Ron Hyslop
NAXJA Forum User
- Location
- Madison, WI
Off hand, anybody know the RPM at which the renix 4.0 engine achieves max torque?
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Renix torgue curve
- Thread starter Ron Hyslop
- Start date
8Mud
NAXJA Forum User
- Location
- Central Germany
This is one list, though the accuracy is questionable, it is likely pretty close.
Output:
1987-90: 177 hp (132 kW; 179 PS) at 4500 rpm and 224 lb·ft (304 N·m) at 2500 rpm
1991-95: 190 hp (142 kW; 193 PS) at 4750 rpm and 225 lb·ft (305 N·m) at 4000 rpm
1996-01: 190 hp (142 kW; 193 PS) at 4600 rpm and 225 lb·ft (305 N·m) at 3000 rpm
2001-06: 190 hp (142 kW; 193 PS) at 4600 rpm and 235 lb·ft (319 N·m) at 3200 rpm
My butt dyno says my Renix (88) hits peak torque between 2200-2400 RPM and my 96 about 400 RPM higher.
Funny, stop light to stop light my HO will beat my Renix in a quarter mile, but there are places/stretches in that quarter mile my Renix will win. Different cams and/or computer program. If I'm driving the Renix and manual shifting, I'll win most every time against my 96, not by much, maybe 1/3 Jeep length. My 88 has a couple of inches more tire than my 96 has, torque tire combo just works well.
My 88 has a few more horses than my 87 did, minor but noticeable. Some kind of minor tweak between 87 and 88, again just my butt dyno.
Google "Dr.Dyno Jeep Cherokee", some good reading.
Output:
1987-90: 177 hp (132 kW; 179 PS) at 4500 rpm and 224 lb·ft (304 N·m) at 2500 rpm
1991-95: 190 hp (142 kW; 193 PS) at 4750 rpm and 225 lb·ft (305 N·m) at 4000 rpm
1996-01: 190 hp (142 kW; 193 PS) at 4600 rpm and 225 lb·ft (305 N·m) at 3000 rpm
2001-06: 190 hp (142 kW; 193 PS) at 4600 rpm and 235 lb·ft (319 N·m) at 3200 rpm
My butt dyno says my Renix (88) hits peak torque between 2200-2400 RPM and my 96 about 400 RPM higher.
Funny, stop light to stop light my HO will beat my Renix in a quarter mile, but there are places/stretches in that quarter mile my Renix will win. Different cams and/or computer program. If I'm driving the Renix and manual shifting, I'll win most every time against my 96, not by much, maybe 1/3 Jeep length. My 88 has a couple of inches more tire than my 96 has, torque tire combo just works well.
My 88 has a few more horses than my 87 did, minor but noticeable. Some kind of minor tweak between 87 and 88, again just my butt dyno.
Google "Dr.Dyno Jeep Cherokee", some good reading.
Ron Hyslop
NAXJA Forum User
- Location
- Madison, WI
Thanks, trying to figure out what size tires will work to get best fuel economy with my new 4.10 gears. Randy's Ring and Pinion book on differentials claims best fuel economy occurs at 30% below max torgue.
- Location
- WA state
IF you have any lift 31's should fit, maybe minor rub on turns. If zero lift/possibly sagged. I recommend no greater than 30" tires.
Ron Hyslop
NAXJA Forum User
- Location
- Madison, WI
I have an OME kit.
8Mud
NAXJA Forum User
- Location
- Central Germany
There are sweet spots. I usually cruise at a round 2200 RPM with 30 inch tires, but the speed limits are higher here.
8Mud
NAXJA Forum User
- Location
- Central Germany
cruiser54
NAXJA Forum User
- Location
- Prescott, Az
Interesting on the torque specs.
Actually though, the 87s were 177 HP, 88 was 182, and 89 and 90 were 190. All different only because of the ECU.
- Location
- Roanoke VA
I'm running 4.10's on my 90 with 30" tires. What I really like is with the tranny switch in "comfort", it will hold OD down to 35mph on slight grade and 25 on flat ground and will go into 3rd gear lock-up at about 30mph on flat ground. My engine is freshly rebuilt so its a strong runner, the torque is awesome! I get 16 in town/23 highway and that is with a corrected speedo.
I own 2 RENIX and 4 HO's. I'll take a RENIX and its low torque curve over the HO any day.
I own 2 RENIX and 4 HO's. I'll take a RENIX and its low torque curve over the HO any day.
