Ski-Doo EFI Technology
Dear Motorhead -
Correct me if I am wrong, but "Ski Doo" never made an EFI injection system on a 2-stroke. Old technology. No surprise there.
Thanks for your comment. It concerns me when I realize I've been around long enough to remember not just landmark sleds of the past but obscure ones as well.
To answer your inquiry Ski-Doo (with Rotax) did develop and produce a sophisticated (for its time) EFI system which was fitted on the Rotax Rotary Valve 580cc twin cylinder engine and stuffed into a PRS chassis variant called the "Formula Plus EFI" or more specifically the "Plus EFI".
The sled or more appropriately, the EFI system, was a one hit wonder living as a very limited production (I believe one per dealer - late release) powerplant. It disappeared faster than it arrived.
I may stand to be corrected here but I'm pretty sure the EFI system was developed in cooperation with Mikuni. This was a departure from the JECS systems both Polaris and Arctic Cat used at this time. Oh, what time are we talking about? I believe the "Plus EFI" was officially a 1992 model.
We had a Press Unit here at Supertrax and found it to be a nice improvement over carbs - except for one problem - the system was riddled with glitches which further undermined Ski-Doo's reliability reputation they were working intently at improving in the early 90's.
Everybody who rode the Plus EFI had at least one return trip on the rope. Ski-Doo never fiddled with EFI again until the arrival of the Semi-Direct Injection SDI 600 and 800 Rotax Series III engines in the early 00's.
There's more to the arrival of EFI on snowmobiles that's interesting. I think I'll write a column soon on how costly the patent infringement settlement was between Ron Chastain - owner of Injection Research Services (IRS) and Polaris. It is an interesting 30 year old tale.
More Like This
LATEST VIDEOS View All
2023 Arctic Cat RIOT 9000 ATAC EPS
April 8, 2022
AJ's gives an exclusive review of the 2023 Arctic Cat Riot 9000 ATAC EPS featuring the 998cc ...
2022 Revolutionary Advanced Design Award Winner
April 6, 2022
We award the recipient for this season's Revolutionary Advanced Design (RAD) award, which ...
First Ride On Widescape's WS250 Stand-Up Snowmobile
April 4, 2022
Luke shares his first impressions after getting to ride Widescape's new and unique stand- ...
Dalton Flyweights for Arctic Cat Adapt Primary Clutch
April 1, 2022
AJ looks at some snowmobile clutch modification kits available from Dalton Industries particularly ...
Top Gear View All
March 21, 2022
IPONE MAINTENANCE AND CARELINE PRODUCTS
As the snowmobile season comes to an end, it's always good practice to put your sled away in tip top condition...
Ask Motorhead View All
November 15, 2020
600 EFI, 600 ETEC or 900 ACE?
Mark takes a look at which of these sleds is right for a reader...
Press Releases View All
March 15, 2022
Arctic Cat Announces Pre-Sales Event Date and Previews 2023 Lineup
Pre-sales to move to April, Model Year Offers Options for Every Kind of Rider
Tourism View All
November 3, 2021
Halfway Haven Reopening Averts Major Trail Closures
Halfway Haven is located north of Sault Ste. Marie, on a remote stretch of Trans Ontario Provincial (TOP) Trail D between Searchmont ...