NAXJA Forums -::- North American XJ Association  

Go Back   NAXJA Forums -::- North American XJ Association > NAXJA Unibody Jeep Technical Forums > Jeep Cherokee XJ (1984 - 2001) > Modified Tech Discussion
HOME Member FAQ Sponsor Info Rules Bylaws E-Mail

Modified Tech Discussion Forum for Tech related discussion for Modified XJ's and MJ's.

Reply
 
Thread Tools Display Modes
  #1  
Old September 10th, 2019, 08:12
4x4JeePmaNthINg's Avatar
4x4JeePmaNthINg 4x4JeePmaNthINg is offline
NAXJA Forum User
 
Join Date: Nov 2008
Location: colorado, severance
Posts: 1,143
Unhappy 4.7 stroker, whatchu got?

I thought itd be fun to see what you all run these days, I'm curious if this is a common motor here.
I suppose add anything you can think of worth sharing so far as running a stroker, but this is what I've thought to ask.

-What are you getting for hp/tq and to the wheels if you know?
.short or long rod?
. Any odd balls built for upper end power?

-What gears/size tires?

-Anyone running one without frame stiffeners?

Is there any truth that stroker motors have a short life? I saw that somewhere once, but it didn't make much sense on the 4.0 platform. Maybe short vs long rod difference idk....


-With all the other weight and such on your rig, would you do it again or was it worth while power from 4.0-4.7?
I ask this in refernce to the loss of power through the drive train.
Reply With Quote
  #2  
Old September 10th, 2019, 08:13
4x4JeePmaNthINg's Avatar
4x4JeePmaNthINg 4x4JeePmaNthINg is offline
NAXJA Forum User
 
Join Date: Nov 2008
Location: colorado, severance
Posts: 1,143
Re: 4.7 stroker, whatchu got?

Not sure how the front got on the title lol
Reply With Quote
  #3  
Old September 10th, 2019, 08:36
RCP Phx RCP Phx is online now
NAXJA Forum User
 
Join Date: Mar 2003
Location: Phoenix,Az
Posts: 12,600
Re: 4.7 stroker, whatchu got?

Long, but all the build details and the dyno testing.........
Reply With Quote
  #4  
Old September 10th, 2019, 08:37
RCP Phx RCP Phx is online now
NAXJA Forum User
 
Join Date: Mar 2003
Location: Phoenix,Az
Posts: 12,600
Re: 4.7 stroker, whatchu got?

Oops.... https://naxja.org/forum/showthread.php?t=1140839
Reply With Quote
  #5  
Old September 10th, 2019, 09:45
RCP Phx RCP Phx is online now
NAXJA Forum User
 
Join Date: Mar 2003
Location: Phoenix,Az
Posts: 12,600
Re: 4.7 stroker, whatchu got?

Quote:
Originally Posted by 4x4JeePmaNthINg View Post
. Any odd balls built for upper end power?

Is there any truth that stroker motors have a short life? I saw that somewhere once, but it didn't make much sense on the 4.0 platform. Maybe short vs long rod difference idk....
Upper end power would be based on the cam and intake set-up.

Longevity would be based on the materials and workmanship AND the desired HP/RPM output.
Reply With Quote
  #6  
Old September 10th, 2019, 11:05
bigdaddyjlove bigdaddyjlove is offline
NAXJA Forum User
 
Join Date: Jul 2006
Location: Atalanta
Posts: 544
Re: 4.7 stroker, whatchu got?

Got two 4.6 strokers. One homebuilt, one bought from Golen. They are 9 and 10 years old respectively. Each has been in 3 jeeps at this point. I can't tell you mileage exactly, but safe to state that each is 60k+.

The Golen now has a Hesco aluminum head and Borla header. It makes good power revved out.

The homebuilt is tourquier. Just the cam selection, I believe.

Both are short rod.

Golen likes premium fuel or I get a little pinging.
Home Built is fine on mid grade in the summer, and low octane in the winter.
Reply With Quote
  #7  
Old September 10th, 2019, 17:42
RCP Phx RCP Phx is online now
NAXJA Forum User
 
Join Date: Mar 2003
Location: Phoenix,Az
Posts: 12,600
Re: 4.7 stroker, whatchu got?

The ironic thing is a Jeep 4.0 is a "de-stroked" Jeep 4.2 so your only re-storing what was designed earlier on a motor that would run forever!
Reply With Quote
  #8  
Old September 10th, 2019, 21:17
4x4JeePmaNthINg's Avatar
4x4JeePmaNthINg 4x4JeePmaNthINg is offline
NAXJA Forum User
 
Join Date: Nov 2008
Location: colorado, severance
Posts: 1,143
Re: 4.7 stroker, whatchu got?

Quote:
Originally Posted by bigdaddyjlove View Post
Got two 4.6 strokers. One homebuilt, one bought from Golen. They are 9 and 10 years old respectively. Each has been in 3 jeeps at this point. I can't tell you mileage exactly, but safe to state that each is 60k+.

The Golen now has a Hesco aluminum head and Borla header. It makes good power revved out.

The homebuilt is tourquier. Just the cam selection, I believe.

Both are short rod.

Golen likes premium fuel or I get a little pinging.
Home Built is fine on mid grade in the summer, and low octane in the winter.
Now that is cool, can't say I've read Nyonbe running a couple!!! Do you like either one more?

Quote:
Originally Posted by RCP Phx View Post
The ironic thing is a Jeep 4.0 is a "de-stroked" Jeep 4.2 so your only re-storing what was designed earlier on a motor that would run forever!
Just with more power, usable torque no doubt, and some H.P.

I don't see many folks saying they run these so it's nice to reach out for some real world opinions. I know there's countless threads about them, mainly I'm curious who's running them and the rig they fit in.

Good stuff so far guys!
Reply With Quote
  #9  
Old September 11th, 2019, 05:31
bigdaddyjlove bigdaddyjlove is offline
NAXJA Forum User
 
Join Date: Jul 2006
Location: Atalanta
Posts: 544
Re: 4.7 stroker, whatchu got?

Very different characters.

The Golen is in a street jeep. Really good shape, wide sticky street tires and a 242 for rain/snow days. For that, its fantastic. Not sure if it is what I would want for off roading. The power is fairly far around the dial, and I don't generally off road that way.

The homebuilt is better as a "truck" motor. Not as much HP, but torque from right off idle. Plus its much cheaper and if I ruin it off road (catastrophically overheat/off angle oil starvation/hydrolock...) I can re-build/re-place inexpensively.

Building a Commanche into a >'98 HO right now. Once its together and running, I'm building another homemade. Probably just the same as the first one.
Reply With Quote
  #10  
Old September 11th, 2019, 07:08
old_man's Avatar
old_man old_man is offline
NAXJA Member
 
Join Date: May 2003
Location: Loveland, Colorado
Posts: 15,684
Re: 4.7 stroker, whatchu got?

I built my stroker from scratch almost 20 years ago. It has over 250k miles. The key is to not just throw together some parts and think all is fine. You need to monitor the engine and make sure the ECU is handling everything within parameters. The best thing you can do is to add an AFR gauge and monitor the fuel air ratio. Running way too rich or too lean is a recipe for destruction. I had to build an adjuster for the MAP and play with what injectors I ran.

My stroker has been lightly ported with headers and 2.5" exhaust. The cam will have a ton to do with how you set it up. Mine is a low rpm "RV" cam from Crane that is no longer in business. I also bored my throttle body. For me, the most important aspect was getting the quench height adjusted. Using the H802CP pistons and the thin metal MOPAR performance head gasket, coupled with decking the block around .025" yielded a quench height of around .053. I also cc'd the heads. This allows me to run the lowest grade pump gas, even with the higher compression with no ping. My highway MPG is around 21. I get 18 MPG towing my teardrop.
__________________
Tom Houston - Former Colorado Chapter President , Terminal Adrenaline Junkie, and Rocket Scientist
Loveland, Colorado My teardrop build
You're just jealous because the voices don't talk to you.
Reply With Quote
  #11  
Old September 11th, 2019, 08:21
bigdaddyjlove bigdaddyjlove is offline
NAXJA Forum User
 
Join Date: Jul 2006
Location: Atalanta
Posts: 544
Re: 4.7 stroker, whatchu got?

I am running that same (or maybe similar) Crane Cam, and I didn't realize they quite making it.

Just went to their website and verified. They don't list ANY AMC/Jeep cams.

Any ideas or recommendations for a suitable substitute?
Reply With Quote
  #12  
Old September 11th, 2019, 08:24
RCP Phx RCP Phx is online now
NAXJA Forum User
 
Join Date: Mar 2003
Location: Phoenix,Az
Posts: 12,600
Re: 4.7 stroker, whatchu got?

This is a popular one with Russ......
Comp Cams 68-232-4 camshaft - Lift(.460" Int/.476" Ex) Duration(250 Int/256 Ex)
Reply With Quote
  #13  
Old September 11th, 2019, 08:37
RCP Phx RCP Phx is online now
NAXJA Forum User
 
Join Date: Mar 2003
Location: Phoenix,Az
Posts: 12,600
Re: 4.7 stroker, whatchu got?

I love generic terms like RV and 3/4 race cam, at my shop I had a "clearance/sale" bin so I put a cam in there labeled 3/4 race cam. I had tons of people pick it out and throw up on the counter to purchased. I would start laughing and tell them to take a close look at what they were buying.

"I had lathe cut 1/4 of the cam off, hence 3/4 cam"
Reply With Quote
  #14  
Old September 11th, 2019, 10:04
bigdaddyjlove bigdaddyjlove is offline
NAXJA Forum User
 
Join Date: Jul 2006
Location: Atalanta
Posts: 544
Re: 4.7 stroker, whatchu got?

I bought the one i did based on recommendations from here. I have been happy with the result, but I trust wiser heads than mine with cam selection. Just not something I know tons about.
Reply With Quote
  #15  
Old September 11th, 2019, 11:59
old_man's Avatar
old_man old_man is offline
NAXJA Member
 
Join Date: May 2003
Location: Loveland, Colorado
Posts: 15,684
Re: 4.7 stroker, whatchu got?

Quote:
Originally Posted by bigdaddyjlove View Post
I am running that same (or maybe similar) Crane Cam, and I didn't realize they quite making it.

Just went to their website and verified. They don't list ANY AMC/Jeep cams.

Any ideas or recommendations for a suitable substitute?
I have the spec's filed away on the cam back home. I will look the next time I get home. I'm working in Utah.

Crane went out of business. Somebody bought the name but it is not the same company.
__________________
Tom Houston - Former Colorado Chapter President , Terminal Adrenaline Junkie, and Rocket Scientist
Loveland, Colorado My teardrop build
You're just jealous because the voices don't talk to you.
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Will my stroker beat CRASH's stroker? Goatman Jeep Street and Performance 29 February 24th, 2018 20:45
4.7 stroker POLAR_JEEP_04 Harlan 15th birthday Swap Meet 13 June 3rd, 2014 15:28
Test Results from Stroker Overheat (Overheated the Stroker Badly- Part DUEX) NHxj4x4 OEM Tech Discussion 36 January 24th, 2010 17:54
Finally took apart my Stroker (Stroker Overheated Badly) Part Trois NHxj4x4 OEM Tech Discussion 7 April 15th, 2008 10:45
what to get for a stroker rojofixj Modified Tech Discussion 2 November 16th, 2006 06:49


All times are GMT -7. The time now is 15:24.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
NAXJA and NAXJA logo's Copyright NAXJA. All content/images Copyright NAXJA 1999-2014