Got a LT1....
ORIGINAL: SilverBullet5.0
If you have a GT with just exhaust, youre actually probably puttin about 220-225 to the wheels
If you have a GT with just exhaust, youre actually probably puttin about 220-225 to the wheels
You need to do your homework. 99-04 mustangs come with 260 at the flywheel,up for debate if that is underrated, typical 99-04 mustangs put anywhere 223-228 to the ground through a manual tranny. the 96-98 4.6l had power issues, 190ish the ground if lucky. You can call my bluff all you want, and I can't prove it because I can't find my dyno sheet. But I am sure you look around you will find that my number is not impossible and not uncommon, plus I am sure other people will vouch for the power output of a 99-04 4.6l stang with a manual tranny. I recall a recent post about this very issue and went on for over 8 pages.
PHRM recently did a build up on a 99-04 mustang gt. he is the link to:
Dyno Chart that includes build up
Article on build up
Lower your BS flag your wrong.
Dyno Chart that includes build up
Article on build up
Lower your BS flag your wrong.
ok soooo the mustang they dynod made 225hp to the wheels. so ill raise my rating of what i think you have to the wheels to 130. unless you have headers (and good headers at that), catless x-pipe/h-pipe and a great rear section exhaust, your not going to make any more than 5-10hp. Just because you have a V8 doesnt mean your going to gain that much hp. the 99-04 GT's arent horribly restricted in the exhaust area to begin with (basing this on a 5.0 with aftermarket headers/intake/full exhaust makes anywhere from 35-40. You have a catted x pipe, and a "mid level" rear section exhaust, your not gaining that much at all. You "lost" your dyno sheet? i dunno about anybody else but i framed my dyno sheet, just cuz it cost me 50 bucks for that piece of paper. Post your dyno sheet afetr u get yer car dynod again, i bet you only make 230, 235 if your lucky.
Actually I found it today in the glove box of my car. I have to make a correction though, 223.9hp 26something tq to the wheels, could have swore it was 226, my bad. I will try and get it posted tomorrow.
You can't base a 4.6l OHC with 260fwhp on a 5.0 pushrod with maybe 220fwhp, they are two different animals.
Magnaflow catted x is good for about 10hp to the wheels. Couple that with thier catback and say that adds 5 (which I am sure it adds more), I am at 239 now, 10000 more miles on it, synthetic oil and an aftermarket filter, 245 is not that far fetched. Perhaps I will blow some of my gear money and dyno this weekend, I hope for 240 and above, anything under and I will be dissapointed, but I don't see that happening.
Umm and the 99-04GT are retricted in the exhaust area, the manifolds flow as much as a good pair of shorties, but the rear section is the culprit. I am not saying it is bad but a nice rear section like a Magnaflow or Bassani really helps.
Get some seat time in 99-04GT before you start telling me what my car has and what bolt-ons do for it. I am suprised no one has chimned i on this yet, i guess we 99-04GT owners are tired of telling people what we have and not being believed.
You can't base a 4.6l OHC with 260fwhp on a 5.0 pushrod with maybe 220fwhp, they are two different animals.
Magnaflow catted x is good for about 10hp to the wheels. Couple that with thier catback and say that adds 5 (which I am sure it adds more), I am at 239 now, 10000 more miles on it, synthetic oil and an aftermarket filter, 245 is not that far fetched. Perhaps I will blow some of my gear money and dyno this weekend, I hope for 240 and above, anything under and I will be dissapointed, but I don't see that happening.
Umm and the 99-04GT are retricted in the exhaust area, the manifolds flow as much as a good pair of shorties, but the rear section is the culprit. I am not saying it is bad but a nice rear section like a Magnaflow or Bassani really helps.
Get some seat time in 99-04GT before you start telling me what my car has and what bolt-ons do for it. I am suprised no one has chimned i on this yet, i guess we 99-04GT owners are tired of telling people what we have and not being believed.



The last stock LT1 I saw on a dyno was making 275/285. We havent had them down to the dyno lately so we arent sure after all the mods.