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Andy San
18th March 2010, 01:59 PM
I've entered the time attack in June at eastern creek, as I've never been there before. any input on gearing or suspension rates for the track would be useful. I'm running 4.77 diff gears and I'm unsure as to whether or not they will be too short for the long front straight.

Any info would be useful

takai
18th March 2010, 02:07 PM
Andy, jump on here: http://www.ipraforum.com.au/

They will give you all the goss on it. Just remember to say you are an Unders car :)

charged
18th March 2010, 06:50 PM
I've entered the time attack in June at eastern creek, as I've never been there before. any input on gearing or suspension rates for the track would be useful. I'm running 4.77 diff gears and I'm unsure as to whether or not they will be too short for the long front straight.

Any info would be useful

You should be right, I used the Peter odgen gear calc http://racingdownloads.com/racing_software-22.html



GearCalc v2.0.0.1 Copyright 2001, Peter Ogden
Gear Ratio, Speed and RPM Calculator

Gear set: Toyota T50 Standard
Gear 1 2 3 4 5 Final
Ratios: 3.587 2.022 1.384 1.000 0.861 4.770

RPM Limit: 8000
RPM @Peak Power: 7500
Tyre Size: 205/50 x 15
Tyre Diameter: 586.00 mm
Tyre Circumference: 1840.97 mm


Gear Km/h per 1000 RPM Km/h @7500 RPM Km/h @8000 RPM
--------------------------------------------------------
1 6.46 48 52
2 11.45 86 92
3 16.73 125 134
4 23.16 174 185
5 26.90 202 215

Km/h RPM (in Gears)
-------------------------------------------------
1 2 3 4 5
-------------------------------------------------
10 1549 873 598 432 372
20 3098 1746 1195 864 744
30 4647 2620 1793 1296 1115
40 6196 3493 2391 1727 1487
50 7745 4366 2988 2159 1859
60 5239 3586 2591 2231
70 6112 4184 3023 2603
80 6985 4781 3455 2974
90 7859 5379 3887 3346
100 5977 4318 3718
110 6574 4750 4090
120 7172 5182 4462
130 7770 5614 4834
140 6046 5205
150 6478 5577
160 6909 5949
170 7341 6321
180 7773 6693
190 7064
200 7436
210 7808

Gear Change RPM drop (change @7500) RPM drop (change @8000)
-------------------------------------------------------------
1 -> 2 -3272 (to 4228) -3490 (to 4510)
2 -> 3 -2366 (to 5134) -2524 (to 5476)
3 -> 4 -2081 (to 5419) -2220 (to 5780)
4 -> 5 -1043 (to 6457) -1112 (to 6888)

Andy San
18th March 2010, 07:05 PM
Thanks for that, lucky it doesn't say how much road I need to reach those speeds... Haha

takai
19th March 2010, 09:55 AM
From what Gav was saying, your car produces about the same as what mine did when i was back in NSW. Now at Wakefield i would commonly be matched up against other guys with similar power outputs and gear ratios who ran fine at EC.... so by extrapolation.... she'll be right mate :P

pen15
24th March 2010, 08:31 PM
I've entered the time attack in June at eastern creek, as I've never been there before. any input on gearing or suspension rates for the track would be useful. I'm running 4.77 diff gears and I'm unsure as to whether or not they will be too short for the long front straight.

Any info would be useful

hey mate what time attack event have you entered in i wouldn't mind hitting a grip race as my setup isn't all that bad as a grip car and sounds like my setup is very closely matched to yours

Andy San
25th March 2010, 09:51 AM
i've entered the superlap time attack in may, but i think the class i entered is now full.