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Old 07-27-2008, 09:08 AM
red65mustang red65mustang is offline
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are you tuning for better at the strip or better on the street atomization???

here's a good spacers explaination article....

and there is another good article in the Knowledge Base link at the top of the page.....

yes, your present 1/2" open spacer may well be adding a few more WOT peak HP ponies...."but".... at street rpms it is making the RPM dual plane intake behave as a open plenum design because there is no divider wall at the carb bottem...

on a intake stroke the piston is trying to pull a vacuum to make a strong carb Hg (good velocity for excellent atomization) signal from all 8 of the intake runners cubic inches of area due to no divider instead of just 4 runners worth of area....
(and worse it's 1/2 the carb signal at the carb because it is pulling from both primaries)

if your looking for better street driving performance I'd remove the 1/2" open spacer and test drive it....the "high rise" RPM intake already has a plenty tall carb base to plenum bottem distance...
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