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Is the 4.6 260hp underrated?

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Old 03-13-2006, 12:41 AM
  #11  
SOHCtimes2
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Default RE: Is the 4.6 260hp underrated?

ORIGINAL: Stang9946

ORIGINAL: djb1187

+1 and the 03/04 cobra
I disagree. I think the 385-390hp is accurate. I mean I could be wrong but I really disagree.
No its not...they dyno like 360-370ish at the wheels. 370 at the wheels, 15% drivetrain loss = 420-435ish crank hp.
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Old 03-13-2006, 01:13 AM
  #12  
Bullitthead
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Default RE: Is the 4.6 260hp underrated?

Ford got caught with its pants down over the '99 Cobra, and I think it started underrating its V-8 engines a bit from that point on. For example, the 2001 Mustangs got a .4 compression increase, but rated horsepower stayed the same. 'Stock '03-'04 Cobras always seem to dyno between 365-375rwhp everytime they get tested in the mags, indicating they probably make closer to 410-420hp stock. Then there's the '05 GT...I could go on and on...
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Old 03-13-2006, 01:28 AM
  #13  
stangc83
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Default RE: Is the 4.6 260hp underrated?

ok the mach 1 is basically a cobra engine minus the s/c. so it will push bout 320. the mach 1 just kinda keeps the insurance down and it wasn't build by svt which if you wanna keep the warantee then you need to go to an svt specialist. but the 1 means nothing, the mach 1 is trying to go back retro, remember the 1971 mach 1??? ok then.
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Old 03-13-2006, 01:59 AM
  #14  
steeda3
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Default RE: Is the 4.6 260hp underrated?

ORIGINAL: Bullitthead

For example, the 2001 Mustangs got a .4 compression increase, but rated horsepower stayed the same.
Yeah i wondered that myself....They actually got a boost in compression in 2000.....I don't think alot of Mustang owners realise there's a difference between the 99 GT's and the 00-04 GT's...Sure most of them know about the transmission change but few know about the compression increase......
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Old 03-13-2006, 02:07 AM
  #15  
JT76
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Default RE: Is the 4.6 260hp underrated?

so there is actually a difference between a 99 and say...my 02? hmmm learn something everyday
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Old 03-13-2006, 02:17 AM
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steeda3
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Default RE: Is the 4.6 260hp underrated?

ORIGINAL: stanggang1892

so there is actually a difference between a 99 and say...my 02? hmmm learn something everyday

That could be the reason why some 2000+GT owner's have trapped 100+ but who knows....
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Old 03-13-2006, 03:50 AM
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ZW99GT
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Default RE: Is the 4.6 260hp underrated?

You could say that about alot of things. some 99 Gt came with different blocks. Some could be faster than others. I dont really know anything about compression ratios, but Im not buying it. Anyone got a link? Id like to read up on this. There are alot of differences between the 99Gt to the 04, but its miniscule.

How did they change the compression ratio?
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Old 03-13-2006, 04:08 AM
  #18  
tool fan
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Default RE: Is the 4.6 260hp underrated?

So if the bullitt is underrated at 265........ what is is putting to the pavement????
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Old 03-13-2006, 09:21 AM
  #19  
70 MACH I
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Default RE: Is the 4.6 260hp underrated?

My thinking on the Bullitt, I believe they have a better flowing CAT setup. The only way I could get sound out of my GT to exceed my wife's Bullitt was by changing my cat setup to Hi-flow. Another giveaway is the low end torque a Bullitt has over a stock GT. They pull earlier, and just rip to redline after 3K. I had Bullitt mufflers on my GT, very little difference in noise or performance, yet when my wife would drive home and I was in the yard, I could pick up the sound of her car from 1/2 mile out.

John
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Old 03-13-2006, 10:47 AM
  #20  
tool fan
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Default RE: Is the 4.6 260hp underrated?


ORIGINAL: 70 MACH I

My thinking on the Bullitt, I believe they have a better flowing CAT setup. The only way I could get sound out of my GT to exceed my wife's Bullitt was by changing my cat setup to Hi-flow. Another giveaway is the low end torque a Bullitt has over a stock GT. They pull earlier, and just rip to redline after 3K. I had Bullitt mufflers on my GT, very little difference in noise or performance, yet when my wife would drive home and I was in the yard, I could pick up the sound of her car from 1/2 mile out.

John

John,

That is true love brother, My wife would have gotten the v6 pony car and I would have taken the Bullitt, well as it is the wife got the X3 and I got the Bullitt, so it all works out.
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