Whats your opinion? I need it for my kart because the silicon DOT 5 sucks donkey ***** and i wouldnt mind having some better pedal feel in the 7.

 

The only 5.1 that I know of is Motul 5.1, but I'd rather use their RBF600 or Wilwood's EXP Plus or Castrol SRF which are all DOT 4 fluids.

 

Forget about the DOT number, it's just a MINIMUM spec. Personally I use Ford DOT3 fluid that I get at the parts store for less than $7 a bottle (bought some today in a Prestone bottle). If you go to Ford to buy it you'll get 500 degree F stuff, as they re-formulated it a while ago, but if you can find it at your local auto parts store, chances are it's the old formula 550 degree F stuff. It does absorb more water than some other fluids, but it's so cheap that bleeding more isn't a big deal at all.

 

i dont care about bleeding brakes or how cheap it is. Its going to be used in my kart as well and the DOT 5 silicone crap sucks. the 5.1 holds up to temp and water better. i cant use anything under 5. All the leading brake fluid companys produce it, but i just want to know if you guys think one would be better than the other.

 

You can use 5.1 in DOT 5 vehicles? didn't know that........since 5.1 isn't silicone-based.....

Motul's 5.1 is only something like 550 F, but their DOT 4 RBF600 is 591 F or something.

 

as far as ive been told, Yes.

just going by what i hear at the track. I HATE the DOT 5 silicone crap. It always gives a mushy pedal and is always getting burnt. Im tired of changing brake fluid after every race to have it happen halfway through the next day.

im gonna try and find out more about the kart, but if i have to ill find a way to use something better! lol

 

Right, I'm still confused as why the kart can't take DOT 4 fluid.....maybe not the baseline ones that have crappy dry boiling points, but an RBF600 (591 F), SRF (574 F) or EXP Plus (620 F) should have high enough boiling points to last in a kart.

 

Just a heads up, I spoke with Motul several years back about the 5.1 and they said your braking system needs to be COMPLETELY CLEAN OF ANY OLD FLUID, OR ANYTHING UNDER 5.1. I can't remember the specifics, but he was basically implying that if you have run something other than 5.1 in the vehicle than you should stick with DOT 4 max. This might pertain to Motul only, but just want you to know so there's no problems with the car.

Rishie

 

dont forget, you must look at the wet boiling points too!

i found a great article while searching for different brands of brake fluid:
http://www.stoptech.com/tech_info/wp...fluid_1a.shtml

 

yes. this is true with all, not just motul or 5.1. You should do this when ever changing from one DOT type to another.

 

You can mix 3 and 4 without a problem. If you're talking about opitmality then yes.

 

Wet boiling points are only important if you don't do maintenance. Fresh brake fluid is what you want no matter what, so the dry boiling point is what you'll actually be getting.

Like I said, the DOT# is only the MINIMUM STANDARD, not necessarily what you'll actually be getting. Look at the actual rating on the bottle.

 

yes, this is true.

i did, from what i saw, Castrol SRF is the best but 3 or 4 times higher priced.
NEO Super DOT 661 (i think thats the name) is the best for it price.

just what i saw from that stoptech article.

 

ATE Super Blue.

 

Super Blue's Dry Boiling Point is too low next to the fluids that already have been mentioned.

You mean Neo 610, right? I couldn't find 661 on the internet.

SRF is expensive because it has an ungodly high wet boiling point. You could literally leave that fluid in for god knows how many years.

 

yeah thats it.

yeah i know, but i think i would still end up burning that **** in my kart at least, or have some brake failure were we lose all the damn fluid! itd be my luck... lol

 

That's the one thing that I really like about the Ford DOT3, it has a higher boiling point than some of the expensive race fluids (such as the ATE Super Blue) and is cheap and readily available (well for me anyway, Canadian Tire sells it), so I think nothing of flushing the brakes very thoroughly, and there's no worries about not having enough and needing to order it from far away and waiting for a week or more to get it.

 

WHy not Google for it than post on a forum where few people have any karting knowledge?

http://www.google.com/products?q=dot...num=1&ct=title

 

i did, and this is also, more than likely, going to be in my car someday.