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Senior Member
Mild pump gas 454 build and dyno test.
There was quite a bit of indecision by the owner on this build, to say the least. I tried to educate him as best I could as to the differences in size, power and cost, and after discussing 468 flat tappet, vs 496 and then roller cam options, he decided he wanted to go with the flat tappet 468. I had a nice rotating assembly with 7416 forged GM crank, GM rods and Arias forged pistons, along with some nice 990 heads. This engine is to go in an 18' jetboat, and the customer lives in Utah and runs at altitude. As it came closer to time to assemble his engine, there was talk about moving to the river, and I had 2nd thoughts about the compression ratio the domed Arias pistons would provide with the 990 iron heads, so made the decision to purchase new KB Icon forged pistons that would yield 9.6-1 compression that I deemed safe and appropriate for a pump gas iron headed engine. It was sometime later, after that assembly had come back from balance that he decided that it would be more fun to have a solid roller cam, and to dyno the engine, which meant he would like some bragging rights....hmm so now we have a mild compression engine that we were going to run a dual plane aluminum intake and single carb, hmm might have to give that some thought.
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