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-   -   BMS automatic transmission cooler upgrade (https://www.n54tech.com/forums/showthread.php?t=56319)

Turbohugh 05-22-2019 06:20 PM

If I install this cooler what else would I need to do for the heat-xchanger delete?
Would I be able to run a MT radiator ? Anyone know what mods I would need to run the MT radiator ? My intent is to get rid of the coolant loop for the heat-xchanger when I go to a replacement transmission oil cooler solution.

james1986_135i 05-22-2019 08:06 PM

Does it fit RHD Vehicles or not?

Jeffman 05-22-2019 08:48 PM

I would like to install this with a 160F thermostat. What thermostat should I purchase and what additional hardware is needed? And how would the thermostat be connected? Thanks.

Payam @ BMS 05-23-2019 11:18 AM

Quote:

Originally Posted by Turbohugh (Post )
If I install this cooler what else would I need to do for the heat-xchanger delete?
Would I be able to run a MT radiator ? Anyone know what mods I would need to run the MT radiator ? My intent is to get rid of the coolant loop for the heat-xchanger when I go to a replacement transmission oil cooler solution.

Just as the directions state. You remove the OEM trans cooler and replace it with the upgrade. No more coolant in the loop.

Quote:

Originally Posted by james1986_135i (Post )
Does it fit RHD Vehicles or not?

Yes, it's at the bottom of the application list.

Quote:

Originally Posted by Jeffman (Post )
I would like to install this with a 160F thermostat. What thermostat should I purchase and what additional hardware is needed? And how would the thermostat be connected? Thanks.

Improved racing is what I would go with. It would be a DIY or you'd have to take it to a professional.

Rundskop 05-24-2019 07:11 PM

First post!

Just had the BMS trans cooler installed on my 135i. I have an Improved Racing 160F tstat that was not installed with it.

So far even in a bit of traffic at 65F ambient the trans won’t go higher than 137F which is crazy impressive. But this leads me to believe that a stat is somewhat necessary to get it up to Temp.

Wondering what the best way to add the inline tstat is?

Can the BMS line be ordered separately?

Turbohugh 05-25-2019 08:57 AM

Quote:

Originally Posted by Payam @ BMS (Post )
Just as the directions state. You remove the OEM trans cooler and replace it with the upgrade. No more coolant in the loop.

Thanks for responding.

I understand the directions. I'm unclear on 'once the heat exchanger is bypassed' I would like to upgrade the radiator to a MT one [that does not have the coolant loop]. Just wondering if anyone is knowledgeable about any differences ie : Other coolant lines or any waterpump related issues that would have to be addressed once I switched to a more robust non-AT radiator.

FWIW I will likely be going with the kit for my e90 once I figure out if it's possible to transition to a MT radiator after that trans cooler is installed.

thanks in advance.

msport335 05-26-2019 06:17 AM

is it 10AN straight through from the trans quick connect fittings all the way to the cooler?

any upcoming sale on the kit ? (given it doesn't come with thermostat and not sure of the cooler quality)

Payam @ BMS 05-28-2019 11:35 AM

Quote:

Originally Posted by Turbohugh (Post )
Thanks for responding.

I understand the directions. I'm unclear on 'once the heat exchanger is bypassed' I would like to upgrade the radiator to a MT one [that does not have the coolant loop]. Just wondering if anyone is knowledgeable about any differences ie : Other coolant lines or any waterpump related issues that would have to be addressed once I switched to a more robust non-AT radiator.

FWIW I will likely be going with the kit for my e90 once I figure out if it's possible to transition to a MT radiator after that trans cooler is installed.

thanks in advance.

No you shouldn't have any issues if you want to go to an MT radiator upgrade.

Quote:

Originally Posted by msport335 (Post )
is it 10AN straight through from the trans quick connect fittings all the way to the cooler?

any upcoming sale on the kit ? (given it doesn't come with thermostat and not sure of the cooler quality)

Yup! -10 AN all the way. No sales, we price everything very low to make it affordable for everyone. Piecing a trans cooler kit will eventually cost about $500-600.

APDE90N54 06-03-2019 09:14 AM

I would get your own SS lines and get the quick connect an fittings, as well as buy a cooler for way cheaper. I built an oil cooler with a $250 thermo and still 50 percent less. The cooler is not amazing. Looking back I would not pay $400 for the kit. Bracket is convenient but I weld on up and it works fine.

Payam @ BMS 06-03-2019 09:39 AM

Quote:

Originally Posted by APDE90N54 (Post )
I would get your own SS lines and get the quick connect an fittings, as well as buy a cooler for way cheaper. I built an oil cooler with a $250 thermo and still 50 percent less. The cooler is not amazing. Looking back I would not pay $400 for the kit. Bracket is convenient but I weld on up and it works fine.

Nice!

Milan 06-05-2019 09:05 AM

Can anyone in Arizona or somewhere hot let me know what their stock temps are in stop and go traffic?

I've had pretty good luck with this cooler but I noticed in 90 degree weather in stop and go my temps can still hit like 230 or so. I never logged my car in the summer with the old setup to see the difference

Payam @ BMS 06-05-2019 09:30 AM

Quote:

Originally Posted by Milan (Post )
Can anyone in Arizona or somewhere hot let me know what their stock temps are in stop and go traffic?

I've had pretty good luck with this cooler but I noticed in 90 degree weather in stop and go my temps can still hit like 230 or so. I never logged my car in the summer with the old setup to see the difference

I was initially testing this in 110* last year during the hot summer.

In stop and go traffic my temps got up to 190* at most. After some driving it went back down to 160ish. I'd have to look over my logs... if I can still find them :(

Milan 06-05-2019 10:10 AM

Quote:

Originally Posted by Payam @ BMS (Post )
I was initially testing this in 110* last year during the hot summer.

In stop and go traffic my temps got up to 190* at most. After some driving it went back down to 160ish. I'd have to look over my logs... if I can still find them :(

How long is your drive? My drive home is 45 min to 1 hour now thanks to the mass exodus of Californians lol

You guys still have traffic over there? jk

Payam @ BMS 06-05-2019 02:51 PM

Quote:

Originally Posted by Milan (Post )
How long is your drive? My drive home is 45 min to 1 hour now thanks to the mass exodus of Californians lol

You guys still have traffic over there? jk

Yes, my commute to work is 37 miles each way, so about 1 hour drive.
It's been really cool here, so maybe in a couple of weeks I'll get another log when the temps are 100+

HKD126 06-11-2019 03:42 PM

You guys should offer this kit with a thermostat option. I think being plug and play having that option would be attractive for many folks.

Any chance on coming out with an N54 oil cooler plug and play kit as well?

Payam @ BMS 06-11-2019 04:31 PM

Quote:

Originally Posted by HKD126 (Post )
You guys should offer this kit with a thermostat option. I think being plug and play having that option would be attractive for many folks.

Any chance on coming out with an N54 oil cooler plug and play kit as well?

Thermostat would bring cost up an additional $250, I might make it an option for those in colder weather. I haven't had any issues in our winter time when it gets 35* though. I'll look more into it though.

I don't think we'll be coming out with an oil cooler. Too many options already out, hard to compete with ebay at $100 for a PNP kit lol.

HKD126 06-11-2019 06:53 PM

Quote:

Originally Posted by Payam @ BMS (Post )
Thermostat would bring cost up an additional $250, I might make it an option for those in colder weather. I haven't had any issues in our winter time when it gets 35* though. I'll look more into it though.

I don't think we'll be coming out with an oil cooler. Too many options already out, hard to compete with ebay at $100 for a PNP kit lol.

I live in Wisconsin, so the thermostat option would be awesome.

Streetpro 06-24-2019 05:32 AM

T-stat doesn't cost $250 but it is surely you who decide the price of the complete kit...

Payam @ BMS 06-24-2019 09:57 AM

Quote:

Originally Posted by Streetpro (Post )
T-stat doesn't cost $250 but it is surely you who decide the price of the complete kit...

It depends on the thermostat of course, plus it's not just the Tstat, it's the two extra lines and fittings as well :)

We'd use either Improved racing or Mocal thermostats.

335iE91 06-25-2019 09:27 PM

I would like to retain the original cooler/heater and put a thermostat and the bms cooler kit in between the return line. Would like do fit this myself but i can't find the right adapter fittings. Anyone know where to find these?

Payam @ BMS 06-26-2019 07:28 AM

Quote:

Originally Posted by 335iE91 (Post )
I would like to retain the original cooler/heater and put a thermostat and the bms cooler kit in between the return line. Would like do fit this myself but i can't find the right adapter fittings. Anyone know where to find these?

The stock one has a thermostat built in.

335iE91 06-26-2019 07:33 AM

Thanks!

Streetpro 06-27-2019 02:17 AM

Stock heat exchanger cools oil just after it reaches 200 degs by opening the passage in the water leg - T-stat is controlling the water, there is no T-stat in the oil line...
Otherwise the oil would not circulate if there would be closed valve in line (T-stat)... think about the engine oil cooler/T-stat, it is the same thing...
A proper solution is to dump the whole heat exchanger, run a cooler w T-stat (170-200max) + a vent to keep the temps happy in the city/low speeds

335iE91 06-28-2019 06:15 AM

I was under the impression that it was heating the trans oil until that's up to operating temps. Now I know better so thanks for the explanation!

SPANKY 06-28-2019 06:20 AM

Quote:

Originally Posted by Streetpro (Post )
A proper solution is to dump the whole heat exchanger, run a cooler w T-stat (170-200max) + a vent to keep the temps happy in the city/low speeds

What is this "Vent" for our cars?


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