My Magnum TJ, project "Whoops my stroker wiped it's cam bearings" - Page 7 - JeepForum.com

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post #91 of 437 Old 06-10-2013, 01:29 PM
Mike934
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Quote:
Originally Posted by CobraMarty View Post
My 4.0L made 138rwhp totally stock and 150rwhp with few bolt-ons on a mustang dyno.

Would love to see dyno of this V8!!
Mine a 4.0 stroker to a 4.2l...basically minor port & port, slight compression bump, .090 more stroke and .060 over bore. APN header, 2.5" magnaflow catback, 52mm throttle body, map adjuster with 703 (21lbs) injectors. Full renix setup. If I did a ho head swap I would probably be another 10-15 hp & torque above where I'm at now
Also I was on 33s and 3.55s with a 5speed. I swapped in auto axles to ditch my disconnect & 35. It's now on 4.56s. Everything I did my motor up for just under 1200 with ALOT of new parts & upgrades. The gearing sapped some power I'm sure, same goes for the tb. I'm sure I'd pick up some more there as well. I can feel the difference but like doublins said its not a "omg type difference". Deffinetely better though.

From what I've seen and found the renixs dyno in around 100-112hp stock at the wheels. So I'm happy with the gains I got for what was spent, it needed a rebuild so I upgraded a bit while still being a cheap ***


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Overlanders do it over land via overlanding because they like to overland?
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post #92 of 437 Old 07-05-2013, 06:42 AM Thread Starter
doublins
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Passed MD emissions today with the 5.2 swap




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98 TJ Street Sleeper- 408ci Stroked Magnum V8

My Magnum V8 Build Thread:
http://www.jeepforum.com/forum/f22/m...rings-1516649/
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post #93 of 437 Old 07-07-2013, 07:09 AM
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post #94 of 437 Old 07-10-2013, 09:41 PM
dmgiff
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Just finished reading your thread; it could be my thread too. I finished this swap last year and am on to another huge project right now. I also had 4.88 gears and couldn't stand it on the highway. I went to 4.10s and if I had it to do over, I would probably do 4.56. My mileage is suckier than yours. I average about 11 and I drive it gently trying to coax more mpg out of it, but it is not to be. I am in the middle of a Hughes Air Gap intake swap and lots of folks report mileage gains with that, so we'll see.... Good job on your thread.
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post #95 of 437 Old 07-11-2013, 05:12 AM Thread Starter
doublins
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Quote:
Originally Posted by dmgiff View Post
Just finished reading your thread; it could be my thread too. I finished this swap last year and am on to another huge project right now. I also had 4.88 gears and couldn't stand it on the highway. I went to 4.10s and if I had it to do over, I would probably do 4.56. My mileage is suckier than yours. I average about 11 and I drive it gently trying to coax more mpg out of it, but it is not to be. I am in the middle of a Hughes Air Gap intake swap and lots of folks report mileage gains with that, so we'll see.... Good job on your thread.
Thanks!

Regarding your gearing, what is bad about the 4.10s? Did it make a big difference in acceleration? I thought about 4.56s but didn't think it'd be enough (haven't pulled trigger on anything yet, still have the 4.88s).


Regarding mileage, are you running the stock tune? I had Ryan Hogan (FlyinRyan) tune my 5.2 PCM with an SCT tuner, and we made the thing fricking rip- the stock tune makes the thing a total pig that makes more noise than power. We remapped the timing advance tables, leaned out the A/F at WOT (it runs into the high 10:1, low 11:1 AFR with the stock tune), and adjusted different MAP targets for AFR to richen up some partial throttle stuff. Anyway, long story short, it's got WAY more torque after tuning than the stock tune, well worth the investment IMO.

Let me know how the AirGap swap goes, I've looked at it.

-Chris

98 TJ Street Sleeper- 408ci Stroked Magnum V8

My Magnum V8 Build Thread:
http://www.jeepforum.com/forum/f22/m...rings-1516649/
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post #96 of 437 Old 07-11-2013, 09:46 AM
dmgiff
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It's not that the 4.10 are all that bad; in fact they cured the problem I felt I had which was the screaming RPM at highway speed. It runs perfectly at highway speed now. Exactly the way I think it was meant to. I turn about 2300 RPM at 65 mph now. But I definitely lost some acceleration that I had with the 4.88s. I did like punching it in first and barking the tires at will. It won't do that now.

I am on the stock tune and you described it perfectly when you said it makes a lot of noise (sounds awesome) but doesn't really go anywhere. To be honest, although it is better than the 4.0, I am little underwhelmed by the swap. If I had it to do over again, I would either go LS or 5.9. I am still considering the 5.9 as it would be an easy swap now that all the hard part is done. Having said that, I had a line on a 5.9 and almost pulled the trigger but figured I'd end up putting at least 2 grand into a rebuild for it and thought well, I could put half that money in the 5.2 and see where I end up. Hence the outrageously expensive Hughes intake manifold. My plan at this point is to get the intake swapped, then, based on your recommendation, talk to FlyinRyan about a tune, and if I'm still not happy, a cam.

Speaking of the tune, could you explain the process to me? Do you buy the tuner and send it to him or pay him and he procures the tuner and then writes the tune?

I am in the middle of a paint job right now and the jeep is in a thousand pieces. The paint is done, but I figured while I have the front end apart, hydraulic bumps would be a good idea. You mentioned somewhere in your thread about HP30 guys... that's me. I redid all my suspension with a custom mid arm build and I have interference issues with the drive shaft to bell housing. Right now I have just over 4" of uptravel in the front. I'm adding the bump stops and then I'm going to do a little creative trimming on the bellhousing and maybe see about a smaller diameter driveshaft to get another inch or so and see how that goes.

Hoping to have it back together by the end of August. Hope I'm not cluttering your thread, but you did a good job writing it and it honestly could be my story as well. I was very intimidated by the swap and the wiring and all of that, but the only cure is to dive in and figure it out as we go. Like you, I think paying $700 for someone to transplant a few wires is outrageous. I enjoyed figuring it out myself. It ain't all that hard....
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post #97 of 437 Old 07-19-2013, 02:02 AM
anonymousian2
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Quote:
Originally Posted by dmgiff View Post

Speaking of the tune, could you explain the process to me? Do you buy the tuner and send it to him or pay him and he procures the tuner and then writes the tune?
Bump
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post #98 of 437 Old 07-19-2013, 09:23 AM Thread Starter
doublins
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Quote:
Originally Posted by anonymousian2 View Post
Bump
Whoops, sorry-

I purchased my SCT through Ryan Hogan (flyinryanporting@gmail.com)- You give him the alphanumeric code off of the front of the PCM so he knows what model/version of firmware you have, then he'll send you a base tune.

I used a few Innovate products in conjunction with my innovate wideband to be able to datalog while I drove around, then simply emailed my logs back to him and he'd make adjustments and send me a new tune. We went back and forth a couple of times until we had it where we wanted- I've used the SCT to tune both my stroker motor and now my 5.2- I think each SCT unit is good for up to three PCMs before you have to buy extra licenses through SCT, not sure exactly how it works, but I do know that it's simple to use for the end user. The most complicated part is wiring in a good data logger, but if you're able to do a 5.2 swap, that part is pretty self-explanatory.

Ryan's really knowledgable and responsive, and I've been very happy with him.

Hope this helps.

98 TJ Street Sleeper- 408ci Stroked Magnum V8

My Magnum V8 Build Thread:
http://www.jeepforum.com/forum/f22/m...rings-1516649/
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post #99 of 437 Old 07-25-2013, 04:04 AM
anonymousian2
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I'm pretty ignorant of anything in regards to tuning, so with that in mind, what SCT tuner do you have?
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post #100 of 437 Old 07-25-2013, 10:56 AM Thread Starter
doublins
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Quote:
Originally Posted by anonymousian2 View Post
I'm pretty ignorant of anything in regards to tuning, so with that in mind, what SCT tuner do you have?
I used the SCT DCX, but it looks like theyīve discontinued that one and replaced it with the X3, which looks to have some more features.

If youīre really interested in going that route, Iīd talk to Ryan, heīll be able to tell you much more than I can. All I do is data log and talk to him about any concerns or issues, we discuss drivability, power, throttle response, etc etc, we log what data we need, and then he creates a new PCM flash for me that I load into the PCM with the DCX. Then we lather, rinse, and repeat.

98 TJ Street Sleeper- 408ci Stroked Magnum V8

My Magnum V8 Build Thread:
http://www.jeepforum.com/forum/f22/m...rings-1516649/
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post #101 of 437 Old 07-31-2013, 09:54 PM
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Thought I check out your build...you did make that look quite painless and economical to boot...where did you get the valve covers....

Be carefull while Hugging the Trees...They leave dents on your Jeep....

Shhhhhh I'm not crazy...It's just the voices in my head
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post #102 of 437 Old 08-01-2013, 10:00 AM Thread Starter
doublins
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Quote:
Originally Posted by freaknajeep View Post
Thought I check out your build...you did make that look quite painless and economical to boot...where did you get the valve covers....
Thanks!

Valve covers I bought from Summit, they are Mopar Performance aluminum valve covers- mine were grand cherokee magnum covers, because I wanted them to say ĻJeep,Ļ but they offer them for most any dodge vehicle.

-Chris

98 TJ Street Sleeper- 408ci Stroked Magnum V8

My Magnum V8 Build Thread:
http://www.jeepforum.com/forum/f22/m...rings-1516649/
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post #103 of 437 Old 08-08-2013, 04:29 PM Thread Starter
doublins
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Update- so far the jeep has been just totally awesome

Been working on some little things

Repainted center console- used to be spice
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And installed a homelink garage door opener in the armrest- this works AWESOME, now I can just leave the top off and garage it when arriving home without having to get out and open the door from the touchpad
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98 TJ Street Sleeper- 408ci Stroked Magnum V8

My Magnum V8 Build Thread:
http://www.jeepforum.com/forum/f22/m...rings-1516649/
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post #104 of 437 Old 08-08-2013, 04:35 PM Thread Starter
doublins
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Also, I wrapped my intake with header wrap, made a custom heat shield to keep hot radiator air away from the filter, and installed an oil catch can just to prevent any possible blowby from causing detonation (I'm tuned with an aggressive timing map).

The motor has 170K on it so I was a little concerned about the possibility, but my fears looked to be unwarranted as there is very very little oil that has collected in it over about 3K miles.

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98 TJ Street Sleeper- 408ci Stroked Magnum V8

My Magnum V8 Build Thread:
http://www.jeepforum.com/forum/f22/m...rings-1516649/
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post #105 of 437 Old 08-08-2013, 07:54 PM
dmgiff
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Cool. My paint is done, jeep is driveable again, finally. I talked to FlyinRyan and unfortunately the Tuners he needs are out of stock so I'm on hold for that.
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