Time to pick a new cam........
Road Master
Joined: Mar 2013
Posts: 817
Likes: 380
From: Central Ohio
Whatever you think pal. There's no free lunch, end of story. Like I said, people stress over 3lbft. It's nothing more than bench racing and a conversation piece
Grand HDF Member
Joined: Sep 2017
Posts: 4,359
Likes: 1,219
From: Dubuque, IA
Like I said, if you think it's just about a cam's intake valve close, you are sadly mistaken. I've seen cams with totally different intake valve events put up a nearly identical torque curve and numbers on the same dyno and bike and vice versa.
Care to explain that? Your 3ft.lbs. is pure speculation.
The pipe is just part of the exhaust system that matters. Yet people pay absolutely no attention to the exhaust valve events. Or ramp speed, LSA, and TDC lift among other things for that matter. You look at one number and think they are all the same.
TTS cams are a good example of how it's done to have a strong bottom end cam at 2000rpm that carries out further than most any other cam with similarly strong low end torque. Often WAY further.
Peak torque numbers might be close at times but it's pretty much meaningless when it drops off like a rock right after killing any horsepower.
And people wonder why Steve keeps his cam specs secret.
There was a comparison done with the 22X and the TTS 175. Same bike (M8 114) same dyno and tuner, same day. Both started out and had identical torque at 2000-2200rpm to 3000rpm. The 175 steadily increased the gap from there to beat the 22X by 11hp. That's not inconsequential my friend and it's not by accident.
Often it's done with less lift being easier on the valve train as well.
Last edited by 60Gunner; Jan 15, 2024 at 12:20 PM.
Road Master
Joined: Mar 2013
Posts: 817
Likes: 380
From: Central Ohio
Not once did I say anything regarding intake close. You've mistook me for someone else. Obviously everything in the system reacts together, but that didn't stop you from making a recommendation did it? Especially without all the details...
Seasoned HDF Member
Joined: Mar 2021
Posts: 18,430
Likes: 3,713
From: backwoods
I need to learn more about cams. But I also wonder how much real differene is there between this brands and that brands when build for X compression and size. I ended up going with S&S MR103 for my conservative 103" build, two builders mentioned it, and one of those builders also mentioned TW222. But then went with MR103 easy start because they knew that was a concern of mine, and said they were in their own bike. But then another builer said they would not put them in again. Which is the funny think about picking ths stuff out. One guy loves this and another hates and loves that.
Grand HDF Member
Joined: Sep 2017
Posts: 4,359
Likes: 1,219
From: Dubuque, IA
This is true. But so is exhaust valve size and exhaust duration of the cam. Just as much as the pipe(s) really. They can influence what pipe works best and what doesn't in a particular build.
Seasoned HDF Member
Joined: Mar 2010
Posts: 21,114
Likes: 7,638
From: Poolville
The 48s are good for stock compression. You are doing the top end? You can set compression to whatever. Why limit yourself to cams like the 48s?
The TTS 100 is a good choice but so is the TTS 150 @ 10.5:1 or the Tman 580PS @ 10.5:1. I'd bet you'd have more low end torque with either with some head work than you do now and they'd carry out further.
The 555s you had didn't because your compression was too low for them. Run them @ 10.5:1 instead of 9.7:1 once.
Just sayin'...
The TTS 100 is a good choice but so is the TTS 150 @ 10.5:1 or the Tman 580PS @ 10.5:1. I'd bet you'd have more low end torque with either with some head work than you do now and they'd carry out further.
The 555s you had didn't because your compression was too low for them. Run them @ 10.5:1 instead of 9.7:1 once.
Just sayin'...
Not a fan of TTS but there are plenty out there to choose from...
Last edited by 98hotrodfatboy; Jan 23, 2024 at 06:26 AM.
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Grand HDF Member
Joined: Jun 2017
Posts: 4,680
Likes: 3,971
From: Near Yosemite
Just out of curiosity, is there anything in particular about the TTS's that you're not fond of? I know that I haven't heard a lot about them over the years, but I am kinda interested in them.