e85 timing table.
#21
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You don't really need to buy a 4 port. Just replumb your 3 port like the pic above. As far as going down to zero, not sure why you'd need that. Anyway, plumbed this way I cracked my 22 psi boost cut the first couple times until I got the DC figured out. If you decide to replumb, start low and work your way up. Be sure to drill a relief hole in the line going to the done (.030 or so) so pressure doesn't get trapped in the dome.
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