I have heard 6500, 6250, 6800 or the car shows 6000.

What is it for the 4.6L GT.

I have retuned it, so I hit 6500 the other day (note to self, do not do a burn out with a set of 4.10 gears in 1st gear.....red line comes up awful fast!).

Second is better.

 

The stock rev limiter is set at 6200. I bumped mine to 7000.

 

Is 7000 safe for these engines in stock form? I will say that the power just seems to be getting perfect and the factory set rev limiter comes on too quick for me. I thought 200 rmp more would be perfect, but 7000, that seems a bit scarey.

 

I have mine set at 6800.

 

I don't take it to 7000. My car pulls right to 6400 so the extra gives me time to shift. The absolute worst thing you could do besides missing a shift is hit the rev limiter so. I put it high enough I don't ever have to worry about it.

 

I believe Brenspeed has their rev limiter set fo 6800 on canned tunes.

 

Stock is set at 6250rpm. Now do these can tunes, that everybody has, change the power curve of the stock engine? The stock engine stops making HP around 5400-5500rpm. So why change the max rpm setting pass 6250?

 

i know after a point, i think around 6500-6800 rpms, if you look at a dyno the mustang actually stops making power after this point to there is no point in going past it. it would be more productive to shift and keep accelerating through the next gear

 

I got a link to my dyno sheet in my sig where it says the rwhp #'s. It pulls to 6300-6400 then drops off.

 

well mine is at 7000 and I hit it all the time. It may not make power but when accelerating quickly from first you need that extra RPM if you get anxious and over rev a shift it keeps the car from suddenly hitting a brick wall. I have had mine like that for 97,000 miles and the top end of the motor is just starting to make noise. But I no longer have to worry about the top end for a while since my brother wrecked my car at 12am this morning.

 

Well that was god d@mn depressing. So sorry to hear that man! But you do make a good point. It's nice to have the fudge room.

 

It was depressing. He took the car to school to diagnose a ticking noise from the passenger side bank.(he is doing valve train for UTI ford fact program) Found the problem but someone cut him off on his way home and he cliped a rain drain @ 50 MPH and destroyed the driver side front. Sorry mods for the tangent. Ill post pics.

 

Click on the links to see the pictures

 

Good gawd? Is he ok atleast? Will insurance cover it?

 

Well at least he found the problem. That's something...I guess. What was it by the way?

 

My bro is ok. I hope the insurance will cover it. I was almost hoping for a total but I will find out when the adjuster comes on thursday. The cam phasers needed to be replaced. Also I have ordered 24 new lash adjusters. But yeah other than that the 7000 RPM rev limit is only ever reached in 1st gear. 2nd I usually shift at 6600 3rd 6500 and 4th 6500. Sometimes i wish I had the ability to put the limiter at 7500 because I would hit it so much. i also have 3.90:1 gears out back as well. I have hit the limiter at 7000 almost 3 times a day for the past 100,000 miles that I have put on it. It has never been babied and some people worry about hurting the bottom end on these cars by revving it high. These motors are built well and can take the abuse in N/A form. I can a test to that. I think that if I had any other type of car that the motor would not survive. I have run Mobil 1 full synthetic from 1500 miles till now. The car may no longer be worth that much but it has held up to now 3 accidents, 2 transmissions, 3 rear end rebuilds, 2 different exhaust setups, 200 missed shifts, 50 donuts, 100 drag strip passes, 30 140 MPH @ 6200 RPM runs. So I think that you can set the rev limit as high as you want and you wont hurt this motor.

 

Good to hear everyone is OK. Cars can be repaired. Just chalk it up to another war story for the car.

Great news about the engine hanging in there so well after all the abuse! I fully expect my engine to last much longer than the car built around it ever will. Who knows, you might be reading about me crossing the million mile mark in about 25 years!! That is of course, if gasoline is even still around by then.

 

Even though the power begins to fall off at 5500 rpm, it doesn't drop like a rock so there are times when staying in it is better than wasting (losing) time shifting for those of us running a manual trans. This is especially helpful at the drag strip with 3:55 gears when you can cross the line in 3rd gear at 6300 - 6400 rpm and save a tenth or two compared to shifting to 4th at 5500 rpm before crossing the line. I've let mine set at 6800 from Brenspeed with the C&L.

 

I set the limiter to 7000 rpm's in my 07 GT automatic, but I shift manually at 6500 rpm's at the dragstrip, and have found that to be ideal with my best ET's. With a big stall converter, no matter where I shift, the next gear always comes on at 4300 rpm's, which is the flash rpm's from the Fuddle Racing Converter that's in my car.

 

Thats an awsome combo and puts your car in the torque peak every time it shifts.