Micro Tuner came today, install was so easy that my 9 yr old could've done it! Filled up with Citgo 93 octane earlier so I was ready!

Just about sprouted wood! Big time improvement. In addition to the very noticeable power increase the truck now seems to run very smooth, not that there was anything wrong before, it's only got 23,500 miles on it, but again a noticeable difference.

All in all, with all the other programming options built in, money well spent in my opinion.

Now if I can find a group buy for the underdrive pullies and a gatorback belt...

 

By the way, Mike and Anita are great! I'm sure I'll be a repeat customer!

 

I installed mine yesterday and have put 60 or so miles on it. I feel like the truck is a bit stronger accelerating and I like the fact I was able to fix the speedo since I've got bigger than stock tires. All in all, a very good product and definitely worth the money -

Mike

 

I am going to buy a Microtuner tomorrow. One thing thing I am interested in is calibrating my speedometer. My truck is a 2003 Supercrew FX4 and the speedometer always says I am going about 1.5 to 2 miles per hour faster than I am. Yea, I know it is a micro thing, but as long as I am getting the Microtuner it is certainly something I intend to adjust.

Tom Hall

 

Hi Tom,

It's absolutely typical for stock factory speedos, with no changes to tire size or gear ratio, to be say, 2 mph off at 75 mph for example. C&D did just such a comparison on a number of vehicles a couple of years ago (including Ford F-150), to show just how accurate factory speedo's were, and they found virtually all vehicles they tested to be a little bit off in their speedo calibration/display, and that the faster the vehicles went, the more speedo error they had (which is normal).

When you recalibrate your speedometer with the Micro Tuner, you have to enter in your exact tire height in inches, and it's resolution is 1/4" of tire height. So don't expect to have absolute dead spot-on accuracy, that certainly does not happen from the factory, and may or may not happen with the Micro Tuner. What it really gets down to is this: Unless your measured tire height happens to fall right on one of those 1/4" intervals (say, 30-1/4", 30-1/2". 30-3/4", or a tire size of whole inches, I.E., 31.0 inches), it may still have a tiny bit of error.

This is why I do not advise trying to perfect a small factory speedo error, say, 1-2 mph off at 50-70 mph or so. You can certainly try & please feel free, but it may not resolve perfectly.

Another point to remember just in general about speedo calibrations is that speedometers are never "5 mph off," or "3 mph off," etc. across the board, at any speed, it doesn't work like that. Speedometer errors are straight linear percentage-based errors, I.E., being 2 mph off @ 50 mph the speedo will be 4 mph off @ 100 mph, and so on.

You will need to manually measure your exact tire height as installed on the vehicle, you won't be just entering in a P-metric size into the Micro Tuner, it wants exact height in inches, with intervals of 1/4". Measure from pavement to top center of one of the rear tires. If you have one available, you can even use a short level (preferably 1 ft., but a 6" level will do) across the top of the tire to indicate tire measurement when level. You will then have to enter the tire height in inches into the Micro Tuner, again, the resolution is 1/4".

You'll certainly be able to get the speedo *very* close, if not dead on, it's a matter of how close your tire height is to those 1.4" intervals, basically. Just FYI............

 

I just ordered the Microtuner (1715) this morning from your very pleasant wife and am really looking forward to my new toy! I've got a whole tank of 87 to get rid of before it gets here so I just had it shipped regular UPS ground. It will go into a 2003 SuperCrew 5.4L Engine, 3.73s, FX4, 17" wheels, with a K&N Air Filter.

See My Gallery Here

My 2 MPH error is certainly is not the reason that I ordered it, but
I will no doubt do some tweaking and try to optimise my speedometer. What the hay . . . I'll have the tool in a week or so, therefore it must be played with.

This forum and your input to it have been a great resource for me and many others.

Thanks for everything,

Tom

 

Hi Tom,

Thanks for your response.

Do let us know how it goes correcting the small factory error, that will be interesting to see just how close your tires are to those 1/4" intervals and the actual result. Since I'm an unabashed data hound, if you wouldn't mind, when you post your results on that I'd be curious to know at what speed your speedometer was 2 mph off to begin with, just so I can calculate the % of error. We data hounds are PITA's.

Since you have a tank of 87, having us ship it via Ground was of course the smart thing to do, as that will usually take 5 working days to get from us to where you are (Washington state, I think?), as is basically the case with your shipment.

Glad to see you have the 3.73 gears with those 17" factory wheels & tires, most have 3.55's & they need more gear (we've got one like that). Looks like you've got a very nice configuration there in your new F-150, should be a good runner & cruiser!

Thanks for your order & talk to you soon!

 

I have been in one field of engineering or another my whole life and I know what data is and what data isn't. Sometimes it is hard to get what you are after, but I will let you know what I come up with.

Tom

 

Hi Tom,

>>>I have been in one field of engineering or another my whole life and I know what data is and what data isn't.<<<

Sounds like you understand/tolerate us data hounds pretty well then.

Thanks for your response & good luck!