Notices
Modified JK Tech Tech related bulletin board forum regarding subjects such as suspension, tires & wheels, steering, bumpers, skid plates, drive train, cages, on-board air and other useful modifications that will help improve the performance and protection of your Jeep JK Wrangler (Rubicon, Sahara, Unlimited and X) on the trail.

PLEASE DO NOT START SHOW & TELL TYPE THREADS IN THIS FORUM

3.8L Engine Build

Thread Tools
 
Old Jan 31, 2011 | 05:53 AM
  #11  
ronjenx's Avatar
JK Jedi Master
15 Year Member
 
Joined: Feb 2008
Posts: 12,907
Likes: 185
From: Maine
Default

Originally Posted by JPop
That's really about it that isn't going to be too intrusive as far as the engine internals go. 0.025" is about as far as I would go, and I understand that at 0.040" you would really be at the fringe of asking for trouble.
0.008" MAX is a combined total dimension of the stock removal limit from cylinder head and block top surface (Deck) together.

I suspect it's because it's an interference engine.
Reply
Old Jan 31, 2011 | 08:38 AM
  #12  
Smopho's Avatar
JK Enthusiast
 
Joined: Apr 2009
Posts: 264
Likes: 1
From: Austin, TX
Default

Originally Posted by Jeep Hound
So you guys are saying there I'd nothing that can be done to improve reliability and performance.. An I don't mean exaust and CAI I mean real mechanical gains
Put in some forged rods and pistons, a lower compression cam, and stick a turbo and intercooler on it.
Reply
Old Jan 31, 2011 | 01:30 PM
  #13  
Jeep Hound's Avatar
Thread Starter
JK Freak
 
Joined: Apr 2009
Posts: 901
Likes: 0
From: Grande Prairie, Alberta
Default

Originally Posted by mvbeggs
Why not supercharge?
Because the engine falls appart stock.. It won't last long with a supercharger
Reply
Old Jan 31, 2011 | 01:41 PM
  #14  
Jeep Hound's Avatar
Thread Starter
JK Freak
 
Joined: Apr 2009
Posts: 901
Likes: 0
From: Grande Prairie, Alberta
Default

For people what have had their engine blow:

How many miles/KM did it blow at?

Did you stomp on the throttle while the engine was cold on a daily basis?

My buddy's jeep just started loosing oil, looses 3L about every 4000km.. There are no leaks and the plugs are clean it's not burning... It's messes up..??

It has to be burning but the plugs are clean I'm scratching my head.
Reply
Old Jan 31, 2011 | 01:45 PM
  #15  
Dronac's Avatar
JK Freak
 
Joined: Jan 2010
Posts: 726
Likes: 0
From: Charlotte, NC
Default

My engine was replaced at 30k miles. It was still running, but according to the tech it was on the verge of spinning a bearing. No oil loss. No power loss. Perfectly maintained and not abused. It went offroad maybe twice before it was replaced.
Reply
Old Jan 31, 2011 | 02:12 PM
  #16  
ronjenx's Avatar
JK Jedi Master
15 Year Member
 
Joined: Feb 2008
Posts: 12,907
Likes: 185
From: Maine
Default

Originally Posted by Jeep Hound
Because the engine falls appart stock.. It won't last long with a supercharger
Has anyone heard of a JK 3.8 blowing up because of having a RIPP supercharger on it?
Reply
Old Jan 31, 2011 | 02:15 PM
  #17  
Jeep Hound's Avatar
Thread Starter
JK Freak
 
Joined: Apr 2009
Posts: 901
Likes: 0
From: Grande Prairie, Alberta
Default

Originally Posted by Dronac
My engine was replaced at 30k miles. It was still running, but according to the tech it was on the verge of spinning a bearing. No oil loss. No power loss. Perfectly maintained and not abused. It went offroad maybe twice before it was replaced.
Wow... That's the worst one I have heard of to date ... Was it making noise?
Reply
Old Jan 31, 2011 | 03:11 PM
  #18  
Mark's Avatar
JK Enthusiast
 
Joined: Mar 2010
Posts: 363
Likes: 0
From: st. louis, MO
Default Rods and Pistons

badasscars.com/index.cfm/page/ptype=product/product_id=109/mode=prod/prd109.htm

Just a good read about rods and pistons. IF supercharging in i your future, i'd focus on the last paragraph.

Last edited by Robar; Jan 31, 2011 at 03:42 PM. Reason: Edited direct link
Reply
Old Jan 31, 2011 | 03:18 PM
  #19  
LynDi's Avatar
JK Enthusiast
 
Joined: Nov 2006
Posts: 147
Likes: 0
From: Pueblo West, Colorado
Default Hope

I just hope my little motor last a little longer, then dies a sudden death. I want a V8 sooooooooo bad.
Reply
Old Jan 31, 2011 | 05:02 PM
  #20  
BlackRockBurner's Avatar
JK Super Freak
Veteran: Air Force
 
Joined: Nov 2010
Posts: 1,186
Likes: 2
From: Vallejo, CA
Default

88k and it blew up. Just 3.5 years old. In fact, it's been in the shop since New Years day, and it's still there! Now there is a 3 week wait for a new shaft. Is this American quality control? I love the Jeep, but this power plant has to be replaced. No, I don't race it, I usually cruise at 70: thats after it warms up and let the oil flow. I bought the Jeep knowing I would not go fast.
Reply



All times are GMT -8. The time now is 01:13 PM.