Engine build cam question
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Novice
Joined: Mar 2010
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From: usa
Engine build cam question
Still figuring out my build with SE MCR heads, 1550 flat tops on 02 Road Glide. Have everything ready to go except the cams. I really like the looks of the Woods TW7 cam but cant get it for my older model TC. So now I have narrowed my choices down to the Head Quarters TC-575-HC or the Andrews TW54 I'm leaning towards the Andrews to save $$. Both look good by the numbers but was concerned by the 31 overlap on the TW54 as compared to the TC-575-HC which has 44 overlap. What effect if any will the lower 31 overlap have on the bike either good or bad. Has anyone heard anything negative about the TW54 cam, any reason why you wouldn't use it. My MCR heads allow up to .575 the TW54 goes to .555 so should be a good fit. The Head quarters go to .575 on intake so it would be at the limit. Looking at the Big Boyz calc I will be right at 10.04/1 static and 9.23/1 corrected at 191 CCP if I use .30 HG, zero decking and 78 cc chambers. Numbers looked good but I'm a power junkie so which cam will give me most bang for the buck?
Any guesses on HP and torque numbers? I will be running a S&S Super G with enlarged intake and Thunderslide plus D&D Fatcats, Crane ignition.
Any guesses on HP and torque numbers? I will be running a S&S Super G with enlarged intake and Thunderslide plus D&D Fatcats, Crane ignition.
Road Warrior
Joined: Dec 2006
Posts: 1,530
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From: Diamond Bar, California
well, the HQ cam will build more cylinder pressure, which equals more torque, so if big torque and midrange is the goal then the HQ cam is the ticket.
Having no exp. with that Andrews cam i cant say how strong it will be down low, should be fine im guessing.
the only thing i dont like about your combo is the size of the S$S carb, and E would be more than enough, a Woods tricked out CV would be the hot ticket.
#s should be like 100-105 HP and 108-110 torque...IMO
Having no exp. with that Andrews cam i cant say how strong it will be down low, should be fine im guessing.
the only thing i dont like about your combo is the size of the S$S carb, and E would be more than enough, a Woods tricked out CV would be the hot ticket.
#s should be like 100-105 HP and 108-110 torque...IMO
Thread Starter
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Novice
Joined: Mar 2010
Posts: 16
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From: usa
well, the HQ cam will build more cylinder pressure, which equals more torque, so if big torque and midrange is the goal then the HQ cam is the ticket.
Having no exp. with that Andrews cam i cant say how strong it will be down low, should be fine im guessing.
the only thing i dont like about your combo is the size of the S$S carb, and E would be more than enough, a Woods tricked out CV would be the hot ticket.
#s should be like 100-105 HP and 108-110 torque...IMO
Having no exp. with that Andrews cam i cant say how strong it will be down low, should be fine im guessing.
the only thing i dont like about your combo is the size of the S$S carb, and E would be more than enough, a Woods tricked out CV would be the hot ticket.
#s should be like 100-105 HP and 108-110 torque...IMO
Ultimate HDF Member
Joined: Feb 2007
Posts: 7,663
Likes: 7
From: Northeast Ohio
Either of the cams you suggest would work. The HQ 575 will give you more torque down low and really shines midrange and again adds some to the top end.
I have lots of experience with the HQ cams and you can't go wrong with that selection. I have not installed the Andrews in any builds so really can't comment on what the results would be..
The Super G is too much carb for your combination, no matter which cam you use. It will negatively impact low rpm power and rideability.
I have lots of experience with the HQ cams and you can't go wrong with that selection. I have not installed the Andrews in any builds so really can't comment on what the results would be..
The Super G is too much carb for your combination, no matter which cam you use. It will negatively impact low rpm power and rideability.
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