kovalb
Posts: 373
Joined: Tue Jun 28, 2011 12:37 pm
Delivery Date: 09 Apr 2014
Location: Phoenix

Re: Aeromod nissan leaf improved aerodynamics increased rang

Fri Feb 20, 2015 12:48 pm

That grill opening was put there for a reason. The radiator cools the motor, inverter, and charger. The condenser/evaporator is needed for the A/C and heat pump. Air needs to flow through them to function. Just saying.
Had six Nissan LEAFs in five years. Hope to get another.
Retired Nissan Employee (NTCNA-AZ). Opinions expressed here are my own.

Slow1
Posts: 487
Joined: Fri Jul 11, 2014 3:15 pm
Delivery Date: 28 Jun 2014
Leaf Number: 425010
Location: Eastern MA, USA

Re: Aeromod nissan leaf improved aerodynamics increased rang

Fri Feb 20, 2015 12:55 pm

kovalb wrote:That grill opening was put there for a reason. The radiator cools the motor, inverter, and charger. The condenser/evaporator is needed for the A/C and heat pump. Air needs to flow through them to function. Just saying.
I tend to agree - however I wonder if it is as necessary when it is well below freezing outside and I'm suffering range loss due to the cold. How much can these parts heat up in the 50-60 miles I can manage to drive before a charge when it is this cold? (Was about zero this morning when I took kids to school)

Assuming that covering these can get me 10% additional range, it would be worth it to me to insert/remove based on outdoor temps. Perhaps take my winter range from 60 to 66 miles which could make a difference on some days...

I miss summer for so many reasons right now :)
2013 S with 6kw upgrade (Black)
MFD Date 12/13

NasGoreList
Posts: 140
Joined: Thu May 15, 2014 7:15 pm
Delivery Date: 30 Apr 2014
Location: Falls Chruch, VA

Re: Aeromod nissan leaf improved aerodynamics increased rang

Fri Feb 20, 2015 1:00 pm

waiting for the second modder to confirm his results

GetOffYourGas
Posts: 2084
Joined: Tue Dec 20, 2011 6:56 pm
Delivery Date: 09 Mar 2012
Location: Syracuse, NY

Re: Aeromod nissan leaf improved aerodynamics increased rang

Fri Feb 20, 2015 2:56 pm

Slow1 wrote:
kovalb wrote:That grill opening was put there for a reason. The radiator cools the motor, inverter, and charger. The condenser/evaporator is needed for the A/C and heat pump. Air needs to flow through them to function. Just saying.
I tend to agree - however I wonder if it is as necessary when it is well below freezing outside and I'm suffering range loss due to the cold. How much can these parts heat up in the 50-60 miles I can manage to drive before a charge when it is this cold? (Was about zero this morning when I took kids to school)

Assuming that covering these can get me 10% additional range, it would be worth it to me to insert/remove based on outdoor temps. Perhaps take my winter range from 60 to 66 miles which could make a difference on some days...

I miss summer for so many reasons right now :)
What's more, those components must be kept cool even in the heat of an Arizona summer. We never see temps like that in the Northeast. If it gets to 90, it's a hot day. It's the humidity that kills here, but the components don't care so much about that.

So I really wonder if the lack of airflow really matters even in a Northeast summer. Keep in mind also that if you really care about that extra 10% of range, you are probably already hypermiling. As a result, the motor/inverter are generating less heat to be dissipated.

Ultimately, I hope that these companies get wise to active airflow control. Shutter off the grill when it's not needed. Let the car decide based on putting sensors in the right places.
~Brian

EV Fleet:
2011 Torqeedo Travel 1003 electric outboard on a 22' sailboat
2012 Leaf SV (traded for Bolt)
2015 C-Max Energi (302A package)
2017 Bolt Premier

Brenthasty
Posts: 60
Joined: Tue Dec 23, 2014 6:24 pm
Delivery Date: 13 Nov 2014
Leaf Number: 023724
Location: Near portland oregon
Contact: Website

Re: Aeromod nissan leaf improved aerodynamics increased rang

Fri Feb 20, 2015 3:24 pm

100 miles and dc quick charge battery just 5f above ambient 4.6m/kwh @62mph

lorenfb
Posts: 2425
Joined: Tue Dec 17, 2013 10:53 pm
Delivery Date: 22 Nov 2013
Leaf Number: 416635
Location: SoCal

Re: Aeromod nissan leaf improved aerodynamics increased rang

Fri Feb 20, 2015 5:00 pm

drees wrote:
Slow1 wrote:So there were two things done - one was the mud flaps and the other blocking off the grill? Mudflaps seem to be a significant commitment - perhaps just dong the grill would make a difference and is worth trying. That seems to be a (reversible) change that even simple folks like myself could do....
The results here seem too good to believe, but easy to try so I whipped up a quick chloroplast grill block using an old yard sign and some zip ties. Probably not quite as effective as Brenthasty's because I left the grill block flush with the mesh grill and it doesn't quite cover as much grill (the gaps are more even than the pic looks as I didn't take the pic head on - my license plate is already mounted like his in front the grill), but I should be able to tell if there's a noticeable difference after a few days of driving. If not, I'll make my grill flush with the bumper and check again.
Consider using LeafSpy which provides a power (kW/HP) consumption reading and monitoring it at
various constant speeds with and without the mod. Minimal efforts should be necessary for verification
or not, i.e. less than an hours driving to gather 10 data points (5 with & 5 without).
Last edited by lorenfb on Fri Feb 20, 2015 8:01 pm, edited 3 times in total.
#1 Leaf SL MY 9/13: 76K miles, 47 Ahrs, 5.0 miles/kWh (average), Hx=70, SOH=73, L2 - 100% > 1000, temp < 95F, (DOD) > 20 Ahrs
#2 Leaf SL MY 12/18: 10.3K miles, SOH 109Ahrs/115Ahrs, 5.2 miles/kWh (average), DOD > 20%, temp < 105F

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TomT
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Leaf Number: 000360
Location: California, now Georgia
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Re: Aeromod nissan leaf improved aerodynamics increased rang

Fri Feb 20, 2015 5:57 pm

Ford published statistics on the fuel efficiency improvement that came about from the shutterstats that they incorporated in to some of their vehicles... When they were completely closed, blocking off the grill entirely, the efficiency improvement was approximately 4%...
Last edited by TomT on Sat Feb 21, 2015 3:24 pm, edited 1 time in total.
Leaf SL 2011 to 2016, Volt Premier 2016 to 2019, and now:
2019 Model 3; LR, RWD, FSD, 19" Sport Wheels, silver/black; built 3/17/19, delivered 3/29/19.

lorenfb
Posts: 2425
Joined: Tue Dec 17, 2013 10:53 pm
Delivery Date: 22 Nov 2013
Leaf Number: 416635
Location: SoCal

Re: Aeromod nissan leaf improved aerodynamics increased rang

Fri Feb 20, 2015 7:53 pm

TomT wrote:Ford published statistics on the fuel efficiency improvement that came about from the shutterstats that they incorporated in to some of their vehicles... When they were completely closed, blocking off the grill entirely, the efficiency improvement was approximately 5%...
That sounds about what one might expect.
#1 Leaf SL MY 9/13: 76K miles, 47 Ahrs, 5.0 miles/kWh (average), Hx=70, SOH=73, L2 - 100% > 1000, temp < 95F, (DOD) > 20 Ahrs
#2 Leaf SL MY 12/18: 10.3K miles, SOH 109Ahrs/115Ahrs, 5.2 miles/kWh (average), DOD > 20%, temp < 105F

LeftieBiker
Moderator
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Location: Upstate New York, US

Re: Aeromod nissan leaf improved aerodynamics increased rang

Sat Feb 21, 2015 1:50 am

Ultimately, I hope that these companies get wise to active airflow control. Shutter off the grill when it's not needed. Let the car decide based on putting sensors in the right places.
The Japanese Prius has had thermostat-controlled grille shutters for years, I've read. This topic, along with the prospect of maybe two more Winters with my Leaf, has me thinking about a plexiglass grill block that would be inconspicuous...
Scarlet Ember 2018 Leaf SL W/ Pro Pilot
2009 Vectrix VX-1 W/18 Leaf modules, & 3 EZIP E-bicycles.
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darthwilliam
Posts: 5
Joined: Fri Oct 31, 2014 12:44 pm
Delivery Date: 16 Oct 2014

Re: Aeromod nissan leaf improved aerodynamics increased rang

Sat Feb 21, 2015 1:53 pm

How does blocking the front vents affect efficiency of the heat pump?
Also how did you make the flat wheel covers and attach them?
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2015 Leaf SV Blue Ocean with LED headlights and quick charge package.

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