carb intake test



Re: carb intake test

Postby grumpyvette » April 6th, 2015, 8:15 am

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I think your looking at a surge of liquid fuel flow from the booster entering the atomization process, as the vacuum increased rapidly usually as the power valves open fully and the carb changes or transitions from low vacuum to high flow circuits
REVERSION OCCURS, in all v8 engines but obviously the displacement, cam timing and compression effect the rpm range it tends to happen over.
basically at low speed the piston moving up the bore can and frequently does allow the intake pulse inertia to become reversed as the cylinder pressure partially excapes back into the intake port just before the intake valve fully seats.
http://www.hotrod.com/how-to/engine/140 ... ch-engine/

http://www.hotrod.com/how-to/engine/ctr ... reversion/

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they sell anti-reversion plates for carbs

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http://www.magnafuel.com/products/acces ... /index.htm
IF YOU CAN,T SMOKE THE TIRES AT WILL,FROM A 60 MPH ROLLING START YOUR ENGINE NEEDS MORE WORK!!"!
IF YOU CAN , YOU NEED BETTER TIRES AND YOUR SUSPENSION NEEDS MORE WORK!!
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Re: carb intake test

Postby Indycars » April 6th, 2015, 8:41 am


Watching again I noticed that it was at WOT and fully loaded such that it was
down to roughly 2000-2500 rpm. That seemed to be where he started his
other pulls on the dyno.

Rick
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