I have had the ls1 conversion on my car for a long time and I am happy with them, but I've been using an LT1 master. Should I replace with an LS1? Is there any difference??

 

You do not need the LS1 master.
What you have should be working fine. I have never heard anyone say they changed the master when they did the conversion.

Why are you concerned?

 

Using front and rear LS1 brakes with the stock master cylinder, no problem here.

 

No you do not need it, mine works fine with the stock LT1 master cylinder going on 3 years now.

 

Please post on correct forum.... moving to "Suspension, Chassis and Brakes".

 

Sorry about that Fred...

I always thought that the piston in the LS1 master had more surface area. Which would mean that it moves more fluid than an LT1 master with a similar stroke of the brake pedal. Every LS1 I have driven has brakes that respond very quickly... my car brakes good, but to get the max effect I have to push the pedal down a bit further than I would have to in an ls1 that seems like it has hairpin brakes...