92Raiderburban
OBS Enthusiast
- Joined
- Sep 28, 2014
- Messages
- 60
- Reaction score
- 37
I have a squarebody suburban that I swapped a '95 cluster + VSSB into. I have a '93 4L80 (toggle switch manual shift) behind its current carbed powerplant. This is the connections: Cluster plug ----> VSSB ----> 4L80 output sensor. There is no TCM/ECM/etc. I have the tall, factory rare 3.21s out back with 295/75/16 tires (33.42 roughly) front is factory 265s. I use the calculator on tbi chips.com and the input ratio i got was 0.605xxxx, closest to to the chart setting 0.604xxxx, I calibrated the jumpers on the VSSB and it reads 5 MPH slower. i compared with my GPS phone app. I tried these jumper settings also but no luck to get it right:
0.591xxxx - 7-8 mph slower
0.598xxxx - 5 mph slower
0.611xxx - 0-20 dead on, at 25 mph read 5 mph slower
0.618xxx - read 7 mph too fast
What could be the culprit? What could i do to get it reading correct??
0.591xxxx - 7-8 mph slower
0.598xxxx - 5 mph slower
0.611xxx - 0-20 dead on, at 25 mph read 5 mph slower
0.618xxx - read 7 mph too fast
What could be the culprit? What could i do to get it reading correct??
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