How to prepare for engine dyno?
This dyno session is simply for tuning , leak checking , break-in ( or breaking) and curiosity.
Seems like you have a secondary other objectives too.
I hope to try 2 manifolds back to back .... A Victor vs M1 Dual plane W2s.
That's fine. :thumbsup: Actually that actually makes it that much more worth it being on a dyno than break in stand.
Even before, or if you don't get to, changing intakes you want to be looking at the AFR and fuel/hr to see if the align and the fuel curve is flat through the pull.
(AFR is based on interpretion of left oxygen so that's why its never an absolute. That's why changing timing can sometimes appear to change the AFR. It changes the combustion process even though the fuel to air ratio was the same.)
IMO. be prepared to change jets and or main air bleeds. If you don't have changable air bleeds, bring some thin wires.
Keep in mind compression may come up through the pulls.
Some interesting reading from a very smart builder tuning a race engine that was supposedly broken in.
Motorsports Village • View topic - How a Wideband gets tricked to read wrong AFR
A few posts in, a member explains different ways he can load the dyno for different purposes.
2 different dynos,2 very different numbers.why?
