View Full Version : overhaul 1147cc

06-27-2005, 10:12 PM
A few weeks ago I posted the question.
I am rebuilding a '65 1147cc Spitfire. I have had it bored .20 over. I have installed a new mild camshaft, 415 lift intake, 410 lift exaust, and have advanced the crankshaft to 112 degrees ATDC, as advised by the manc.

The org. engine is a ( HE ) high comp. 9:1 Comp. ratio.
The pistons I used are HP 9:1 flat top.

Can someone out there tell me what cc/cuic.inch I'm looking at, and what HP I can expect?

Thanks Carl

06-28-2005, 03:55 PM
If you didn't do anything to make the stroke longer you're only going to make about 2cc difrence by the bore change.

06-28-2005, 10:09 PM
I'd say Bills about right on your overall displacement increase. As for your power output, I'd say you might be getting about 72 HP. Thats really kind of hard to say without actually knowing anything about the engine build.