I had some down time this morning at work and put together my "wish list" for modifications on my 2003 Termy. Thanks to all of you out there who gave your input which helped me make my decision to put together this list. I have made the list in the order that I intend of having everything installed:
1. Bassani X-Pipe w/cats (not taking the chance here in MA of getting pulled over with the off road pipe)
2. Diablo Sport Predator Tuner
3. 2.8" Pulley for the S/C
4. Steggy Stage IV Port and Throttle Body Plenum
I checked into the cost and it looks like it will be about $1600 for a conservative estimated 140 HP gain. I will be doing all the installation myself and I hope to have everything in before the end of this summer. I can't wait to see the dyno numbers!
Should do a lower pulley as well. There is a chart on SVT performance that shows you boost levels of differen't pulley combo's. Don't remember exactly where it is though
If you go over a 2lb lower though, you'll need to get a pulley for your alternator too, you'll over spin it.
Mods sound pretty good though. Update us when your get it all done
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1995 Mustang GT-Heavily Modded-Sold 2003 Ford Lightning-Sold 1997 Saleen-5.4 conversion-Sold 2005 Mustang GT-Torch Red-Sold 2003 Mustang Cobra-Oxford White 2003 4Runner V8 Sport Edition 4X4
that hp number sounds high? 140 hp gain from where you are now? my 03 has TB,cai,hi flow cats, flow masters. 2.80 pulley Lt headers and a tune and made 456rwhp. A ported intake and you are gonna make 409 rwhp + (140fwhp-20%)=112rwhp = 521rwhp. That means a 65 rwhp or 78 fwhp pick up from a ported intake. Thats a little far fetched.
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1988 coupe race car 2700lbs 366rwhp
1965 2+2 fast back 4 speed tri power
1968 gt/cs 347 5 speed
1970 mach 1 428scj 4 speed v code 410 rwhp stock
1990 gt drag car 780hp on motor
1994 gt, 1998 svt cobra
2003 svt cobra 456rwhp
Keep the lower pulley stock til you really want to start modding, it isn't needed YET! I would FOR sure get a used unmarried Predator and save up to $200 dollars! That combo will give you over 500 RWHP with ease!! Hey limp1969 Stiegemeier did a Dyno test on a Bone Stock 03 Cobra and got 374 RWHP 364 TRQ, then the next pulls were simply adding their Blower Port (Not the Plenum) Eaton with the Stock pulley setup(different air filter) generating the same 9 lbs of boost as the first Dyno pulls, it screamed to 422-381, close to 50HP, NICE!!
that hp number sounds high? 140 hp gain from where you are now? my 03 has TB,cai,hi flow cats, flow masters. 2.80 pulley Lt headers and a tune and made 456rwhp. A ported intake and you are gonna make 409 rwhp + (140fwhp-20%)=112rwhp = 521rwhp. That means a 65 rwhp or 78 fwhp pick up from a ported intake. Thats a little far fetched.
The 140 HP I am estimating is at the flywheel that's why I didn't say RWHP. My estimated HP gain is based on each individual mod's HP quoted HP increase, for example:
X Pipe 15-20 HP
Diablo Tune 40 HP
Pulley 17-20 HP
Steggy Port and Plenum 60 HP
The 140 HP I am estimating is at the flywheel that's why I didn't say RWHP. My estimated HP gain is based on each individual mod's HP quoted HP increase, for example:
X Pipe 15-20 HP
Diablo Tune 40 HP
Pulley 17-20 HP
Steggy Port and Plenum 60 HP
I hope this clears things up.
the ratings by a manufacture are not what they seem. If you put a pulley on with no cai or exhaust then install a cai or exhaust that is the numbers they will post. But all together it will not add up the same.
If i added up the hp quotes for the mods I have done on my 9 gt it would be a 300 hp car but its no where close. They ly to sell their products. You can look at what i am saying in rwhp or fwhp it still does not add up. If I did porting on my 03 I would not see the extra power they claim.
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1988 coupe race car 2700lbs 366rwhp
1965 2+2 fast back 4 speed tri power
1968 gt/cs 347 5 speed
1970 mach 1 428scj 4 speed v code 410 rwhp stock
1990 gt drag car 780hp on motor
1994 gt, 1998 svt cobra
2003 svt cobra 456rwhp
the ratings by a manufacture are not what they seem. If you put a pulley on with no cai or exhaust then install a cai or exhaust that is the numbers they will post. But all together it will not add up the same.
If i added up the hp quotes for the mods I have done on my 9 gt it would be a 300 hp car but its no where close. They ly to sell their products. You can look at what i am saying in rwhp or fwhp it still does not add up. If I did porting on my 03 I would not see the extra power they claim.
I agree limp1969, when you put stuff like Catbacks on you feel a little seat in the pants difference but come on you don't get 25 HP from them like claims say!
I will have to disagree though on your feelings about Steg, they will get you the claimed numbers if it takes them weeks of technical assistance to get it dialed in right! This is the best costwise Mod besides pulleys for the Terminator, just looking at pics of their port work and how much they open that Eaton up should convince anyone!
I understand that my estimates are on the high side, one can hope right? I can be realistic here with the expected gains, even if I manage close to 100 HP gain I will be supremely satisfied.
Mods wish list for my 2003 SVT 
