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[Pan1]

Has anyone used the HD smart tuner with a TTS 250 cam or another aftermarket cam in a stage IV M8 build? I am trying to keep the warranty and still get additional performance.

[grc]

Has anyone used the HD smart tuner with a TTS 250 cam or another aftermarket cam in a stage IV M8 build? I am trying to keep the warranty and still get additional performance.

I'm not sure how you could keep the warranty after modifying the engine with an aftermarket cam and altered tune.  Any alteration to the street legal kits or tune by definition will not be street legal and thus would be grounds to void the powertrain warranty.

Jerry

[Pan1]

When the local dealership plugs the bike into HDs magic box to see if the ECM has been altered by an aftermarket tuner it will read No. The local dealer will not void the entire drive train warranty if I only change the Cam and everything else is HD stage 4

[Para Bellum]

When the local dealership plugs the bike into HDs magic box to see if the ECM has been altered by an aftermarket tuner it will read No. The local dealer will not void the entire drive train warranty if I only change the Cam and everything else is HD stage 4

Short story:  I wanted to keep the warranty and install the HD Stage 3 kit for the extra displacement, but use the HD torque cam from Stage 2 to keep the low end TQ.  Problem:  HD does not have an EPA-approved fuel map (tune) for that combination...so any map at all means No Warranty.

Two things: (1)  I've been told by a very good tuner that the HD Pro Street Tuner can't be adjusted outside the EPA-approved values; (2)  If any other dealer looks at the actual map, they will see it is not one of the EPA-approved maps (HD only has a few of them), and they probably will void your warranty right then; (3)  your home dealer is committing a huge violation of the HD-EPA court settlement by not voiding the warranty, which could lead to huge fines and the wrath of HD corporate.  Frankly, I'm surprised your dealer is willing to risk that...and for sure they won't put that in writing.

[FLSTFI Dave]

The HD smart tuner is an EPA compliant tuner.  It can not make a change to timing or fuel delivery big enough to work correctly with s TTS 250 cam.

I doubt that it would get enough fuel to support that cam, and it probably won't be able to get the timing right either.  It has barley enough adjustment for the HD EPA cams.