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LS engine tuning

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#21 (permalink)

01-30-2009, 02:37 AM

Aussie Mike Aussie Mike is offline

CC Member

Join Date: Jan 2001

Location: Sunbury, VIC

Cobra Make, Engine: Rat Rod Racer, LS1 & T56

Posts: 5,391

Not Ranked

Here are my calcs for 3.9:1

@6500 RPM

1st 2.66:1 = 77KMh
2nd 1.78:1 = 115KMh
3rd 1.3:1 = 157KMh
4th 1:1 = 204KMh
5th 0.74:1 = 276KMh
6th 0.50:1 = 410KMh

Cruising @ 100KMh in 6th = approx 1600RPM

Calcs for 4.11:1 diff gears

1st 2.66:1 = 72KMh
2nd 1.78:1 = 109KMh
3rd 1.3:1 = 149KMh
4th 1:1 = 194KMh
5th 0.74:1 = 262KMh
6th 0.50:1 = 389KMh

Cruising @ 100KMh in 6th = approx 1700RPM

These numbers are based on my 315/35/17 rear rubber.

Cheers

__________________
Mike Murphy
Melbourne Australia

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