Taking the plunge 4.7 stroker - JeepForum.com
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post #1 of 28 Old 04-30-2014, 06:41 PM Thread Starter
Cebby
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Cool Taking the plunge 4.7 stroker

Some of you know about my engine issues - 0331 head cracked because my wife thinks "check gauges" means keep driving when the temp gauge is railing. The cause? 8th or 9th fan relay died - I've lost count. No mechanical fan currently.

As a result, it's been guzzling coolant for over a year and hasn't sounded all that healthy overall since the incident. Few hundred miles short of 200k on the clock.

Planning on the ATK 4.7 Baja Stroker. Was told roughly 3 weeks for them to build since they don't have them in stock.

Adding 24lb injectors, 62mm TB, mechanical fan, & new water pump. I have a shorty exhaust now for my long arms. Using stock exhaust manifold currently, but plan to build a long tube header (anyone have a drawing for a 4.0 exhaust flange?). They recommend a CAI - I've had them before on other vehicles and aside from being a noisemaker, not sure how much they really help the breathing.

Any other words of wisdom out there? Things to watch for, other things to change while I'm at it. A buddy of mine with a shop is installing it - said a week.


2000 WJ Laredo 4.0 4x4 Taupe Frost - Stroker | Clayton LA w/3" Lift | 33's on JK 17's | Axles next
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post #2 of 28 Old 05-01-2014, 03:48 AM
alfaitalia
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Cool.....whats your target/hoped for horsepower and torque output?

If you can't fix it with a hammer, you've got yourself an electrical problem!
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post #3 of 28 Old 05-01-2014, 05:19 AM
icanhithimman
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I wish I could do this wont pass emissions in NY I have been told.
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post #4 of 28 Old 05-01-2014, 06:23 AM
MadderThanMax
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Yup! Photos please ..or this didn't happen Lols! Can't wait to see this baby.. You tube video of sound please
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post #5 of 28 Old 05-01-2014, 08:47 AM
Super6XJ
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have been said strokers will pass emissions, most of the time they are more efficient then the 4.0,

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post #6 of 28 Old 05-01-2014, 09:01 AM Thread Starter
Cebby
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Quote:
Originally Posted by Super6XJ View Post
have been said strokers will pass emissions, most of the time they are more efficient then the 4.0,
I've heard (and am banking on) the same - just needs to be running right. PA is an emissions testing state.

HP/TQ rated as 275/320. I'm sure that's optimal conditions. Anywhere in that ballpark is good by me. Will likely have to hit a chassis dyno for tune so I'll post up.

http://high-performance-engines.com/...duct_Code=HP88

I'm still on crap 3.55 gearing (for now) - before the demise of my stocker, it seemed to have enough power to get out of its own way - I'm sure my shorty exhaust helped. Long term plans include a ECGS D60 in the rear - hopefully the current D35 rear will hold up for a while.

2000 WJ Laredo 4.0 4x4 Taupe Frost - Stroker | Clayton LA w/3" Lift | 33's on JK 17's | Axles next
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post #7 of 28 Old 05-01-2014, 10:41 AM
MuddyWJ
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Blowing all those relays points to a bad fan. Better get that fixed before you put a stroker in. I would also suggest an all aluminum radiator like Griffin makes.
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post #8 of 28 Old 05-01-2014, 11:00 AM Thread Starter
Cebby
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On my 4th fan. I've become pretty decent at troubleshooting fan vs relay (gotten a lot of practice unfortunately).

I have the Griffin Rad

2000 WJ Laredo 4.0 4x4 Taupe Frost - Stroker | Clayton LA w/3" Lift | 33's on JK 17's | Axles next
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post #9 of 28 Old 05-01-2014, 05:08 PM
Cleaner13
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I may be out of line with this, but can the 42re hold that much power? Its not too great with stock power, that is the only thing I would worry about (along with correcting the cooling) Im not sure if its possible, but can the hydraulic fan be installed with the 4.0L engine? Ive had nothing but luck with mine and I have never gotten too hot. You can also do the write up on swapping in the plastic GM mechanical fan and clutch...(I did this on my cousins 04 wj after the electric fan failed)

2001 WJ Limited NV247 4.7
2008 KK Limited MP253 3.7
2008 WK Limited NV245 3.0 CRD
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post #10 of 28 Old 05-01-2014, 08:06 PM Thread Starter
Cebby
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I was under the impression that I could put a mechanical fan on the 4.0, but now I'm not so sure. I'll have to dig up the Jeep fan upgrade thread I saw and I'll also look for the GM fan swap (would you happen to have that one bookmarked somewhere?)

As far as the trans, it's in good shape and has been strong for me. With the invasive PCM, is there even another option for a transmission for me? (would love a manual, but would want it to be as factory looking as possible and noted how tough it was for AgitatedPancake to get his working).

2000 WJ Laredo 4.0 4x4 Taupe Frost - Stroker | Clayton LA w/3" Lift | 33's on JK 17's | Axles next
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post #11 of 28 Old 05-02-2014, 01:39 AM
MadderThanMax
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A Kenlowe Electric fan would be better.. uses up less space and still does the job. Most Rally cars have them...
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post #12 of 28 Old 05-02-2014, 06:23 AM Thread Starter
Cebby
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Quote:
Originally Posted by MadderThanMax View Post
A Kenlowe Electric fan would be better.. uses up less space and still does the job. Most Rally cars have them...
Does that fan have it's own control mechanism? The fan relays have been the bigger issue. While I don't relish the parasitic loss associated with a mechanical fan, there's no denying the insurance factor.

2000 WJ Laredo 4.0 4x4 Taupe Frost - Stroker | Clayton LA w/3" Lift | 33's on JK 17's | Axles next
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post #13 of 28 Old 05-02-2014, 07:00 AM
MadderThanMax
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More bhp for one on a Kenlowe.. I believe it does and can be pre set. Haven't had to do one for a long time.. but its the mod of choice on rally cars, custom cars and street racers..
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post #14 of 28 Old 05-02-2014, 08:29 AM
04WJUSNPA
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Cebby, on the emissions thing. PA as a state does not do emissions as recently as Feb 2014. Allegheny Co "Burgh" area and Philly are the locals where they test. If you had it registered or maybe inspected in say Armstrong or Butler county for example you wouldn't have to do the emissions. Worth a check if you spending the $ and time doing the swap. I have had 2 family members use my addy for their registration to get around the emissions.
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post #15 of 28 Old 05-02-2014, 12:14 PM
lance-tek
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Quote:
Originally Posted by Cebby View Post
I was under the impression that I could put a mechanical fan on the 4.0, but now I'm not so sure...
I put one on my 4.0. I just went to the J/Y and had it pulled off of a 4.7. It mounts to the water pump (there is a black cap covering the threads). I have been running with both for quite some time and my electric only kicks on when the A/C is running (even in traffic thus far).

I will eagerly accept any advice or help I can get. | Built Not Bought # 736
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