Just wanted to know if i could use a chip on my 1991 F-250?
I have a bunch of mods done like Edelbrock heads,intake,throttle body,and a Crane compu cam.
Is there a way to upgrade the computer to adjust to the mods i've done?
I heard that i'm getting robbed of some performance,if i dont convert to mass-air.I really don't want to convert........there's gotta be some other option.
Thanks for any advice.
Jerry D.

http://hometown.aol.com/dvldog458/myhomepage/auto.html

 

Hi Jerry,

Yes, we can do custom programming for just about any modification, but those speed density systems like you have are not very tolerant and can't take advantage of camshaft & many other types of mechanical changes. You're right, you're not getting anywhere near what you should be getting from those parts, and won't as long as you remain speed-density.

The first place to start is with the conversion over to mass air, and then with a good custom program to get all that power you're missing. It will be well worth the cost.

To go over this in detail, please feel free to give us a call, our contact info is just below.

 

Dvldog,

You may want to do some searching over at the NLOC boards, and some of the Mustang sites as well.

I have heard that speed density systems are at a large disadvantage and that mass air was the only was to go. Having come across more data in my internet "travels" I'm not as convinced. There are a lot of people making BIG hp with speed density systems.

My truck is mass air and I'm glad, but I don't think you are really getting hurt at the performance levels you are looking at. Just my .02, but I have become a firm believer that SD systems are up to a much larger task than they are given credit for.

 

Thats what i like to hear.......some good things about S/D.
And man the mass air kit isn't cheap!
Thanks for the advice.

 

No, mass air isn't cheap, and as long as you aren't having problems with idle quality or basic driveability issues such as stumbling, etc. you should be just fine. It's when you get into doing modifications that significantly alter the motor's load signal that you run into trouble in these speed-density systems, which will never be as tolerant of changes to things like lobe centerline, overlap & duration, among other things, as mass air systems, as they don't "measure" incoming air, they use MAP (manifold absolute pressure) sensors, which operate on a principle of measuring pressure drop (meaning engine vacumm) basically, which are not as accurate or as responsive as a mass-air type of system.

That doesn't mean they "can't work" and that you have to rush out & convert to mass air. Ifyou want to make the most of your performance, converting to mass air is a step that should be planned for, as it opens up a lot of other choices & possibilities and many times lowers the cost of further modifications. Whether that is applicable to you really depends on just how far you want to take the performance of this vehicle. If you're basically happy with what you have now and don't plan on taking the vehicle much further, stick with what you have. You might want to pick up the Superchip tuned for your modifications to get some more power and tune for your mods, and then and leave it at that and just enjoy the vehicle.

By all means check out the sources that Signmaster mentioned, that's a fine idea.

Best of luck whatever you decide!

 

Thanks mike......i appreciate your honesty.