S&S easy start 583 cam??
Stage I
Joined: Sep 2018
Posts: 1
Likes: 0
From: St Antoine de l'abbaye
Had not thought of the higher lift cams causing additional load on the starter ... makes sense ... the additional force of overcoming the valve springs at the marginal spring rate beyond stock .473/.474 ... (does not seem like it would be that much) ....
However, I do not see why cams alone would increase the "static compression ratio" ... the def is the combustion chamber volume divided by the swept volume of the cylinders plus the combustion chamber volume ... nothing in that equation is changed by higher lift cams ...
If anything, my understanding is that the dynamic compression ratio could be decreased a little due to increase in overlap of Int/Exh of the replacement cams ....
What am I missing ...?
However, I do not see why cams alone would increase the "static compression ratio" ... the def is the combustion chamber volume divided by the swept volume of the cylinders plus the combustion chamber volume ... nothing in that equation is changed by higher lift cams ...
If anything, my understanding is that the dynamic compression ratio could be decreased a little due to increase in overlap of Int/Exh of the replacement cams ....
What am I missing ...?
I am looking at putting the 583 sns am into my bike Is there any problème with the original valve spring? Does it need to be replaced or original part are OK?
Tx for the response
Stellar HDF Member
Joined: Mar 2017
Posts: 3,303
Likes: 1,871
From: Conn.
Tourer
Joined: Apr 2018
Posts: 295
Likes: 111
From: Medina, Ohio
+1 on the 583's. Great all around cam. I did the quickee pushrods and new lifters from S&S. I've been running it all summer. The bike should run like this from the factory. I also did the powervision which helped dial the bike in further. I had a fuelpak at first and I spots in the throttle where the bike fell flat. Good luck and check runout at crank pinion shaft. Should be below .030 or stick with chain drive.
Stellar HDF Member
Joined: May 2010
Posts: 2,864
Likes: 126
From: Aussie lost in Switzerland
I installed 583 ezy starts on my 103 build, love them.
Something Dynojet and V&H DONT tell you.... Auto tune isn't an option on modded cams using just the standard tuner alone, you need the wide band add ons to Autotune Cams.
My only regret is using an FP3 instead of the PowerVision and a dyno tune, or forsake the dyno tune and get the Target tune option to be able to Auto tune with the modded cams.
Just to clarify, nothing wrong with the FP3, it just turns out that finding a Dyno shop on this side of the Pond that can/will tune with an FP3 is akin to finding Rocking Horse poop...
Something Dynojet and V&H DONT tell you.... Auto tune isn't an option on modded cams using just the standard tuner alone, you need the wide band add ons to Autotune Cams.
My only regret is using an FP3 instead of the PowerVision and a dyno tune, or forsake the dyno tune and get the Target tune option to be able to Auto tune with the modded cams.
Just to clarify, nothing wrong with the FP3, it just turns out that finding a Dyno shop on this side of the Pond that can/will tune with an FP3 is akin to finding Rocking Horse poop...
Road Warrior
Joined: Feb 2008
Posts: 1,390
Likes: 127
From: SW OREGON
I wanted more passing power on 2 lane roads and got it with the 583G cams. also added the S&S 97/106 kit and pv1. very happy with the results, never any problem starting but I keep a battery tender on whenever I'm not riding.
2nd Gear
Joined: Oct 2021
Posts: 6
Likes: 1
From: Vancouver BC
I have S&S 585's and they are an upper RPM cam. Comes on about 4000 and climbs like crazy to 6500. It's got pretty good grunt (torque) but it is higher up in the RPM range. I know H-D 211's have good low end torque and lots of guys on here love the Woods cams. I'm sure they will speak up about YOUR decision.
2nd Gear
Joined: Oct 2021
Posts: 6
Likes: 1
From: Vancouver BC
Chart states 583*
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