Stock 1998 Mustang GT HP/TQ? - Ford Mustang Forum
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post #1 of 18 (permalink) Old 11-09-2009 Thread Starter
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Question Stock 1998 Mustang GT HP/TQ?

i know websites say like 225/265 or something, but i'd like the real numbers, preferrably from someone with experience or a dyno'd stock one.

any guesses are appriciated!

silver 98 GT 5 spd;
bbk CAI, bbk o/r h mated to flowmaster 40's..

next: gears or a tuner..

$760 invested and growing..

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post #2 of 18 (permalink) Old 11-09-2009
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yea thats wat they claim but those are just base numbers im sure some one has done a dyno with similar modds than urs.. hope u get ur numbers

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post #3 of 18 (permalink) Old 11-09-2009
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more than 215 i would hope because i raced a guy i know in his 2002 lexus and specs on it show they have 215 hp i dont know about the torque though..i know its bad to race but he never would leave me alone
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post #4 of 18 (permalink) Old 11-09-2009
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The only way to get the exact numbers, would be to put it on a dyno and stop your guess work. You can have two stock 98 GT's, and on the dyno they'll give you two different numbers. It all depends on how well it was maintained, and just how many miles on the clock. If you were close enough, I would put you on the dyno just to get your numbers, Mike. SCT Tuner.
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post #5 of 18 (permalink) Old 11-09-2009
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225 is the base for 98 at the engine. 265 is for the PI cars. Like theyve said, to find out your actual wheel hp youd have to toss it on a dyno.


(Oops its 225 for 98 not 215)
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post #6 of 18 (permalink) Old 11-09-2009
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215 will only be crank horse power. your making more around 180'ish to the wheels.

on hp tv, they did his 'project midnight'-1996 gt manuel and it put 177 at the wheels stock. So figure in that ballpark.

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post #7 of 18 (permalink) Old 11-09-2009
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Quote:
Originally Posted by mad0314 View Post
225 is the base for 98 at the engine. 265 is for the PI cars. Like theyve said, to find out your actual wheel hp youd have to toss it on a dyno.


(Oops its 225 for 98 not 215)
Thats at the crank. so dont be suprised when the numbers are lower on the dyno. I think its like 5-10% loss through the drivetrain.

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post #8 of 18 (permalink) Old 11-09-2009
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I thought it was closer to 10-15%?
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post #9 of 18 (permalink) Old 11-09-2009
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They will vary but the official reading is 225 (up from the 215 of the 96-97's) and 285 on tq (same as the 96-97's). I think it is said that a slight exhaust tweak allows for the extra hp. As has been said, the best way to find out for sure on yours is to strap her to a dyno. The mods are good engines even in first generation form but higher mileage examples will be a bit tired and won't show factory numbers.

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Quote:
Originally Posted by mad0314 View Post
I thought it was closer to 10-15%?
It's typically closer to the 15-20% range depending on manual or automatic trans

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i would say you would put down about 180rwhp but you will never know for sure unless like said before put it on the dyno
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my 98 GT mostly stock, just exhaust and intake put 222 to the wheels. with heads and cams and a few other small mods I put down 305RWHP! Also depends on where you are! Temp, and humidity can play a big role in performance (San Diego CA.)
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How much do dyno test usually cost?

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-1998 Ford Mustang GT (4.6L 2V V8 Automatic, PI Head Swap, 4:10 Gears, 78MM BBK Throttle Intake, CAI, Flowmaster American Thunder Catback Exhaust, A/C Replacement Pulley and a tune.) Summer Car:kooky: Ran 13.84s 1/4 mile with street tires.
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Happy 1 year! dyno run costs vary from shop to shop but the shop I go to is $50 for a couple runs(no tuning) Check out your local tuners and get an idea what they charge.

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Definitley get a dyno tune for your mustang.
I belive a 98 GT stock rwhp numbers are more like 190-200 rwhp
and 230-240 rwtq but,every mustang is indeed different.
Dyno your mustang and find out where you are at!
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