I was running a E-303 cam on my car when it was speed density and it seemed fine, although it did have a surge at idle of about 200 rpm not to big. some put a check valve in the map sensor and this seems to do the trick for a little bit. I went with mass air and it cost me a total of about $155.00 the new a9l comp from discount was 102.00 out the door including tax, and pro-m sells the adaptor that will alow you to still run your speed density harness with the mass air, and this costs $53.00. You could pick up a used stock mass air for pennys on the dollar. If this is something you are interested in call (24 541-4780 and ask to talk to FLETCH and he will help you, and if need be talk you through it. it took me about 30 min for the install hardest part is finiding the #60 pin. if you need help pm me.

 

i would leave the cam alone untill you've done at least heads intake and or headintake work........ from what i have seen read, the stock cam is actually a nice performance cam, and you can get alot of HP out of the motor with the stock cam...........


no need to run a huge cam unless you can get the extra air with it..........

 

OK, so the cam will stay stock. I appreciate everyone's input, especially Helmut's explanation of why I should postpone this modification. However, since it was brought up:
Although I am perfectly content with my 87 GT hatchback, I would / will be looking for a coupe when / if another car seems to be a better option. I plan on purchasing a new engine sometime soon as this old one needs to go. However, as I stand with the speed density currently still in place, would a swap from EFI to carb. be simpler than getting an engine and converting it to MAF? I have 176k on this car, and when I get the engine done, I am going to get a built one. Would it be better to just convert to MAF and get another EFI engine, or is it rather simple to go from speed density to carbed? (Or which one is a better option?) I have been wondering this for a while; Obviously there are advantages and disadvantages to both, just looking for some input on the matter. Like I said: new topic, but since it was mentioned, figured I'd take advantage of everyone's knowledge.

 

For me, it's simple. Parts - Mass air meter of your choice and bracket that bolts to strut tower. Air inlet or the cold air induction kits that all the kids use these days. Used or remanufactured EEC-IV. MAF harness connector cut out of another Ford vehicle (doesn't have to just be a Mustang). Some length of wire along with the harness. Cut out the main EEC connector to the computer from another Ford vehicle so you'll have pins with wire to spare. You'll remove the old EEC from the bracket. Seat the newer one in place. Add & move required pins around inside EEC main connector and solder wire ends together to the MAF harness and connect to MAF sensor. Connect main connector to EEC and disconnect the hose to MAP sensor on firewall. Cap off the hose that came off the MAP sensor and start the car.

A lot simpler than spending hours removing wiring in the engine bay and figuring out where the hot leads are for gauges, ignition, etc., etc. for a carburator conversion. You do the conversion that is best suited to you and/or your personal knowledge. Converting a speed density is easier for me and it's my opinion to stick with EFI if I were in your place because it's already there.

 

Thank you for taking the time to answer my q's with some detail. I consider myself pretty knowledgeable on cars, but on them in general. Just now am I actually strting to turn wrenches, so therefore I have questions. Wasn't sure how difficult the carb change would be, some people had done it and others hadn't, figured I would throw it out there. Again, thanks to those with input, and MAF will be in the near future...

 

I'll try to be there. As of now, I have nothing stopping me from going.