Dual carbs on a 40 horse

[dyno don]

 guys, long standing debate regarding manifold length performance...short manifolds/bottom end and more torque.... tall manifolds/mid range and top end.  This has been debated for years but experience speaks for itself. Tests were done YEARS ago. Seasoned Head porters will agree there is another 10 to 15 hp waiting from the middle to the top of the manifold. My experience as well as many others.  This is the main reason why the Berg 40/42/44 dcnf set up worked so well with astonishing throttle response and is also the case with short 48ida manifolds and fuel injection set ups.  peace out....

[red baron]

guys, long standing debate regarding manifold length performance...short manifolds/bottom end and more torque.... tall manifolds/mid range and top end. 

exactly the opposite is right. Here you go:

www.ms-motor-service.com/ximages/pg_pi_0037_en_web.pdf

[TexasTom]

This is fun to play around with:

http://www.wallaceracing.com/runnertorquecalc.php

[johnl]

Phil --- Nice ex car -- I'd forgot just how pretty that thing was

Danny -- on the 40 horse the shorter the tube between the carb and head the better -- (short tube torque, long tube RPM/HP) anything less than 8" would be perfect (most IDA manifolds are 6" but that was limit to carb height) -- hold the carbs on the side of the engine and find a happy spot where the Carb can set pretty and the linkage won't be to much of a bitch to make and fab from there. Since your making the tubes you can even move the carbs forward or back to meet your requirements. If you want to go crazy you can even do a cross ram manifold LOL

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Hey, I've owned a pair of these for 25 years !!!  Talk about poor fuel economy, you guys don't have a clue until you put your foot into one of these and suck all of the atmosphere out of Los Angeles.. 
  <a href="http://www.youtube.com/v/YLJVItmLPqM" target="_blank">http://www.youtube.com/v/YLJVItmLPqM</a>