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Why a tri-power.
Looks good but robs power.
Likely loose 30-40 hp over a single 4 bbl.
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??? - the guy who help me build my truck has built tri-power setups for racing vintage racers for decades. Every built motor for the racers was run on a dyno. The base was with a 4bbl and then run with the tri-power to verify the gains.They were always modest gains of 10-20hp, not a huge increase, but definitely not the huge power loses you are claiming.
Check it out with Ron Kellogg of
http://www.chevytripower.com/index.shtml. Ron is an icon in the Midwest and the early NHRA. His counterpart and friend(s) are John and Mike at
http://www.pontiactripower.com/. These both do Rochester setups.
Yes, it has the cool old school look (that I like), decent grunt, is very reliable and generates a lot of fun conversations at meets. If I wanted huge, reliable power, I would have gone with a LS and FI.