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  #13  
Old 09-30-2014, 12:47 PM
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Quote:
Originally Posted by dmsfun View Post

Umm, sorry but I respectfully disagree. Been there done that with the CAI, and so glad to be rid of it. The noise is LOUD and unpleasant, not sweet Hemi sound, plus the worst part is it drives worse than stock after spending so much money. Did direct comparisons and low end / midrange torque is lost with the CAI, so you have to rev it to get going, plus tip in throttle response is worse so you have to mash the go pedal and downshift to pass.. IF there are any HP gains they are few and well up in RPM, where the Hemi spends very little of it's overall time. For a worthwhile mod, get an Intune with Hemifever CMR tune for not much more than a CAI.
Never made a HP gain claim. Sound is always subjective and you won't hardly find a neg sound comment on the K&N CAI. It is definitely the loudest option vs say a Volant. Not gonna turn OP's tune up thread into a CAI or other HP discussion. I was just making a sounds cool comment. Personally I wouldn't put any mod money into a 100k motor from unknown background but that's me.

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  #14  
Old 09-30-2014, 01:22 PM
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Re: Tune Up

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Originally Posted by 14SummitHemi View Post
If you want her to sound bad arse throw on the K&N FITPK....amazing sound, but your mpg will suffer do to the need to "hear" that sound every time you start off
Actually, I think the exhaust was already upgraded, which really makes this the meanest sounding Jeep I've ever owned. I'll do a CAI later down the road. I haven't noticed too much gain using them on computer controlled cars.
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  #15  
Old 09-30-2014, 01:28 PM
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Quote:
Originally Posted by Furyous68 View Post

Actually, I think the exhaust was already upgraded, which really makes this the meanest sounding Jeep I've ever owned. I'll do a CAI later down the road. I haven't noticed too much gain using them on computer controlled cars.
Great point, that's why u do all mods first then hemifever tune last so when they get your data runs and tweak it all the small benefits the mods give aren't negated by stock tune.
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  #16  
Old 09-30-2014, 01:37 PM
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Re: Tune Up

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Originally Posted by Furyous68 View Post
Actually, I think the exhaust was already upgraded, which really makes this the meanest sounding Jeep I've ever owned. I'll do a CAI later down the road. I haven't noticed too much gain using them on computer controlled cars.

Exactly, the ECU will adjust itself in learning mode, and after a while it runs worse than stock. There is nothing to gain with intakes in any circumstance, unless you install headers or SRT exh. manifolds, as the Jeep 5.7 flow restriction issue is with the well documented log style exhaust manifolds...there is more than enough air coming in, just can't get out.
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  #17  
Old 09-30-2014, 04:17 PM
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Re: Tune Up

Which makes me ask... do the SRT8 manifolds just "drop in" on our 5.7l WK's or are there a lot of extra modifications needed?
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  #18  
Old 09-30-2014, 06:19 PM
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Re: Tune Up

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Originally Posted by Furyous68 View Post
Thanks jeepgcoman, I plan on soaking the EGR bolts w/ PB Blaster and letting it sit over night before I attempt.. remember... I have "Old Iron" too, and it rusts . Though, by now, I've pretty much replaced everything on that engine & don't need to worry about it too much.

Edit- just noticed you said "PCV" valve... not EGR. Any tips for the PCV valve?

14summithemi: I just ordered new O2 sensors. Weren't too pricey through Roch Auto & Summit. NGK sensors. Both were less than $35 ea. They're about $100 a piece for my Volvo, so it wasn't too bad.
You'll be OK with the EGR Valve by doing as dmsfun says.

No, I was talking about not breaking the PCV Valve off in the housing. You'll see how easy it would be to break once you get the old one out. All I am saying is, be careful, as others have broken them off in the housing and it takes a little work to get the broken piece out.

On the O2's, getting the NTK's is a good move, as they are OEM on the Hemi's. With your miles it is also wise to change them, unless you know they've been changed recently. Doing all this stuff should make quite a difference in performance, especially if the vehicle has not received much TLC. Here's a thread I did a few years ago regarding my experiences and research on O2's: Oxygen Sensors and Their Role in Engine Management--A Primer Hope it helps a little.
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  #19  
Old 09-30-2014, 06:54 PM
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Re: Tune Up

You guys have been very helpful. Thanks again!
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  #20  
Old 10-10-2014, 08:52 PM
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Re: Tune Up

OK.. I feel like an idiot now. I knew the car had coil packs... but I thought there was a plug wire involved somewhere. My Tahoe has coil packs... but use a plug wire to go from the pack to the plug. Plus, when Summit racing has plug wire options for a "2005 Jeep Grand Cherokee Limited 5.7l"... I figured I'd order a brand I'm familiar with (Taylor).

These trucks don't use any kind of spark plug wire... do they



Oh well. I can always send the wires back. LOL
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  #21  
Old 10-12-2014, 01:49 AM
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Quote:
Originally Posted by Furyous68 View Post
OK.. I feel like an idiot now. I knew the car had coil packs... but I thought there was a plug wire involved somewhere. My Tahoe has coil packs... but use a plug wire to go from the pack to the plug. Plus, when Summit racing has plug wire options for a "2005 Jeep Grand Cherokee Limited 5.7l"... I figured I'd order a brand I'm familiar with (Taylor).

These trucks don't use any kind of spark plug wire... do they



Oh well. I can always send the wires back. LOL
2005 hemi does have plug wires. 2006 and up has just coils.
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  #22  
Old 10-12-2014, 04:04 PM
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Quote:
Originally Posted by motorguy View Post

2005 hemi does have plug wires. 2006 and up has just coils.
Yup they do.. i recommend the Taylor shorties. Cleans up the rat nest that is above your intake like no other. They dont make them for a jeep 5.7 but used some for a dodge 5.7 and haven't had any problems. The firing pattern will change slightly but wont cause an issue.
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  #23  
Old 10-12-2014, 10:04 PM
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Re: Tune Up

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Originally Posted by motorguy View Post
2005 hemi does have plug wires. 2006 and up has just coils.
Yeah... well I was even more embarrassed after I actually took off the engine cover (after my last post) & saw I was wrong (again). Good thing I ordered the plug wires after all

So.. got everything done except the O2 sensors & the catch can. Catch can is on order... and I need another set of O2 sensors... did you know there are 4???? LOL. I definitely need to do a little more research before I order parts from now on.

At least half of my plugs were loose... which can't be good. Replacing the plugs & wires definitely restored some power, butI'm not sure it did anything for the fuel mileage. I guess if the o2 sensors are fouled, then it still would be getting shitty mileage no matter plug condition.

Quote:
Originally Posted by Sleeps View Post
Yup they do.. i recommend the Taylor shorties. Cleans up the rat nest that is above your intake like no other. They dont make them for a jeep 5.7 but used some for a dodge 5.7 and haven't had any problems. The firing pattern will change slightly but wont cause an issue.
I got the Taylor's spec'd for the Jeep. The rat's nest isn't too bad since it's all under the engine cover. I should buy some new spacers though. The 8.2mm wires are a little too much for the stock spacers.
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  #24  
Old 10-12-2014, 10:13 PM
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Ya i dont use the engine cover so i was forced to look at it. Lol
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