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Jeep 2.5 may go fast!

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TurboTom
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Jeep 2.5 may go fast!

Post by TurboTom » June 20th, 2013, 10:23 pm

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

Image

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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1979 AMC Spirit
Building a Turbo 2.5
I am not very smart!

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Cheromaniac
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Re: Jeep 2.5 may go fast!

Post by Cheromaniac » June 21st, 2013, 6:53 am

Cool stuff. That's definitely a Jeep 2.5 block but from which engine did the head come from?
1992 XJ 4.6 Stroker - 5MT - 202rwhp/258rwtq - Sold 13/12/2016 :cry:
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- 310rwhp/328rwtq - Midlife crisis car :D
A few bolt-ons

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TurboTom
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Re: Jeep 2.5 may go fast!

Post by TurboTom » June 21st, 2013, 8:51 am

LS-1 Chevy
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1979 AMC Spirit
Building a Turbo 2.5
I am not very smart!

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Re: Jeep 2.5 may go fast!

Post by CobraMarty » June 21st, 2013, 12:00 pm

Bore centers are the same on the LS-1 head?
1998 XJ 2D AW4 32"MTR 3.55 4.5"RC JCR Slider Magnaflow 150rwHP/174rwTQ=> Sprintex SC Gibson Header 6lb 120-140*IAT 211rwHP/274rwTQ WasherFluid Inj 70mmTB 7.5lb 100-120*IAT=>Now 12 pounds Boost=> +BV ported head
99 XJ M62 S/C

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TurboTom
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Re: Jeep 2.5 may go fast!

Post by TurboTom » June 21st, 2013, 12:37 pm

Close enough... :mrgreen:

The cam will be the hard part
Remember, Sometimes I post after drinking!
1979 AMC Spirit
Building a Turbo 2.5
I am not very smart!

mountaineerjeff
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Re: Jeep 2.5 may go fast!

Post by mountaineerjeff » June 21st, 2013, 11:49 pm

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?
build thread http://www.cherokeeforum.com/f46/offici ... ep-179516/

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SilverXJ
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Re: Jeep 2.5 may go fast!

Post by SilverXJ » June 22nd, 2013, 8:50 am

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?

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Re: Jeep 2.5 may go fast!

Post by TurboTom » June 22nd, 2013, 12:25 pm

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.
Remember, Sometimes I post after drinking!
1979 AMC Spirit
Building a Turbo 2.5
I am not very smart!

FlyinRyan
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Re: Jeep 2.5 may go fast!

Post by FlyinRyan » June 24th, 2013, 7:03 am

I'm tuning a turbo 2.5 using the JTEC PCM right now....runs great.
Flyin' Ryan Performance

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TurboTom
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Re: Jeep 2.5 may go fast!

Post by TurboTom » June 26th, 2013, 6:54 pm

What kind of numbers are you seeing?
I will be running the Holley Dominator system on mine.
Remember, Sometimes I post after drinking!
1979 AMC Spirit
Building a Turbo 2.5
I am not very smart!

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amcinstaller
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Re: Jeep 2.5 may go fast!

Post by amcinstaller » July 3rd, 2013, 3:42 pm

sorry I haven't been on in a while, what happened to the cheb motor you had in the spirit?
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TurboTom
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Re: Jeep 2.5 may go fast!

Post by TurboTom » July 4th, 2013, 9:07 pm

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
Remember, Sometimes I post after drinking!
1979 AMC Spirit
Building a Turbo 2.5
I am not very smart!

CobraMarty
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Re: Jeep 2.5 may go fast!

Post by CobraMarty » July 5th, 2013, 5:18 am

TurboTom wrote:Going to build the worlds fastest 2.5 Jeep engine
:rockout: :banana: :cheers:
1998 XJ 2D AW4 32"MTR 3.55 4.5"RC JCR Slider Magnaflow 150rwHP/174rwTQ=> Sprintex SC Gibson Header 6lb 120-140*IAT 211rwHP/274rwTQ WasherFluid Inj 70mmTB 7.5lb 100-120*IAT=>Now 12 pounds Boost=> +BV ported head
99 XJ M62 S/C

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TurboTom
I made it to triple digits!
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Re: Jeep 2.5 may go fast!

Post by TurboTom » July 5th, 2013, 7:45 pm

Had to get a starting weight

Image

Image
Remember, Sometimes I post after drinking!
1979 AMC Spirit
Building a Turbo 2.5
I am not very smart!

mountaineerjeff
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Re: Jeep 2.5 may go fast!

Post by mountaineerjeff » August 18th, 2013, 9:33 pm

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 :)
build thread http://www.cherokeeforum.com/f46/offici ... ep-179516/

N/A 14.9@89
N2O 12.7@104

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