In a recent email to our group I read there was a set of NPR's for sale, I believe $500. Some rings were missing. I know that the NPR's have a very good reputation but I need some more input regarding the differences between the NPR's and say JE or Shasta pistons with Mahle cylinders. There's something about offset piston pins etc. What is the best combination for a 125hp to 135hp 912 or "C" motor. I know that the power comes from a combination of compression, engine size, cam, carbs, heads and exhaust. So far I've got Carrillo rods, scat crank, JE pistons, Mahle cylinders, Elgin cam and head work to match by their recomendation, sport exhaust, etc. At 125-135 HP how much am I taking away from the overall life expectancy of the motor?Any suggestions on a good power combination?bela_________________________________________________________________Get your FREE download of MSN Explorer at http://explorer.msn.com
Bela, Your JE pistons are the best choice here because they are a good forgedpiston and up to the task. I don't know what type of piston it is but youare going to need to get to 9.5-10:1. What type of Elgin cam is it? If youdo not know the specs give me the Elgin model number. eg 6508. 125-135 is alot of power for a 356 motor. You are pushing the limits of a drivableengine. Life will depend on quality of build and would strongly suggest youput on a full flow oil filter and an external cooler. Your stock cooler isnot up to the task. There are a few other mods that can help the life of themotor.Sincerely,Alan,The Stable, San Francisco
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