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      06-14-2021, 04:22 AM   #111
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Quote:
Originally Posted by hellokitty View Post
I decided to geek around with a refractometer this weekend and messed around with different BMW coolant percentages, distilled water and Redline water wetter.

Based on my data in BM3, my coolant temperature has dropped 7-8 degrees f using the following:

20% coolant
80% distilled water
1/32 ratio of water wetter (4oz per gallon of distilled water)

I figure Id try to make the most of the stock cooling system by making it more efficient. This DIY cost me $15 so Im happy with the results.
Used water wetter back in my road racing days in the R6. It looks and reacts like dish detergent but what it does is increases the dissipation of heat from metal to the water so it stimulates heat transfer

Works wonders
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      06-14-2021, 12:48 PM   #112
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Quote:
Originally Posted by hellokitty View Post
I decided to geek around with a refractometer this weekend and messed around with different BMW coolant percentages, distilled water and Redline water wetter.

Based on my data in BM3, my coolant temperature has dropped 7-8 degrees f using the following:

20% coolant
80% distilled water
1/32 ratio of water wetter (4oz per gallon of distilled water)

I figure I’d try to make the most of the stock cooling system by making it more efficient. This DIY cost me $15 so I’m happy with the results.
Probably the best ratio for street cars, if you flush coolant regularly.

Most track cars get best results from 100% distilled water + water wetter, at the cost of the corrosion protection you get from antifreeze/coolant.
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      06-14-2021, 05:29 PM   #113
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Quote:
Originally Posted by hellokitty View Post
I decided to geek around with a refractometer this weekend and messed around with different BMW coolant percentages, distilled water and Redline water wetter.

Based on my data in BM3, my coolant temperature has dropped 7-8 degrees f using the following:

20% coolant
80% distilled water
1/32 ratio of water wetter (4oz per gallon of distilled water)

I figure I’d try to make the most of the stock cooling system by making it more efficient. This DIY cost me $15 so I’m happy with the results.
What does that 20% coolant come out it "down to freezing temps"? like down 20F on one of those little testers?
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Last edited by sly1types; 06-14-2021 at 05:48 PM..
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      06-14-2021, 05:34 PM   #114
hellokitty
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Quote:
Originally Posted by sly1types View Post
Quote:
Originally Posted by hellokitty View Post
I decided to geek around with a refractometer this weekend and messed around with different BMW coolant percentages, distilled water and Redline water wetter.

Based on my data in BM3, my coolant temperature has dropped 7-8 degrees f using the following:

20% coolant
80% distilled water
1/32 ratio of water wetter (4oz per gallon of distilled water)

I figure I’d try to make the most of the stock cooling system by making it more efficient. This DIY cost me $15 so I’m happy with the results.
What does that 20% coolant come out it down to freezing temps? like down 20F on one of those little testers.
When using 20%, your freezing point is around 15 degrees f.
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      07-26-2021, 07:42 PM   #115
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Really helpful thread, thanks folks. Stock FTW, and CSF is quite the joke (and a rip off).
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