newer models slower? - Pirate4x4.Com : 4x4 and Off-Road Forum

pbnationrc · 12-05-2007, 02:30 PM

I test drove a 97 and a 98 jeep cherokee. They both had the 4.0L H.O. But for some reason the 97 was a lot faster. They both had about the same amount of miles on them. Was there a change in the engine or tranny between those years that would cause a loss of power?

95steel · 12-05-2007, 02:38 PM

Flame suit on....

I have always thought 91-95's were much faster than the newer ones. 98-99 they changed the head, power supposedly stayed the same... on paper.

Could also be gearing. 3.73-3.55-3.07 etc...

terryd · 12-05-2007, 04:11 PM

according to what i've read, the 91-96 head is the one everyone wants for HP. I also read that the later model 97-02 head creates more torque (and chryslers published numbers agree with that) and is more desireable when building a vehicle for offroad use.

DansGreyMj · 12-05-2007, 05:24 PM

idk, but my 87 mj 4.0 renix seems a hell of a lot faster than my cousins 04 tj 4.0

CartsXJ · 12-06-2007, 06:02 AM

The head switch over was in late 99, about the same time they put the larger intake manifold on them. It could have something to do with the spark plugs, air filter, etc. Its the little things that make performance happen, specially on a stock 4.0L.

COVEJEEPSXJ · 12-06-2007, 06:04 AM

Is this the street racer section of PBB?

xjemily · 12-06-2007, 06:09 AM

tap-dancing christ,kyle!

Yota Tony · 12-06-2007, 07:06 AM

Quote:

Originally Posted by COVEJEEPSXJ

Is this the street racer section of PBB?

Apparently.
I've never ever in my life found a Jeep to be even remotely quick.

vetteboy79 · 12-06-2007, 07:12 AM

It must have been a Police Interceptor edition.

12-05-2007, 02:30 PM	#1 (permalink)
pbnationrc Registered User Join Date: Dec 2007 Member # 104089 Posts: 2	newer models slower? I test drove a 97 and a 98 jeep cherokee. They both had the 4.0L H.O. But for some reason the 97 was a lot faster. They both had about the same amount of miles on them. Was there a change in the engine or tranny between those years that would cause a loss of power?

12-05-2007, 02:38 PM	#2 (permalink)
95steel Rock God Join Date: Oct 2002 Member # 14509 Location: North West Arkansas Posts: 1,547	Flame suit on.... I have always thought 91-95's were much faster than the newer ones. 98-99 they changed the head, power supposedly stayed the same... on paper. Could also be gearing. 3.73-3.55-3.07 etc... Last edited by 95steel; 12-05-2007 at 02:39 PM. Reason: speeling

12-05-2007, 04:11 PM	#3 (permalink)
terryd Registered User Join Date: Jul 2006 Member # 76997 Location: Covington, Va Posts: 325	according to what i've read, the 91-96 head is the one everyone wants for HP. I also read that the later model 97-02 head creates more torque (and chryslers published numbers agree with that) and is more desireable when building a vehicle for offroad use. __________________ 98 XJ 84 K5

12-06-2007, 06:02 AM	#5 (permalink)
CartsXJ Granite Guru Join Date: Nov 2003 Member # 24709 Location: Glenville, NY Posts: 599	The head switch over was in late 99, about the same time they put the larger intake manifold on them. It could have something to do with the spark plugs, air filter, etc. Its the little things that make performance happen, specially on a stock 4.0L. __________________ "Being a man take years of fightin, screwin, drinkin, and whorin. Then more drinkin and then more whorin...if there's time" -Trippin the Rift

12-06-2007, 06:04 AM	#6 (permalink)
COVEJEEPSXJ Registered User Join Date: Sep 2004 Member # 36128 Location: PA Posts: 968	Is this the street racer section of PBB? __________________ [B][I]"132 and Bush I've got him at gun point, OK gun point, 132 and bush, cover is code 3"[/I][/B] [QUOTE=87manche;10827893]just color it in with a sharpie. [/QUOTE]

12-05-2007, 05:24 PM	#4 (permalink)
DansGreyMj Registered User Join Date: Apr 2006 Member # 70783 Location: Clarksville tn Posts: 85	idk, but my 87 mj 4.0 renix seems a hell of a lot faster than my cousins 04 tj 4.0

12-06-2007, 06:09 AM	#7 (permalink)
xjemily Registered User Join Date: Oct 2007 Member # 101942 Location: Between the Hedges..... Posts: 1,287	tap-dancing christ,kyle!

12-06-2007, 07:12 AM	#9 (permalink)
vetteboy79 Pigs Fly Join Date: Jun 2004 Member # 31621 Location: Morganville, NJ Posts: 5,717	It must have been a Police Interceptor edition. __________________ '94 XJ RIP, time to move on New East Coast TTB racer in the works, trimmin' the fat... Flying Pig Racing #512

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