Did I pick the wrong cam?
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From: SWFL
Did I pick the wrong cam?
I had a SE-3 cam installed in my 99 FXR2. Picked that cam for two specific reasons. 1) its drop in and can use stock solid push rods and 2) its almost identical specs to the popular Andrews EV27 cam that everyone seems to like.
This morning I called the dyno shop my dealer sends bikes to, Rosa's Cycles on Long Island, NY. They are supposed to be pretty good, the best in the area at very least. Anyway, I called to check status, and they said it was done. He said they were, and then asked me what cam was in it. I told him, and he responded with "that's not the cam I would have chosen". When I asked why, he said there was a torque dip at around 2500rpms. I get that the cam is speced for most power 3-5000, but his comment concerned me. I haven't rode it yet, so I can't comment on how it feels, but as I said, I didn't like the sound of that.
Anyway, I'll post the chart and my impressions of it once I get it home.
This morning I called the dyno shop my dealer sends bikes to, Rosa's Cycles on Long Island, NY. They are supposed to be pretty good, the best in the area at very least. Anyway, I called to check status, and they said it was done. He said they were, and then asked me what cam was in it. I told him, and he responded with "that's not the cam I would have chosen". When I asked why, he said there was a torque dip at around 2500rpms. I get that the cam is speced for most power 3-5000, but his comment concerned me. I haven't rode it yet, so I can't comment on how it feels, but as I said, I didn't like the sound of that.
Anyway, I'll post the chart and my impressions of it once I get it home.
I had a SE-3 cam installed in my 99 FXR2. Picked that cam for two specific reasons. 1) its drop in and can use stock solid push rods and 2) its almost identical specs to the popular Andrews EV27 cam that everyone seems to like.
This morning I called the dyno shop my dealer sends bikes to, Rosa's Cycles on Long Island, NY. They are supposed to be pretty good, the best in the area at very least. Anyway, I called to check status, and they said it was done. He said they were, and then asked me what cam was in it. I told him, and he responded with "that's not the cam I would have chosen". When I asked why, he said there was a torque dip at around 2500rpms. I get that the cam is speced for most power 3-5000, but his comment concerned me. I haven't rode it yet, so I can't comment on how it feels, but as I said, I didn't like the sound of that.
Anyway, I'll post the chart and my impressions of it once I get it home.
This morning I called the dyno shop my dealer sends bikes to, Rosa's Cycles on Long Island, NY. They are supposed to be pretty good, the best in the area at very least. Anyway, I called to check status, and they said it was done. He said they were, and then asked me what cam was in it. I told him, and he responded with "that's not the cam I would have chosen". When I asked why, he said there was a torque dip at around 2500rpms. I get that the cam is speced for most power 3-5000, but his comment concerned me. I haven't rode it yet, so I can't comment on how it feels, but as I said, I didn't like the sound of that.
Anyway, I'll post the chart and my impressions of it once I get it home.
Lots of guys with lots of opinions out there.
Your *** will tell you if it's right or not.
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Joined: Oct 2005
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From: Canton, Michigan
For real world comparison, I've been running an EV27 in my 1993 ElectraGlide Sport since 1994. I'm actually on my second EV27 (first one was starting to crystallize). A lot of internet opinions are that the bike is too heavy for that cam, but it works perfect for the type/style of riding I do.
I'd want to see the dyno printout to see what they are talking about. You will get a small 'flat spot' around 3000 rpm as the CV carb transitions from the slow speed circuit to the high speed circuit. It can be tuned to minimize. It's barely noticeable, to the point you will need to 'find it', to recognize it.
Did they re-tune the carb with the cam install?
Also, I'd highly recommend installing an aftermarket ignition module to take advantage of the cam. I've been running a Dyna2000 since the cam was installed in 1994.
Last edited by Hackd; May 11, 2018 at 11:16 AM.
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From: SWFL
^^^ What they said.
For real world comparison, I've been running an EV27 in my 1993 ElectraGlide Sport since 1994. I'm actually on my second EV27 (first one was starting to crystallize). A lot of internet opinions are that the bike is too heavy for that cam, but it works perfect for the type/style of riding I do.
I'd want to see the dyno printout to see what they are talking about. You will get a small 'flat spot' around 3000 rpm as the CV carb transitions from the slow speed circuit to the high speed circuit. It can be tuned to minimize. It's barely noticeable, to the point you will need to 'find it', to recognize it.
Did they re-tune the carb with the cam install?
Also, I'd highly recommend installing an aftermarket ignition module to take advantage of the cam. I've been running a Dyna2000 since the cam was installed in 1994.
For real world comparison, I've been running an EV27 in my 1993 ElectraGlide Sport since 1994. I'm actually on my second EV27 (first one was starting to crystallize). A lot of internet opinions are that the bike is too heavy for that cam, but it works perfect for the type/style of riding I do.
I'd want to see the dyno printout to see what they are talking about. You will get a small 'flat spot' around 3000 rpm as the CV carb transitions from the slow speed circuit to the high speed circuit. It can be tuned to minimize. It's barely noticeable, to the point you will need to 'find it', to recognize it.
Did they re-tune the carb with the cam install?
Also, I'd highly recommend installing an aftermarket ignition module to take advantage of the cam. I've been running a Dyna2000 since the cam was installed in 1994.
Dirt don't hurt
Joined: Jan 2011
Posts: 21,062
Likes: 4,547
From: Haslet Texas
I'm willing to bet you won't even notice the dip.
An average rider doesn't run a bike hard enough to worry about what the dyno does.
You had it dynoed so that you know the turn is as good as it's going to get now just ride it!!!!!!!!!!!!!
Seasoned HDF Member
Joined: Oct 2015
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From: Pine Flat Dam/South Bay Area, CA
Some exhaust systems cause a mid range torque dip. It's not always the cam. The stock headers with the crossover pipe with Cycle Shack slip-on mufflers are the best all around system for an Evo. They give you a wide torque curve with no dips.
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From: Poolville
I know Andrew at Rosa's very well and I so trust his ability to tune... To some he might seem a little sharp on the edges but he really does know what he's doing. He's just a little partial to how he likes to make Harley's perform... I've been there several times over the last 12 years...... I'm sure he got the best of it.... Trust me you'll love it.. If you ever want to ride ,PM me I'm just down the street from you...
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Many people will over-cam an existing engine, and at the 36 degree or so, intake closing number of that SE-3, that OE compression Evo will have an odd spot in it.
A 30 intake close such as an Andrews 23, or Andrews 13 is a better plug/play.
Scott
A 30 intake close such as an Andrews 23, or Andrews 13 is a better plug/play.
Scott