Just noticed that my tachometer does not have a red or orange marking indicating the redline. It just black and white all the way up to 6000. Have others noticed this as well? All the other vehicles that I have owed or been in have the redline indicated. Weird...

------------------

• 2001 F150 Bucky Badger Red XLT 4X4 SuperCrew Gen 1
• 5.4L, 3.55 LS, Slider, Class III
• Westin CPS nerf bars
• ARE LSII
• BedRug

 

That's a good question? wonder what mine is??? any takers on this one. I do know what ever rpm you make max horsepower is going to be the red line but i am not positive.

------------------
1997 F-150 XLT 4.6 REGULAR CAB, FLARESIDE PACIFIC CLEARCOAT GREEN 5-SPEED. WESTIN NERF BARS, POWER EVERYTHING,BUG SHIELD, EX-TANG SOFT COVER, BED LINER(FORD).

Better 1/2 : 92 Red T-Bird.

 

On my truck "99 4.6 5 speed the truck will not do anymore than 5200rpm's in any gear! The top end is at 3200 in 5th gear at 97mph.Its all computer controlled. This is my experience on my truck, don't know if this will help or not?

------------------
Jeff Sedler

 

the PCM (computer) shuts it down about 5200 to 5400 rpm so they have built-in "redlines".

------------------
97 Lariet-sc-4.6-4x off road-auto-3.55 LS-
superchip-Airraid-Perma-cool electric fan & controller

 

I think redlariat is right. The fuel shut off (rev limiter) is about 5400. Not even a chip would raise that, and shouldn't. Hey, all the power is below there anyway.

------------------
2000 EDDIE BAUER EXPEDITION 4x2

• Estate Green
• 5.4 ltr
• 3:55 LS rear
• Superchip!
• Airaid FIPK
• Gibson S/S Swept Side Cat Back Exhaust
• Hellwig Rear Anti-Sway Bar
• Energy Suspension Polyurethane Front Anti-Sway Bar Bushings
• Edelbrock Performer IAS Shocks
• Mobil 1
• Xenon Super White Head and Driving Lights
• Tow Package
• Rear Load Leveling
• Moonroof
• Century Child Seat!

-->Follow Me...<--

 

I've looked it up... it's 6150 for the 5.4 and 6250 for the 4.6. The computer will let it rev that high if you lock it in low and slam on it. I personally wouldn't try it, but I've seen it done before... no power at those revs, so there really is no point

------------------
1998 F-150 Lariat SC
Toreador Red w/ Harvest Gold Trim around bottom
5.4L SOHC Triton V-8
K&N Filtercharger
4x4; 3.55 LS; Off Road Pkg.; 17" wheels; 4x4 shifter ON THE FLOOR WHERE IT SHOULD BE
Bridgestone Dueler AT/S
Chrome Brush Guard w/2 Pilot 55w halogen driving lights
Chrome Double/Single Roll bar w/4 100w Eagle Eye Off road lights
Ford Insignia mud flaps
Flowmaster Cat-Back Duals w/2 chamber mufflers
GTS Headlight & Taillight Covers
Ventvisors
Hella Dual Trumpet horns
6-disc CD changer
Red interior lights
Uniden 40 Ch. CB Radio

 

I first noticed that the was no marked redline on the test drive of my truck I have always wondered but, never wanted to test that point. 6250 rpm's is a lot of revving for a little V8 to turn.

------------------
97 Ford F150 XLT 4x4 4.6L auto, Std cab/Long bed, 3.55LS rear axle, PW,PL, and PM, captian chairs w/arm rests
Sylvania Cool Blue Bulbs, Ford logo hitch and license plate, tinted windows, blackouts front and rear(w/ford logos on front blackouts),ventvisors all around, painted logos on door sills and under hood, 55w backup lights, K&N Filter, custom 4x4 emblems, cup holder/LED mod, 99 F150 Triton V8 emblems, and much more to come

 

There is no point in indicating a red line on the tach if there is no chance of letting the engine over-rev it. The computer shuts it down before it destroys itself, unlike older carbeurated(?sp) engines. That seems to be the way thi industry is going... I guess it makes sense. I mean, why would it be needed? Now, before everyone jumps down my back, I know it can be a handy visual reference on a manual trans, but even then, is it essential?

-Joe-

 

My guess:
The red line indicator was for the driver to keep from over revving the engine, before all the computer controls. Now there is a handy dandy computer to keep people from killing their engine, by over revving. I thought it strange at first, there being no redline. I've learned a lot here though. The tach is a good idea. Now it is more important to watch that you stay within the usable power range rather than watching how close you are to blowing the motor.
Family Ride, Im thinking I saw on the "computer chips" board that the rev limit goes from 5400 to 5700 with the chip. I guess it dosn't make any difference, thats past the power curve.
Well like I said, my guess.
Tom

------------------
'98 F150 XLT,short bed, STX appearance group, 4.6, 5-speed.
Current mods: K&N air filter, cat back exhaust (Flowmaster 40 w/dual rear side exit), Superchip.
Future mods: short throw shifter, K&N FIPK, lowered suspension, other things seen here!