1999 Jeep Wrangler XJ - The Insane Inline Update

1999 Jeep Wrangler Xj Hood Opened Front View

Test 1: Baseline with new cam & Banks Torque Tube
RPM	HP	TORQUE	AIR/FUEL RATIO
2,900	124	224	14.3:1
3,000	128	223	13.3:1
3,100	133	225	13.0
3,200	139	227	13.0:1
3,300	144	229	13.0:1
3,400	148	228	13.0:1
3,500	152	228	12.9:1
3,600	155	226	12.7:1
3,700	159	226	12.5:1
3,800	160	221	12.3
3,900	165	222	12.3:1
4,000	165	217	12.2:1
4,100	167	214	12.1
4,200	169	212	12.0
4,300	172	210	11.9:1
4,400	171	204	11.7
4,500	167	195	11.6
4,600	164	187	11.5:1
4,700	167	186	11.5
4,800	168	184	11.6
4,900	168	180	11.6
5,000	168	176	11.6
5,100	162	167	11.6

Test 2: Unichip dyno tune
RPM	HP	TORQUE	AIR/FUEL RATIO
2,900	127	230	14.0
3,000	132	231	13.5
3,100	136	231	13.1
3,200	142	232	13.1
3,300	147	235	13.2
3,400	151	233	13.2
3,500	156	234	13.3
3,600	158	231	13.3
3,700	162	230	13.3
3,800	167	231	13.2
3,900	168	226	13.2
4,000	172	226	13.1
4,100	175	225	13.1
4,200	178	222	13.0
4,300	179	218	13.0
4,400	180	215	13.0
4,500	180	210	13.0
4,600	180	205	13.0
4,700	183	204	13.0
4,800	184	202	13.1
4,900	184	198	13.1
5,000	180	189	13.0
5,100	177	183	13.0

Since dyno time is money and our stroker ran rich with the 24 lb/hr Accell injectors we originally installed, we had the company ship us some PN 150121 21 lb/hr injectors in case we couldn't thin out the mixture enough with the Unichip reprogrammer. It turns out our 24 lb/hr units were useable, but make sure you bring any components you may need along with you to the dyno.

The Unichip allows for nearly infinite adjustments to the air/fuel and timing maps of the factory computer. Compatible with both OBDI and OBDII systems, the Unichip can modify anything the vehicle's original ECU controlled, but unlike some aftermarket reprogrammers, it doesn't interfere with any stock ECU programming. It can run anything from transmission shift points to speedometer corrections.

We also ordered two extra 10-pound nitrous bottles from NOS because we weren't running a pressure gauge. The lower the tank pressure, the less performance you'll get out of a nitrous system. It's also a good idea to run a bottle heater to keep the nitrous inside between 75 and 85 degrees for the proper pressure. Check out our dyno numbers to see why.

TEST 3: NOS WITH BOTTLE AT AMBIENT TEMP
RPM	HP	TORQUE	AIR/FUEL RATIO
2,900	109	198	14.74
3,000	156	273	13.6
3,100	168	284	11.4
3,200	190	311	11.49
3,300	204	325	12.0
3,400	199	308	11.7
3,500	203	305	11.7
3,600	210	306	11.7
3,700	210	298	11.61
3,800	213	295	11.4
3,900	206	277	11.35
4,000	220	289	11.4
4,100	222	284	11.4
4,200	225	281	11.4
4,300	226	275	11.5
4,400	220	263	11.5
4,500	217	254	11.5
4,600	224	255	11.5
4,700	226	252	11.6
4,800	225	246	11.6
4,900	226	242	11.6
5,000	220	231	11.5
5,100	216	222	11.4

Test 4: NOS with warmed bottle
RPM	HP	TORQUE	AIR/FUEL RATIO
2,900	125	226	14.61
3,000	157	275	14.32
3,100	220	372	14.0
3,200	226	371	13.8
3,300	228	363	13.7
3,400	233	359	13.6
3,500	235	353	13.5
3,600	236	345	13.3
3,700	239	339	13.1
3,800	240	332	12.9
3,900	242	325	12.7
4,000	243	319	12.6
4,100	244	312	12.5
4,200	245	307	12.4
4,300	244	299	12.4
4,400	244	291	12.4
4,500	240	280	12.4
4,600	243	277	12.3
4,700	242	270	12.2
4,800	240	262	12.2
4,900	240	257	12.1
5,000	235	247	12.0
5,100	229	236	11.8

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