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HotRod929 · 01-22-2003, 09:31 PM

I recently put a tach in my truck and went out on the high way and got some RPM data. then I went to smokemup.com and tried to figure my rear end with my tires and what not. It said I had something like a 4.56...is this possible and how can I verify this? Sould I drop down to a 4.10 or something? I thought I had 4.10s but maybe I dont. Thanks

HotRod

01-22-2003, 09:31 PM	#1
HotRod929 Registered User Join Date: Mar 2002 Location: Bondurant, IA but in Worcester, MA for school Posts: 767	What rear end gear do I have??? I recently put a tach in my truck and went out on the high way and got some RPM data. then I went to smokemup.com and tried to figure my rear end with my tires and what not. It said I had something like a 4.56...is this possible and how can I verify this? Sould I drop down to a 4.10 or something? I thought I had 4.10s but maybe I dont. Thanks HotRod __________________ 1970 Chevy C-20 350 V-8 Turbo 350 w/ shift kit Dana 60 w/ 4.10 gears AND Powr-Loc POSI New Additions: Summit Headers 135amp alternator Proform HEI Edelbrock 1406 600cfm carb Sunpro Tach Powr-Loc POSI Edelbrock Performer RPM Intake MSD 6A Ignition Box AIM: HotRod929 Visit My Site: http://1970chevy.netfirms.com/