Originally posted by hobbsy
I, would follow the instructions since that is the only guideline you have. Ed did not design or engineer your engine.
Dave,
Apparently you haven't been around Pylon Racing or know much about engine performance. The reasons Ed recommended the way he said was because it apply exactly as how the engine was intended to be run/use.
As adrian was saying.... He purchased the OS 32 SX w/tuned pipe. If he intended to run the engine as equiped, he needs to break-in the engine accordingly. Just like what Ed was recommending per his written notes.
Yes. The manufacture recommended with stock exhaust, but what will the stock do if it was intended to run differently. The manufacture will usually recommended with the safe feature in mind due the fact that most Sport flyers doesn't have a lot of exeperience with engine tuning. Therefore, they make sure the recommendation is an easy one for Sport flyers to do.
But to make judgement about Ed's not an Engineer or Designer would be putting down someone who have tons more experienced than yourself would be of ignorant. To get all this straighten, I've put a link to Engine Break-in for your/others to reference by. Hope this will help others as well.
Engine Break-In
Go to "Tech Specs & Instructions" and click on a link FAG (Fequently Asked Questions) page and to Engine Break-In.
http://jettengineering.com/
Sam S.