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Jeep 2.5 may go fast!

Posted: June 20th, 2013, 10:23 pm
by TurboTom
Starting a little project :doh:
Going in my Drag Spirit. Boosted of course

Alright...lets get crazy.


Left head 50 lbs, right head 20 lbs

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One row of bolts line up (but have to be shifted to center combustion chambers) and yes the pushrods all go up and down!
Since the head has symmetrical ports, a custom camshaft will be needed. I will probably run a dry sump system so I will not need the dist. gear cut on the cam. Ignition will be coil on plug with a 60-2 wheel for injection and timing control.

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Just a little eye candy

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Re: Jeep 2.5 may go fast!

Posted: June 21st, 2013, 6:53 am
by Cheromaniac
Cool stuff. That's definitely a Jeep 2.5 block but from which engine did the head come from?

Re: Jeep 2.5 may go fast!

Posted: June 21st, 2013, 8:51 am
by TurboTom
LS-1 Chevy

Re: Jeep 2.5 may go fast!

Posted: June 21st, 2013, 12:00 pm
by CobraMarty
Bore centers are the same on the LS-1 head?

Re: Jeep 2.5 may go fast!

Posted: June 21st, 2013, 12:37 pm
by TurboTom
Close enough... :mrgreen:

The cam will be the hard part

Re: Jeep 2.5 may go fast!

Posted: June 21st, 2013, 11:49 pm
by mountaineerjeff
whoa, hold the phone.....why cant I make a I6 out of 2 of these like they did back in the day, and then have a high flowing, cross flow, lightweight I6 option?

Re: Jeep 2.5 may go fast!

Posted: June 22nd, 2013, 8:50 am
by SilverXJ
I know LS heads have been welded together to create a LS V12 engine. http://ls1tech.com/forums/conversions-h ... build.html

How well do the coolant ports line up and where would the t-stat and housing go?

Re: Jeep 2.5 may go fast!

Posted: June 22nd, 2013, 12:25 pm
by TurboTom
Most of the bottom of the head will be welded up and new passages cut.
I will just weld in a T-stat outlet somewhere in the front.
It is an aluminum head......"Cuts Like Butta"

Thanks for the link on the V-12, that is cool

Yes Jeff you could make that happen. I am starting with the 4 to work out all the valve train and fitment issues.

Re: Jeep 2.5 may go fast!

Posted: June 24th, 2013, 7:03 am
by FlyinRyan
I'm tuning a turbo 2.5 using the JTEC PCM right now....runs great.

Re: Jeep 2.5 may go fast!

Posted: June 26th, 2013, 6:54 pm
by TurboTom
What kind of numbers are you seeing?
I will be running the Holley Dominator system on mine.

Re: Jeep 2.5 may go fast!

Posted: July 3rd, 2013, 3:42 pm
by amcinstaller
sorry I haven't been on in a while, what happened to the cheb motor you had in the spirit?

Re: Jeep 2.5 may go fast!

Posted: July 4th, 2013, 9:07 pm
by TurboTom
Got rid of the chevy engine. Going to build the worlds fastest 2.5 Jeep engine :mrgreen:

Just want to do something different with AMC power

Re: Jeep 2.5 may go fast!

Posted: July 5th, 2013, 5:18 am
by CobraMarty
TurboTom wrote:Going to build the worlds fastest 2.5 Jeep engine
:rockout: :banana: :cheers:

Re: Jeep 2.5 may go fast!

Posted: July 5th, 2013, 7:45 pm
by TurboTom
Had to get a starting weight

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Re: Jeep 2.5 may go fast!

Posted: August 18th, 2013, 9:33 pm
by mountaineerjeff
any progress. Im starting a revamp on my build, and one major focus is weight. My main idea is to go I6, and possibly a Al head, but then I keep thinking about doing a turbo 2.5. one thing that would really sweeten the pot for doing a 2.5 would be if I could raise the rev limit substantially, and if I could convince you to send one of those heads my one after you do all the heavy leg work :)