a sprocket ques...

[Tate]

i just recently entered the world of the busa...and i have a question for those who know. Im thinkin bout going 1 down on the front sprocket. now i need to know if the rpm change on a 1 down in front is drastic. i dont want to run the busa at 85-90 with rpms at 8k. now is it better (from an rpm perspective) to go down 1 in the front, or go 1 or 2 up in the rear?

need a little hlp...

thanks

 

[Aquaman]

I would go up 2 in the rear... I actually went up 3!
most like the 16/42 combo

 

[Professor]

Stock is 17/40   16/40 is right in between 17/42 and 17/43

Here is a chart and what they will change RPMs compared to stock


% from RPM RPM RPM RPM
Ratio Stock 2500 3000 5000 10000
15 38 2.533 7.67 2692 3768 5383 10767
15 39 2.600 10.50 2763 3868 5525 11050
15 40 2.667 13.33 2833 3967 5667 11333
15 41 2.733 16.17 2904 4066 5808 11617
15 42 2.800 19.00 2975 4165 5950 11900
15 43 2.867 21.83 3046 4264 6092 12183
15 44 2.933 24.67 3117 4363 6233 12467
15 45 3.000 27.50 3188 4463 6375 12750
15 46 3.067 30.33 3258 4562 6517 13033
16 38 2.375 0.94 2523 3533 5047 10094
16 39 2.438 3.59 2590 3626 5180 10359
16 40 2.500 6.25 2656 3719 5313 10625
16 41 2.563 8.91 2723 3812 5445 10891
16 42 2.625 11.56 2789 3905 5578 11156
16 43 2.688 14.22 2855 3998 5711 11422
16 44 2.750 16.88 2922 4091 5844 11688
16 45 2.813 19.53 2988 4184 5977 11953
16 46 2.875 22.19 3055 4277 6109 12219
17 38 2.235 -5.00 2375 3325 4750 9500
17 39 2.294 -2.50 2438 3413 4875 9750
17 40 2.353 0.00 2500 3500 5000 10000
17 41 2.412 2.50 2563 3588 5125 10250
17 42 2.471 5.00 2625 3675 5250 10500
17 43 2.529 7.50 2688 3763 5375 10750
17 44 2.588 10.00 2750 3850 5500 11000
17 45 2.647 12.50 2813 3938 5625 11250
17 46 2.706 15.00 2875 4025 5750 11500
18 38 2.111 -10.28 2243 3140 4486 8972
18 39 2.167 -7.92 2302 3223 4604 9208
18 40 2.222 -5.56 2361 3306 4722 9444
18 41 2.278 -3.19 2420 3388 4840 9681
18 42 2.333 -0.83 2479 3471 4958 9917
18 43 2.389 1.53 2538 3553 5076 10153
18 44 2.444 3.89 2597 3636 5194 10389
18 45 2.500 6.25 2656 3719 5313 10625
18 46 2.556 8.61 2715 3801 5431 10861

 

[chevelle]

I don't like running a lot of gear myself. Here is a gear calc. that lets you compare.

 

[Tate]

u guys r bad azz, thanks alot!