It will never go away unless we stop posting on it.

Of course, I didnt help very much just now by....by....posting on it.

 

LoL...I know...but there is really no info on top speeds...weve all strated its between 97-100 stock.

Garrett

 

It will go away if we stop posting on it.

But you know Joe, now that he knows we want it to go away, he'll keep posting on it on purpose, just to be......well, Joe.

 

voltage regulator? . . .

 

ah, so predictable.

 

'03 E-250 AOD 4.2L, speed limiter (governer) kicks in at 83 to 85 mph won't turn off till I drop back to 80 or 81. It sucks! I try to run 83, but most people round Atlanta run 80, and when I try to pass they speed up, I hit the limiter, fall back behind and have to wait for an uphill grade to get around them,( yes, an up hill grade ).
Makes my mpg go worse than the hell it allready is, causes lots of carbon at tail pipe, and, maybe my imagination, but the truck seems to run like crap for 30 or 40 miles after, if I stay on the limiter too much.
I may take aride out to the suburbs and talk to Ken.
It's a big truck with ladder racks and ladders, so I'm not expecting miracles, but 95 mph on occasion would be nice.
Mike

 

As mentioned previously, the point of the speed limiter is the critical rpm of the stock driveshaft. The limiter in most States-side vehicles is set to give a 10-15 percent cushion of speed so that you can't damage the driveshaft going down a hill ( exceeding the limiter due to gravity) and also for as the truck gets older the shaft may unbalance or warp. If you want to go faster than 115 (probably the highest you could safely go before the shaft goes critical) is to go out and either get an Aluminum, balanced driveshaft or even better go out and get a Ceramic-Metal MatriCMX) driveshaft for the ultimate in lightweight performance.

The thing with these driveshafts it you will lose a miniscule amount of starting wheel torque due to less weight in the driveline to add mass (Swing a bucket with one gallon then 5 gallons...the 5 gallon will have more power initially but you could swing it less..while the 1 gallon would not have as much initial power....eh its not worth the explanation). This is miniscule though.

 

everybody wants the speed...but forgets that these trucks wont handle that well over a certain speed....If its fast ya want I'd go with a sports car....that a way you dont end up in a body bag. thats just my opinion, and ya know what they say about those.

 

All this driveshaft stuff makes sense, BUT, back when I drove company vans, mid to late 80's, I had 3 new E-250s with 5L and AOD. All of them would run 120+, (loaded or unloaded, they didn't care), with nary a vibration or shake. I don't know what would have a longer drive line than a full size van.
They also got better milage than this 4.2 I got now.

Mike

 

Mike you work with Ken? or just know him?

Secondly, I have my Sports Car, a 71 stang Mach 1....I jsut like my trucks to be well, better than the avg Joe. And throw on some new tires, and this truck handles exceptionally well. Exceptionally WELL! you would be amazed, I can only imagine what the right lowering kit and otehr suspension mods could do....

 

Don't know him or work with him, just been reading the posts and deciding to go with a chip. And happen to live pretty close to their shop.
When I want preformance I hop on the bike. But I haven't figgered out how to carry ladders and conduit and such on the scooter, so I work out of my van.


Mike

 

Mike, I would call first to make sure he can program the chip to remove your limiter. You should post this in the chips forum...he'll answer you pretty quick. Trust me, you will not be dissapointed with the chip.

 

Wow i hear u guys talking ur top speed of ur f-150's is about 100-105, but i just got my permit and i hit over 107 mph in my f150 with my sister on an empty interstate. My truck has: 4.2L V6 5-Speed over 60,000 miles and only upgrade is a K&N filter.

System: 2 12'' Profile Baja, over 500 watts, yeah i know it stinks but i like being able to say that i have 2 12's haha.

 

Top speed for me is more like 120 - 125.

Anyways, welcome aboard Joey! Hey, that's my name! Ooh, this could get confusing.

 

The speed limiter is a matter of tires, period. If the vehicle come with tires rated for 99 mph (as most pickups do) they truck will be speed limited to something below that speed, regardless of make (Ford, Dodge, Chevy) The Lightnings, Magnums etc. have V rated tires and thus higher speed limiters. Same thing for cars. A civilian Crown Vic (non sport model) come with S rated tires and are limited to around 109 mph. P71 (police models) come with V rated tires and are limited to about 129-132. It IS against regulations for the manufacturer to sell a vehicle that will exceed the speed rating on the factory tires.