is the GT redline only 6000 rpm?

Matt Gruber · Sep 29, 2004

C&D magazine shows both the power peak and redline @6000.
The redline is normally 250-500 rpm past the peak(in other cars)
Is it possible power is still climbing at 6k?
Either way, a higher redline should give a quicker ET.

MrMorden · Sep 29, 2004

Matt Gruber said:
C&D magazine shows both the power peak and redline @6000.
The redline is normally 250-500 rpm past the peak(in other cars)
Is it possible power is still climbing at 6k?
Either way, a higher redline should give a quicker ET.

The redline appears to be set at either 6000 or 6250, just like the current car. Rmember, these are essentially truck heads, and may not flow real well much beyond that rpm level.

The real limiting factor, though, is probably the valve springs, as in the current car. Better springs (and maybe different cams, depending on how the stock ones are set up) would probably get you to 6500-7000, but there's no guarantee the car would make any more power up there without porting the heads or a different intake.

SN95StangMan · Sep 29, 2004

94SC50 said:
I just saw the program on Discovery about the "Boy Racer" project and they took that baby up to 7250 on a dyno!

They were using the FRPP 5.0 cammer, JR

94TURBO5 O · Sep 29, 2004

I just saw the program on Discovery about the "Boy Racer" project and they took that baby up to 7250 on a dyno!

one2gamble · Sep 29, 2004

different motor

94TURBO5 O · Sep 29, 2004

SN95StangMan said:
They were using the FRPP 5.0 cammer, JR

mmmmh....sounds AWESOME!

scottie1113 · Sep 29, 2004

Since I'm not a 1/4 mile guy, I'd rather have lots of low end torque than high rpm horsepower. After all, that's what counts in daily driving,and it's why the Honda S2000 is such a slug in traffic. How often can you get that car up to high revs during your normal trips around town?. Extreme examples maybe, but I hope you get my point.

Matt Gruber · Sep 29, 2004

i'm not a guy that tows, so HP is very important in a muscle car for me. Fords VCT+3valves/cyl allows for a plenty wide power band. IMO ford is sandbagging. The primary reason for OHC is more rpm. BOSS MACH1 & Cobra will show more of what it can do.

vrpirata · Sep 29, 2004

scottie1113 said:
Since I'm not a 1/4 mile guy, I'd rather have lots of low end torque than high rpm horsepower. After all, that's what counts in daily driving,and it's why the Honda S2000 is such a slug in traffic. How often can you get that car up to high revs during your normal trips around town?. Extreme examples maybe, but I hope you get my point.

Why to have only torque when you can have both HP&TQ !!!

YellowBullet · Oct 19, 2004

scottie1113 said:
Since I'm not a 1/4 mile guy, I'd rather have lots of low end torque than high rpm horsepower. After all, that's what counts in daily driving,and it's why the Honda S2000 is such a slug in traffic. How often can you get that car up to high revs during your normal trips around town?. Extreme examples maybe, but I hope you get my point.

I'm affraid I don't get your point. If you're just cruising, then you're just cruising and it doesn't matter if your car can accelerate like a Lambo or like a Town Car.
If you want to accelerate, then good acceleration in a GT is just a stomp on the gas away, while good acceleration in an S2000 is just a flick of the wrist and a stomp on the gas away. Not a big difference IMHO.

Yeah, leave it in the 6th gear and step on the gas and not much will happen. But that's true for pretty much any car out there.

Stang8URMPRT · Oct 19, 2004

The redline on the GT is 6200, even though the redline on the tach reads 6000. Fuel cutoff starts at 6200.

MustangGlx · Oct 19, 2004

Matt Gruber said:
C&D magazine shows both the power peak and redline @6000.
The redline is normally 250-500 rpm past the peak(in other cars)
Is it possible power is still climbing at 6k?
Either way, a higher redline should give a quicker ET.

it is possible that it could still be climbing, i remember readin in one of my hemmings muscle machines that in the late 60's and even in the 70's and 80's car companie would rate the horsepower and redline at too high or low rpm, mainly to fool insuarance companies. I doubt that they would do that now, but its possible

351CJ · Oct 20, 2004

Stang8URMPRT said:
The redline on the GT is 6200, even though the redline on the tach reads 6000. Fuel cutoff starts at 6200.

It this from Ford info?

Or have you already wound one out to fuel cutoff?

351CJ · Oct 20, 2004

MrMorden said:
The redline appears to be set at either 6000 or 6250, just like the current car. Rmember, these are essentially truck heads, and may not flow real well much beyond that rpm level.

The real limiting factor, though, is probably the valve springs, as in the current car. Better springs (and maybe different cams, depending on how the stock ones are set up) would probably get you to 6500-7000, but there's no guarantee the car would make any more power up there without porting the heads or a different intake.

There was a thread here on Stang-Net that posted a link to an article that gave the flow #'s for the 2V, 3V & 4V heads (5.0 Mag??).

The 2V head flowed 95% of the intake air as the 4V head does. This says to me that with the right cams & intake it would make max power at 6800 - 7000 RPM.

You are right about the valve springs being the limiting factor, but the 3V head should be superior in this regard to the 2V. The limiting factor in the 2V head is the mass of the single large intake valve. Getting a valve spring and damper that can control the valve motion limits the useable RPM. Since the 3V uses 2 much smaller intake valves that have less mass, they should be able to open and close at a much higher rate than the single large 2V intake valve.

So the RPM limiting factor in the 3V head becomes the mass of the single exhaust valve. Since the exhaust valve is smaller (less mass) than the intake valve on the 2V head, the 3V head should be capable of higher RPMs than the 2V head.

But the 4V head will still have the highest allowable RPM based on valve train limitations.

Stang8URMPRT · Oct 20, 2004

My bad, I was off by 50 RPM... Motor Trend reports:
"Compression is a relatively high 9.8:1, and the engine redlines at 6250 revs. "

351CJ · Oct 20, 2004

Stang8URMPRT said:
My bad, I was off by 50 RPM... Motor Trend reports:
"Compression is a relatively high 9.8:1, and the engine redlines at 6250 revs. "

Yea, but I don't trust anything in the car rags because they get so much info. wrong.

What we need is someone who has gotten their brand new 05 GT to test out what RPM fuel cut off occurs at and report back to us.

Stang8URMPRT · Oct 20, 2004

Their info was straight from Ford. So I doubt it's wrong.

is the GT redline only 6000 rpm?

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