slowfox

I need some help I have a 1987 GT. I need to no if its ture that u have to convert them to mass air befor you can do any mods. thanks for the help

samseed101

Not necessarily. But that would depend on what you want to change too. What mopds did you have in mind?

ZachW04Stang

Its not true but its definitly recommended. I have an 87 and I have small camshaft in it and a intake manifold as well as full exhaust. Now due to the camshaft my car has a slight surge at idle but an idle plate and restriction in the map sensor vacuum line have made it pretty steady.

dimebag

speed density is ok. what do you wanna do to your car? imean... you can make a SD car run 12s... but for some mods-mainly larger cams, maf is needed

jrt1990

Ya the previous owner did a bunch of mods including an E303 cam to my car that I have now and it doesn't run right at all, switch to MAF like me.

bighungrymatt

I switched to maf on my 87 because it was easier for me to get it tuned that way

67mustang302

You either have to switch to MAF, or if you keep SD you need to make sure the car will idle well(decent idle cam, no big intakes etc, have to have good idle vac, no vac fluxuations) and if you change anything on SD you have to retune the computer(if it changes theVE of the engine significantly)to get best performancesince the lookup tables in it are based on the engine as it came from the factory. Just switch to MAF, be WAY easier in the long run and make tuning/performance options much less of a hastle. Or run a carb

slowfox

thanks everyone for your help so far. right now i have full exhaust and a cold air intake and will soon have my shift kit and 3:73 gears in, but im looking at putting heads on there from my buddys 91GT there stock GT heads but have been hoged out and that stuff with 1.7 roller rockers. and i want to put a E303 in it to anyone think that would be ok for now intill i swap to mass air

jrt1990

I don't think the E303 will work with the SD very well. It won't idle quite right.