Hot Rod Cams
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Grand HDF Member
Joined: Sep 2017
Posts: 4,359
Likes: 1,219
From: Dubuque, IA
There is a very slight dip in the torque around 5300, 5400 then it wants to come back but just can't recover making me think it's the exhaust not playing real well with the overlap there or it would be close to breaking 100hp. It does come back right at the end at 6000rpm.
Not that it's bad. Just not a curve I expected from the 777s.
Last edited by 60Gunner; Feb 24, 2020 at 12:10 PM.
Road Warrior
Joined: Aug 2007
Posts: 1,392
Likes: 43
From: South Australia
If you are now thinking about a 124 I'd definitely wait. You are going to be spending money and still not be happy with it anyway. You will be happy with a 124 though lol. Also in my experience I've never seen a bolt in cam only upgrade make 100 HP. Headwork is needed for that. Usually top out at around 98.
Last edited by Tat2u; Feb 24, 2020 at 01:03 PM.
Thread Starter
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Grand HDF Member
Joined: Sep 2017
Posts: 4,359
Likes: 1,219
From: Dubuque, IA
If you are now thinking about a 124 I'd definitely wait. You are going to be spending money and still not be happy with it anyway. You will be happy with a 124 though lol. Also in my experience I've never seen a bolt in cam only upgrade make 100 HP. Headwork is needed for that. Usually top out at around 98.
I dont NEED a 124 either but I get as much from building one as I do riding one. I'm a f'n gearhead and gotta know my bike inside and out.
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,925
Likes: 8,027
From: poway
I ran the SnS570 and 777 in a 103 set to 9.9 to 1 with heads and the 570 sucked worse. 777 wasn't too bad. Fatcat pipe with quiet baffle. I will say say that the 777 is more fun at 10.4 in a 107.. 
Add. The 570 was pretty much dead below 2500 rpm.
Add. The 570 was pretty much dead below 2500 rpm.
Last edited by Max Headflow; Feb 25, 2020 at 10:09 AM.
Thread Starter
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Grand HDF Member
Joined: Sep 2017
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From: Dubuque, IA
I'm really not concerned with anything below 2500rpm. Neither are going to be all that great there. But depending on what you did to the heads, maybe velocity was hurt in favor of volume?
Just spitballin'.
I'd probably be more inclined to go 999-6A rather than the 777 tho.
Last edited by 60Gunner; Feb 25, 2020 at 01:20 PM.
Seasoned HDF Member
Joined: Dec 2005
Posts: 19,925
Likes: 8,027
From: poway
What made the 570s suck worse? It's made for CRs of 9.2 to 10.2.
I'm really not concerned with anything below 2500rpm. Neither are going to be all that great there. But depending on what you did to the heads, maybe velocity was hurt in favor of volume?
Just spitballin'.
I'd probably be more inclined to go 999-6A rather than the 777 tho.
I'm really not concerned with anything below 2500rpm. Neither are going to be all that great there. But depending on what you did to the heads, maybe velocity was hurt in favor of volume?
Just spitballin'.
I'd probably be more inclined to go 999-6A rather than the 777 tho.
I would not go 999-6a without a compression boost and springs.
Thread Starter
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Grand HDF Member
Joined: Sep 2017
Posts: 4,359
Likes: 1,219
From: Dubuque, IA
Another cam I had been looking at is the 7h. Might have to revisit.
But I've seen bone stock 95s doing 95+ hp and 105+ ft. Lbs with the 570s coming on from 2800rpm. Its not the exhaust duration so much as the short intake that concerns me. The 252/252 of the 999s would be much better.
If you were looking for a cam to pull from 2000rpm up, you definately picked the wrong cams. Both of them.
But I've seen bone stock 95s doing 95+ hp and 105+ ft. Lbs with the 570s coming on from 2800rpm. Its not the exhaust duration so much as the short intake that concerns me. The 252/252 of the 999s would be much better.
If you were looking for a cam to pull from 2000rpm up, you definately picked the wrong cams. Both of them.
Last edited by 60Gunner; Feb 26, 2020 at 08:16 AM.
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Thread Starter
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Grand HDF Member
Joined: Sep 2017
Posts: 4,359
Likes: 1,219
From: Dubuque, IA
No quest for a magic cam. 
Different cams can go about accomplishing the same or similar end result in quite different ways. Some better than others.
No matter what cam I (or others in the past from what I've read) ask/asked about here that has more power on the right side of the curve in a stock compression motor, results in the same kind of responses (once for 17 pages) but I've seen and heard enough (in PMs and emails mostly) the past 2 weeks from a few that have gone the same direction regardless to know I won't be disappointed with my decision and it'll make my otherwise stock 103 the fun ride I'm looking for for the next year or two while I plan the big build. I may end up keeping them depending on how that plan unfolds. I'll post the dyno results when I'm done but I'm off to the beginning stages of that build, deciding which way to go and who to work with going forward so I can start planning ahead.
I know what I want out of it . Just a question of which way to go about getting there. Like bigger motor, lesser build or build the **** out of a 107 but it's going to be done and built in my head and on paper before it's time to do it. Starting with the crank.
Thanks to those that had useful comments and info here and privately.
Different cams can go about accomplishing the same or similar end result in quite different ways. Some better than others.No matter what cam I (or others in the past from what I've read) ask/asked about here that has more power on the right side of the curve in a stock compression motor, results in the same kind of responses (once for 17 pages) but I've seen and heard enough (in PMs and emails mostly) the past 2 weeks from a few that have gone the same direction regardless to know I won't be disappointed with my decision and it'll make my otherwise stock 103 the fun ride I'm looking for for the next year or two while I plan the big build. I may end up keeping them depending on how that plan unfolds. I'll post the dyno results when I'm done but I'm off to the beginning stages of that build, deciding which way to go and who to work with going forward so I can start planning ahead.
I know what I want out of it . Just a question of which way to go about getting there. Like bigger motor, lesser build or build the **** out of a 107 but it's going to be done and built in my head and on paper before it's time to do it. Starting with the crank.
Thanks to those that had useful comments and info here and privately.
Last edited by 60Gunner; Feb 27, 2020 at 04:54 AM.