Whacky idea !! Will this work ??
05-08-17, 09:20 AM
#1
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Whacky idea !! Will this work ??
Nuub here, so this may be alll wrong. 13b bridgeport/Holley 670 TA. So I think I need to run my 1" carb spacer in full plenum mode so I can get fuel to all four ports hopefully resulting in better throttle response. However, if I run the spacer in rail mode i think i would get twice the vacuum and easier starting via 50% less airspace to move(same vacuum pulling on 2 rails instead of 4). How can I get the benefits of both setups? Whacky idea: Could I install a 4bbl butterfly plate from another carb between the adapter and manifold, completely remove the primary valve plates , connect the secondary butterfly valve plates to a mechanical choke type cable. By opening or closing here , hopefully simulating either full plenum or half plenum configuration ? Whacky the right word?? Did i mention nuub here. Go easy on me plz.
05-08-17, 09:39 PM
#2
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When you go to a plenum, you need to completely recalibrate the carb. BTDT.
And high overlap rotaries do not run well at all with a plenum. Also BTDT.
The best bet is ITBs that are sized large enough to not be a restriction and call it done.
Plenums hurt, not help, throttle response, since the vacuum signal gets damped out so much.
And high overlap rotaries do not run well at all with a plenum. Also BTDT.
The best bet is ITBs that are sized large enough to not be a restriction and call it done.
Plenums hurt, not help, throttle response, since the vacuum signal gets damped out so much.