2.9 stroker kit build-up - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Build Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 07-23-2012, 08:45 AM   #1
Jeeper
 
VinceTj's Avatar
 
Join Date: Jan 2012
Posts: 192
2.9 stroker kit build-up

Finally after considering a 4.0 swap and talking to a guy who have done the swap, id rather take a spare 2.5 and build it on the side

My weapon of choice, the 505 performance stroker (torque monster) kit which include :


4340 I beam rods, Ross custom piston 8.75 to 10.75. Select bore 20. 30. 40. .60 .80 .100
Performance brackets, oil pump, injectors 24lb stage I, II, III race cam


I wish to go 9.5 compression for .30 over, the kit is 1699$ so.... im starting to save money (pay raise at work)


Instead of porting and planning the head of the engine and spend a tons of money.... they have one already build for 575$

stats for the pro-rock head

fully ported cylinder head 2.00 intake and 1.570 exhaust valves Chrome molly spring retainer keepers .580 max lift hydraulic and solid cams compatible. Raised exhaust runners and profiled intake runners flowing over 300 at .500 lift on intake side and 180 plus exhaust


That build up thread will be slow as i have a family to take care of but im going in 2 weeks to pick up my spare 2.5 for 150$ and its a runner!!!
before that engine is going in my Yj i will do an ax15 swap with a SYE

let me know what you guys (and gals) are thinking

__________________
Frenchy!
VinceTj is offline   Quote Quick Reply
Old 07-23-2012, 08:55 AM   #2
Jeeper
 
VinceTj's Avatar
 
Join Date: Jan 2012
Posts: 192
oh and i almost forget, depending of the clearance i might deck the block a tiny bit to help me raise the compression ration

__________________
Frenchy!
VinceTj is offline   Quote Quick Reply
Old 07-23-2012, 09:58 AM   #3
Jeeper

WF Supporting Member
 
denisbaldwin's Avatar
 
Join Date: Nov 2011
Location: Clearwater, FL
Posts: 3,300
Subbed. Interested to see how much power you get out of that 2.5 and how reliable it is once stroked. I'm pretty committed to doing a V8 install in mine but this is worth watching regardless.
__________________
Denis A. Baldwin
Clearwater, FL
1991 YJ 99 Vortec 5.7L, SM465, NP205, 14 Bolt Rear, Dana 60 Front, 5.13 Gears, Detroit Lockers, 395/85R20 46" Michelin XML tires on 20" XD Wheels, Cherokee Offset Springs (10" front to back stretch total), Bilstein 5150s, 1in. BL, custom cage, Warn M8000, Double D Dash/OHC, 4Low Front Stinger Bumper, DirtWorx Rear Bumper WTC, Tube Fenders, Comp Cut, 1 Ton HD Kingpin High Steering and PAID FOR.
denisbaldwin is offline   Quote Quick Reply
Old 07-23-2012, 04:22 PM   #4
Jeeper
 
VinceTj's Avatar
 
Join Date: Jan 2012
Posts: 192
called 505 performance, they re saying that the kit without the race head is pushing 140 lb ft to the ground @ 3500 rpm.... not bad at all
__________________
Frenchy!
VinceTj is offline   Quote Quick Reply
Old 07-23-2012, 07:05 PM   #5
Jeeper
 
busemans's Avatar
 
Join Date: Dec 2010
Location: on the gulf of mexico
Posts: 1,352
i will keep on the thread too. i like to hear when people try new things and doing some work to the good ol 2.5 sounds cool
__________________
A lot of teenagers are people who express a burning desire to be different be dressing exactly alike.
Panties aren't my favorite, but they're right next to it...
No one is normal, there are just a lot of weird people with things in common.
busemans is offline   Quote Quick Reply
Old 07-23-2012, 07:09 PM   #6
Jeeper
 
Irongrave's Avatar
 
Join Date: Apr 2011
Location: Erie, PA
Posts: 2,800
Send a message via AIM to Irongrave
could be a nice little motor. with the right gears in the axles and 4:1 t-case should crawl great.

I'm keeping my 2.5 stock for now but might build a 4 banger for a buggy down the road.
__________________
4421
Irongrave is offline   Quote Quick Reply
Old 07-23-2012, 07:18 PM   #7
Jeeper
 
Xpress's Avatar
 
Join Date: Jan 2011
Location: El Cajon
Posts: 2,585
140ft lb at the back wheels is a pretty significant leap over stock, which is probably somewhere around 95ft lb.. Wonder if the AX5 will handle it?
__________________


2.5L Genius of some sort.
Xpress is offline   Quote Quick Reply
Old 07-23-2012, 07:56 PM   #8
Jeeper
 
VinceTj's Avatar
 
Join Date: Jan 2012
Posts: 192
Quote:
Originally Posted by Xpress View Post
140ft lb at the back wheels is a pretty significant leap over stock, which is probably somewhere around 95ft lb.. Wonder if the AX5 will handle it?
i dont think so, thats why ill rebuild a ax15 as well before putting it in
__________________
Frenchy!
VinceTj is offline   Quote Quick Reply
Old 07-23-2012, 08:20 PM   #9
Jeeper

WF Supporting Member
 
O_M_Jeep's Avatar
 
Join Date: Aug 2011
Location: South Central Wyoming
Posts: 1,166
the transmission doesnt have to be an AX-15, the back of the 2.5L Jeep engine is the "GM corporate pattern" or sometimes called the "GM Metric pattern", also called the "GM 60 degree pattern" and there is a ton of bell housings that will bolt to the 2.5L.

96-00 Dakota 2.5L bellhousing, Connects all to any Jeep 2.5L L4. Because of it's GM 60 degree V6 inherited bolt pattern, also works with any Buick FWD V6 and supercharged V6, any Chevrolet 2.8/3.1/3.4 V6, any Cadillac 4.1/4.5/4.9 V8 and with a minor modification, any Olds Aurora DOHC V8 and Cadillac DOHC Northstar V8. Also bolts to any Isuzu 3.2\3.5 DOHC V6.

So that is a wide range of 4x4 transmissions to choose from, also a wide range of engines that will swap in where your 2.5 is, the mounts and ECMs are of course the hard part, and the electronics package has to be done from scratch if you go to an AW4 but Stew Wilson has done this and he has a lot of good info on his site about that exact swap.

You can also go to an AW4 transmission using a Isuzu Rodeo 3.2/3.5 bellhousing which has the GM 60 degree pattern and will bolt to your 2.5. Other 60 degree engine options are a supercharged 3800, Aurora V8, or Northstar and LS4.

The upshot is this, you can upgrade to a far better transmission of your choice, build the 2.5 stroker, and if you decide you want to go a different route at some point you have a plethera of engines to choose from that have the same bolt pattern as your 2.5, no matter what you'll have to fabricate mounts, so have fun with it.

Right now I'm building for my 2.5l TJ this -

Fiero 2.8 (painted to match Jeep) - Isuzu bell housing - AW4 - Atlas II

So you can do almost anything with any type of engine, keep in mind a 9500 rpm wont help you so the ricer engines arent good, but for low end torque most of the Isuzu / GM 60 degree LS and V6 engines and Cummins 4BT diesels can be rebuilt for ultimate low rpm torque.

Let your imagination be your guide and your bank account be your anchor and have fun
O_M_Jeep is offline   Quote Quick Reply
Old 07-23-2012, 09:45 PM   #10
Jeeper
 
Join Date: Nov 2011
Posts: 717
couple considerations

What will that increase in torque be used for?

What will it buy you?

Is 3500 rpm a practical rpm for the application of that torque?

Is it a trail Jeep or a race Jeep?

Too many times people get focused on 1 or 2 aspects of a project and neglect an overall look at all aspects of it.

I believe the I6 4.0 is 200+ ftlbs at 1200 rpm and up. Very flat. Not as exciting or unique as a stroked 2.5, but....
ballistx is offline   Quote Quick Reply
Old 07-23-2012, 10:21 PM   #11
Jeeper
 
VinceTj's Avatar
 
Join Date: Jan 2012
Posts: 192
Quote:
Originally Posted by ballistx View Post
What will that increase in torque be used for?

What will it buy you?

A nice project that ll be way cheaper to put in than the 4.0 plus i kinda love the idea of a big 4 banger

Is 3500 rpm a practical rpm for the application of that torque?

In my case, Yes, the whole powerband gets up, more power to work with plus i would like to run 33s and still be able to be a DD without to much of an PITA to drive

Is it a trail Jeep or a race Jeep?

Mostly a daily driver Jeep, the head im not sure yet if i really want it.... im afraid ill need to rev it to the moon (which i dont want) to produce any kind of power

Too many times people get focused on 1 or 2 aspects of a project and neglect an overall look at all aspects of it.

Yeah but still learning men

I believe the I6 4.0 is 200+ ftlbs at 1200 rpm and up. Very flat. Not as exciting or unique as a stroked 2.5, but....
i love the idea too
__________________
Frenchy!
VinceTj is offline   Quote Quick Reply
Old 07-23-2012, 10:23 PM   #12
Jeeper
 
VinceTj's Avatar
 
Join Date: Jan 2012
Posts: 192
BTW after some digging the G54 transmission from toyota is almost the same thing as a AX5 (bolt-on swap).... back on the drawing board since that one have a really good reputation in the Toyota World...
__________________
Frenchy!
VinceTj is offline   Quote Quick Reply
Old 07-23-2012, 11:30 PM   #13
Jeeper
 
YJ325i's Avatar
 
Join Date: Mar 2012
Location: Denver
Posts: 406
I love hearing new projects like this. Cant wait to see how it turns out.
__________________
'95 YJ,2.5" SL,1" BL, BFG 33's, t-body, magnaflow exh. 4 banger
All I need is more money, more space, and more time.
YJ325i is offline   Quote Quick Reply
Old 07-24-2012, 12:24 AM   #14
Jeeper
 
DasfieldmarshelsYJ's Avatar
 
Join Date: Jan 2012
Location: Boston, MA
Posts: 539
Subbed can't wait to see the outcome
DasfieldmarshelsYJ is offline   Quote Quick Reply
Old 07-24-2012, 01:23 PM   #15
Jeeper
 
Xpress's Avatar
 
Join Date: Jan 2011
Location: El Cajon
Posts: 2,585
Quote:
Originally Posted by VinceTj View Post
BTW after some digging the G54 transmission from toyota is almost the same thing as a AX5 (bolt-on swap).... back on the drawing board since that one have a really good reputation in the Toyota World...
Wouldn't be surprised, Toyota primarily uses Aisin transmissions.
__________________


2.5L Genius of some sort.
Xpress is offline   Quote Quick Reply
Old 07-24-2012, 02:03 PM   #16
Jeeper
 
Hocke230's Avatar
 
Join Date: Mar 2012
Posts: 224
Sorry for being a moron but what would this entail?

I'd love to beef up my 2.5 when ever the rebuild comes around and if I'd be able to sniff 140rwhp I'd be estatic

New Transmission - yes
New Rods - yes
New Pistons - yes
New Injectors (Assuming use ford 24#) yes
New Cams - yes

Do you keep the same head? Same block?
Hocke230 is offline   Quote Quick Reply
Old 07-24-2012, 02:44 PM   #17
Jeeper
 
Irongrave's Avatar
 
Join Date: Apr 2011
Location: Erie, PA
Posts: 2,800
Send a message via AIM to Irongrave
hmm G54 bolt up to a 2.5...that means toyota t-case(s)
__________________
4421
Irongrave is offline   Quote Quick Reply
Old 07-24-2012, 04:39 PM   #18
Jeeper
 
VinceTj's Avatar
 
Join Date: Jan 2012
Posts: 192
Quote:
Originally Posted by Hocke230 View Post
Sorry for being a moron but what would this entail?

I'd love to beef up my 2.5 when ever the rebuild comes around and if I'd be able to sniff 140rwhp I'd be estatic

New Transmission - yes
New Rods - yes
New Pistons - yes
New Injectors (Assuming use ford 24#) yes
New Cams - yes

Do you keep the same head? Same block?
New transmission, either a G58 from toyota (an ax5 build with stronger component) or an Ax15 swap.
New rod, hell yeah some 4340 I beam rod same lenght
New pistons but .30 bigger, i dont wanna go too big might have cooling issues otherwise
they have some 24 lbs injectors coming with the kit so ill use them
i have the choice between 3 camshafts but i dunno which one ill go with, i dont wanna have to rev it to the moon to have power

Ill simply go with the race head that they re selling,for 575$ itw way cheaper than rebuilding, porting, polishin and buying stiffer spring (camshaft) new rocker(mileage) etc etc.

Same block : Yes but cleaned and bored .30 over

im interested to put Timing gear instead of a chain (had that on my drag car loved the sound of it) but i cant find a kit for the 2.5....
__________________
Frenchy!
VinceTj is offline   Quote Quick Reply
Old 07-25-2012, 06:05 PM   #19
Jeeper
 
VinceTj's Avatar
 
Join Date: Jan 2012
Posts: 192
2 weeks before spare block cant wait!!!!
__________________
Frenchy!
VinceTj is offline   Quote Quick Reply
Old 07-25-2012, 08:07 PM   #20
Supporting Member

WF Supporting Member
 
Gunner's Avatar
 
Join Date: Jun 2012
Location: Seal Beach
Posts: 7,279
That race head is moving a lot of air at .500 lift And it has over 2 inch intake and 1.6 exhaust. I would be careful about loosing port velocity and thereby low end torque with a race head. If your not turning the rpm to support the head the motor will be lazy down low.
Gunner is offline   Quote Quick Reply
Old 07-26-2012, 08:13 AM   #21
Jeeper
 
VinceTj's Avatar
 
Join Date: Jan 2012
Posts: 192
Depending of which cam you use 505 performance were saying that if i use the proper camshaft itll help me having more torque than the stock head depending where the cam is suppose to be.... but i have to be honest im doing a lot of research right now for that reason, i dont wanna loose all of the low end torque but having a crazy amount in the upper RPM
__________________
Frenchy!
VinceTj is offline   Quote Quick Reply
Old 07-26-2012, 08:14 AM   #22
Jeeper
 
VinceTj's Avatar
 
Join Date: Jan 2012
Posts: 192
Quote:
Originally Posted by Irongrave View Post
could be a nice little motor. with the right gears in the axles and 4:1 t-case should crawl great.

I'm keeping my 2.5 stock for now but might build a 4 banger for a buggy down the road.

Eventually i want 4:56 with 33in tires
__________________
Frenchy!
VinceTj is offline   Quote Quick Reply
Old 07-26-2012, 12:04 PM   #23
Jeeper

WF Supporting Member
 
O_M_Jeep's Avatar
 
Join Date: Aug 2011
Location: South Central Wyoming
Posts: 1,166
If your going to the AX-15, think about 4.88s, I have the 2.5 / AX5 and 4.88s on 33"s and I have to watch my sped, it will creep up to 70 or 75 without any effort.
O_M_Jeep is offline   Quote Quick Reply
Old 07-26-2012, 08:38 PM   #24
Jeeper
 
VinceTj's Avatar
 
Join Date: Jan 2012
Posts: 192
4.88 i think its too high for what im planning to do with it
__________________
Frenchy!
VinceTj is offline   Quote Quick Reply
Old 07-30-2012, 07:00 AM   #25
Jeeper
 
VinceTj's Avatar
 
Join Date: Jan 2012
Posts: 192
Transmission fix! the tranny fluid was brown i flushed it and replaced it and i had air in the clutch system
__________________
Frenchy!
VinceTj is offline   Quote Quick Reply
Old 12-11-2012, 12:21 AM   #26
Jeeper
 
DasfieldmarshelsYJ's Avatar
 
Join Date: Jan 2012
Location: Boston, MA
Posts: 539
How's this going?
DasfieldmarshelsYJ is offline   Quote Quick Reply
Old 12-11-2012, 10:21 PM   #27
Jeeper
 
89quest's Avatar
 
Join Date: Oct 2012
Location: conway,n.h
Posts: 374
Im a newbee to all the mechanical stuff, but after reading the forum for a couple of months its good to see someone doing things with the 2.5. IMHO it gets such a bad rap in general. Im in, and anxious to see your outcome!!!
__________________
1989YJ 2.5L TBI 5spd. 2" body/4" susp. Lift/33x12.50x15 Pro Comp Mud Terrain
89quest is offline   Quote Quick Reply
Old 12-25-2012, 02:32 AM   #28
Jeeper
 
VinceTj's Avatar
 
Join Date: Jan 2012
Posts: 192
Quote:
Originally Posted by DasfieldmarshelsYJ View Post
How's this going?
Slow as hell got sent on exercise
__________________
Frenchy!
VinceTj is offline   Quote Quick Reply
Old 12-25-2012, 09:48 AM   #29
Jeeper
 
89quest's Avatar
 
Join Date: Oct 2012
Location: conway,n.h
Posts: 374
Im still reading and wish you the best.
__________________
1989YJ 2.5L TBI 5spd. 2" body/4" susp. Lift/33x12.50x15 Pro Comp Mud Terrain
89quest is offline   Quote Quick Reply
Old 12-25-2012, 11:25 AM   #30
Jeeper
 
VinceTj's Avatar
 
Join Date: Jan 2012
Posts: 192
Quote:
Originally Posted by 89quest View Post
Im still reading and wish you the best.
Tanks men

__________________
Frenchy!
VinceTj is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

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

Log-in

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




Download our Mobile App

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 06:03 AM.



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