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#1
06-11-2014, 06:38 PM
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Story of 2 dyno's
since it's quiet here. I was recently discussing an engine I did for a customer. the stocker to beat in his club was on a dyno and produced 29 hp and 41 ft lbs of torque. When I completed their stocker motor it was 25hp and 39 ft lbs of torque. I look at torque and how wide the torque is more than HP. I figured they had to be close. I told them that we will have to see how it looks on the track to get an idea how the 2 motors compare since I can't seam to believe the other dyno numbers. anyway they had their first pull. it won by 18 ft on its maiden voyage. so now a couple more events to see what it needs for gearing and a gear set will be in order so they at least have a couple choice's rather than 1 . The moral to this story is don't be intimidated by what you have unless you're getting your butt kicked.
By the way. I used a ZK3 cam in it with some jeep lifters I had. worked very well. I would recommend it to anyone building a stocker. 
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#3
06-11-2014, 09:08 PM
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you do correction factors to take weather conditions out of the equation, if you have a way or program to do the loading at a set speed every time that takes the operator out.
you do need the same dyno as that seams to vary.
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#4
06-12-2014, 09:49 PM
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The Dynos WILL vary by a few percentage points.
About 40 years back when I worked at the local IH dealer, they got a new Dyno. Hooked it up to a new 1466, got the readings, then hooked up the old Dyno to same tractor. As I sort of seem to very vaguely recall, there was a 9 HP difference between the Dynos. 
__________________
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