MGB: Brake fluid

What spec brake fluid should be used in a midget, Dot?

Dot 4 and a quality brand. Stay away from the junk at wally world etc. Stick to the nationally known brands.

Thanks Rick, I meant to ask you that the other day when i was getting the vacuum hose.

Earlier this year I boiled my brake fluid after 24 laps of this racetrack (lots of hard braking) to the point where I fished the next six laps having to give the thing one then finally two decent pumps.

I have now changed to MOTUL RBF660 Dot 4 "Racing Brake Fluid"

Typical Dry Boiling Point: 617F (325C)
Typical Wet Boiling Point: 399F (204C)

Not really much of a tryout last Sunday but it all worked well for me.

Eric, I use the Motul also and it's great. In the states I find it at motorcycle shops but rarely where they sell auto parts and supplies. Basil

AMSOIL Series 600 DOT 4 Racing Brake Fluid is formulated with the best zinc-based anti-corrosion additives and pH stabilizers. It is designed for high-temperature stability, yet flows easily at low temperatures. AMSOIL Series 600 Racing Brake Fluid's superior additive package provides good lubrication throughout the system and can raise boiling points to more than 232°C (450°F). It keeps water in suspension, slowing its effects on the brake system. AMSOIL Brake Fluids have high boiling temperatures, ensuring maximum life and reliable braking power, even in extreme conditions. AMSOIL Series 500 High- Performance DOT 3 Brake Fluid has a dry ERBP of 274°C (525°F) and wet ERBP of 156°C (313°F).

AMSOIL Series 600 DOT 4 Racing Brake Fluid has a dry ERBP of 304°C (580°F) and wet ERBP of 210°C (410°F).

Lower on the dry boiling point and higher on the wet.........

https://www.amsoil.com/catalog.aspx?GroupID=43

I've never had a problem with Valvoline synthetic... Only a 480 degree dry boiling point but I don't have to mail order it. I flush the system before every event. I think that's the important part, maybe combined with the fact that my cars aren't that heavy......................Cheers Henry Morrison

""""""What spec brake fluid should be used in a midget, Dot? """"

for a street car use Castrol LMA. It has a good wet and dry temp rating and is cheep at less than 4 bucks a small bottle at Pep Boys of all places. You shouldn't be using the brakes...they only slow you down. :D

Sam, I agree Castrol LMA is good stuff, but harder to find these days, Iused Vavoling synthetic (itmixes with non synthetic) you can find that at Advance, Rick hook a brother up :)

x3 LMA and nothing else for me