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RX-7 2nd Gen Specific (1986-92) RX-7 1986-92 Discussion including performance modifications and technical support sections.

 
 
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Take your pathetic ultimatums and stupid "AOL" comments and shove them straight up your ass, you little punk. You avatar is gay as well....
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\r\n1990 Vert/ S5-JDM 13BT (rebuilt but with issues I\'m working out). Rtek N370 1.7, 550/800 injectors, FD fuel pump, RB REV TII exhaust, Tein springs and Illuminas\r\n
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Take your pathetic ultimatums and stupid "AOL" comments and shove them straight up your ass, you little punk. You avatar is gay as well....
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\r\n1990 Vert/ S5-JDM 13BT (rebuilt but with issues I\'m working out). Rtek N370 1.7, 550/800 injectors, FD fuel pump, RB REV TII exhaust, Tein springs and Illuminas\r\n
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Take your pathetic ultimatums and stupid "AOL" comments and shove them straight up your ass, you little punk. You avatar is gay as well....
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\r\n1990 Vert/ S5-JDM 13BT (rebuilt but with issues I\'m working out). Rtek N370 1.7, 550/800 injectors, FD fuel pump, RB REV TII exhaust, Tein springs and Illuminas\r\n
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Old 09-27-2011, 05:39 PM   #11
Pete_89T2
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Yup, these check valves don't really restrict airflow all that much in the "open" direction, and they completely block airflow in the "closed" direction. That's not what you want for plumbing the MAP pressure sensor or a boost gauge - what you want is a restriction in the airflow, which has the effect of dampening the transient pressure spikes your MAP sensor or boost gauge would see.

The restrictor pill is a little plastic thingy with a tiny hole thru it that fits inside the vacuum hose. Most of us loose these when replacing old worn out vacuum hoses. You can fabricate one pretty easily as follows:

1. Get a straight-thru style vacuum hose coupler.
2. Fill the inside of the coupler with some epoxy putty or JB weld.
3. Before epoxy fully hardens, run a pin through it to create your restrictive path for airflow.
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