Customer Car came in as OBD1 S52 with M50 manifold and a off the shelf Name brand chip for said setup i wont name. OBD2 headers and a cone on the MAF. Brought car to shop, threw OBD2 harness/ecu/sensors on it, changed nothing else and results are below
Did 3 runs, based my other comparisons off the middle of the 3.
Stock US Tune vs OBD1. Dip is from vanos shutting off early because of missing VSS...
OBD2 Base vs OBD2 tuned
OBD1 vs OBD2
Here is the revisions on the OBD2. Playing with vanos after flashing my Off the shelf tune and tweaking slightly (bringing timing down as far as possible without affecting power). Back to back to back runs other than the ~1.2 min flash time.
So basically ~10w/tq from going to OBD2 with no other changes. My off the shelf tune vs fine tuning it on dyno changed nearly nothing (other than fixing vanos bomb) as ive gotten the off the shelf tune pretty down after a while.
Again there is the obvious possibility that the OBD1 tune could have been revised further to make the same numbers but my point still stands. This will be more reliable, smoother overall, and when it does mess up, give you meaningful feedback as to whats going on.
Bring the fire! ;)
Did 3 runs, based my other comparisons off the middle of the 3.
Stock US Tune vs OBD1. Dip is from vanos shutting off early because of missing VSS...
OBD2 Base vs OBD2 tuned
OBD1 vs OBD2
Here is the revisions on the OBD2. Playing with vanos after flashing my Off the shelf tune and tweaking slightly (bringing timing down as far as possible without affecting power). Back to back to back runs other than the ~1.2 min flash time.
So basically ~10w/tq from going to OBD2 with no other changes. My off the shelf tune vs fine tuning it on dyno changed nearly nothing (other than fixing vanos bomb) as ive gotten the off the shelf tune pretty down after a while.
Again there is the obvious possibility that the OBD1 tune could have been revised further to make the same numbers but my point still stands. This will be more reliable, smoother overall, and when it does mess up, give you meaningful feedback as to whats going on.
Bring the fire! ;)
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