This one is probably a dumb question, but I was about to buy a 50 oz flexplate for my 86 roller engine drop in to c4 deal, and my buddy says he has a flexplate from an 89 aod mustang. Would this aod 50 oz flexplate work with the c4?? Also, I don't like how electric fuel pumps are so loud, so I want to install a mechanical pump into the 86 block. Does the 86 block still have a fuel pump eccentric in it??? what about the plate on the outside?? If it doesn't have either, can I re use the 72 eccentric and plate, or do I need one from a roller 85 engine?? Thanks again.
I would think you could reuse the 72 Fuel Pump Eccentric but you may need to use a longer pin in the end of the Cam Shaft to hold the ecentric in place ...
Nope, the AOD flexplate has 164 teeth and will not fit in the C4 bellhousing. The C4 flexplate has 157 teeth. Use the stock Maverick starter with the new C4 flexplate you got. There is no fuel pump eccentric on the 86 or the hole for the pump. There is a provision to bolt a mechanical pump on, but you must cut a hole in the cover for the pump shaft to go through. Once you take a look at the front cover you will see what I mean. I didn't want to go through all the hassles with the eccentric and such, so I went with an electric pump mounted next to the tank. It is a rotary vane type, so it is very quiet. Hope this helps. -Corbin
I haven't actually bought that flexplate yet, as I spent the money on that killer weiand intake, but the same guy always sells them for that price, so I guess I'll pick one up asap. Talk to me more about a "rotory vane" type external fuel pump. This is the first I have heard about it. My buddy has an external fuel pump bolted to the engine compartment of his 82 capri 302. Simply put, it sounds like someone is wacking on the side of the car with a sledge hammer. I need to cut costs down, though, where can I get this rotory vane, and what is the price range vs the typical external mechanical pump? I do like the sound better of the newer 5.0 starters. They are not compatible??? Not really a big deal I suppose.
I had a fuel pump that was very loud before as well and it drove me crazy. I finally found a quiet one from Summit that works very well and is super quiet - there is a VERY faint whirr noise from it that cannot be heard over practically anything. I also have it wired up to an oil pressure cutoff switch and an inertia switch in the trunk. This pump is for street cars and is self regulated at around 4-6lbs I believe - perfect for a street car like mine. It has never given me any problems and it works great. It keeps up with the engine too - it's never starved for fuel. It has an inline filter attached to it before the gas reaches the pump. The rotary vane is quieter because in essence it is basically a fan inside a cylinder which spins and moves the gas. The loud pumps you here are piston types where a piston moves back and forth inside to suck in gas and push it out - basically. For best results mount the pump as close to the tank as you can and withing a specific height above it - all these things are told in the directions. I got mine from Summit for $48.69 - it's $51.99 now. The part number is CRT-P60430. Hope this helps. -Corbin P.S. I am not 100% positive about the 5.0 starter, but it is my recollection that the gears are slightly different because of the different number of teeth on the flexplates. Some have said it doesn't matter because the difference is minute, but to be sure the gears mesh correctly and don't eventually wear down the teeth on the plate, I used the Mav one.
case closed. thanks Corbin. I'm not even messing around with the oem style setup then. Summit, here I come!!! I'm really getting excited!! I convinced a buddy of mine to help me drop in the 5.0 motor into the maverick within the next few weeks, in return I'm giving him a couple of sets of mustang seats and some ten hole wheels. YIPPEEEEEEEE
My 86 roller motor had the fuel pump excentric on the cam shaft. I am using a different front cover so I can mount a mechanical pump and have the dip stick up front for the front sump oil pump.
Where did you get the oil pressure cutoff switch and an inertia switch? I searched Jegs and Summit websights and couldnt find one.
I got my oil pressure switch from Jegs. It's part number 720-7872, and they call it a Fuel Pump Safety Switch. The power gets cut when the oil pressure drops below 15 lbs. It's $12.99. The inertia switch I got from a late 80s/early 90s Lincoln Mark IIV. Pretty much any other car's would work. It works great - I tested it out by rapping it with a screwdriver handle. I ran the wiring from the cutoff switch, through the firewall and an inline fuse, and ran it with the taillight harness to the back of the car. Inside the trunk I mounted the inertia switch to the vertical brace for the trunk hinges that goes down to the wheel wells. It's tucked up nicely, and even says Ford on it - cool! Then I ran the wiring to the pump from there. -Corbin
