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Old 02-27-2012, 05:14 PM   #1 (permalink)
Seasoned Rider
 
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cam recomendation

Engine
2003 Twin Cam Road King
S&S 95" Jugs
S&S 92-1200 pistons
S&S Super Stock Heads 79CC
compression ratio 10.1 - 10.5
S&S 52mm fuel injection kit
Gear driven Cams
Exhaust S&S True power duals with SPO mufflers
I'm looking at S&S 585 or 583 EZ Start cams
I want the best bottom end Really 1500-4000rpm.
From what iv read the 583 is for 1500-5000rpm and the 583 is 3000-6500rpm. I want a street bike not a drag bike and bottom end torque is what I need. Tuner has recommended 585s
I currently have a 88ci with Andrews 37G cams. Should I stick with the 37G cams or should I go to the EZ Start cam with my increased compression when I do the 95ci kit. Right now my bike has not much bottom end but at 3500rpm it takes off like a bat out of hell and I hate that. I want a smooth power band.
I ride In the hills and interstate 55-80mph.

Last edited by DontTreadOnMe; 02-27-2012 at 07:05 PM.
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Old 02-27-2012, 05:24 PM   #2 (permalink)
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Quote:
Originally Posted by DontTreadOnMe View Post
Engine
2003 Twin Cam
S&S 95" Jugs
S&S 92-1200 pistons
S&S Super Stock Heads 79CC
compression ratio 10.1 - 10.5
S&S 52mm fuel injection kit
Gear driven Cams
Exhaust S&S True power duals with SPO mufflers
I'm looking at S&S 585 or 583 EZ Start cams
I want the best bottom end Really 1500-4000rpm.
From what iv read the 583 is for 1500-5000rpm and the 583 is 3000-6500rpm. I want a street bike not a drag bike and bottom end torque is what I need. Tuner has recommended 585s
I currently have a 88ci with Andrews 37G cams. Should I stick with the 37G cams or should I go to the EZ Start cam with my increased compression when I do the 95ci kit. Right now my bike has not much bottom end but at 3000rpm it takes off like a bat out of hell and I hate that. I want a smooth power band.
I ride In the hills and interstate 55-80mph.
I am partial to the 37 cams in a 95 build, 10 to 1 is the max I would ever run with that cam and you will have to have a good tune at that comp but you will get the power you seek, the 585 is definitely too late and I really have not seen much on the 583's as of yet.
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Old 02-27-2012, 05:55 PM   #3 (permalink)
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from my p.o.v., 1500 rpm is lugging the engine if in any gear above 2nd.

For what you want... you need a lot more displacement than 95".

I'm currently doing a mild 117" build right now for the same purpose you have. I had a great running 95", that made a very nice torque curve, from memory it was at or over 100 ft-lbs from 2250 to 5300 rpm. But it wasn't enough, especially with a load on the bike and in the hills.
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Old 02-27-2012, 06:10 PM   #4 (permalink)
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I always ride were i can feel the engine in not lugging. I shift at 3000 when cruising but I just dont want a cam that is sluggish low in the rpms then takes off. I dont like it. I dont need the most hp just a flat tq curve. Do you mean by I need alot more displacment that the heads are to big? I will have it dyno tuned.

Last edited by DontTreadOnMe; 02-27-2012 at 06:25 PM.
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Old 02-27-2012, 06:49 PM   #5 (permalink)
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Do you mean by I need alot more displacment that the heads are to big? I will have it dyno tuned.
No. I mean a 95" isn't big enough for what you want as an end result. More displacement is the answer. You have to decide whether you want to do this twice.
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Old 02-27-2012, 07:03 PM   #6 (permalink)
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I'm not doing a stroker. I think ill be plenty happy with the 95ci. I'm looking at 110hp 110ftlbs if i stayed with the 37G. My tuner is building the same set up I'm looking at with 585 cams. said i should be better then what that does because I have the better exhaust. With the 10.3 or so compression do I need a decomp?
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Old 02-27-2012, 07:20 PM   #7 (permalink)
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this is my 88 stock and now. The dip sucks
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Old 02-27-2012, 08:18 PM   #8 (permalink)
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Quote:
Originally Posted by DontTreadOnMe View Post
I'm not doing a stroker. I think ill be plenty happy with the 95ci. I'm looking at 110hp 110ftlbs if i stayed with the 37G. My tuner is building the same set up I'm looking at with 585 cams. said i should be better then what that does because I have the better exhaust. With the 10.3 or so compression do I need a decomp?
generally speaking, a 95" motor with the 37 cam will not get anywhere close to 110hp, unless you're really squeezing it. Not saying it can't be done but it inherently would not be the motor characteristic you desire, in fact, it would be more like the thing you don't like.

Your parts list you posted with all the S&S parts (except the 583 cam) is counter to what you desire. You don't need 1.94" intake valves in those S&S heads for a 4000 rpm motor.

Did you read the "sticky" on how cams work at the top of this section???? What you want is a cam with a shorter intake close timing to help make more torque in the lower rpm band.

If you are hell bent on a 95" motor, I would keep your existing heads and have them refreshed and get a good street port job done. I would probably consider an Andrews 26 cam or something in that 30* to 35* ABDC intake close range. You do not mention your current pipe but that is what is causing the power dip you don't like, so you would need to pick a new pipe that does not cause that type of dip.

It's much easier to get the low end torque you desire with a larger displacement motor without all the stress and fuss. Like it or don't. There's about a 5 year trail here in this forum where folks do the 95" and then realize later they should have gone bigger and then end up paying for two motors to get the one they really wanted. Just saying.

All the best!
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Old 02-27-2012, 08:29 PM   #9 (permalink)
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the 95 kit and heads are already ordered
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Old 02-27-2012, 08:34 PM   #10 (permalink)
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tuner said its the low stock compression that is causing the dip S&S power tune duals and SPO mufflers are my current exhaust.
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Old 02-27-2012, 08:50 PM   #11 (permalink)
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Subscribing, I have the same cams going in mine as we speak and am thinking of the 95’’ kit with heads next winter.
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Old 02-27-2012, 09:01 PM   #12 (permalink)
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that has a 2 into 2 exhaust and is what I would say causes the dip. it may not be so bad with more compression, but its still going to be there.
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Old 02-27-2012, 09:06 PM   #13 (permalink)
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you have 585 cams going in a 88ci? My tuner has the same set up he recomended to me on the dyno tomorrow so in a few day ill post the resalts of that one.
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Old 02-27-2012, 09:12 PM   #14 (permalink)
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yes 2 into 2 with cross over
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Old 02-27-2012, 09:27 PM   #15 (permalink)
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[QUOTE=DontTreadOnMe;2096166]you have 585 cams going in a 88ci?QUOTE]

no i have the 37g's going in, hoping for fun results but i do plan to go 95'' next. this is just the first step on mine.

i would say stick with the 37's due to all the good feedback from 37 and 95'' together
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