HICKL Posted September 16, 2007 Share Posted September 16, 2007 I broke my R200 again and I have two donors to replace with. One is a 3.55 and one is a 3.7 ratio. I'm trying to decide which would be better for my 1/4 mile times. Keep in mind, I am running a manual 5 speed. Will the added pull of the 3.7 be outweighed by the fact that I will blow thru first gear even quicker? I've never really played with gear ratio's so any input would be appreciated. My power plant is a fairly stout 383 so factor that in as well. Or, are they so close that I won't even notice any difference. Thanks for your input. Jeff Quote Link to comment Share on other sites More sharing options...
280zwitha383 Posted September 16, 2007 Share Posted September 16, 2007 How did you break it? If you're just doing 1.8 60' still then you're not launching very hard it doesn't seem. What am I missing? Popping the clutch? Quote Link to comment Share on other sites More sharing options...
HICKL Posted September 16, 2007 Author Share Posted September 16, 2007 I have been known to pop the clutch every now and then...but let's not get off track of my question here. Anybody got any input? Quote Link to comment Share on other sites More sharing options...
jnjdragracing Posted September 16, 2007 Share Posted September 16, 2007 My vote is for the 3.54 setup, because you have such a low first gear with the T-5. The Z should run out nice on top end with the 5th gear over drive.Jerry Quote Link to comment Share on other sites More sharing options...
grumpyvette Posted September 16, 2007 Share Posted September 16, 2007 gear spread sheet that comes in handy THANKS TO 1FATGMC http://purplesagetradingpost.com/sumner/bvillecar/bville-spreadsheet-index.html THE 3.73 RATIO, PUTS SLIGHTLY MORE USEABLE POWER, DURRING A RUN TO THE PAVEMENT, (ASSUMING YOUR RUNNING THE SUSPENSION AND TIRES TO LAUNCH HARD) KEEP IN MIND youll spend over 90% of the time in the 3500rpm-6500rpm band durring a race, exactly where your 383 is cammed to run HERES OTHER INFO LINKS http://www.wallaceracing.com/reargear.htm http://users.erols.com/srweiss/calcmph.htm http://users.erols.com/srweiss/calcrpm.htm http://users.erols.com/srweiss/calcrgr.htm http://users.erols.com/srweiss/transc.htm#tabtop http://users.erols.com/srweiss/transc.htm#Auto Quote Link to comment Share on other sites More sharing options...
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