Come to CT with a TFI distributor for me and i'll take you for a ride. Over 4000 in fourth is not that difficult (with current broke-@$$ distributor it calls me names if I go over 3000 ). Still, even with its current issues blowing past 85 is easy as pie in OD.


-=Whittey=-

 

I don't really know... it's just fun to show pics of the buried speedo, and although both of those shots were taken on level ground, they were both also at the bottom of a long hill, which helped out my speed a lot.

And your question got me to thinking, so I figured up how fast I actually was going, but the thing is, I don't know what my rear axle ratio is for sure.... but if I have a 3.07, then at 3400 rpm, I would be going about 93 mph. If I have a 2.94, then it would be 99 mph. I imagine it's a 3.07, because it does feel like the trucks speedometer is a couple of mph optimistic. I checked my axle code against the ones listed in the manual I have, but it didn't show whatever letter I have as being availible in 77! And honestly, I'm too lazy to jack it up and do the whole turn the driveshaft/count the revs thing....

 

Speed limiter, governor, whatever you want to call it....they can be taken off, which is the case on my truck. What do us guys who've gone over 115 have to do to prove to the rest of you guys that it's possible? Here's what I'm gonna do. I'm gonna take my truck out on I-20, with my buddy in his 1994 LT1 Camaro Z28, and haul a$$ until I hit my top speed, then he's gonna take a picture of him on my butt with his speedo in the picture, along with the a$$ end of my truck. Then, I'm gonna post that pic somewhere, and shed some light on you guys that don't know.

 

i've had my 80 bronco with 3.55 with a 3spd w/low gear up to 84 checked with my gps against my speedo but that WAS with a tail wind .not sure about the tach putting one this weekend but i can tell ya it sounded like the thing was going to blow

 

ok guys, lets take a few deep breathes before this thread gets out of hand.

 

i agree 100% with chuckman. Their is also a difference between theory and practice the two are very rarely the same thing. And SilverStreak if you dont belive me i really dont care because i had a passenger with me and I ve done it before with other passengers in both cars. and another thing my motor isnt a 100% stock either

 

I don't think there's a rev limiter on my '95 computer or ignition module because I've accidentally overrevved it twice in the last 2 weeks - once from the cruise control and once from the floormat. Both times it went over 5000RPM.

I know there's no speed limiter because I didn't hook the speedometer up to the EEC when I wired everything in. Both of them work fine, but they're not connected, so the EEC/ignition never know the speed the truck is going. They only know RPM, which, as I just said, I know is unregulated.

 

If there is a rev limiter, as Silver Streak said, it's up there way too high to do any good. My 95 owners and shop manuals state there is a rev and speed limiter on all engines. But I've never even tried to find the rev limiter on any truck.

I too am very sceptical of some of the claims here. My I6 would going ~126 mph at 4500 rpm, but just because it can rev that high doesn't mean it can go that fast. These trucks have a lot of wind resistance, especially going 100+ mph. Kinda funny also nobody has said how they disabled the speed limiter.

 

I didn't disable the speed limiter. I sure as hell hit it though.


-=Whittey=-

 

i just got clocked doing 81 in a 55 this weekend. and i was pushing my ****kicker to the limit. i was reving like 3k in 3rd gear. for some reason i cant get past 2.5k/3k when in 3rd gear.

 

as an 18 year old mechanic who works at a ford dealership...i aint gonna say that i know everything. however, i do know enough to say that silver streak doesn't know what he/she's talkin about. my fully stock 82 f-100 w/ I6 can push 100 easily and 120-125 when the engines good and warm. the easiest way to do it is wind out 1st gear as far as you can. on mine i wind it out to about 6000 - 6500 rpm. that will keep your rpm's above 3500 when you shift to 2nd gear. now when i hit 3rd at about 5500 rpm...they do a nose dive...down to about 2700 rpm...but by that time i'm at a good 65 or 70 mph so it is smooth sailin from there. but you have to listen and feel the engine to really know when to shift. i rarely use my racing tach/shift light/redline light. you gotta feel your truck and get to know it before you try winding out the gears. its risky business but it is very rewarding. my goal is 140 w/ a regeared transmission and some upgrade performance parts. good luck boys
~john

p.s. question about speedlimiters and govenors: is the speedlimiter standard equipment on any trim level ford? b/c mine is the xl level and i dont think i have one. also, govenors keep your rpms down but with a standard the govenor is pointless b/c u do the shifting...?

 

i know that i have had my truck 93 4x4 e4od 3.08 past 85mph all the way to the peg and still gaining speed that was up a small grade. when i let off the gas it took about a mile before the needle came off the peg. i do not have a tach the only mods i have is a KnN air filter and gutted cat 2.5 straight pipe oh and i had my tail gate down.............hey steve83 good to see your back

 

as an 18 year old mechanic who works at a ford dealership

That's scary

...i aint gonna say that i know everything. however, i do know enough to say that silver streak doesn't know what he/she's talkin about.

In the remainder of your post you display that you don't know enough to even post intelligently to this thread, never mind knowing enough to tell me I don't know what I'm talking about.

my fully stock 82 f-100 w/ I6 can push 100 easily and 120-125 when the engines good and warm.

There isn't 20-25 mph difference in a warm engine vs a cold one. How high does your speedometer go anyway?

the easiest way to do it is wind out 1st gear as far as you can. on mine i wind it out to about 6000 - 6500 rpm.

This is really the wrong forum to post the claim of a 6500 rpm bone stock 300 in.

that will keep your rpm's above 3500 when you shift to 2nd gear. now when i hit 3rd at about 5500 rpm...they do a nose dive...down to about 2700 rpm...but by that time i'm at a good 65 or 70 mph so it is smooth sailin from there.

This makes absolutely no sense. Your truck struggles to make it to 65 or 70 unless you (allegedly) wind it to 6500 rpm in 1st gear, but it will continue to pull to 125 with no problems. Please.

but you have to listen and feel the engine to really know when to shift. i rarely use my racing tach/shift light/redline light. you gotta feel your truck and get to know it before you try winding out the gears.

This sounds like something an 18 year old kid who drives a Civic with 2 foot tall wing and horrible graphics would say.

its risky business but it is very rewarding. my goal is 140 w/ a regeared transmission and some upgrade performance parts. good luck boys

Good luck yourself. A 400+ hp truck can barely manage 140. Doing it with a box-like 82 will take considerably more.

p.s. question about speedlimiters and govenors: is the speedlimiter standard equipment on any trim level ford? b/c mine is the xl level and i dont think i have one.

You don't have one because your truck is carbureted, not because of the trim level.

[/b]also, govenors keep your rpms down but with a standard the govenor is pointless b/c u do the shifting...? [/B]

It isn't a governor, it's a speed limiter. It doesn't matter what gear you are in, when the PCM gets a signal from the speed sensor that you are going to fast it shuts down the engine.

Since the subject of the speed limiter came up, I am waiting to hear exactly how it was removed. As brown 4x4 said, there has been a lot of talk about removing it, but nobody seems willing to share how they did it.

We're also still waiting on visual proof of top speed from several people. It's been 8 months; where's the goods?

 

Well, OK, this thread has probably been going on for too long but here's THE TRUTH on MY 300. Bored +.060, ballanced, 10.5 CR, ported, mated Clifford intake/Holley 390 4bbl., mated & ported EFI exhaust manifolds, Walker downpipe, Maremont hi flow cat, Hooker Aerochamber muffler - 2 1/2" single exhaust from front to back. STOCK cam. No headers, FI, turbo, blower...

BW 4 speed manual, 3.50 gears & 31" tires...

She'll do 75 @ 3000 rpm.
She'll do 85 @ 3300 rpm - accelerating up a moderate hill.

That's as fast as I usually EVER run her, but have, on very rare occaisions & under the right circumstances (long, straight, DESERTED 3 lane), had it up to 4,000 rpm, which calculates out to 108. I LET UP - she had more to give.

I've had her over 4500 in 3rd a time or two which leads me to believe she could do 125- 130 - but I'll NEVER know that for sure! I've learned to enjoy the journey as much as the destination. A trip down 6,000" to sea level would be veddy interestink.

I get more fun out of the torque she has getting up to 75 - 85. I can go from 75 to 85 in around 5 seconds - I'll time it closer next time I do it. Maybe take a picture of 4500 rpm in 4th, needle burried - nah. Prior to the rebuild (bone stock), I doubt I could've cracked 90 - unless it was down a long hill.

and THAT's the truth...Broncr

 

Actually, silverstreak, you missed one thing. I KNOW for a fact that on some Ford products you can "fool" the governor by kicking it into a lower gear (automatic, never tried it with a manual) if there are RPM available for the computer to shift. Don't know about the trucks, though. Try it sometime, get it to the governor speed without the full pedal (easy in SOME cars like the crown vic, and lincoln that I have done it in), then mash it so it downshifts. I got past the 106 limiter in the lincoln to 113 before it shut down that time. Pretty cool. As for trucks going 120??? Not likely, but I can't say for sure. I know that my 140HP celica struggled to make 135mph, and that was right in the middle of it's powerband (5900rpm). I also know that virtually every stock or nearly car I have topped out that had no governor struggled at around 110, and few have crossed 120mph.

Those of you who claim to have done it, good for you. Either you feel better boasting yourself up on internet forums, or you have a truck that seems to be VASTLY superior to any 300's I know of. Cheers.