Quote:
Originally Posted by WordMan
The good news is, I'm wrong. I read the info the guy put in the ad when I bought the car. It's a "50K mile 1990 engine, NOT a Jasper or other rebuild."
Doh!
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Quote:
Originally Posted by incoming
I've personally not had good luck with them. Received a service truck with a new jasper engine twenty five years ago. Lasted 5k mi. spun mains. Bought a Suburban with a 3k mile SBC and the lifters failed after 13k miles.
My FIA has a 351 and I personally put together my current engine after the third engine from them that failed. Granted, they were ran really hard. 9k miles and i built the fourth engine myself. When this one lets go, Its on me.
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Quote:
Originally Posted by bobcowan
Previous versions of twisted wedge cylinder heads required specific pistons to fit the non-stock valve angles. Be sure and check on the new versions.
53cc combustion chambers are kinda small, depending on the type of pistons you plan to use. Be sure and calculate static and dynamic compression.
Jasper is a pretty good rebuilder for stock replacement engines. Not so much for high performance stuff. Be sure and check deck height on ALL cylinders.
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Okay, I need to stop being cheap with the bottom end when I'm willing to spend the money on the top. Instead of using the short block in the car, I'll build a new short block.
I changed the specs in my OP, but here it is again:
Bottom end: .030 302,
Pistons: Trick Flow
Piston Head Volume: +2.00cc
Crankshaft: Steel, 3.00" stroke
Compression calculation with the deck clearance set to .006" is 10.63:1 with 53cc heads and 10.25 with 56cc heads (assuming a .060 head gasket).