I am going to convert my R200 diff to an R200LSD I was wondering with the gearing changes will my speedo be incorrect by much?

 

Yep... The speedo will be off. How much? Depends on the rear end ratio.

 

Yeah I am just wondering if it will be a signifigant amount.

 

Its safe to assume it will be off on the low side , so like say if it's reading 65 , you're probably doing 70 , or something like that.

You're going from a 3.54 to a 3.7 , so actually I think the speedo will be off on the high side. So what I said above SHOULD be incorrect.

 

Have a cop buddy?
maybe time to get one, have him radar you at a given speed and see what he tells you. Of course the optimum time would be right after the radar gun had been calibrated. just an idea.
Or there's always those radar stations they post on the side of the road trying to get ppl to slow down. I'm not sure how prevalant they are in your neck of the woods, but I see them around by me on every other major street. With summer coming up soon, I'll probably be seeing more and more of them.

 

LOL I was thinking about asking a cop to radar me. I have a friend that has a brand new state fo the art GPS system so I am going to take him for a ride when I put the LSD on and have him measure it. If not I probably will ask a cop because the speed indicators are extremely rare around here(one good thing about where I live is alot of backroads with little traffic but everything else here sucks).

 

www.schlaver.com/zCarGo.html there is alot of info that you might find usefull

 

What would be a good way to recalibrate my Zs speedo after the switch?

 

how about a speedo cable from same rearend(just a gues,i realy dont know for sure)