Join Date: Jan 2007
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Dot 4 should be ok for brake fluid, unless you plan on abusing the brakes by taking it on a track or just hard braking on the road. For normal use though it'll be fine as you 'should' never get the brakes hot enough to make it boil.
If you did want to upgrade though you can easily change to Dot 5.1. This stuff has a higher boiling point than Dot 4 and can be mixed with it. Still probably a good idea to change out all the fluid in the system just for peice of mind.
Steer clear of Dot 5 though, this stuff is silicone based and doesn't mix with Dot 4 or 5.1. It's like trying to mix
and water. Also the silicone based Dot 5 can destroy your seals in the braking system.
As for upgrading the rear brakes, have you thought about taking the complete rear beam from a Lag with rear discs? You'll need the hand brake cable too and might be worth grabing the servo off the same car while your there. If you've got ABS the car you take it all from will need ABS too.
Understeer is when you hit the wall with the front of the car.
Oversteer is when you hit the wall with the rear of the car.
Horsepower is how fast you hit the wall.
Torque is how far you take the wall with you.
Currently in Mikey's garage:
1996 Mazda MX-3 V6, a 2002 1.2 8v Fiat Punto active (the Wife's!) and a 1998 Suzuki GN 125. Used to own a 2002 Laguna II Dynamique 1.8 16V (Now Sold yey!)