Quote:
Originally Posted by brianko
I'm working on baselining my newest toy, so I made a couple of dyno runs in the shop using the 87 octane that the vehicle came with from the dealer, and a subsequent tank of 93 octane. Fuses were pulled for 2 hours -- more than enough time to reset the parameters governing KR. Gains are about 20HP at peak, which is what would be expected when running 93 vs. 87. I did have to laugh at the spark tables GM came up with -- I think they handed this job off to a college intern. No evidence of smoothing, large holes in the map, etc. Explains a lot about the ugliness of the stock curves!
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This is a nice test. Good work and thank you for sharing.
But it's not just peak power that is being effected. I'd say the low range power is more important, and how it picks up through the band.
Would have been perfect if you'd have run a middle dyno with 93oct gas but before the fuse pull.