please don't laugh too hard, remember i'm a noob

[biscoiv]

i recently bought my first mustang a 03 GT conv. i know it is a 4.6, but what size block is that in CI. also how can you tell if it is the high output motor. i'm getting ready to start buying some parts to improve performance, but want to make sure i'm getting the right stuff

[BEC]

i also just bought a 03 gt. i am going to buy a jlt cold air intake next week for my first upgrade

[GodFather]

4.6 = 281 CI

[Onesmokin98]

the 4.6 is a 281ci motor. and since you have the 03 you have the more powerful motor, the 96-98 GT's were rated at 220hp, after 99 they changed the cylinder heads, upping the power to 260hp.

[Onesmokin98]

damn, you beat me to it!

[cruisemissile]

the 4.6 is a 281ci motor. and since you have the 03 you have the more powerful motor, the 96-98 GT's were rated at 220hp, after 99 they changed the cylinder heads, upping the power to 260hp.

I thought the '96-'98's were rated at 215hp?

[Onesmokin98]

Well they are rated at both, depending on what month yours was produced..i think it went up to 220 sometime in October of 97

[Onesmokin98]

Either way, they are slow..and when I first for my bullitt I noticed the difference instantly

[biscoiv]

thanx for the help

[Onesmokin98]

Sure, thats what "family" is all about

[GodFather]

True story. :cheers:

[cruisemissile]

Well they are rated at both, depending on what month yours was produced..i think it went up to 220 sometime in October of 97

Ahh, you learn something new everyday! Thanks!

[Onesmokin98]

^no problem..my advice for your car...wait till your motor blows and get the 99+ motor

[91GT347]

^no problem..my advice for your car...wait till your motor blows and get a 302 or 351 in there

There. Fixed it for you. lmao j/k

[SonicBlue]

You can find a lot of specs and other info on the 2003's here (http://www.mustangspecs.com/years/03.shtml).

What color did you get? You can see mine here (http://mustangmafia.com/forum/vbgarage.php?do=view&id=1454).

[StevetheAztec]

96-97 = 215 HP
98 = 225 HP same as the 5.0

On the nPI cars, a PI intake/cam swap will put you quite a bit closer to the 260 HP the 99+ cars make. The heads aren't as much of a bottleneck as they're made out to be.

[biscoiv]

i went with true blue(i think anyhow)

[biscoiv]

nevermind, now that i've looked at the stock colors i think it is the sonic blue metallic. the guy i bought it off of called it true blue for some reason

[juk08gt]

Are the 07+ rated any higher or are they 300hp at the flywheel on average?

[biscoiv]

shouldn't have corrected myself, it is true blue metallic

[biscoiv]

no idea, i'm a noob

[Lazer Red 99 GT]

The main reason people like doing the PI swap is because the PI heads on the NPI block will raise the compression ratio as well as you get the better PI heads and intake. My buddy did a PI swap on his old 98 and installed VT stage 1 cams, longtubes and the heads/intake and put down 260+ through an automatic. He picked up like 70hp over stock.

[Reaper]

The main reason people like doing the PI swap is because the PI heads on the NPI block will raise the compression ratio as well as you get the better PI heads and intake. My buddy did a PI swap on his old 98 and installed VT stage 1 cams, longtubes and the heads/intake and put down 260+ through an automatic. He picked up like 70hp over stock.

Also the PI heads flow a lot better than the NPI.

[TripleBlack99SVT]

Are the 07+ rated any higher or are they 300hp at the flywheel on average?

I believe 05+ are rated 300hp. And pretty much any rating published by Ford, like the ones mentioned, are at the flywheel, not RWHP.

[1bad67mustang]

what was the horsepower on the 94s and 95s.

[GodFather]

what was the horsepower on the 94s and 95s.215