Thread: Setup sounds ok? 306 from carb to fuelie

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Hello everyone. I have a 1986 Mustang lx trunk i bought last summer as a street car/drag racer. The MOTOR is a 302 done to a 306, E7 heads done 202 and 160, E303 camshaft, crane scorpion 1.6 roller rockers, ARP stud/bolt kit, MSD 6al ignition with adj rev limiter. It has a Weiand Double plane intake and a edelbrock 750 carb on it. It has 3.73 gears in the back and its 5 spd with a ford stage 2 clutch and a good quadrant.
I have removed the intake to begin my fuel injection swap and strated ordering some parts. My engine is an older 302, because the fuel pump is still attached to the block, even though it has an electric pump as well.
To make the swap happen I have:
Stock 5.0L H.O GT upper/lower intake setup, incl harness and computer
Now I have ordered:
1.Fuel injector rails/line/fitting/regulator kit
2.24lb injectors - computer is calibrated for 19lb???
3.70mm MAF sensor - supposed to make it work with big injectors, from stock 55mm
4.70mm throttle body polished
5.aluminum rad 3xcore and electric fans
6.manual steering rack
7.rear upper/lower control arms, urethane greasable bushings
8.frame connectors

My two questions are Is this setup going to work to even start the car? I know computer calibration and injector pulse/resistance are probably going to dislike it. Some say that with a bigger MAF, the more air, the maf metering how much fuel should flow in. If it allows more air, it'll add more gas.
The other question is I am aiming for 12s in the quarter mile. You guys think I can make this thing see 12s? Carbureted it ran 13.02s, and I started letting off because the steering was trying to throw me into the wall.
Any input is appreciated. The vehicle has not seen a dyno since I have owned it. All the chassis parts I'm putting on are because of wheel hop and body twist.

Several things to watch for: the cam for a injected engine usually has an overlap dimension that should be maintained. Depending upon your ECM, it may be a bit different than a carbureted car. For instance, my 350 injected chevy (MSD throttle body and MEFI2 controller likes 112 deg overlap. Call your ECM tuner and discuss before buying a cam. Since you say you are using the stock ECM, I will predict you will NOT run better than the carb setup with a stock ECM program. There are people who can modify the program (late model computers do NOT have a "chip" for better performance) Compare the price to hack the stock EEC Ford unit vs using a FAST brand or other controller. Dont fall for the "self learning" controllers, they are for mild street use..... The fuel pressure needs to be in the range for the system.....a mechanical pump will not cut it.

Thing is, motor is already done. The cam is in, everything is on and done. I ran a 750 carburator with a weiand double plane intake and the vehicle stunk like improper combustion. There is NO WAY a 306 with mild mods would need that much fuel. Ppl have ran 650 on these and though they were a bit too much. It also already has an electric fuel pump, as i wrote down there somewhere. Read the whole story. Its a holley blue(electric), goes to 120psi. Guys, pls read before posting. I just reexplained what i had already explained)

Doubt the stock intake, without some extensive extrude hone time, is going to be up to the task. Friend of mine tried a similar setup using the stock ECM, it ran but the computer never seemed to be able to be able to keep up with the cam.

Also probably going to need a good regulator with a return port and a return line to the tank.

Anyway, can you get the car to run? Probably. Will it go into the 12's? Doubt it, for sure not with the stock ECM, it's not going to be able to handle the rest of the mods. Especially bigger cam and porting work seem to get "out of range" for the computer to adjust fuel and spark curves to.

Hmm, ok. I'll give that a thought. But what kinda computer would I run, or do I have to get a chip burned, buy a tuner if it exists?? I am kinda runnign out of $$, a new intake is like 500 bucks, and I already dumped like 2k in it. All the Parts haven't showed up yet, and its still raining, so i can't do anything. I pulled out my mechanical fuel pump yesterday, and I was wondering, do I have to remove anything from inside the motor, or can I just block it off? I heard there is an excentric under the timing cover, but do I take it out or leave it alone? thanks

The ecentric is fine, it's attached to the end of the camshaft and won't hurt a thing. Robot told you that many of the ECM's do not have a chip that can be redone.... As far as what to run for a computer, not sure but there are some options and none of them will be cheap. FAST has good electronics, might be somebody around who can redo your existing computer. Could also check with Ford and see what they have available or what they might recomend. Takes a bunch of money to mess with all the electronic goodies, if you're running out of cash might want to just run it with the carb for now while you're saving up some $$$$ and researching an electronics package that will work with your engine. OEM computers are quite limited on what cams, injectors, and timing programs they can handle.

Research is going to be the key! Might take some time to find the right guy and or the right ECM that will work for you.

So you are saying an E303 cam and a Heads done, would screw up spark timing? But I have MSD ignition!!! Its a 6al box with an adjustable rev limiter(4500-6800rpm).Thanks

Don't know... Have to talk with someone who knows the ECM and it's programming. Not everything is going to be compatible with a stock ECM. About all the MSD does is give you a multiple spark below 3,000 RPM. The timing curve is still controlled by the ECM.....