Pentastar Heads on a 3.8 block? - Jeep Wrangler Forum
Jeep Wrangler Forum

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

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on
Old 03-23-2012, 04:04 PM   #1
Join Date: Mar 2012
Posts: 5
Pentastar Heads on a 3.8 block?

I have been searching for into on how different these motors are. Anyone know if the block is completely different? Any idea on this build?

jaimeson55 is offline   Quote Quick Reply
Old 03-23-2012, 04:43 PM   #2
TOKKIE's Avatar
Join Date: Mar 2010
Location: Sonora, CA.
Posts: 414
Do a little more research on the pentastar, the cams have phasers. You will have no way to control cam timing.

TOKKIE is offline   Quote Quick Reply
Old 03-23-2012, 05:00 PM   #3
Join Date: Mar 2012
Posts: 5
Good point, Chrysler is so slow to upgrade power plants. They wonder why everyone is always doing motor swaps. I guess it's just a supercharger or a swap from here. 3.8 sucks
jaimeson55 is offline   Quote Quick Reply
Old 04-02-2012, 05:19 AM   #4
Join Date: Apr 2012
Posts: 2
i've just bought a JK here in Oz,The car itself is awesome but totally under powered. I'm asking the same questian as you jaimeson55 regarding the differences in these two powerplants. our compresion is low @ 9.6:1 to start off with so i was thinking a Turbo,but which one, or a Vortech charger V3. I just don't know if i want to do that to the motor just yet
Dracki is offline   Quote Quick Reply
Old 04-03-2012, 01:13 AM   #5
Join Date: Mar 2012
Posts: 5
I just ordered the RIPP vortech kit. I plan on tuning it for E85 and then stepping up to 60lb injectors and a 12psi pulley. I think that will about do it. I will let you know how the stock kit is. We need to get some good videos on youtube of the kit, everything up there is boring.
jaimeson55 is offline   Quote Quick Reply
Old 04-04-2012, 09:33 AM   #6
Join Date: Apr 2012
Posts: 2
Ripp has a few vids on you tube,the one that impressed me was the guy in the desert doing doughnuts around his mate.

just before you go & further modify the charger after the stock install,go check with a good motor builder cause i'm sure your going to need different valves & springs & decompress the engine alittle,that doesn't cost much in parts but the labour may hurt. 12 psi may take it up to around 17:1 comp ratio which means you could blow your heads & cost lots of dollars. I know with Turbo's,you cant leave the motor stock & double the comp ratio without head work & exhaust,just keep that in mind.
Maybe we can do a group buy cause i'm thinking of buying one.get it cheaper

Dracki is offline   Quote Quick Reply

Quick Reply

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:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:


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

Similar Threads
Thread Thread Starter Forum Replies Last Post
ATV Plow on a Wrangler??? chainlake YJ Tech Forum 11 01-02-2013 07:53 PM
KY: Mickey Thompson 35x12.5 Baja MTZ mounted on Classic Lock Wheel azzkikr Classifieds Archive 6 03-26-2012 08:17 AM
need help deciding on some decals... corigirlloves Pictures Forum 3 03-24-2012 03:53 PM
Chipped 258 block doing rear main seal JML III YJ Tech Forum 2 03-23-2012 11:41 PM
New kid on the block they call me nasty Oklahoma Jeep Forum 0 03-23-2012 02:47 PM

Download our Mobile App

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 04:16 AM.

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