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  1. R

    99 50hp Johnson compression

    Good morning, Im a diesel marine mechanic & considering buying a J50PLEEEA outboard for a boat im building for my nephew. It seemed to run ok on a stand. I did a compression test & the top cylinder was about 115 psi & bottom was slightly more than 105psi, is this acceptable? I also notice the...
  2. R

    Stroker engine build

    Happy New year everybody. Does anyone have any input about using 6" connecting rods on a sbc stroker build? Also possibly going to run an aluminum head under heavy torque loads? will be closed cooling system. Thanks for any input.
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    Vortec 906 & 062 valve stem o.d. ?

    Hello everybody, I am disassembling 2 sets of Vortec heads for inspection for my stroker build. One set of 906's & a pair of 062's. I am a little puzzled at the fact that the 906's have a valve stem o.d. of .332 & the 062's are .319. I thought the heads were supposed to be the same except for...
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