All of the dyno's I have read and seen have proven the 70's to actualy lose a little or break even to the 65's on anything not ported out the butt or blown/gassed. Personally I lost 3 lbs or torque, but gained 2 hp with the upgrade.........
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Dustin
89 Saleen GT Sport
Supercharged 306
Started her up 6/8/03
Old Motor
Supercharged 347
516 rwhp
553 rwtq
11.249@126.83
1997 Honda CBR 1100XX Super Blackbird
162 hp
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