Hey guys.
I have just returned form another day at Heathcoate Raceway. It was a fantastic day, racing against quite a few of my mates.... we all had a kik ass time.
I set out to improve my 60ft time this time round in the hope for a quicker overall result, I managed some good launches before the rain set in.
I was hoping to get some extra opinions for future gear ratio changes.
The last time I ran, I used standard street rubber 205x15.
This time around I used a lower profile tyre, softer compound.. and boy there was some good grip out there. It was a 205x15 50. The overall height of the rubber was about 1-1.5" less then the previous rubber.
This made the final drive shorter.
Here are some comparisons between the two.
My times are the following:
Standard Height / Lower profile
2.20/ 2.24 60ft
6.3/ 6.38 330ft
9.83/ 9.87 660ft
69.76/ 71.70 660mph
12.83/ 12.84 1000ft
15.365/ 15.365 ET
88.92/ 90.11 mph
temp 29.9/ 23.1
Standard Height / Lower profile
2.30/ 2.11 60ft
6.37/ 6.31 330ft
9.98/ 9.85 660ft
69.25/ 71.13 660mph
12.87/ 12.86 1000ft
15.44/ 15.40 ET
85.93/ 89.37 mph
Standard Height / Lower profile
2.18 60ft
x/ 6.4 330ft
x/ 9.9 660ft
x/ 69.67 660mph
x/ 12.92 1000ft
x/ 15.45 ET
x/ 88.95 mph
Standard Height / Lower profile
2.35/ 2.32 60ft
6.4/ 6.4 330ft
10.02/ 10.0 660ft
70.08/ 69.61 660mph
13.006/ 13.005 1000ft
15.50/ 15.55 ET
89.96/ 88.22 mph
The lower 60ft time did not seem to help as much as I thought it would.
All gear changes were done at the same point.. however, I was probably changing slower today (ie. Lower profile runs) as my main focus was getting a good 60ft time, without destroying my T5. Engine/weight the same on both days.
The car is an EA Ghia, full electrics, LPG etc… nice and heavy.
It is a 5 speed, with a 3.23 final drive.
Do you guys think the car will be better off with a higher set of gears (assuming traction off the line is not as issue)… I’m thinking 3.7’s?
Opinions?
I have just returned form another day at Heathcoate Raceway. It was a fantastic day, racing against quite a few of my mates.... we all had a kik ass time.
I set out to improve my 60ft time this time round in the hope for a quicker overall result, I managed some good launches before the rain set in.
I was hoping to get some extra opinions for future gear ratio changes.
The last time I ran, I used standard street rubber 205x15.
This time around I used a lower profile tyre, softer compound.. and boy there was some good grip out there. It was a 205x15 50. The overall height of the rubber was about 1-1.5" less then the previous rubber.
This made the final drive shorter.
Here are some comparisons between the two.
My times are the following:
Standard Height / Lower profile
2.20/ 2.24 60ft
6.3/ 6.38 330ft
9.83/ 9.87 660ft
69.76/ 71.70 660mph
12.83/ 12.84 1000ft
15.365/ 15.365 ET
88.92/ 90.11 mph
temp 29.9/ 23.1
Standard Height / Lower profile
2.30/ 2.11 60ft
6.37/ 6.31 330ft
9.98/ 9.85 660ft
69.25/ 71.13 660mph
12.87/ 12.86 1000ft
15.44/ 15.40 ET
85.93/ 89.37 mph
Standard Height / Lower profile
2.18 60ft
x/ 6.4 330ft
x/ 9.9 660ft
x/ 69.67 660mph
x/ 12.92 1000ft
x/ 15.45 ET
x/ 88.95 mph
Standard Height / Lower profile
2.35/ 2.32 60ft
6.4/ 6.4 330ft
10.02/ 10.0 660ft
70.08/ 69.61 660mph
13.006/ 13.005 1000ft
15.50/ 15.55 ET
89.96/ 88.22 mph
The lower 60ft time did not seem to help as much as I thought it would.
All gear changes were done at the same point.. however, I was probably changing slower today (ie. Lower profile runs) as my main focus was getting a good 60ft time, without destroying my T5. Engine/weight the same on both days.
The car is an EA Ghia, full electrics, LPG etc… nice and heavy.
It is a 5 speed, with a 3.23 final drive.
Do you guys think the car will be better off with a higher set of gears (assuming traction off the line is not as issue)… I’m thinking 3.7’s?
Opinions?