man i think my speedo is broken. what is everybodys rpms at 80mph in a 280zx?

david karey

SoCalZ Prez
http://www.socalz.org

 

what tire size you runnin?

-Steve
http://www.geocities.com/stev240z

 

i have 14's with 195-70-14s on them

i have a friend wating to heal from a sickness that is giving me some turbo rims next week.

dk

SoCalZ Prez
http://www.socalz.org

 

hehe I don't really have an answer for ya at that speed..

Though I do know with 245/45/16 tires, a .745 5th gear, 4.11 R200 @7400rpm I was doing about 148mph.

BTW stock speedos aren't that accurate.. changing the size of tires, trannies, diffs, as well as speedo cogs all affect your readout. If you have made changes to any of these.. a new speedo cog is probably in order.

 

195-70-14 the correct tire size, so that rules that out... have you paced a friend while talking on a cell phone to see if your speedo is right?

-Steve
http://www.geocities.com/stev240z