Track tonight
Thread Starter
Race Director
Joined: Mar 2004
Posts: 12,634
Likes: 15
From: IL, Chicago area.
St. Jude Donor '14-'15-'16
Track tonight
Well took it to the track tonight for a personal best, I cant get my 60ft time below a high 1.8X or I think I could go into the 11's finally.
R/T: .221
60' : 1.866
330: 5.182
1/8: 7.897
MPH: 89.23
1000: 10.219
1/4: 12.162
MPH: 116.68
Not to shabby for my baby cam I guess.
R/T: .221
60' : 1.866
330: 5.182
1/8: 7.897
MPH: 89.23
1000: 10.219
1/4: 12.162
MPH: 116.68
Not to shabby for my baby cam I guess.
Le Mans Master
Joined: Jun 2003
Posts: 9,251
Likes: 217
From: 2007 Nat'l Corvette Challenge 11.50 index Champ. New Jersey
Based on your mods, you should be in the upper 10's (on ET Streets)...No offense at all meant.
Piloted right, you could see 11.4-11.5 on street tires.
Back to your run, your mph is low. You should be shifting at redline each shift & shift super fast!
Ron
Piloted right, you could see 11.4-11.5 on street tires.
Back to your run, your mph is low. You should be shifting at redline each shift & shift super fast!
Ron
Le Mans Master
Joined: Oct 2003
Posts: 6,126
Likes: 19
From: Streamwood illinois
todd gimme that car for one pass it'll go 11s 
You've got 50 RWHP on me yet im trapping 118.5 and going 11s. its all in the burnout. The 1.86 isnt that bad but 1.7s should be easyily attainable.
Dave
You've got 50 RWHP on me yet im trapping 118.5 and going 11s. its all in the burnout. The 1.86 isnt that bad but 1.7s should be easyily attainable.Dave
Thread Starter
Race Director
Joined: Mar 2004
Posts: 12,634
Likes: 15
From: IL, Chicago area.
St. Jude Donor '14-'15-'16
hmmmm well there was a lingenfelter maggie car there that was an auto, he has 3.42 gears an consistent 1.7X 60ft times, he was running 12.3XX's all day at about 110mph. His car was 412rwhp and 404rwtq.
Any ideas why we were both so slow then?
Any ideas why we were both so slow then?
Racer
Joined: Sep 2005
Posts: 429
Likes: 0
From: lincoln nebraska
todd, i posted earlier but as i said they moderate my other name and it takes a week for my posts. I make 50 less RWHP yet am .5 and 4 mph faster then you w/ only a 1.7 60'. Its all in the shifts and launch. I bet you let me take 2 passes in your car and i'll go 11s. Your MPH bothers me somewhat though. You should still trap 118-119 at least like me if now higher. Id like to put my scanner on it again and maybe my wideband.
ANother reason I wanted you to get that dynojet run file was so i could overlay it over my graph to look at the curves. Its not about peak HP its about power under the curve. YOu may peak way more then me, but it could be for such an insignifigant amount of time to render it useless on a track.
Dave
ANother reason I wanted you to get that dynojet run file was so i could overlay it over my graph to look at the curves. Its not about peak HP its about power under the curve. YOu may peak way more then me, but it could be for such an insignifigant amount of time to render it useless on a track.
Dave
Thread Starter
Race Director
Joined: Mar 2004
Posts: 12,634
Likes: 15
From: IL, Chicago area.
St. Jude Donor '14-'15-'16
Look at my dyno here : http://forums.corvetteforum.com/show...2&forum_id=108
and see where I make peak hp (6100ropm). I was talking with my buddy Dave (TTvert) and he told me I should be shifting beyond 6100rpm where I peak out.
I'm a track novice as you can probably tell and and looking for tips to get better times. My car has an aluminum flywheel and revs quickly but also loses revs when the clutch is in for the same reason. So where should I be shifting?
and see where I make peak hp (6100ropm). I was talking with my buddy Dave (TTvert) and he told me I should be shifting beyond 6100rpm where I peak out.
I'm a track novice as you can probably tell and and looking for tips to get better times. My car has an aluminum flywheel and revs quickly but also loses revs when the clutch is in for the same reason. So where should I be shifting?
Racer
Joined: Sep 2005
Posts: 429
Likes: 0
From: lincoln nebraska
read this todd. http://mclements.net/mrc-PowerTorque.html i cant find the shift point calculator right now but looking at my dynosheet you are up on me hp/tq wise the entire band. I peak at 6100 ish too and if i dont shift at 6500 it'll slow down and lose a few MPH. Ditto if i go above that to 7k.
my dyno sheet:
Dave
my dyno sheet:
Dave
Last edited by TT_Vert-; Oct 23, 2005 at 12:10 AM.
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Le Mans Master
Joined: Oct 2003
Posts: 6,126
Likes: 19
From: Streamwood illinois
it has more to do w/ using the most powerband based on hp/tq and gearing then actuall hp drop. You need to figure out at what point you are not accelerating better with the numerical gearing advantage vs. loss of hp. IE you may be making more actual torque based on gearing by reving higher and in turn putting yourself into a better spot in the powerband in the next gear. The loss of shifting a bit out of your powerband may be way offset by being at a better part of the band in the next gear. I gotta find the site I was ooking at but I just try many different shift points based on trans and rear gearing setup at the time.
Dave
Dave
Racer
Joined: Sep 2005
Posts: 429
Likes: 0
From: lincoln nebraska
found one todd http://www.bgsoflex.com/shifter.html
# Finding Best Shift Placement Points For Ratio 2.66 to 1.78: Found optimum shift RPM at 6493, which achieves maximum area under horsepower curve, and lowers the RPM to 4345 after shift
# Finding Best Shift Placement Points For Ratio 1.78 to 1.30: Found optimum shift RPM at 6497, which achieves maximum area under horsepower curve, and lowers the RPM to 4745 after shift
# Finding Best Shift Placement Points For Ratio 1.30 to 1.00: Found optimum shift RPM at 6500, which achieves maximum area under horsepower curve, and lowers the RPM to 5000 after shift
# Finding Best Shift Placement Points For Ratio 1.78 to 1.30: Found optimum shift RPM at 6497, which achieves maximum area under horsepower curve, and lowers the RPM to 4745 after shift
# Finding Best Shift Placement Points For Ratio 1.30 to 1.00: Found optimum shift RPM at 6500, which achieves maximum area under horsepower curve, and lowers the RPM to 5000 after shift
Thread Starter
Race Director
Joined: Mar 2004
Posts: 12,634
Likes: 15
From: IL, Chicago area.
St. Jude Donor '14-'15-'16
I got the same so shift 6400 to 6500 to stay in powerband after each shift. Cool thanks. 
Maximizing the Area Under the Horsepower Curve:
Finding Best Shift Placement Points For Ratio 2.66 to 1.78:
Found optimum shift RPM at 6493, which achieves maximum area under horsepower curve, and lowers the RPM to 4345 after shift
Finding Best Shift Placement Points For Ratio 1.78 to 1.30:
Found optimum shift RPM at 6497, which achieves maximum area under horsepower curve, and lowers the RPM to 4745 after shift
Finding Best Shift Placement Points For Ratio 1.30 to 1.00:
Found optimum shift RPM at 6500, which achieves maximum area under horsepower curve, and lowers the RPM to 5000 after shift
Finding Best Shift Placement Points For Ratio 2.66 to 1.78:
Found optimum shift RPM at 6493, which achieves maximum area under horsepower curve, and lowers the RPM to 4345 after shift
Finding Best Shift Placement Points For Ratio 1.78 to 1.30:
Found optimum shift RPM at 6497, which achieves maximum area under horsepower curve, and lowers the RPM to 4745 after shift
Finding Best Shift Placement Points For Ratio 1.30 to 1.00:
Found optimum shift RPM at 6500, which achieves maximum area under horsepower curve, and lowers the RPM to 5000 after shift