I was just looking at some 94-98 V6 stats and it hit me, I think I know why our cars have such a low hp rating. See the specs say 145 hp @ 4000 rpms. Nothing wrong with the sound of that right, but remember that Ford put the rev limitator at 4000 rpms on the 94-98s, and the 99-04s were 190 hp @ 5250 rpms, which again is the where the rev limitator kicks in at. Now granted the cars accelleration will be remotely the same even with the rev limitator removed or adjusted, but it does make you wonder what our cars real base hp is since those released are on cars with rev limits. In other words, kinda hard for a car to release its full potential with rev and top speed limits. See I removed my rev. limitator and therefor got rid of my 112 mph top speed, now it might be closer to 125, but not sure, only pushed it to 116, car comming the other way took care of me going any faster. Just wanted to see what you guys think on this, or am I just crazy?

 

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6ers have the same theroretical top speed as a GT, the problem is we dont have the HP to overcome drag, and its a pain in the **** to get it to shift into O/D that fast cause it wont shift a WOT.

 

OK, time to propose a question. Has anyone had their car, a 6, dynoed, with everything stock, but had the rev and top speed limitator removed?

 

when you dyno, you only use like 3rd gear.. so top speed wouldn't be an issue..

 

When I had mine done, he turned off the O/D and traction control. Afterward, the ABS lite was on, but it always resets within 10 minutes of normal driving. Nothing to be worried about.

 

i don't know mustangs too well. But correct me if i'm wrong.

That's only a standing rev limiter, so what would it have anything to do with HP? Underload, and in gear, it will definately rev past 4k. So how's that pertain to HP in terms of revolutions?

 

It doesn't. Butif you hit the limiter during a dyno pull, it can mess up the results. It's better to turn off the O/D, and TCS, and raise the limiter enough so it won't engauge during the test.

 

I think the basic argument here is that rpm=hp. Take, for example, F1 cars: 3liters, 900hp, 19,000rpm. The more air you put throught the engine, the more power you'll get. Of course, there is a limit to how far a streetable engine can go without floating the valves. Practical limit seems to be around 100hp/L in NA street cars (BMW M5 V10: 507hp @ 8,250rpm from 5.0L, or BMW M3 inline 6: 343hp @ 8,000rpm from 3.2L for example).

So, yes! raise the rev limiter and you'll get more power. As long as your valvetrain and fuel system can keep up, that is! Does anyone know the practical rpm limit to the '98-2001 V6??

Anyone know a way to raise the rpm limit and remove the speed limiter on a '99 V6 'Stang??

Greg

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I'm pretty sure the DiabloSport covers the 99's too. And as far as practicle, HotRods_N_Booze has his limiter set to 6300 Rpm, and I have mine set at 6250 Rpm. And we have no problems. The newer 3.8's like it in the higher RPM area!