is there a way to modify the stock temp gauge so that it is more accurate?

 

haven't heard of one but the easy way out is to buy a water temp gauge for like 50 bucks.

 

There is a way to linearize the stock temp gauge:

http://www.geocities.com/sdrx7_club/Instructions.pdf

-edit- you have to copy and paste the link for it to work

 

Linearizing it doesnt fix the gauge... it only moves the reading range up... while it will better inform you of a high temp scenario the lower temperature range (warm up) will not show accurately... This really isnt a problem as long as you let your car warm up properly or dont boost at all for the first few minutes of your trip.

~Kris