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27-07-2006, 11:24 AM
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FF.Com.Au Hardcore
Join Date: Apr 2006
Posts: 784
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got the old girl booked in next tuesday to get some 3.89 diff gears fitted , its currently got 3.45's.
i was out at willowbank last night trying a few things ,so i could do some before and after testing.i found launching at 3500rpm was best ,so i averaged out my 3 best slips and come up with . 60 ty...ET.......MPH 2.009..14.736..93.32 2.047..14.766..93.32 2.030..14.778..93.44 averaged. 2.028..14.760..93.36 so how much difference do you reckon going from 3.45's to 3.89's make ? thanks guys ,jake |
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29-07-2006, 12:41 AM
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Boost Addict
Join Date: Jan 2005
Location: North Brisbane
Posts: 1,151
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**** me ..
i so need to get to willowbank ... best i got managed a 14.9 at 94.5 mph ... our drag strip is a skid pan, not a launch pad
__________________
N12 Pulsar - sold Gen1 Liberty Turbo - sold VP Commodore Turbo - sold LN65 Hilux Turbo - sold EL31 Corolla Turbo - sold Ford AU Ute Turbo - sold Ford AU XR8 Sedan - 5.4l V8 Turbo (in the build) Ford BA XR6T Ute - daily driver Ford FG XR6T Sedan - cruiser do you see a general trend? I DO  Can't live with it, can't live without it! |
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29-07-2006, 01:26 PM
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#3 | ||
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TL40 Wagon?
Join Date: Dec 2004
Location: Sydney
Posts: 2,377
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Well hard to say exactly but you would be expecting beter as the 3.9 will be giving around 5000rpm at 145-148kmh so you should just pass the tape under the rev limit in fourth as opposed to pulling around 4500 with the 3.45.
head to head same car track time diff lane Name Car 60' 330' 660' MPH 1000' ET MPH uselessT50. 2.312 6.497 9.94 71.37mph 12.929 15.458 89.07mph jonbaysT130 2.360 6.635 10.109 70.47mph 13.119 15.667 88.53mph jonbays vs useless0.04800.13800.1690-0.90000.19000.2090-0.5400 jonbays vs useless splits -0.0480-0.0900-0.0310-0.0210-0.0190 This is a run between me and useless with all the splits to show the big difference between me with 3.45 and him with 3.73 and a hi stall was in the 330'. So the diff ratio alone probably giving a 2 to 3 thousandth of a second per split. That would mean a 3.45 to 3.73 would net maybe a 0.15 second better qtr ET. So a 3.9 say 0,2 second better maybe ? |
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what do you reckon it'l do???
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