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Re: G9 FPR Posted by 900 Aero [Email] ![]() ![]() In Reply to: G9 FPR, Jeff Cullen, Sat, 19 Mar 2011 17:32:50 Members do not see ads below this line. - Help Keep This Site Online - Signup |
Hi Jeff, this photo shows the RRFPR I built for my '88 9000 Talladega;
http://www.saabnet.com/tsn/members/gallery.html?memberID=425&do=show&id=15911
It's configured a little differently to fit a 9000 but the fittings are the same. The fitting with a little screw is a needle valve that adjusts the rise in rate, same as Corky Bell's. The square fitting below it threads into the vent hole that keeps the additional diaphragm from interfering with the original one. This was just a hole on the original RRFPR's but I added the little square 90 degree fitting and a hose that hangs down a little ways to keep moisture from getting into that port. The hose from the needle valve should have one of Corky's black and white one way valves on it's other end for when the needle valve is adjusted in an open position there isn't a vacuum leak during idle conditions, it bleeds pressure off under boost which kills some of the rise in rate. The other port is of course where you run your manifold pressure hose same as the original regulator. Turbocon86 came up with a nifty little brass one way valve that screws into the side of the needle valve so my latest version doesn't use the bulky black and white one way valve! Start out with the needle valve closed and then if you're running rich in the higher boost levels open it a little at a time until your air fuel ratio is correct. If this valve is all the way open the additional rise in rate is pretty much gone but I've never had to open one that far. You can add a liquid filled fuel pressure gauge at the firewall end of your fuel rail by drilling a taping the banjo bolt 1/8" pipe for a 90 degree street L so you can adjust your base fuel pressure on the fly. My 9000 Talladega engine photos show my liquid filled fuel pressure regulator that's of course in a different place in a 9000 application. I have instructions for these latest fully adjustable RRFPR's if you need them. Take care, Dave
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