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Unread 07-28-2012, 07:09 PM   #31
torchd
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Quote:
Originally Posted by zander21510 View Post
Mhm i see, but do you see how on mine it shares the nipple thing with the cruise line? Perhaps that has something to do with it, did you have on of those nipple things on your old manifold?
My old manifold did not have to nipples on 1 port like yours has....

BTW did you see I updated you HOW TO for your injecotrs thread??

WTF should I do

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[b]1998 Jeep Grand Cherokee Laredo[/b]
2" BB Pucks | SkyJacker Hydro Shocks | Rubicon Wheels | Cooper 245/75/16 Tires

[b][color=red]2002 Trans Am[/b][/color]
Cam, Full Exhaust, Stock Heads, Stock LS6 Intake and Stock 10 bolt with 3.42s
[b]420 RWHP and 382 RWHTQ[/b]
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Unread 07-28-2012, 07:49 PM   #32
zander21510
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Quote:
Originally Posted by torchd View Post
My old manifold did not have to nipples on 1 port like yours has....

BTW did you see I updated you HOW TO for your injecotrs thread??

WTF should I do
I did see glad it was successful for you!

That is very odd...I guess the vacuum lines were a bit different in 98. I don't understand what it could be :P i'm trying to get my brain around the physics of it...did you try moving the lines around in different places to see if other arrangements work?
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Unread 07-28-2012, 08:17 PM   #33
torchd
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Quote:
Originally Posted by zander21510 View Post
I did see glad it was successful for you!

That is very odd...I guess the vacuum lines were a bit different in 98. I don't understand what it could be :P i'm trying to get my brain around the physics of it...did you try moving the lines around in different places to see if other arrangements work?
No I haven't tried to re-arrange the vacuum lines.. I might be able to re-arrange some without having to extend some. I'll have to give it a shot on Monday
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[b]1998 Jeep Grand Cherokee Laredo[/b]
2" BB Pucks | SkyJacker Hydro Shocks | Rubicon Wheels | Cooper 245/75/16 Tires

[b][color=red]2002 Trans Am[/b][/color]
Cam, Full Exhaust, Stock Heads, Stock LS6 Intake and Stock 10 bolt with 3.42s
[b]420 RWHP and 382 RWHTQ[/b]
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Unread 12-13-2012, 11:16 PM   #34
BoostinChick
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Cruising around doing some reasearch outside of this forum, I found this article very interesting: http://www.jpmagazine.com/techarticl...ing_true_lies/

Here is the snippet specifically about this upgrade. They actually are reporting hp loss on a stock motor. Everything else seems to add up to what has been mentioned, though. That without the PnP (port and polish) it's a "wasted effort". My interest peaked when they mention killing low and mild speed power and torque as those are pretty key for wheeling. Has anyone been able to confirm/deny if that is true?

Quote:
'99-Up Horseshoe Intake
Myth: According to that great wealth of information that is never wrong, the Internet says you'll get a 5-30hp gain thanks to the '99-up 4.0L's swooped, equal length runners and larger plenum volume.
Our Thoughts: While a free-flow intake manifold can deliver more power, it's only going to allow as much air to flow as the cylinder head and camshaft will call for. Upping the intake runner volume too much will cause the intake charge to lose velocity, killing low- and mid-speed power and torque. On a '98-earlier engine running a stock camshaft and unported cylinder head, it's wasted effort.
Claimed Gains: 5-30hp
Actual Gains: 5hp loss on Trasborg's '98 XJ (Project Mileage Master)
I was looking to do this swap along with a 62mm bored throttle body.

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Unread 12-14-2012, 06:54 PM   #35
coralman
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And the story continues.............
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Unread 12-14-2012, 07:40 PM   #36
zander21510
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I noticed it. I can climb hills better without losing speed. Like most things its not much by itself but with injectors and exhaust and such it can help
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Unread 12-14-2012, 10:18 PM   #37
torchd
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I definitely was able to tell a difference. But then again, the same day that I did the intake swap, I aslo installed a header, the WJ intake as well as the "703" injectors.


Then 1.5 months later, I re-did the whole exhaust. The entire exhaust is 2.5" from the header collector all the way out back. I am also using a 2.5" IN/OUT Magnaflow metallic spun cat as well as a 2.5" IN/OUT MagnaFlow muffler.

I would definitely recommend this mod. I still want to get a bigger TB as well as a TB spacer.
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[b]1998 Jeep Grand Cherokee Laredo[/b]
2" BB Pucks | SkyJacker Hydro Shocks | Rubicon Wheels | Cooper 245/75/16 Tires

[b][color=red]2002 Trans Am[/b][/color]
Cam, Full Exhaust, Stock Heads, Stock LS6 Intake and Stock 10 bolt with 3.42s
[b]420 RWHP and 382 RWHTQ[/b]
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Unread 01-22-2013, 10:01 PM   #38
Football47
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Zander, with the new manifold and 703's, how much did you gain in mpg? What did you get before and after?
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Unread 01-22-2013, 10:11 PM   #39
zander21510
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Zander, with the new manifold and 703's, how much did you gain in mpg? What did you get before and after?
Its really hard to say exactly since I upgraded other things too...but I remember before I had the jeep when it was unmodded my dad would be lucky to get 16-18 mpg on the highway, 11-10 city. Nowadays I get about 13 or so city 19 highway. Maybe more now with proper sized tires lol.
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Unread 01-23-2013, 02:39 AM   #40
Football47
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Originally Posted by zander21510 View Post
Its really hard to say exactly since I upgraded other things too...but I remember before I had the jeep when it was unmodded my dad would be lucky to get 16-18 mpg on the highway, 11-10 city. Nowadays I get about 13 or so city 19 highway. Maybe more now with proper sized tires lol.
Damn... mines not modded at all and I get 18mpg in the winter time and like 20-21mpg in the summer. Tires are 235/75/15... Need more confirmations on mpg and horsepower!
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Unread 01-23-2013, 11:51 AM   #41
zander21510
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Damn... mines not modded at all and I get 18mpg in the winter time and like 20-21mpg in the summer. Tires are 235/75/15... Need more confirmations on mpg and horsepower!
Those are great numbers! It's been said before and I'll say it here, doing just one thing won't let you see a lot. I started noticing improvements after I put my glasspack and hi-flow cat on. Easy in, easy out. If you do something to the intake, you will probably need to do something in the exhaust.
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Unread 01-23-2013, 12:23 PM   #42
bananaslug
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Dont have time to read through all this, but just throwing out another rumor: That this is only really an upgrade for the 93-95 I6s.

This has probably been linked, but I remember reading it in here:
http://mallcrawlin.com/forum/showthr...L-DYNO-NUMBERS!
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Unread 01-23-2013, 01:37 PM   #43
zander21510
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Originally Posted by bananaslug View Post
Dont have time to read through all this, but just throwing out another rumor: That this is only really an upgrade for the 93-95 I6s.

This has probably been linked, but I remember reading it in here:
http://mallcrawlin.com/forum/showthr...L-DYNO-NUMBERS!
The 93-95 & 96-98 intakes are identical except for some brackets for the PS pump, so it is an upgrade for all ZJs 93-98. I used that post as the base of this write-up
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Unread 01-23-2013, 01:40 PM   #44
bananaslug
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Originally Posted by zander21510 View Post
The 93-95 & 96-98 intakes are identical except for some brackets for the PS pump, so it is an upgrade for all ZJs 93-98. I used that post as the base of this write-up
Nevermind them I thought there was a OBDI/OBDII difference in the engine's response to it that accounted for some people saying its awesome and others saying they lost power.
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Unread 01-23-2013, 04:11 PM   #45
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Cam profile changed in '96
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