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Re: Problem with pressure drop test...Need help!!! Posted by Kevin K [Email] (#374) [Profile/Gallery] (more from Kevin K) on Wed, 15 Nov 2000 11:31:54 In Reply to: Problem with pressure drop test...Need help!!!, Jeff Cunningham, Wed, 15 Nov 2000 10:28:12 Members do not see ads below this line. - Help Keep This Site Online - Signup |
I measured 1.44 psi drop across the stock OG IC, with differential gage, at about 150 hp. It required installing flush pressure taps in same bore ducts, bef and aft the IC, in strait runs. Not easy.
I suggest a much easier method. Disconnect the apc control, and use a simple bleed valve to regulate boost before the IC at a 'knock proof' level for you that can be held to red line ... say 12 psi. Then use an accurate test gage to measure manifold pressure. You will not get absolute pressure drop, but any reduction in pressure drop with the abbott unit.
For the bleed, just unplug the sol-valve connector, add ~ 1/4 inch tee in the line to the wg actuator. On the xtra leg, add a 'home depot' brass needle valve to vent the pressure. Start closed (basic boost) and slowly open. The required restricting orifice is already in the sol-valve feed nipple.
Ideal test would be 4th gear pulls up long hill, hitting about 5500 rpm (safely w/o ticket). Mabe also check pressure into sol-valve for consistency with both IC's, not for actual drop calculation.
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