My 521 BBF FAST EZ EFI 2.0 Swap
Well guys, Christmas came early! EFI was on backorder but Summit got mine to me 5 days after it was said to come in… woohoo!!
Anyway here are some pics and things being converted. This is going in my 521 BBF powered 1987 firebird which has just recently gone through a 2004R Overdrive transmission swap with lockup.
Original motor was a 10.8:1 521 BBF, eagle cast crank, eagle Hbeams, Mahle Forged flattops and I gapped the rings for small NOS/boost. Combined with OTB eddy 95cc heads, lunati 61605 cam 241/249, .582/.6" lift, Eddy torquer II port matched intake, Scorpoion 1.73 roller rockers, Jomar Stud girdle, 3/8" Trickflow moly 1 piece pushrods.
Fuel system was a aeromotive 150GPH 18-20psi pump, sumped stock tank, -10 with 100 micron pre filter to pump, -10 pressure line to aeromotive bypass regulator, and -8 fuel log setup to carb, regulator used a -10 return back to the tank. Motor was CARBED with a prosystems 1000cfm Full billet carb and lokar throttle/kickdown cables. NOS system is a 250hp plate kit, 10lb bottle, using a cheapo 110GPH carb fuel pump, and -6 line to a 40 micron filter before deadhead regulator.
Ignition was a stock replacement duraspark (personally recurved with spring kit), MSD Cap adapt. Summit 8.5mm 50ohm custom spiral core wires, and a mallory promaster coil. Ignition controlled by a Mallory 685 CD box with NOS activation, High speed retard, Start retard 10* and rev limiters etc.
521 BBF 10.8:1 FAST EZ EFI 2.0
2004R GM OD Trans swap, NX NOS kit
Last edited by customblackbird; 04-18-2014 at 11:29 PM.