jray3
Posts: 1353
Joined: Tue Dec 06, 2011 1:05 am
Location: Tacoma area, WA
Contact: Website

Re: H&R Spring Suspension Modification

Fri May 16, 2014 12:31 pm

An Open Letter to H&R Springs, originally submitted on 4/10/14 to info@h-r.com

Hello,

I have fitted a full set of your #28911-1 lowering springs onto my 2012 model USA-spec Mitsubishi i-MiEV. I'm aware that the springs were designed for the Euro-spec car, which is narrower and has less mass. However, I'm hoping that you'll appreciate some customer input, and be interested in developing springs for the USA-spec car.

I haven't put the car on an alignment rack yet, but have not been able to measure any difference in front camber in my home garage. Handling is improved, and I greatly prefer the ride quality of your springs.

However, the rear end poses a problem. With an actual lowering result of 38 mm, the wheel driveshafts measured at a 4 degree upwards angle from transaxle to wheel hub. As I understand, that's too much angle for a CV joint, and I immediately felt a vibration when the car squats under acceleration or is fully loaded. I think that the CV bearings were hitting against the end of their races. To remedy this, I've added 19 mm spacers to the tops of the springs, but still feel a slight rumble under the high-load conditions. It would seem to me that with a wider rear track, the US-spec car would experience less of a change in driveline angle than the Euro-spec car, though that could be overwhelmed by increased mass. I also have a 40 lb trailer hitch mounted on the car.

Any thoughts you can offer will be appreciated. I am a very active owner, so please be advised that this correspondence may be posted to the worldwide http://www.myimiev.com forums.

Sincerely,

Jay Donnaway
2012 i-SE "MR BEAN" 70,000 miles
i-ES traded at 21,648 miles
2000 Honda Odyssey
1987 F250 Diesel
1983 Grumman Kurbwatt,170 kW, 32 kWh
1983 Mazda RX-7 EV 43 kW 10 kWh
1971 "Karmann Eclectric" EV 240 kW 19 kWh
1965 Karmann Ghia Cabriolet

Hornstudio
Posts: 3
Joined: Thu May 15, 2014 12:33 pm

Re: H&R Spring Suspension Modification

Fri May 16, 2014 1:47 pm

this is more or less disappointing because the ride and feel is awesome (which I told the engineer on the phone). it was all about 500 US$ including installation and alignment and I did not think that H&R disappoints me as a supplier of Rinspeed which is a genius. BTW: I dont think there is a difference on the European and US i-MiEV besides the plastic moldings...

So how does Mitsubishi lower their Pikes Peak i-MiEV? KONI?

Image

https://www.flickr.com/photos/mitsucars ... /lightbox/

jray3
Posts: 1353
Joined: Tue Dec 06, 2011 1:05 am
Location: Tacoma area, WA
Contact: Website

Re: H&R Spring Suspension Modification

Fri May 16, 2014 2:07 pm

I didn't remember that the Beccy Gordon Pike's Peak car was a US version- wider car with dual windshield wipers, etc.. In that case, I want that front splitter! (The front tow loop might be nice too for some emergency pull-charging.) I'd bet they did that 'cause of the wider wheelbase. Wish they had come up with a rear duckbill 'spoiler' for drag reduction as well.
2012 i-SE "MR BEAN" 70,000 miles
i-ES traded at 21,648 miles
2000 Honda Odyssey
1987 F250 Diesel
1983 Grumman Kurbwatt,170 kW, 32 kWh
1983 Mazda RX-7 EV 43 kW 10 kWh
1971 "Karmann Eclectric" EV 240 kW 19 kWh
1965 Karmann Ghia Cabriolet

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