How to get to a 150 hp 12A?
10-07-02, 01:39 AM
#54
Apprentice Guru
Join Date: Oct 2001
Location: Cloud Nine and Peak of God
Posts: 1,425
Likes: 0
Received 0 Likes
on
0 Posts
Sometimes I think there are too many posts about performance not born out by dyno data or track times.
"my car was off that day but when its really tuned and I get a great launch I will get high 14s'!
When I start looking for actual evidence the best I can get is a 150 hp 1984 GSL will get to 0-60mph in 7.6 seconds and pass through the 1/4 trap in 15.6 seconds. Reducing weight significantly and optimal launch and gear changes with luck will get the car down to around 15.2-15.3 seconds. Still waiting for a dyno and track slip which shows anything different.
My daily driver. a Nissan Skyline without mods, can do the 1/4 in 13 seconds flat. So Gen 1 RX-7s have a long way to go before I buy one just for performance!
"my car was off that day but when its really tuned and I get a great launch I will get high 14s'!
When I start looking for actual evidence the best I can get is a 150 hp 1984 GSL will get to 0-60mph in 7.6 seconds and pass through the 1/4 trap in 15.6 seconds. Reducing weight significantly and optimal launch and gear changes with luck will get the car down to around 15.2-15.3 seconds. Still waiting for a dyno and track slip which shows anything different.
My daily driver. a Nissan Skyline without mods, can do the 1/4 in 13 seconds flat. So Gen 1 RX-7s have a long way to go before I buy one just for performance!
10-07-02, 02:28 AM
#55
Old [Sch|F]ool
My math shows that it takes 105hp to make a 2600lb car do a 1/4mi in 17.0 seconds and 80mph. This coincides very neatly with a '79 RX-7 as-tested by practically all magazines I have reviews for. (Screw it if I end a sentence with a preposition!)
That same math also says that if a car weighing 2400lb travels the 1/4mi in 15.1 seconds at 90mph, it is making 130hp.
I would not doubt that if the car was brought down to 2400lb as it goes down the track, 150hp can result in 14-second timeslips. If the car weighs 2750lb (stock GSL with average driver), then it can still do mid-15's.
That same math also says that if a car weighing 2400lb travels the 1/4mi in 15.1 seconds at 90mph, it is making 130hp.
I would not doubt that if the car was brought down to 2400lb as it goes down the track, 150hp can result in 14-second timeslips. If the car weighs 2750lb (stock GSL with average driver), then it can still do mid-15's.
