Computer program verifies LPE article in C&D
Thread Starter
Safety Car
Joined: Oct 2001
Posts: 4,026
Likes: 0
From: Renaissance Festival TAZ the Wolfdog (R.I.P.)
Computer program verifies LPE article in C&D
I've got a drag racing program called quarter jr., ver.3.2, and I plugged in the knowns and guessed at the variables using the C&D article and got using 0 rollout
60'________2.28
0-60_______3.79
0-100______7.73
1/8mi______7.86@99.2mph
1/4mi______11.78@125.6 mph
Variables assumed:
temp______70*F
humid_____70%
shift@_____6200rpm
altitude____6' above sea level (@HRP)
launch@___2600rpm
traction____street tires
weight_____3400 lbs. w/ driver
known:
peak hp____490@6000rpm
So, the 126 mph trap speed is in the ballpark
Sorry for the dupe, but I wanted everyone to see this and the other is buried on p.3
:cheers:
60'________2.28
0-60_______3.79
0-100______7.73
1/8mi______7.86@99.2mph
1/4mi______11.78@125.6 mph
Variables assumed:
temp______70*F
humid_____70%
shift@_____6200rpm
altitude____6' above sea level (@HRP)
launch@___2600rpm
traction____street tires
weight_____3400 lbs. w/ driver
known:
peak hp____490@6000rpm
So, the 126 mph trap speed is in the ballpark
Sorry for the dupe, but I wanted everyone to see this and the other is buried on p.3
:cheers:
Melting Slicks
Joined: Dec 2000
Posts: 2,118
Likes: 2
Re: Computer program verifies LPE article in C&D (Steve02C5)
Steve02C5...is the "known peak hp" BHP or RWHP....it makes a huge difference....I've never seen a 415rwhp C5 on the Forum turn 126 mph on street tires. I use the "ET Calculator" http://car.race-cars.net/calculators/et_calculator.html and it states that a 3400 lb car would need at least 530 RWHP to go 126 in the quarter....the Magnuson with 415RWHP could only do 116mph, which sounds about right The 11.7 sec is possible with good temps and perfect track conditions.....the 126 mph is at least 10mph too high. What time and speed do you turn with the 465rwhp setup ? My guess would be about 11.3@120. Post a time slip. :cheers:
BlackSun......525rwhp will turn about 10.9@125, with good tires and track conditions.
BlackSun......525rwhp will turn about 10.9@125, with good tires and track conditions.
Thread Starter
Safety Car
Joined: Oct 2001
Posts: 4,026
Likes: 0
From: Renaissance Festival TAZ the Wolfdog (R.I.P.)
Re: Computer program verifies LPE article in C&D (HIGHRPM)
490 flywheel hp. ~421rwhp, I know from past experience that the qtr. jr program is fairly accurate because I used to compare it with my timeslips (approx. 50) and it was never off by 10mph.
As for my car, it still has tuning issues. :cry
As for my car, it still has tuning issues. :cry
