails
CIMG2621.JPG  

Getting Savvy...

When you have a choice, buy American.
Jerry Bransford is online now  
post #9 of Old 02-16-2010, 12:16 AM
Bane7962
Registered User
1998 XJ Cherokee 
 
Join Date: Feb 2009
Location: Belcamp
Posts: 840
Quote:
Originally Posted by Jerry Bransford View Post
To me, building a Wrangler TJ to race is like building a Corvette to go rock crawling and hardcore offroading. Neither makes any sense to me.




Sad thing too, Stingrays are gorgeous...
Bane7962 is offline  
post #10 of Old 02-16-2010, 07:01 AM
Wheelin98TJ
JEEP FREAK
 
Wheelin98TJ's Avatar
1998 TJ Wrangler 
 
Join Date: Apr 2004
Posts: 25,876
Starting with a different motor is usually the best option if you desire more power.

If you already stroked the I6 and you want to keep it, you'll probably want to look at forced induction next.

Nothing will be cheap, that is for sure.
Wheelin98TJ is offline  
post #11 of Old 02-16-2010, 07:07 AM
Unlimited04
This post/info=my opinion
 
Unlimited04's Avatar
2004 LJ Wrangler 
 
Join Date: Dec 2005
Location: Colorado
Posts: 24,137
Quote:
Originally Posted by Stefan View Post
I have an airaid intake, throttle body spacer, borla headers, borla cat back exhaust.... I've already stroked the engine and all that jazz...but I'm wondering if there are any other performance mods that don't cost too much (since I've already dropped 10k+ on this TJ over the years in addition to what my dad did with it)
you've discovered what most around here already knew. The 4.0L isn't made for speed and dropping $10k in exhaust, throttle body spacers and intakes is a complete waste of money.

#1 best use of money = regear.
#2 best use of money = V8 swap.

should have read this:
http://www.jeepforum.com/forum/f9/fa...intake-558437/
Unlimited04 is offline  
post #12 of Old 02-16-2010, 08:06 AM
DanZ51
Senior Member
 
DanZ51's Avatar
2004 TJ Wrangler 
 
Join Date: Feb 2009
Location: Wallingford, VT
Posts: 842
Cam and headwork. Unlike most on this board, I believe there is some effeciency to be gained in the I6. Even at the more modest RPM band.

But unless I trip over another engine growing behind my shed, I'm not going to start tearing another engine apart.

"I will always be an American Soldier"
DanZ51 is offline  
post #13 of Old 02-16-2010, 08:31 AM
Wheelin98TJ
JEEP FREAK
 
Wheelin98TJ's Avatar
1998 TJ Wrangler 
 
Join Date: Apr 2004
Posts: 25,876
Quote:
Originally Posted by DanZ51 View Post
Cam and headwork. Unlike most on this board, I believe there is some effeciency to be gained in the I6. Even at the more modest RPM band.

But unless I trip over another engine growing behind my shed, I'm not going to start tearing another engine apart.
Do you know what cam works well?
Wheelin98TJ is offline  
post #14 of Old 02-16-2010, 08:48 AM
lumpster
Web Wheeler
 
lumpster's Avatar
2012 JK Wrangler 
 
Join Date: Jul 2008
Location: kansas City MO
Posts: 4,731
Quote:
Originally Posted by Max-Q View Post
Why are you worried about making your Jeep faster?



This is really a silly question, everyone on this forum modifies their jeep, its only logical that it would carry over into the more power mods. Did the OP say he wanted to go faster or wanted more power? You can actually use more power on the trails too, not just to do top speed runs down the interstate.



To the OP, the 4.0 is a great motor for leaving it stock and putting around, it is not a good candidate for hop up parts unless you just want it to look cool when you pop the hood. Your money would be better "seat of the pants felt" to be spent on making your jeep lighter. Since an increase in weight will make your jeep accelerate slower and the 4.0 is a waste of money, sink it into all the aluminum parts you can.
lumpster is offline  
post #15 of Old 02-16-2010, 08:53 AM
DanZ51
Senior Member
 
DanZ51's Avatar
2004 TJ Wrangler 
 
Join Date: Feb 2009
Location: Wallingford, VT
Posts: 842
No I don't have any experience modifying the Jeep I6 (alot of V8s, some Light & Heavy Diesels, a few turbo 4s).

You need to look at your application.. RPM range, Budget (and rule) limitations. Plus anything much beyond a stock cam will require a reprogramed ECM.

http://www.angelfire.com/my/fan/Jeep4.0Camshafts.htm

"I will always be an American Soldier"
DanZ51 is offline  
Reply

Tags
fast tj , performance , speed


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
4.0 Performance Mods JeepSahara2001 TJ Wrangler Technical Forum 27 05-20-2010 05:31 PM
Performance mods 93hulk TJ Wrangler Technical Forum 7 05-26-2008 12:39 PM
Any performance mods out yet? JKMudder JK Wrangler Technical Forum 6 11-01-2007 07:42 PM
98 Tj 4.0 w/automatic Best performance mods rhot TJ Wrangler Technical Forum 9 05-01-2007 02:06 PM
Performance Mods? loudog3114 TJ Wrangler Technical Forum 30 10-20-2004 12:29 PM

Posting Rules  
You may not post new threads
You may not 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 On
Refbacks are On

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