Anyone planning HAC (Hill Assist) retrofit? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Zardoman · 05-07-2016, 09:55 PM

Hi Guys,

I found out about this technology when I went on my recent trip to Ireland. I rented a car (Ford Fiesta 2015/16 base model), and noticed that when I was on a hill, and when I release the brake while engaging the clutch, the car will not slide backwards, at first I thought it was my awesome clutching, but then I tested and realized it was HAC..

Now my question is, for a such economy car and it was able to have this feature, should it be easy to do a retrofit to our cars? I know the 2017s will have them, so wanted to see if anyone has already done/planning to to a HAC to prior 2017 models.. I am interested!

Thanks,

Teseo · 05-07-2016, 10:23 PM

IIRC 2012 and up Camaro have that feature. I noticed when my coworker gave me a ride on a zL1

humfrz · 05-08-2016, 12:16 AM

Not really.

I figure that anyone that needs that on a car, should have gotten a car with an automatic transmission.

humfrz

PandaSPUR · 05-08-2016, 12:19 AM

TBH I would still love that feature for when I'm stuck in traffic on a hill. But no, never thought of even looking for a retrofit.

Ultramaroon · 05-08-2016, 12:28 AM

Quote:

Originally Posted by humfrz

Not really.

I figure that anyone that needs that on a car, should have gotten a car with an automatic transmission.

humfrz

Agreed. Zero interest.

_gt86_user · 05-08-2016, 12:42 AM

Nope.

NLSP · 05-08-2016, 12:52 AM

Nah. Using the handbrake works just as good.

ZionsWrath · 05-08-2016, 03:21 AM

I bet it is way more expensive to retrofit than you think. It's a cute feature but I wouldn't pay $ for it.

Zardoman · 05-08-2016, 05:07 AM

yea, just thought if a base fiesta has it, shouldn't be expensive to put one in. As much as i like the challenge, I just don't have the typical commute with that type of road conditions; but on the rare occasion that i end up in SF stuck on a hill in traffic, I don't like risking it.

ZionsWrath · 05-08-2016, 06:01 AM

I imagine it is like cruise control or something. Cheap and easy for the manufacturer to add a switch and program the ECU for it. But a bit more involved if you trying to DIY.

Funny enough the Genesis R Spec with no cruise control was the biggest turn off to me about that car

continuecrushing · 05-08-2016, 02:57 PM

Naw no interest here! Use the ebrake lol

churchx · 05-08-2016, 03:04 PM

After all, it's one of things that should be tought to get licence, no?

steve99 · 05-08-2016, 03:40 PM

Quote:

Originally Posted by Zardoman

Hi Guys,

I found out about this technology when I went on my recent trip to Ireland. I rented a car (Ford Fiesta 2015/16 base model), and noticed that when I was on a hill, and when I release the brake while engaging the clutch, the car will not slide backwards, at first I thought it was my awesome clutching, but then I tested and realized it was HAC..

Now my question is, for a such economy car and it was able to have this feature, should it be easy to do a retrofit to our cars? I know the 2017s will have them, so wanted to see if anyone has already done/planning to to a HAC to prior 2017 models.. I am interested!

Thanks,

It possible it could all be done with software using existing hardware

however I doubt anyone is going to spend the time to hack the ABS system and write code for engine and ABS/VSC control units, and it likely a legal minefield to alter ABS safety system code to get it to apply brake when 0 speed detected and clutch depressed, then release on throttle clutch released and speed above zero.

DJCarbine · 05-08-2016, 04:03 PM

I remember reading about this feature on older subarus, they were a mechanical system and people would sometimes have the problem of the brakes not releasing when they should, or getting stuck.

One less thing to break, less complicated, etc. etc.

05-08-2016, 03:21 AM	#8
ZionsWrath Thanks Join Date: Apr 2013 Drives: BRZ Location: NY Posts: 4,163 Thanks: 5,989 Thanked 3,100 Times in 1,498 Posts Mentioned: 38 Post(s) Tagged: 3 Thread(s)	I bet it is way more expensive to retrofit than you think. It's a cute feature but I wouldn't pay $ for it. __________________

05-08-2016, 06:01 AM	#10
ZionsWrath Thanks Join Date: Apr 2013 Drives: BRZ Location: NY Posts: 4,163 Thanks: 5,989 Thanked 3,100 Times in 1,498 Posts Mentioned: 38 Post(s) Tagged: 3 Thread(s)	I imagine it is like cruise control or something. Cheap and easy for the manufacturer to add a switch and program the ECU for it. But a bit more involved if you trying to DIY. Funny enough the Genesis R Spec with no cruise control was the biggest turn off to me about that car __________________

05-08-2016, 04:03 PM	#14
DJCarbine Thupercharged Join Date: Mar 2013 Drives: 2013 FR-S Location: La Grange Park, IL. Posts: 1,501 Thanks: 116 Thanked 751 Times in 439 Posts Mentioned: 23 Post(s) Tagged: 0 Thread(s)	I remember reading about this feature on older subarus, they were a mechanical system and people would sometimes have the problem of the brakes not releasing when they should, or getting stuck. One less thing to break, less complicated, etc. etc. __________________ 2013 FRS Vortech V3 11psi Revworks UEL - PLM Overpipe - MOTIV catted frontpipe - Invidia Q300 2019 Series.Grey STI - Stage1+ SF

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05-07-2016, 10:23 PM	#2
Teseo Senior Member Join Date: Jun 2014 Drives: frs Location: Gunsai Posts: 4,877 Thanks: 7,146 Thanked 2,922 Times in 1,769 Posts Mentioned: 23 Post(s) Tagged: 2 Thread(s)	IIRC 2012 and up Camaro have that feature. I noticed when my coworker gave me a ride on a zL1

05-08-2016, 12:16 AM	#3
humfrz Senior Member Join Date: May 2013 Drives: 2013 FR-S, white, MT Location: Puyallup, WA Posts: 29,866 Thanks: 28,787 Thanked 31,813 Times in 16,424 Posts Mentioned: 708 Post(s) Tagged: 2 Thread(s)	Not really. I figure that anyone that needs that on a car, should have gotten a car with an automatic transmission. humfrz

05-08-2016, 12:19 AM	#4
PandaSPUR PandaPandaPandaPandaPanda Join Date: May 2014 Drives: 2015 BRZ Limited CWP Location: New York City, NY Posts: 1,432 Thanks: 776 Thanked 697 Times in 438 Posts Mentioned: 12 Post(s) Tagged: 1 Thread(s)	TBH I would still love that feature for when I'm stuck in traffic on a hill. But no, never thought of even looking for a retrofit.

05-08-2016, 12:42 AM	#6
_gt86_user Inactive Join Date: Mar 2015 Drives: . Location: . Posts: 289 Thanks: 40 Thanked 84 Times in 65 Posts Mentioned: 0 Post(s) Tagged: 1 Thread(s)	Nope.

05-08-2016, 12:52 AM	#7
NLSP Senior Member Join Date: Dec 2013 Drives: 2014 Ultramarine FR-S Location: Vancouver, BC Posts: 517 Thanks: 414 Thanked 543 Times in 244 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Nah. Using the handbrake works just as good.

05-08-2016, 02:57 PM	#11
continuecrushing Join Date: Mar 2013 Drives: 2013 Firestorm FRS Location: Lake Elsinore, CA Posts: 2,707 Thanks: 1,231 Thanked 2,144 Times in 1,003 Posts Mentioned: 73 Post(s) Tagged: 2 Thread(s)	Naw no interest here! Use the ebrake lol

05-08-2016, 03:04 PM	#12
churchx Senior Member Join Date: Mar 2015 Drives: 2014 GT86 Location: Latvia, Riga Posts: 4,333 Thanks: 696 Thanked 2,085 Times in 1,436 Posts Mentioned: 53 Post(s) Tagged: 1 Thread(s)	After all, it's one of things that should be tought to get licence, no?

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