I paid $300 for 1/2 day on water brake dyno (Superflo dyno).
Every aspect of air/fuel ratio, exhaust gas temp, volumetric efficiency, BSFC, etc., is looked at and adjusted as necessary. This is the second car I have done this way, and will do this as long as this guy is available.
My personal opinion is $720 is too much for water brake deal out of the car, unless you get a full day. The only way you would need a full day is if you were experimenting with intake manifolds, carbs, headers, etc. Just to dial in a carb and the timing shouldn't take that long (we did it in about 7 or 8 good "pulls") Therefore it would be WAY too much (in my opinion) for rear-wheel set up, because set up time is much less on the rear-wheel deal.
My engine builder charged me $450 for whatever it took on a Superflo (engine) dyno. That included a full break in routine and 16 pulls to get the engine dialed in. Well worth it in my opinion, but $720 does sound expensive to me.
I went to Bruce's Speed Shop in Rockaway, NJ. Paid 75.00 for three pulls. Took the sheets and faxed to BG (Demon carbs) and, after their recommendations, went back the following week for another three pulls. Picked up about 40hp.
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