All,
I'm looking for some guidance selecting new valve springs and setting
valve
spring pressures on a 64 Spitfire used for vintage racing.
Engine
info:
1147 + .040, block and head shaved per comp manual, compression about
12:1
Cam = Kastner A7, .412 lift, duration 242 @ .050. stock rockers, tappets
2x SU HS2 carbs, large intake valves
Rev limiter set at 7200 RPM, shift at
6500-7000 RPM
British Parts Northwest provided the following specs on their
dual spring kits.
VS703K @1.340 Seat 70lbs, lift .412 175lbs
VS6624 @1.340
Seat 35lbs, lift .412 145lbs
I'm thinking the VS703K looks like a good
choice, and the VS6624 would be a bit
too light on seat pressure.
Thanks for
any insight.
Tim
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http://www.fot-racing.com
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