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[tagline57]

Can I run S&S 583 EZ cams with the S&S 110 kit?

[prodrag1320]

sure,just set the compression @ 9.8-1.chamber will have to be opened up a bit to do that,not a big deal,we do it all the time here on our 107" kits that need less compression than flat tops will yield

[tagline57]

So I understand you correctly...the combustion chamber in the heads need to be machined to increase their volume.  I'm assuming if that's the case I should most likely have the heads rebuilt with the 110 kit with better valves, springs.  Should I also have them ported & polished?

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[tagline57]

or would it be better to simply purchase a set of 89cc heads from S&S?

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[HD Street Performance]

Personally it is not the approach I would take. The S&S kit is 10.5:1. Use another cam. If you want to optimize the performance and /or if the heads have some miles on them then you can address that with just a valve job or porting as your budget and requirements require.
An S&S 585 cam is right at home at that compression and with that combination, the right pipe and tune will make in the teens for power and 120 torque with a flat torque curve, still stock throttle body heads and injectors. At this level the items in the way are all the stock items and to step up another 10+ and 5 it would take changing the TB, porting the heads, and larger injectors.

[tagline57]

Problem is I just had the 583EZ cams installed.  They might have 1k miles on them

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[HD Street Performance]

You could ebay them or send the pistons to Rebco and have them dished -10cc. $40 each.  Use the .045 gasket that comes in the kit. This solution will work and is cost effective.

That cam works best as a bolt-in for a stock 96" in a dyna or softail. It is shorter than a SE255. The large number in the S&S lineup is a misnomer and confuses some people, this is a very short 203° 18° close cam, nothing even close to the 570 and 585 that it sits next to in their catalog.

[prodrag1320]

Problem is I just had the 583EZ cams installed.  They might have 1k miles on them

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583 are nice cams for low rpm touring builds,we use a lot of them.but they should be set at 9.8-1.570 should be set at 10.0-1 and are good midrange (2500- 5000) cams,585 are higher rpm (3000-6000) and should be set at 10.5-1.all are very nice grinds for their application,but shouldn't be confused with each other,all 3 very different

[TorqueInc]

Problem is I just had the 583EZ cams installed.  They might have 1k miles on them

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You won't be the first person to not plan ahead camshaft wise

If you don't plan on doing a little headwork,cam change with the 110 kit

Leave it alone and ride it

Plenty of other cams not made by s&s.....that work exceptionally well

[prodrag1320]

So I understand you correctly...the combustion chamber in the heads need to be machined to increase their volume.  I'm assuming if that's the case I should most likely have the heads rebuilt with the 110 kit with better valves, springs.  Should I also have them ported & polished?

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opening up the chambers is not a big deal at all,dishing the pistons isn't a big deal either.for the583 cams,doing touring type porting is a good idea.we do a lot of 583/107" bulds with very nice results (I run 583`s in my personal 98" ultra,very nice power from 1700-5000 with our touring street port headwork)as far as using the 585 because they will match your compression better (they will) but the 583 & 585 are two completely different cams,im assuming you chose the 583 for the low rpm power of the cam,well the 585 is the exact opposite,making power at higher rpms.feel free to give a call on this,i can answer any questions you have,easier than going back & forth on here

[tagline57]

I put the 583 cams in because of the HP/TQ increase from 1500 - 4500 rpm.  It's funny that people put  a cam that runs between 3000 - 6000 rpm. That's fine if you're drag racing, but 99% of people ride below 3000 rpm.  Doesn't make sense to me for a road bike.  I have a little over 32k on the bike currently.  I am considering putting a 103 hot kit (+.010) and having the heads rebuilt.

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[Tail Rider]

570 should be set at 10.0-1 and are good midrange (2500- 5000) cams

Kinda confused on this some...with a 40 IVC, why would or wouldn't a little higher compression ratio of say 10.4:1 be more beneficial? ...as compared to say, a Wood's TW7H with the same IVC

[prodrag1320]

We've set the 570's at 10.25-1,10.4-1 would be squeezing it pretty hard.we set the 7H at about the same (10.0-1 to 10.25-1)

[Tail Rider]

What number is good to shoot for as far as CCP? It looks like a static 10.2:1 cr (9.4 corrected) would give slightly less than a 195 ccp at sea level.

Figuratively, a stock '14 Rushmore 103HO at a 10:1 would give a 200.3 ccp with a 30 IVC...Similarly with a 10.4:1 with a 40 IVC would put it relatively close with a 200.7 ccp. I do realize this isn't a 110 CVO, but what differences would dictate a nominal ccp?

[HD Street Performance]

What number CCP? Well first you have to understand that the calculators are not dead accurate due to cam timing (seat to seat) differences plus advertised values are just that, actual fluid measurements are what will give you the data you need  not hypotheticals. That said the 570 will work fine from 10:1 to 10.5:1. At 10.5 that would be premium only and no lugging and a great tune-up with timing changes. Head fans recommended. CCP, 190-205 will be fine.

[Tail Rider]

I understand the guideline part and it gives an idea of what to shoot for...Ill let the Indy do the final numbers. Nominally looking to shoot for 195-200 +/- a couple points depending on the variants, once started. I guess my thought was that, what was used as "stock" for a ccp, then a performance build should be able to be built to that...not really looking to exceed it. Like, doing a "bolt-in" cam and not seeing the expected power gain because the heads remain stock and your ccp is now 12# lower

[HD Street Performance]

The CCP is just another number out of the context of the whole combination. Better to focus on that rather than paying too much attention to what it will crank. That guarantees nothing. The items that often get sent down the line which should be higher are the pipe choice and the tune.

[hrdtail78]

In my experience upping the compression to 10.4 over 10 on the 570 doesn’t improve low end to much.  Yes, it does improve it but the improvement is seen more mid and top.  It just doesn’t hold on to the exhaust long enough.  I’d look at the tman 580 if looking at that compression and want more low end.

......and do not overlook exhaust choice.