ERStettin
10-22-2005, 07:57 PM
I went to Cedar Falls Raceway today. I have been there the last three weekends. Last weekend I was running the 4.56 gear. This weekend the only thing I changed was swapping the 4.56 for a 4.88. The weather was great both weekends though there was a head wind of about 10 knots or so today.
I made three passes last weekend with the 4.56s’ and one of them was my best pass ever. Here are the passes from last weekend.
LAST WEEKEND
FIRST PASS
R/T - .504
60’ - 1.445
330 - 4.395
1/8 - 6.848
MPH - 100.97
1000 - 8.986
1/4 - 10.782
MPH - 125.87
SECOND PASS
R/T - .520
60’ – 1.483
330 – 4.449
1/8 – 6.898
MPH – 100.65
1000 – 9.028
1/4 -10.811
MPH – 126.65
THIRD PASS
R/T - .343
60’ - 1.447
330 – 4.397
1/8 – 6.842
MPH – 100.61
1000 – 8.969
1/4 – 10.754
MPH – 126.51
As you can see, the MPH and ET was better last weekend with the 4.56’s but the 60fts’ were MUCH better this weekend with the 4.88s’. I usually crossed the traps at 7,000 rpm or so with the 4.56’s and today I was crossing about 7,300 to 7,400 or so.
What do you think I should do here? Should I swap back to the 4.56 gears or should I keep the 4.88s’ in the car and give them another chance during a day with no headwind? I am kind of wondering if the 4.88’s are too much gear for my set up? My set up only makes good power to about 7,000 rpm. After that, it falls off a cliff. I was hoping the decrease in 60ft time with the 4.88 would help offset what I would lose up top but it doesn’t look too promising. I did manage to get a 10.76@123.93. I guess I am stumped on which way to go. Thanks in advance to all who reply.
THIS WEEKEND
FIRST PASS
R/T…...130
60’……1.489
330…...4.503
1/8……6.994
MPH…98.77
1000…9.141
1 / 4….10.950
MPH…122.73
SECOND PASS
R/T…...407
60’……1.423
330…...4.399
1/8……6.876
MPH…98.82
1000…9.012
1 / 4….10.823
MPH…123.06
THIRD PASS
R/T…...171
60’……1.409
330…...4.391
1/8……6.868
MPH…98.12
1000…9.010
1 / 4….10.822
MPH…123.29
FOURTH PASS
R/T…..-.121
60’……1.437
330…...4.435
1/8……6.914
MPH…98.37
1000…9.055
1 / 4….10.868
MPH…123.17
FIFTH PASS
R/T…...095
60’……1.413
330…...4.368
1/8……6.835
MPH…99.11
1000…8.963
1 / 4….10.767
MPH…123.93
I made three passes last weekend with the 4.56s’ and one of them was my best pass ever. Here are the passes from last weekend.
LAST WEEKEND
FIRST PASS
R/T - .504
60’ - 1.445
330 - 4.395
1/8 - 6.848
MPH - 100.97
1000 - 8.986
1/4 - 10.782
MPH - 125.87
SECOND PASS
R/T - .520
60’ – 1.483
330 – 4.449
1/8 – 6.898
MPH – 100.65
1000 – 9.028
1/4 -10.811
MPH – 126.65
THIRD PASS
R/T - .343
60’ - 1.447
330 – 4.397
1/8 – 6.842
MPH – 100.61
1000 – 8.969
1/4 – 10.754
MPH – 126.51
As you can see, the MPH and ET was better last weekend with the 4.56’s but the 60fts’ were MUCH better this weekend with the 4.88s’. I usually crossed the traps at 7,000 rpm or so with the 4.56’s and today I was crossing about 7,300 to 7,400 or so.
What do you think I should do here? Should I swap back to the 4.56 gears or should I keep the 4.88s’ in the car and give them another chance during a day with no headwind? I am kind of wondering if the 4.88’s are too much gear for my set up? My set up only makes good power to about 7,000 rpm. After that, it falls off a cliff. I was hoping the decrease in 60ft time with the 4.88 would help offset what I would lose up top but it doesn’t look too promising. I did manage to get a 10.76@123.93. I guess I am stumped on which way to go. Thanks in advance to all who reply.
THIS WEEKEND
FIRST PASS
R/T…...130
60’……1.489
330…...4.503
1/8……6.994
MPH…98.77
1000…9.141
1 / 4….10.950
MPH…122.73
SECOND PASS
R/T…...407
60’……1.423
330…...4.399
1/8……6.876
MPH…98.82
1000…9.012
1 / 4….10.823
MPH…123.06
THIRD PASS
R/T…...171
60’……1.409
330…...4.391
1/8……6.868
MPH…98.12
1000…9.010
1 / 4….10.822
MPH…123.29
FOURTH PASS
R/T…..-.121
60’……1.437
330…...4.435
1/8……6.914
MPH…98.37
1000…9.055
1 / 4….10.868
MPH…123.17
FIFTH PASS
R/T…...095
60’……1.413
330…...4.368
1/8……6.835
MPH…99.11
1000…8.963
1 / 4….10.767
MPH…123.93