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[wnogood]

Ok, looking for a winter project idea, low buck.

My 103 is due for a refresh, and Im thinking about going to a 107. Can I keep my 48N cams? Im really not looking to blow up the dyno, just a refreshed motor with a little boost in torque. What specs should I be looking to follow to make the 107 work with these cams? (CC heads, head gasket etc)

Thanks for any info....

[GMR-PERFORMANCE]

The compression ratio is going to be rather steep. Comp release would be a must, and fuel quality may be an issue, a stellar tune would be needed ( timing wise mainly)  Or bump to the 107 and install a cam that is more suited to the larger engine.  Not that it could not be done however.. some times its easier to swap the cam and not have to work so hard to get the rest of the job done and it would be simple. Fuel in your area , heat, travel type weight etc all play a role int his. Great fuel low temps yes I think you can do it, hot temps poor gas well that could turn into a issue and you end up spending more time or money to get the job completed with the cam you have. It  ( 48) would sell quick and the cost offset would not me much. A larger air pump will and would like a cam with more duration  than what you have. The 48 is rather small for the 103 in my opinion. Nothing really gained low end wise over other cams however the power curve with the small cam will not extend out as far as several others with a bit more duration. Good luck on the new build.

[HD Street Performance]

That 103, is it a CVO? Model year is?
Thanks

[wnogood]

That 103, is it a CVO? Model year is?
Thanks

Mine is a 2006 cvo ultra. Gmr's is a 2004 cvo Electra. Looks like Andrews 54 cams

[GMR-PERFORMANCE]

That build was a stock cam and had never been tuned so the cylinders where not in great shape and had bad lifters along with cam lobes that had hard face gone. Simple swap clean heads up seals valve job and that was it. Overall I was happy with the outcome and being that the stock t/b was used I thought it had a great power curve. Sure put a huge smile on the customers face. He has over 25,000 miles on the new build and its still going strong.

[wnogood]

GMR, you have a pm....

[gabbyduffy]

                Steve, what cam would you suggest for the 107" build......Wnogood, your in good hands with Steve at GMR...... Always willing to take time out of his day to help a forum member out. 

[GMR-PERFORMANCE]

I tend to try to keep the fuel quality in your area on the top of the list along with the heat that you have to ride the bike. With that in mind that build as a 107 would work very well with,,,, , the Andrews 54 , S&S 570, our Genesis 577 .
Just a few to start with .  We have used some of the early closing intake cams and they build very nice low end tq however as I said early in the other post . You start down a path where everything needs to be more accurate and the over all yield really is nothing to write home about.  Easy going laid back build is always more fun then dealing with a picky bike.

What makes a cam great for one may not be great for the next. 

[wnogood]

I tend to try to keep the fuel quality in your area on the top of the list along with the heat that you have to ride the bike. With that in mind that build as a 107 would work very well with,,,, , the Andrews 54 , S&S 570, our Genesis 577 .
Just a few to start with .  We have used some of the early closing intake cams and they build very nice low end tq however as I said early in the other post . You start down a path where everything needs to be more accurate and the over all yield really is nothing to write home about.  Easy going laid back build is always more fun then dealing with a picky bike.

What makes a cam great for one may not be great for the next. 

I dont want a picky bike, but I do want lots of torque on the bottom side. Hp means nothing to me, and a dyno is just a sheet of paper. Easy to tune and peak torque at the lowest rpm possible. So far my andrews 48 cams do a wonderful job, but in the interest of going bigger (or maybe just better) there are alot of people that say they wont work, and only 2 reputable builders that say they will. Whats a guy to do?

[Steve Cole]

The 48's work fine, they are just not going to get the Big numbers up top. People need to remember just what you said about a dyno sheet and truely pay a little attention to how they really ride the bike. Most of the CVO owners ride to cruise on a big heavy bike. Sure there are exceptions to every rule but on a heavy touring bike one that has more torque below 4000 RPM is much nicer to ride. If I was riding a lighter Dyna then it would be different but when riding a touring model loaded two up and all the gear onboard the tractor type low RPM torque is just so much nicer to ride. Let's face it most that own a CVO are not out racing them where good high RPM HP is a game changer.

[wnogood]

The 48's work fine, they are just not going to get the Big numbers up top. People need to remember just what you said about a dyno sheet and truely pay a little attention to how they really ride the bike. Most of the CVO owners ride to cruise on a big heavy bike. Sure there are exceptions to every rule but on a heavy touring bike one that has more torque below 4000 RPM is much nicer to ride. If I was riding a lighter Dyna then it would be different but when riding a touring model loaded two up and all the gear onboard the tractor type low RPM torque is just so much nicer to ride. Let's face it most that own a CVO are not out racing them where good high RPM HP is a game changer.

I ride 2 up 99% of the time, and stay between 2500 and 4500 99% of the time. My old scooter honks pretty good without wringing its ears more than that. I had a 95" electra glide that made 107/105 and this bike feels stronger in the area I ride in.

[HILLSIDECYCLE.COM]

Ok, looking for a winter project idea, low buck.

My 103 is due for a refresh, and Im thinking about going to a 107. Can I keep my 48N cams? Im really not looking to blow up the dyno, just a refreshed motor with a little boost in torque. What specs should I be looking to follow to make the 107 work with these cams? (CC heads, head gasket etc)

Thanks for any info....

You'll have too much compression with a 107"/48 cam combo, even with a .040" head gask.
Hot summer day, loaded down............it'll spark knock like a mofo even with the best of tunes.
Scott

[Steve Cole]

Why?

If your building a 107 you have to change the pistons and cylinders and can set the compression where it should be for a good package. I would not want to build a 10.5:1 with 48's but I would have no issue at all building a 10:1 107 with 48's in it.

[wnogood]

You'll have too much compression with a 107"/48 cam combo, even with a .040" head gask.
Hot summer day, loaded down............it'll spark knock like a mofo even with the best of tunes.
Scott

Keep in mind that the SE heads have 98cc chambers. Ive seen people run 48's in stock late model 103's that have much smaller chambers without issue.

[HILLSIDECYCLE.COM]

With a 98cc chamber, you'll have all the latitude needed to keep it tamed down.
Scott