my M3 CSL - Page 14

**alexk** · 19-02-2018, 02:57 PM

Quote:

Originally Posted by Mike R

Wow, that is a significant saving

.

Does the Lithium battery need a special trickle charger

?

It's a special lithium battery charger Mike.

MisterCorn · 19-02-2018, 03:17 PM

It is a very impressive weight saving, but I would have some concerns about how well the battery would be held in place in an impact.

MC

**alexk** · 19-02-2018, 03:28 PM

Quote:

Originally Posted by MisterCorn

It is a very impressive weight saving, but I would have some concerns about how well the battery would be held in place in an impact.

MC

Fair comment, but the battery is only 2 kilos.
Worst case scenario is that the holder will bent, but that's the least of my concerns in a very severe crash.

**alexk** · 19-02-2018, 03:29 PM

I realized just now that I never posted the electric fan installation.
I have done a very good job with this one

I couldn't see with my telemetry a performance difference.

I will write something tonight.

**alexk** · 17-02-2019, 05:57 PM

Almost a year since the last post

Here we go.

Some time ago I removed the front AC fan as I believe it is reducing the airflow to the radiators.

The fan I bought to replace the mechanical fan is a SPAL - VA18-AP71/LL-59A.
The item number is -> # 30102049 . 2070 CFM 16" Spal Curved Blade Puller Fan

The unit is 2440g which means it's 700g heavier than the mechanical fan which is 1710g.
But, it reduces the parasitic losses and you can get to remove the AC fan which is a very heavy unit.

Mounting it was as easy as drilling 4 holes in the radiator, using 4 brackets and bolting it.

The clearance to the engine is simply perfect - like if it was made for the CSL.
I also cut the OEM fan shroud and put it back on.
The installations looks very clean.

I am driving this fan using the control unit of the AC fan and it works perfect.

monkeycsl · 17-02-2019, 06:16 PM

Does ac still work ok??

**CraigMillwardCroft** · 17-02-2019, 07:52 PM

Neat looking job

**alexk** · 17-02-2019, 08:19 PM

Quote:

Originally Posted by monkeycsl

Does ac still work ok??

Yes - no problems.

**alexk** · 17-02-2019, 08:21 PM

One more performance update.

I bought a set of titanium wheel bolts.
They were discounted and I could not resist.

The BBS wheel bolts are 388g while the titanium ones are 173g.
This is a 215g difference.

**glendog74** · 17-02-2019, 09:56 PM

Nice

19-02-2018, 03:29 PM	#134
alexk Driving it like I nicked it Join Date: Mar 2009 Posts: 2,784 Casino cash: $29969	I realized just now that I never posted the electric fan installation. I have done a very good job with this one I couldn't see with my telemetry a performance difference. I will write something tonight. __________________ www.clubcsl.com - I am a BMW Motorsport fan ! My youtube channel is here

17-02-2019, 05:57 PM	#135
alexk Driving it like I nicked it Join Date: Mar 2009 Posts: 2,784 Casino cash: $29969	Almost a year since the last post Here we go. Some time ago I removed the front AC fan as I believe it is reducing the airflow to the radiators. The fan I bought to replace the mechanical fan is a SPAL - VA18-AP71/LL-59A. The item number is -> # 30102049 . 2070 CFM 16" Spal Curved Blade Puller Fan The unit is 2440g which means it's 700g heavier than the mechanical fan which is 1710g. But, it reduces the parasitic losses and you can get to remove the AC fan which is a very heavy unit. Mounting it was as easy as drilling 4 holes in the radiator, using 4 brackets and bolting it. The clearance to the engine is simply perfect - like if it was made for the CSL. I also cut the OEM fan shroud and put it back on. The installations looks very clean. I am driving this fan using the control unit of the AC fan and it works perfect. __________________ www.clubcsl.com - I am a BMW Motorsport fan ! My youtube channel is here

17-02-2019, 08:21 PM	#139
alexk Driving it like I nicked it Join Date: Mar 2009 Posts: 2,784 Casino cash: $29969	One more performance update. I bought a set of titanium wheel bolts. They were discounted and I could not resist. The BBS wheel bolts are 388g while the titanium ones are 173g. This is a 215g difference. __________________ www.clubcsl.com - I am a BMW Motorsport fan ! My youtube channel is here

17-02-2019, 09:56 PM	#140
glendog74 CSL Register Uber-poster! Tetris Champion! Join Date: Apr 2008 Location: Cornwall Posts: 8,861 Casino cash: $32299	Nice __________________ Cha'mone Mother F**ker!

19-02-2018, 03:17 PM	#132
MisterCorn S5 - Full Throttle Join Date: Jan 2015 Posts: 391 Casino cash: $8663	It is a very impressive weight saving, but I would have some concerns about how well the battery would be held in place in an impact. MC

17-02-2019, 06:16 PM	#136
monkeycsl S5 - Full Throttle BMX Park Champion! Join Date: Jan 2008 Location: essex Posts: 444 Casino cash: $18732	Does ac still work ok??

17-02-2019, 07:52 PM	#137
CraigMillwardCroft CSL Register Uber-poster! Join Date: Oct 2010 Location: Marlow Posts: 3,973 Casino cash: $18153	Neat looking job