Cam Dilemma for 103

[gsxrboy96]

In my opinion for the money. If you're going into the cam
Chest. I just did a 103, used a .030 head gasket with a Andrews 54 , 2200-6000 and made really great power. The 255s sign off way to early for my taste. The 54 is also cheap a d you could grow into it in the future 🤷‍♂️... anyway good luck in the never ending quest for more power lol ..

[86fxwg]

Quit being cheap.  Get you heads to Capital for pocket porting and CC.  Shoot for 10.4, .5, and use the 150.  Save your money on a good tune and be done.  Do it now or do it later.  Too many fast bikes around Springfield you got your hands in to look at just a bolt in.  You can deal with guys having faster but they are gonna leave you like your standing still.  Then you are going to do what you should be doing now and I wont have to give up an extra Saturday if you do it all at once.

Is this a 96" or a 103"? If it's a 103 I'd leave it and do the above. If it's a 96" I like +.040" 103 pistons (leaves room for 1 more bore and hone to 107" provided the cylinders stay healthy) and do the above.

Little tough love from hrdtail... you guys must have done this before 👍

Many Many time's!
Thats why im only doing a cam & doing it once!  I'm NOT chasing #'S.
Thinking im going 555TQR'S Done so many with happy customers I know what to expect.
Wish i new the close on The TTS150
Thanks gentleman

[RTMike]

The TTS works well with more comp and head work this build had 10.4 comp check out the rest of the build on the sheet.I use the 555 lots for stair bolt ins with an exhaust change they are great,you won't be disappointed.

[TN]

[/quote]

Many Many time's!
Thats why im only doing a cam & doing it once!  I'm NOT chasing #'S.
Thinking im going 555TQR'S Done so many with happy customers I know what to expect.
Wish i new the close on The TTS150
Thanks gentleman
[/quote]


IVC 33*

[Don D]

Thanks TN

The often overlooked S&S MR103 can do as good or better than the others in it's class as a bolt-in, all things considered.

[Hillside Motorcycle]

We carry approx, $35,000.00 in cam inventory from Shovel, to M8. Fact.
The cam we reach for, and our client-base loves, is an Andrews 48 in a plug/play 103" touring bike.
If the heads are coming off, THEN you can let the badger loose, and see great power from that 103".

[Hossamania]

I see a Woods TW7H-6 for sale in the section, will that work in a stock '12 103, how will it preform compared to the CR 570-2, or the 48 that Hillside likes?
50,000 miles on the motor, potential for issues with the valves and guides being forced past their normal wear marks?

[rigidthumper]

Leaving everything else even, the 7H would be slightly worse below 3.2K than the 48, and slightly better above 3.5K. ( about 6-7 horse improvement by redline).
They all benefit from a hi-flow AC and free breathing exhaust, and tune.

[Hossamania]

Leaving everything else even, the 7H would be slightly worse below 3.2K than the 48, and slightly better above 3.5K. ( about 6-7 horse improvement by redline).
They all benefit from a hi-flow AC and free breathing exhaust, and tune.

Thanks Rigid, probably not what I'm looking for on this bike.

[rigidthumper]

What are you looking for?

[Hossamania]

Something that hits a little earlier but still carries out to 5g or more, the 570-2 seems to fit the bill, and I'm not opposed to the 48, though I understand it shuts down a little early.

[838]

Something that hits a little earlier but still carries out to 5g or more, the 570-2 seems to fit the bill, and I'm not opposed to the 48, though I understand it shuts down a little early.

Comp Cams make 4101 bolt in for 103" with some added exhaust duration. 3101 is bolt in with less exhaust duration.

3101:

Gross Valve Lift: .569 In/.569 Ex
Lobe Lift: .350 In/.350 Ex
Duration @ .053": 226 In/234 Ex
Valve Timing Open/Close: 13.5 In/32.5 Ex Open & 43.5In/10.5 Ex Close
Lobe Center Line: 99.5 In/106.5 Ex
Lobe Separation: 103
Tappet Lift @ TDC: .092 In/ .085 Ex
Valve Lift @ TDC: .150 In/.138 Ex

4101:

Gross Valve Lift: .569 In/.569 Ex
Lobe Lift: .350 In/.350 Ex
Duration @ .053": 235 In/257 Ex
Valve Timing Open/Close: 20.5 In/34.5 Ex Open & 56.5In/20.5 Ex Close
Lobe Center Line: 97 In/108 Ex
Lobe Separation: 102.5
Tappet Lift @ TDC: .123 In/ .116 Ex
Valve Lift @ TDC: .200 In/.189 Ex

[Hossamania]

Something that hits a little earlier but still carries out to 5g or more, the 570-2 seems to fit the bill, and I'm not opposed to the 48, though I understand it shuts down a little early.

Comp Cams make 4101 bolt in for 103" with some added exhaust duration. 3101 is bolt in with less exhaust duration.

3101:

Gross Valve Lift: .569 In/.569 Ex
Lobe Lift: .350 In/.350 Ex
Duration @ .053": 226 In/234 Ex
Valve Timing Open/Close: 13.5 In/32.5 Ex Open & 43.5In/10.5 Ex Close
Lobe Center Line: 99.5 In/106.5 Ex
Lobe Separation: 103
Tappet Lift @ TDC: .092 In/ .085 Ex
Valve Lift @ TDC: .150 In/.138 Ex

4101:

Gross Valve Lift: .569 In/.569 Ex
Lobe Lift: .350 In/.350 Ex
Duration @ .053": 235 In/257 Ex
Valve Timing Open/Close: 20.5 In/34.5 Ex Open & 56.5In/20.5 Ex Close
Lobe Center Line: 97 In/108 Ex
Lobe Separation: 102.5
Tappet Lift @ TDC: .123 In/ .116 Ex
Valve Lift @ TDC: .200 In/.189 Ex

Specs don't help me, I can't relate them to performance, how does each perform, where is the power band compared to stock cam with stock heads, hi flow AC and exhaust?
A follow up question for Rigidthumper on the 7H, I like the idea of it carrying out, you say it's a bit soft below 3200 rpm, is it softer than stock cam, or about equal?

[rigidthumper]

Slightly softer than stock, by a only a couple percent- catches even by 2400, beats it from there up. Have you had the current configuration tested, to see where you are?

[Hossamania]

Slightly softer than stock, by a only a couple percent- catches even by 2400, beats it from there up. Have you had the current configuration tested, to see where you are?

No, it's just stock cams, ac, decatted header with 3" Rhineharts, flash tune from Fuel Moto on a Power Vision. (S&S standard lifters with 30,000 miles on them now.) It runs good, "good enough". I don't want to go crazy on this motor like my other one, just a good set of cams and a proper tune. I don't race this one hard, but I do like to get on it, no fun after about 4500 rpms, hoping to at least get another 1000 rpm of power out of it, and gain a little low end. It's pretty good from 2500  to 4000, no real complaints there.
2012 Ultra Limited, 50,000 miles, time for tensioners. "As long as I'm in there, I might as well do cams."
The  CR 570-2 seems to be the one I'm looking for, but the 7H came up with a good price, just wondering how they worked. Thank you for the info on them.
Were I doing heads, the 7H would probably work fine, and the Andrews 54 would get a look as well.

[838]

I ran the A48 and the 570-2 in two separate 96" motors. The 48 was more snappy but fell off slightly sooner. The 570-2 was slightly less snappy and pulled a bit longer.

[FXDBI]

S&S 570....ES if you have no comp releases.   Bob

[Barrett]

The best seat of the pants mod I did was a 30T pully.

[kd]

The best seat of the pants mod I did was a 30T pully.

Great point.    It's also a great way to compensate for a cam that's a little longer by spicing up the lower end performance.