Have an email out to them regarding specs, price and availability. Waiting for reply. I guess fall has come early. So glad I held off on the Indian cams on the advise of a knowledgable source.


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So glad I held off on the Indian cams on the advise of a knowledgable source.

Care to share what that means?

 

Pretty much what I was wondering/figured - how much of a performance gain there is with the indian cams. I'd like to see specs on all of the options. In due time I reckon.

 

So I heard back from Andrews and they sent me the specs on their cams. Looks like they will have 2 based on the part numbers. They didn't have prices yet and said they will be about a month away.

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That format is awkward to read. Make no sense.

 

Can someone translate that into laymans terms for me, with regard to comparison to both stock cams and Indian stage 2 cams?

 

I wonder if they have compression release lobes. If not...will they work with stock starter and battery?


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I wonder if they have compression release lobes. If not...will they work with stock starter and battery?


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That's the same question that came to me Dave...

If S&S developed the compression release cams for Indian and they have a joint patent, how are other AF cam companies going to get around this?

I suppose they could develop their own release but would it be an infringement...

 

They do not have compression releases as far as I can see, no grooves or pop-ups for the mechanism.

 

I'm wondering about available colors.
I dang sure don't want to buy another pair of elephant skin boots to coordinate my wardrobe.

 

Better believe Indian corporate is trying to halt this. Otherwise these would have been out. The compression deal is the whole issue for many. Like me. It is death on battery's and starters and Indian does not want their warranty f'd up because of this. I imagine there is a lot of attorneys involved as we speak here.

I always said ..............wait a few years. More coming after these get cleared or made

 

there is no patent or other restriction keeping Andrews or other from making replacement cams without that specific type of centrifugal compression release. There are several other type of cent. comp. releases that are fair game. However, it may be possible for the Andrews cams to work without a comp release. How? When comparing cams the first number pro-engine builders, like myself, look at is the intake valve close degrees. Why? because when cranking (and running) the engine doesn't make compression until the intake valve closes. The closer to BDC the intake valve closes, the more dynamic / cranking compression the engine will have. The stock cam closes at 30° ABDC, leaving 150° of piston motion to create compression. The Andrews closes at 36° ABDC, leaving 144° piston motion to make compression; so the engine will have slightly less cranking compression.
The intake valve close timing also effects the torque curve, and HP limit. Earlier int vlv closing (Fewer degrees ABDC) makes more TQ over a wide low to mid rpm range; but it also limits the engine volumetric efficiency at higher rpms, where the TQ & HP fade, with the effect on HP being greater. A 6° later int. vlv closing will typically shift the torque curve 150-200rpm higher, with low rpm TQ being less, while high rpm TQ & HP being greater.
Adding a bit extra lift helps offset the effect of an early intake closing, but there is a limit due to mechanical stresses within the valve train. Another trick we use when designing a cam is to alter the cam's profile, to increase lobe intensity. Lobe Intensity measures the acceleration / decel of the valve during the initial opening and closing. Again, mechanical stress limits how fast we can open or close the valve.
By delaying the intake valve closing 6° the cranking compression is reduced by approx 0.5:1, which may be enough to eliminate the need for a compression release for starting.
respects,
Tom - AMS-HyLift Lifters

 

Thanks for the detailed breakdown Tom.


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Great information and it sounds like you are an expert in this area which I appreciate. I guess the bottom line is if the bike will turn over and start will this cam configuration increase hp, response or torque? Of course we hope Polaris still honors our 5 year warrantees......

 

Um...., no, don't see why Polaris would even consider honoring warranty on an engine with non-polaris cams installed - Dan

 

Could be interesting here so subscribing even though don't have a 111 (yet) But when added the Andrews TW21 Cam to the 2005 Dyna the Lift went from .473 (stock) to .498 and Duration from 216/219 to 220/ 228 and Gave a Nice Torque Increase from the 2,000-3,000 RPM Range which is where I wanted it .. No Problem starting it didn't even notice the difference there ..

 

Hopefully the TS111 will have no issues starting with these cams. One of the guys I've ridden with bought a very sharp CVO Ultra used. Don't know what cams or compression its running, but it can be an adventure getting it started. Tries to kick back. If I'm parked next to him I let him start his first so he can hear what's going on. Sometimes it takes 5 or 6 tries before it starts. Then I touch my button and we head out - Dan

PS - I'll keep my Stage 2, easy starting, non-clacking TS111 the way it is. 38 months of warranty remaining. Very happy.

 

Installing these non factory cams will definitely void the bikes warranty.

 

really digging those ... (out of warranty anyway [emoji13] )

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My warranty was for only 2 years being that I have a 2015 Chieftain. I am following along on this cam thing. I would like a more aggressive cam, so I'm waiting for the dust to settle somewhat.