OK im halfway thru installing a powerdyne bd11a supercharger and my car has underdrive pullies. Where can I buy a set of stock pulleys? It should be pushing 11# of boost. Should I change spark plugs?
Its always a good idea to get new spark plugs put in after you intstall a blower. I just go with the autolites one step cooler than stock and the gap set in the mid .030's.
You can find a set of stock pullies everywhere lol. Ebay, JY's, maybe even www.50resto.com (i havent checked that though)
Come on man, its not that hard. All you had to do was follow the link I gave you before and click around. But, i guess I gotta go one more step for ya LOL
you will probrably want to stay with autolite 24's gapped to around .032. Stock plugs are 25's at .054. I was told that the 23's may be to cold for light load conditions on the motor. Ex. low rpm driving and cruising. // go with a 70mm TB and if you are actually going to run the 11lb. pulley make sure you keep your rpms below 5800. The maximum repeatable rpm's of the blower bearings are about 36,000 rpms. There's a place called 928 motorsports and speacialize in modifiyng powerdynes for V8 porsche 928's. Goto 928Motorsports.com and they have all the info you need on the limits of powerdynes and how to improve them.
I went to the ford garage and got the motorcat plugs 1 heat range cooler than stock. Should work. Another couple questions. I have 42# injectors and a 255lph fuel pump. do I need the FMU that came in the kit?
most deffinately do not use the FMU with the 42lb. inj. Most people go with 42's so they dont have to use an FMU. go to a tuner and have them adjust the duty cycle to meet the needs of your set up. With 6lbs of boost or less you can get away with not having a by-pass valve, but with more than that you will need one. I gto an OEM bosch bypass from profiecient performance on the net. Its good for up to 12 lbs of boost. In your case you might just want to go with a blow off valve. The valve will go on your inlet tube not your TB.