Jeep WJ Grand Cherokee Performance And Power Options

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Performance associated hyperlinks on this website online:

WJ Engine specifications / Elapsed Times

HO Engine specifications and features

FIPK (Fuel Injection Performance Kits)

Manifolds, standard and HO

Spark plug removal and installation

 

Performance features obtained with varied mods

As compiled by Dino Savva

 

4.0 I6 Engine

 

Factory energy scores
Horsepower	1993-1995: 190 @4750 rpm 1996-1998: 180 @4600 rpm 1999-2004: 195 @4600 rpm
Torque	1993-1995: 225 lb ft @3950 rpm 1996-1998: 220 lb ft @2400 rpm 1999-2004: 230 lb ft @3000 rpm

 

Item	Horsepower acquire	Torque acquire (ft.-lb.)
1. Okay&N FIPK	7
2. Bored 62mm TB	3
3. Bored 62mm TB spacer	2	3
4. Intake manifold heatshield	?
5. HP plugs	0-2
6. Splitfire plug wires	3	6
7. Dynomax Super Turbo cat-back exhaust	7	9
8. High-flow cat	2
9. Tri-Y header/S-pipe	10
10. JET Stage 2 PCM	8 (auto transmission)
11. Speedtweaks IAT adjuster	?
12. Electric fan conversion	3	3
13. Ported inventory cyl. head	11	4
14. Accurate Power huge valve head	16	7
15. Crane #753901 camshaft	10	15
16. Raise CR from 8.8 to 9.5:1	8
17. Accurate Power 4.6L stroker engine	75	105
18. Accurate Power supercharger	85	90
19. Nitrous Express equipment	50-75	90-135
With the exterior bolt-ons listed above (#’s 1-12), output needs to be about 225-230hp. Beyond that, inside engine mods or pressured induction are wanted (#’s 13-19).

4.7 V8 engine     Factory energy scores Horsepower 235 @4800 rpm Torque 295 lbft @3200 rpm
Mod	Horsepower acquire	Torque acquire (ft.-lb.)
1. Okay&N FIPK	5	6
2. Brian Stroud’s RamIT chilly air consumption	?
3. Kolak 3″ cat-back exhaust	5	6
4. Modified Y-pipe + 3″ high-flow cat	10hp
5. Mopar Performance PCM flash	9	8
or 6. ASE chip	6	26
or 7. Kenne-Bell Optimizer II	10	9
8. Flometrics 70mm TB	5	7
9. Relocate IAT sensor	?
10. KRC Performance HO camshafts & consumption manifold	19
11. Remove clutch fan + quick belt PS/alternator bypass	10	17
12. Duner’s gasoline rail cooling system	16	29
13. Kenne-Bell supercharger	99
14. Paxton Novi-1000 supercharger	102	62
15. Garrett T04B turbocharger 10psi increase	144
16. Nitrous Express equipment	50-150

 

4.7 HO V8 engine     Factory energy scores Horsepower 235 @5200 rpm Torque 325 lbft @3600 rpm
Mod	Horsepower acquire	Torque acquire (ft.-lb.)
1. Okay&N panel filter	3
2. Okay&N FIPK	7
3. Brian Stroud’s RamIT chilly air consumption	?
4. Kolak 3″ cat-back exhaust	?
5. Modified Y-pipe + 3″ high-flow cat	?
6. ASE chip	?