97 Standard with IS ECM

[Chrisj CMA]

Question for anyone who had changed to an IS ECM on a Standard or Tourer, what was the change?

[bill-jr]

I changed mine didnt notice any change . . .
I told myself its a little peppy’er but prob just in my head .  .

[Bagger John - #3785]

I've run them on every non-I/S Valkyrie that I owned over the years. No, it's not the equivalent of putting a blower on the bike - but the power difference right off idle to around 4K is noticeable. As a bonus, you don't have to run premium gas as you do with some Trigger Wheels.

My standard recipe, as posted many times in the Tech section: I/S ICM, #38 pilots w/ air screws 1 1/2 turns out, I/S carb springs, Dynojet jet needles w/ clips in the 2nd notch from top. No other air filter, smog or exhaust mods.

So equipped, the 49-state '01 I/S gets around 30-32MPG @ 80MPH and accelerates very hard through the motor's mid-range. My CA-model Tourer (all smog plumbing intact, and CA-spec cams) accelerates harder than it did before the ICM swap...but most noticeable was the gas mileage increase. It'll now return 40+ MPG at 75MPH day in and day out...this pushing a bat wing and I/S trunk through the air.

[F6Dave]

I have both a '98 Tourer and '99 Interstate.  The IS does seem a bit stronger at low RPM despite the extra weight.  It also gets slightly better mileage.

The downside is that in hot weather, the IS engine will knock a little on regular fuel.  At this altitude 'regular' is only 85 octane, and 'mid-grade' is 87.  So I have to pay more and run mid-grade in my IS, while the Tourer is perfectly happy running that 85 octane junk.

[Chrisj CMA]

I have both a '98 Tourer and '99 Interstate.  The IS does seem a bit stronger at low RPM despite the extra weight.  It also gets slightly better mileage.

The downside is that in hot weather, the IS engine will knock a little on regular fuel.  At this altitude 'regular' is only 85 octane, and 'mid-grade' is 87.  So I have to pay more and run mid-grade in my IS, while the Tourer is perfectly happy running that 85 octane junk.

Well after hearing all these comparisons I think I will crack open the timing belts cover to see if I can verify it has a stock wheel.  

I'm still learning towards the Bruce bike having a IS ICM.  I like the ride both ways. It gives each bike their own personality.