Please elaborate on this 94-95 Mustang 70MM MAF. I have a 94 F150 with MAF. How big is my stock MAF? What kind of performance gain can I expect by installing a 94-95 Mustang MAF? Possibly any mileage gain?

Also, don't bypass the coolant. It will only heat up the TB and possibly cause the EGR to clog due to excess heat. Now I have heard of completely blocking the EGR with some stainless steel sheet. Not sure how this affects the computer though.

 

www.wazeepulleys.com has a delete plate for the EGR, then you just have to block the exhaust end. A penny can be used for that...Only problem is, like I mentioned before, EEC adds timing when it expects the valve to be open, so you will likely have pinging problems and the computer backing out all your timing if you do so without a tuner (EEC Tuner, TwEECer, or SCT tune) to cal it out.

The coolant DOES cool off your EGR gasses before they hit your intake. Don't believe me? Set up to monitor your timing, then try a loaded pull with and without the coolant lines. You have more timing with the lines installed, the 'puter pulls your timing because you will ping with them plugged. Whether you hear it or not.

I never said you would necessarily feel 2-5 HP, but if it's there, it's there. And when you are making free HP like this stuff, it usually leads to better mileage too. And if we all ignored the 5 HP here, 5 HP there stuff, it would be very hard to make power. They add up.

If you know your vehicle very well, you will feel anything in the 10 HP range with the SOTP Butt-o-meter. For example, my Mustang, Running the TwEECer, I have played with stuff that will hurt me by 5-10 HP, and I feel it. I can feel the sluggishness when timing gets backed out over 200 degrees, or just the difference on a really hot day. Can you feel it when your A/C clutch kicks in? it only takes about 10 HP to operate it IIRC...

I don't know the stock MAF size. Mustangs came with a 55mm MAF before '94, though, so it's probably in that range. Newer 'stangs came with 80mm MAF's, too....

 

So basically it should be a plug and play, right? I take it the F150 has 19lb injectors already.

Does a MAF upgrade on a Mustang add any power or mileage?

Thanks for the upgrade info..

 

I still don't see how the coolant lines on the throttle body would cool off the EGR gasses in the intake. To see if I could actally notice a difference I hooked the lines back up (for two days)- no SOTP or response time for me. Sorry not saying your info is wrong- just saying what I have experienced. I have a question though. How could I Set up to monitor my timing without a tuner? Is there a way- I'm very interested in this a I agree 5HP is 5HP. And having a gas hog always looking for any way to improve mileage. And to answer your question I don't have A/C as I put in bypass pulley. But can remember the "drag" when it was on!-Bob

 

I thought the coolant line bypass was a good idea at first also. SVTCobra306 is right on the money. That EGR valve gets blazzing hot, and the coolant helps cool it and the hot air down also. I had my lines bypassed for a while as well. It seemed like it had better throttle response until the truck got up to temp, then the intake air got so hot that it killed performance. I have now hooked mine back up. Ford put that there for a reason. I have also heard that it stops the TB from frezzing up on a super cold day.

 

Sorry to take so long to answer ya, been busy. MAF upgrades add power, simply less restriction in the intake. Small mileage increases wouldn't be a surprise. Aftermarket MAF's usually "recalibrate" the fuel curve slightly, but this is best taken advantage of with the addition of a tuner.

'bout the only way I know of to monitor timing is with a datalogging device, IE Crane,TwEECer R/T, etc. Not sure if there are any timing-specific loggers out there. I use a TwEECer R/T in my 'Stang, it allows me to pick from a wide range of stuff to datalog, including timing, injector pulsewidth, MAF voltage, TPS voltage, 02 sensor voltage, RPM, Speed, MAF Flow, ECT temp, ACT temp, and lots lots more. This thing is worth way more than the 550 bucks it costs new, let alone the 350 or so I paid for mine off the 'net...