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woodduck

engine setback v height

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Hey guys, I took the big OMC off the stv euro and put on my 2.5 260. because it has a cut 15" mid I had to fit my allison set back plate to the L & S jack plate to clear the steering, hydraulics etc. I am running at 1/2 inch above pad with a total of 11 inches of set back (two plates) from the pod. How far above pad shpuld I be. At the moment I am chasing outright acceleration because the drag class they stuck me in ( I am in Australia) has a break out speed of 85mph. I ran the OMC with a 31" spinelli but with the MERC I have a merc ET, hoss triton, yamaha drag, all 24". They are off my allison so I presume they are Allison cut?.

Any suggestions I have not the time to do intensive back to back testing as I have to go and blow big blocks away very soon. Thanks

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Welcome...

That said I know of no one who runs 11" of setback on a Euro. With 5.5" of setback the prop will fall in the 3/4 to 1.5 inches above the pad. I'm sure others will offer what setup works for them too.

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