Oh no....

[thundercatz1]

A stock PI Mustang on a 75 shot is only about 310-320 rwhp. Is that gonna be enough for a 12.3?? Even a tuned 100 shot will only make about 350whp, and that car is heavy...

Its only a 140 lbs heaver in stock trim compared to a hard top.....

On Mustangforums.com

Weight - Your basic 5 speed coupe without driver weights 3250lbs. So with an average driver weighing about 180lbs that puts your race weight at 3430lbs. At that weight and a power to weight ratio of .075 you would need 258RWHP to hit 12’s. Power to weight is the power of your car (rear wheel) divided by race weight of the car. Using my car when I broke into the 12’s first time I was making 246RWHP and had a race weight of 3250lb, which worked out to a .075 power to weight ratio or .075RWHP per pound of the car. From what I’ve seen a car can get into the 12s with a .075 to .080 P/W ratio. So if your race weight is 3430lbs then 3430 * .075 = 257.25RWHP. As long as you keep this ratio in the .075 to .080 range you are fine plus keep in mind you can drop weight instead of adding power. An example of this is a car with a 3000lb race weight could break into the 12s with 225RWHP (close to stock power on a GT).

Rebuttle anyone?

[David88vert]

Its only a 140 lbs heaver in stock trim compared to a hard top.....

On Mustangforums.com

Weight - Your basic 5 speed coupe without driver weights 3250lbs. So with an average driver weighing about 180lbs that puts your race weight at 3430lbs. At that weight and a power to weight ratio of .075 you would need 258RWHP to hit 12’s. Power to weight is the power of your car (rear wheel) divided by race weight of the car. Using my car when I broke into the 12’s first time I was making 246RWHP and had a race weight of 3250lb, which worked out to a .075 power to weight ratio or .075RWHP per pound of the car. From what I’ve seen a car can get into the 12s with a .075 to .080 P/W ratio. So if your race weight is 3430lbs then 3430 * .075 = 257.25RWHP. As long as you keep this ratio in the .075 to .080 range you are fine plus keep in mind you can drop weight instead of adding power. An example of this is a car with a 3000lb race weight could break into the 12s with 225RWHP (close to stock power on a GT).

Rebuttle anyone?

Sure, here's your rebuttle:

The only way that YOU are going to be able to do 12's with 260hp in that convertible Mustang of yours is if you have someone FAST tow you down the track. Or you could try a FLYING 1/4 (not a dig), and you might get to the 12's then - assuming you start from your top speed.


Your car is a 2000 GT convertible, right? If so, curb weight is 3375 lbs stock, and 260 bhp.
http://www.miracerros.com/mustang/2000_specs.html

A rough calcuation on stock flywheel hp should be about a 14.5 on good tires, on a good track.
With the hp upped to 260 rwhp, you should see around a 13.7.
To make a 12.9, you would need a good launch and cut your weight from the car to keep it at 3375, and about 310 RWHP or 360 bhp.
I figured for a 17% driveline loss.

[boosted347]

Sure, here's your rebuttle:

The only way that YOU are going to be able to do 12's with 260hp in that convertible Mustang of yours is if you have someone FAST tow you down the track. Or you could try a FLYING 1/4 (not a dig), and you might get to the 12's then - assuming you start from your top speed.


Your car is a 2000 GT convertible, right? If so, curb weight is 3375 lbs stock, and 260 bhp.
http://www.miracerros.com/mustang/2000_specs.html

A rough calcuation on stock flywheel hp should be about a 14.5 on good tires, on a good track.
With the hp upped to 260 rwhp, you should see around a 13.7.
To make a 12.9, you would need a good launch and cut your weight from the car to keep it at 3375, and about 310 RWHP or 360 bhp.
I figured for a 17% driveline loss.

plus you gotta be able to launch a car, and speaking from experience houston, owning a convert myself, your stock suspension is way to soft and has to much body roll/ horrible weight transfer to launch correctly, also if you arent on slicks or at least DRs you arent gonna see low 12s let alone prob high 12s but hey only time and a trip to the track will tell all, go for it i will be thoroughly impressed if you cut a 12.3

[japan4racing]

What makes you think I cant go higher? stock 2v motors can handle 100 shot untuned but mine will be.

No doubt a 2v will hold a 100 shot...infact all you gotta do is load the factory tune and spray away, monitor your a/f, and adjust the fuel pill untill you have a satisfactory afr and you are in business! the reason I dont think you can hit 12.3 or lower is coming up below

A stock PI Mustang on a 75 shot is only about 310-320 rwhp. Is that gonna be enough for a 12.3?? Even a tuned 100 shot will only make about 350whp, and that car is heavy...

Hey Chris, remember what I just told you above? My car with the bolt-ons I have probably makes, in the neighborhood, of about 290-310whp. last week i ran 13.11@109 with an awful 2.1 60' just as it sits on any given day...no drag radials, no slicks, no aggressive tune...just a daily driver stang. Lets just say you car was making 260whp(which we know its not unless you have considerable bolt ons) and you spray the 75 shot and it makes....310whp with rediculous torque.....I do not see the car going faster than 12.5 on a slick..and mph will be streched out...I dare even to say you will trap 103-105ish on a 12.5 with slicks a 75 shot. Im not trying to rain on your parade or talk shit about you...Im just being realistic.

Its only a 140 lbs heaver in stock trim compared to a hard top.....

On Mustangforums.com
Weight - Your basic 5 speed coupe without driver weights 3250lbs.

I weigh 220lbs and last week my car with me in it weighed 3616lbs...thats 146lbs heavier than you have heard

So with an average driver weighing about 180lbs that puts your race weight at 3430lbs.

even at 180lbs a typical 5 speed weighs at least 3570ish...add the extra 140 and you are at 3710!

Rebuttle anyone?

so you think with a car weighing 3700lbs and making 310whp its gonna run low 12's? I got bad news for ya....my 93 civic dx with ~300whp ran 12.20 on slicks and it weighed 2600lbs....a 3700lb sled with the same whp is not gonna run low 12's...mid to high 12's are in your future if you can short time it.