American Motorcycle Dealer AMD 227 June 2018 | Page 47

The contour of the back side of the exhaust valve
is different to the one the factory uses
‘we are reliably
getting around a
40 hp increase’
Indian Performance Solutions (IPS) is the brainchild of Indian Motorcycle of Libertyville, Illinois, business
partners Todd Gaines, left, and Don O’Shea
top-end kit, it will have a price advantage over some
of the other Thunder Stroke 111 performance
solutions that are being talked about, but with
largely similar horsepower and torque gain results.”
INDIAN MOTORCYCLE OF LIBERTYVILLE
Libertyville, Illinois, USA
Tel: [phone]
www.indianmotorcycleoflibertyville.com
combustion chamber, the objective was to raise the
compression ratio - from 9.5-1 stock to 10.5-1 for
our heads with the existing pistons and rings. We also
upgraded the exhaust valve - the contour of the back
side of the valve is different to the one the factory
uses.”
Don says that the plan is, ultimately, to make the
package available as a retail kit, with a tuner and
map for bolt-on and re-flash install. Initially Don says
IPS will focus on sales to other authorized Indian
Motorcycle dealerships.
“As a cylinder head package rather than complete
‘the cam is our
own design’
IPS is seeing gains of around 40 hp and claim around 112 hp and around 125 ft lbs torque - torque
which rolls in at the bottom end with peak torque at around 3,800 rpm
The stock Indian Thunder
Stroke 111 makes 73
hp/103 ft lbs of torque at
the rear wheel
The compression ratio goes up from 9.5-1 to
10.5-1 with the stock pistons and rings
www.AMDchampionship.com
AMERICAN MOTORCYCLE DEALER - JUNE 2018
47