Another 5.2L YJ thread - Page 14 - JeepForum.com
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post #196 of 231 Old 11-07-2013, 04:57 PM
SunDevilJeeper
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Here we can only use an engine that is the same model year or newer. It sucks, but I guess that's what we get for letting Democrats control the state..

Enough politics though, I am going to start searching for that ellusive bellhousing...

Which headers did everyone say will work with the 3.9L bellhousing?
Patriot/Summit tight tuck headers (not recommended) or the Hedman block huggers.


car-part.com is your friend when looking for stuff like this in case you didn't already know about it.


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post #197 of 231 Old 11-07-2013, 07:29 PM Thread Starter
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Another question I have is what to do about gearing?

35" tires will be the rubber of choice, so what to go with...

My initial research and edumacated guessing tell me that I should go with 4.10's. I don't want to over-rev the V8 on the highway, I'd like to keep it around 2100rpms in 5th at 65 mph. Don't care if I have to downshift for long steep highway grades.

All about that unibody life.
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post #198 of 231 Old 11-07-2013, 08:32 PM
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Quote:
Originally Posted by Xpress View Post
Another question I have is what to do about gearing?

35" tires will be the rubber of choice, so what to go with...

My initial research and edumacated guessing tell me that I should go with 4.10's. I don't want to over-rev the V8 on the highway, I'd like to keep it around 2100rpms in 5th at 65 mph. Don't care if I have to downshift for long steep highway grades.
Im going to be running 4.56 with my 35's mainly because that is what I have currently in my axles. I do plan to jump up to 37" as soon as the 35's wear out. I think 4.10 will be fine with the 5.2. If I remember correctly moparfreak runs 4.56 with his and 35's too.
My buddy runs a sbc 350 with a sm465 and 4.10 with 37's and he has more than enough power to cruise. I know there is some sort of a calculator to figure out your final drive ratio.

build thread: http://www.jeepforum.com/forum/f22/skyj-eccentric-build-1467426/ '90 YJ 5.2 magnum MPI, AX15, NP231 SYE, Dana 30 4.56 open/ 8.8 4.56 detriot locker. 1" shackles
2" BL, 4" stretch all on saggy waggy springs.
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post #199 of 231 Old 11-07-2013, 10:27 PM
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Quote:
Originally Posted by Xpress View Post
Another question I have is what to do about gearing?

35" tires will be the rubber of choice, so what to go with...

My initial research and edumacated guessing tell me that I should go with 4.10's. I don't want to over-rev the V8 on the highway, I'd like to keep it around 2100rpms in 5th at 65 mph. Don't care if I have to downshift for long steep highway grades.
The 5.2 Magnum and LA 318 aren't Ford engines. The mighty 318 is the Mopar engine that gained a massive reputation for being a stout *** little engine. Those things are legendary for taking a serious beating and keepin on afterward. The cash for clunkers program proved that legend when a lot of people had to try ther damnest to kill those 5.2s.

So with that being said, 4.10 will be fine. A little under geared, but it'll do. You'll wanna go steeper than that though.

4.56 if you do a lot of highway driving and care about MPGs, 4.88 if you prefer more power, and a better crawl ratio, but don't care about highway RPMs and fuel mileage.

Either way, you'll be around 2700-3000 RPM with 4.88s and 35s at 75mph

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post #200 of 231 Old 11-08-2013, 06:48 PM Thread Starter
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Originally Posted by SunDevilJeeper View Post
Either way, you'll be around 2700-3000 RPM with 4.88s and 35s at 75mph
Like I said I'd like to stay closer to 2000 rpms for that factory feeling. I'm anal about RPM's.

If 4.10's and 35's is too tall then I could always drop a tire size or 2 on the road, then keep the 35's for offroad shens.

All about that unibody life.
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post #201 of 231 Old 11-09-2013, 03:52 AM
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if you want to retain a factory feeling you may want to be slightly over 2000rpm's. remember that with larger tires comes more rolling resistance and added weight to the axle. the 5.2 starts to wake up around 2200-2300 rpms, keeping the revs lower than 2000 will cause your motor to always be straining at highway speeds. when i was running 31x10.5x15's on my stock gearing with the 5.2 i was only at about 1700rpms at 60mph, needless to say i rarely got to use 5th gear.

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post #202 of 231 Old 11-09-2013, 07:58 AM Thread Starter
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I don't mind running 2200-2300 rpm's, it's just that I don't want to be over-revving it at 2800+. Obviously it's not going to be a trailer queen

I'd like to retain some decent fuel economy whenever I do decide to accomplish some urban krawling....

All about that unibody life.
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post #203 of 231 Old 11-11-2013, 09:59 AM Thread Starter
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Bump.

Looks as though KC has decided that they want their lights on my rig. They just introduced a few new lines of LED lights and expanded their other lines. Still waiting to see if they introduce a 5x7 LED headlight- they already introduced a 4x6 LED headlamp that will work perfectly on my motorcycle. And they aren't outrageously priced either, rather reasonable, comparable to the other manufacturers, with even more light output...

And anybody that knows me knows that I'm bat**** crazy when it comes to light... There is not enough light out there to satisfy my needs... Hell my bike has 4 ****ing LED lights on it and that's still not enough!!




All about that unibody life.
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post #204 of 231 Old 11-11-2013, 12:17 PM
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The entire ****ing world is contained within the internet... and not a single ****ing picture or video of the LZRs in action is anywhere out there on the net. Just people taking a picture of the light itself, or diagrams showing what it supposedly does.

Makes me wonder if the KC LZR isn't worth a damn, it's been out for quite a while. There should be loads of info on them by now.

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post #205 of 231 Old 11-11-2013, 09:03 PM Thread Starter
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I think it's because when people think of KC, they think of Halogen round spot lights. And to be fair I haven't seen much advertising for them, aside from the occasional Facebook post, not as of late. Not much in offroad magazines or around the forums either.

Either way, I want to stick with KC. They have done me good in the past, no reason just to abandon them with new product lines coming out.

All about that unibody life.
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post #206 of 231 Old 11-18-2013, 06:07 AM
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Just wanted to add that I drove my 5.9 yj yesterday and it was a blast.
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post #207 of 231 Old 11-18-2013, 07:36 AM
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I think it's because when people think of KC, they think of Halogen round spot lights. And to be fair I haven't seen much advertising for them, aside from the occasional Facebook post, not as of late. Not much in offroad magazines or around the forums either.

Either way, I want to stick with KC. They have done me good in the past, no reason just to abandon them with new product lines coming out.
Their initial price tag might be why nobody has really bought them. I remember looking at them in the qtec catalog and saying "**** that" a while back.

I just wish there were some actual videos or pictures of their brightness.

Quote:
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Just wanted to add that I drove my 5.9 yj yesterday and it was a blast.
Literally.

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post #208 of 231 Old 11-18-2013, 10:36 AM Thread Starter
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^Their pricing is right on par with some of the other manufacturers high end lights.

Quote:
Originally Posted by Chris View Post
Just wanted to add that I drove my 5.9 yj yesterday and it was a blast.


As far as the 3.9L bellhousing goes, does it have to be a specific year or drivetrain (I.E. 4x4 or 4x2)?

All about that unibody life.
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post #209 of 231 Old 11-18-2013, 11:16 AM
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Originally Posted by Xpress View Post

As far as the 3.9L bellhousing goes, does it have to be a specific year or drivetrain (I.E. 4x4 or 4x2)?
Mine is from a '94 2 wheel drive with the 3.9L. I think it has to be a 2 wheel drive but not positive about that.

build thread: http://www.jeepforum.com/forum/f22/skyj-eccentric-build-1467426/ '90 YJ 5.2 magnum MPI, AX15, NP231 SYE, Dana 30 4.56 open/ 8.8 4.56 detriot locker. 1" shackles
2" BL, 4" stretch all on saggy waggy springs.
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post #210 of 231 Old 11-19-2013, 09:21 AM Thread Starter
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Anybody else?

I got a quote from Quality auto Parts for $325 shipped from a 1995 3.9L 4x2. Not quite sure I want to spend that much on a bellhousing...

All about that unibody life.
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