Brand newbie so be gentle. Bought 1991 mustang 5.0 and it has a Vortech entry level supercharger. Idle lopes and when at cruise speed it acts like it’s losing power and sometimes chugs. I’m carb guy.. this car is just a clean ac car show car. I believe it’s still on stock computer. How can I tune this thing without having to depend on tuners those guys get expensive. Plus I plan to change stock heads and cam. And I’m sure it will definitely need to be tuned then. It’s got 19lbs injectors not sure on maf. It’s has a fmu and stock tb and stock upper and lower intake

 

https://www.holley.com/products/fue...rd_kits/terminator_x_ford_kits/parts/550-937F

https://www.diyautotune.com/product/megasquirtpnp-g2-eec4a8-for-86-93-ford-mustang-5-0/

https://www.moates.net/quarterhorse-for-fords-p-199.html

 

Disney Lincoln would one of those be user friendly to a pc illiterate?

 

The Holley will be the easiest to work with, and it has the most user friendly auto tune imo.

 

T

hanks for your time sir

 

19 lb injectors and the vortech don't mix. Keep your foot out of it until you have an AFR gauge.

 

Yes sir I agree but I bought this way and it’s acting up and I’m old school (carburetor guy) so I gotta get a understanding of fuel injection. And it will have a afr on it. This lx is ac car very clean with a supercharger making maybe 5 lbs still has stock eeciv stock tb stock upper and lower 19lbs injectors and a fmu. And I’m certain it should run better than it does. I wanna add a small cam and heads. And from this point I’m sure I’ll need some kind of stand alone and I know nothing about em or how to tune with em. But I also don’t wanna pay a tuner because then I’ll always have to pay a tuner I’m cheaplol

 

I can't imagine it gets easier than a Holley system.

 

Yes sir I appreciate info.

 

Yes sir I understand. We bought the car how it is. And it runs ok but idle has a tendency to drop rpms or cruising say 65 -70 mph it’s like it loses power. That’s ac on or off. Could I get away with just installing bigger injectors? To help this problem. I have a small b cam and heads for it also but hell I don’t want the tuning nightmare. So they will stay on the shelf.

 

You can get a "calibrated MAF" and matching injectors from most any mustang parts retailer. It won't be as well optimized as a tune but will work and should keep things safe. Overall the ecms in those cars are forgiving.

 

Thanks that helps a lot appreciate your time

 

My 2 cents is to go right to the Holley. A Maf, and injectors will get you closer, but does nothing to address ign timing, or fine tuning of cruise or idle. Spend the money you would on the maf and injectors on a Holley, and leave the Fmu for now if your budget doesn't allow for injectors. The Fmu isn't the best setup, but is quite predictable, and the Holley will tune around it. The bonus is that the Holley comes with a wide band, so there's one less thing to buy.

 

You can put a set of 42lb injectors and a blowthru MAF calibrated which should cover you to 500hp as long as you also upgrade your to a Walbro 255lph fuel pump but that doesn’t mean your cars driveability will be perfect it still would be a good idea to do so like said before. The Holley might be expensive initially but if you learn how to tune it yourself that’s a big saving. If you can run the Holley speed density then you wouldn’t need to spend money on a MAF

 

Thanks for help