Help me choose a cam.
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Road Master
Joined: Jul 2006
Posts: 978
Likes: 0
From: Southeastern USA
Help me choose a cam.
This all happened kind of fast. Wasn't really planning on it, but I've been keeping my eyes open to do this on the cheap and things just kind of came together. I mean I'm doing this cheaper than dammit.
Anyway, I scored a brand new set of the screamin eagle forged high compression pistons off of ebay, cheaper than dammit. My local machinist will bore my jugs to match them for 35 bucks each. He's done a lot of work for me over the last 15 years, and I trust him completely. I am going to use my stock heads for the 9.6:1 compression ratio to maintain easy starting and driveability, although I will polish the ports while I have them off.
All I have left to buy is a gasket kit, and a set of cams.
So, my question is, which cam?? Somebody tell me what I want for the best driveability, and smooth power build. I don't want to build a high rev horespower monster, I want to build torque fast and scream off the line.
I'm not neccesarily trying to stick with harley parts either. I'll consider any quality brand performance cam.
Help me out here. Any suggestions??
Anyway, I scored a brand new set of the screamin eagle forged high compression pistons off of ebay, cheaper than dammit. My local machinist will bore my jugs to match them for 35 bucks each. He's done a lot of work for me over the last 15 years, and I trust him completely. I am going to use my stock heads for the 9.6:1 compression ratio to maintain easy starting and driveability, although I will polish the ports while I have them off.
All I have left to buy is a gasket kit, and a set of cams.
So, my question is, which cam?? Somebody tell me what I want for the best driveability, and smooth power build. I don't want to build a high rev horespower monster, I want to build torque fast and scream off the line.
I'm not neccesarily trying to stick with harley parts either. I'll consider any quality brand performance cam.
Help me out here. Any suggestions??
Outstanding HDF Member
Joined: Nov 2006
Posts: 2,203
Likes: 2
From: Pittsburgh, PA
RE: Help me choose a cam.
I have Andrews TW-37G's with the S&S Cam Gear Drive.
88 C.I.
Stock heads and intake
Dynojetted CV
SE Stage1 Air Cleaner Kit
SuperTrapp SuperMegs 2:1 exhaust
The 37G's are designed for a 95 C.I. build and a slight compression increase. I am amazed at the currentmotor's performance with the 37's and basically bone stock otherwise. Look at the torque curve on the chart, I cannot complain about the cams at all and look forward to the 98 inch upgrade I will do soon.
My Dyno chart, raw run, no tuning:
[IMG]local://upfiles/20717/CE640F755B2647B982EEB5DFED49A810.jpg[/IMG]
88 C.I.
Stock heads and intake
Dynojetted CV
SE Stage1 Air Cleaner Kit
SuperTrapp SuperMegs 2:1 exhaust
The 37G's are designed for a 95 C.I. build and a slight compression increase. I am amazed at the currentmotor's performance with the 37's and basically bone stock otherwise. Look at the torque curve on the chart, I cannot complain about the cams at all and look forward to the 98 inch upgrade I will do soon.
My Dyno chart, raw run, no tuning:
[IMG]local://upfiles/20717/CE640F755B2647B982EEB5DFED49A810.jpg[/IMG]
Cruiser
Joined: Oct 2005
Posts: 175
Likes: 0
From: Lilburn, Ga.
RE: Help me choose a cam.
Get American Rider magazine from two months ago--they have an article on a new cam by Andrews made for the 06-07 Dynas--TW37H--does not require gear drive and you can use the same stock pushrods. Cams are set up to dramatically increase torque from 2200-4000rpm. This months issue with the Dyna on the cover has an article on increasing torque on 88's.
Road Warrior
Joined: Dec 2006
Posts: 1,530
Likes: 0
From: Diamond Bar, California
RE: Help me choose a cam.
If you not planning to mill you heads down a bit then use a .030 head gasket, You will be far short of 9.6 to 1 compression with you stock heads!
My heads are at 78ccs and with a .042 gastket im at 9.8.
My heads are at 78ccs and with a .042 gastket im at 9.8.
Thread Starter
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Road Master
Joined: Jul 2006
Posts: 978
Likes: 0
From: Southeastern USA
RE: Help me choose a cam.
Well, I'm currently looking at the 204's and the 211's. Seems to me the shorter duration of the 204's would build more low end torque.
I've also nearly got myself talked into having the heads ported and polished as well.
Somehow I just cannot see any advantage in the 211's with that much duration for building low end torque. Seems like it would kill the low end.
Any thoughts or personal experience??
I've also nearly got myself talked into having the heads ported and polished as well.
Somehow I just cannot see any advantage in the 211's with that much duration for building low end torque. Seems like it would kill the low end.
Any thoughts or personal experience??
Outstanding HDF Member
Joined: Nov 2006
Posts: 2,203
Likes: 2
From: Pittsburgh, PA
RE: Help me choose a cam.
Check out the spec's for the Andrew's 37G's or 37H's, and the 211's.Then look at my dyno chart again. 80 to 88.9ft/lb's of torque form 3,000 to 5,000 RPM.
Just hit "Search" when the link comes up.
http://www.nightrider.com/cgi-bin/ff...?ff_config.txt
Just hit "Search" when the link comes up.
http://www.nightrider.com/cgi-bin/ff...?ff_config.txt
Club Member
Joined: May 2006
Posts: 14,564
Likes: 9,225
From: the 50s & the 60s
RE: Help me choose a cam.
ORIGINAL: ButtMan1000
.................................................. .................................................. ......................
My Dyno chart, raw run, no tuning:
[IMG]local://upfiles/20717/CE640F755B2647B982EEB5DFED49A810.jpg[/IMG]
.................................................. .................................................. ......................
My Dyno chart, raw run, no tuning:
[IMG]local://upfiles/20717/CE640F755B2647B982EEB5DFED49A810.jpg[/IMG]
Never heard of that one before. Always SAE.
mud
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Thread Starter
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Road Master
Joined: Jul 2006
Posts: 978
Likes: 0
From: Southeastern USA
RE: Help me choose a cam.
ORIGINAL: ButtMan1000
Check out the spec's for the Andrew's 37G's or 37H's, and the 211's.Then look at my dyno chart again. 80 to 88.9ft/lb's of torque form 3,000 to 5,000 RPM.
Just hit "Search" when the link comes up.
http://www.nightrider.com/cgi-bin/ff...?ff_config.txt
Check out the spec's for the Andrew's 37G's or 37H's, and the 211's.Then look at my dyno chart again. 80 to 88.9ft/lb's of torque form 3,000 to 5,000 RPM.
Just hit "Search" when the link comes up.
http://www.nightrider.com/cgi-bin/ff...?ff_config.txt
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Road Warrior
Joined: Dec 2006
Posts: 1,530
Likes: 0
From: Diamond Bar, California
RE: Help me choose a cam.
the 37s are almost like stock, well until you crack the thottle.fairly smoothe.
the 211s are more suited to 95 in bikes with 10.1 compression or more, it would idle like crap on a 88 with stock compression.
You could to a S&S .510 cam too if you wanted a choppy idle
and still have a mostly stock motor!
[IMG]local://upfiles/22371/BF108DA8045F4206A5FAEA18F3620370.jpg[/IMG]
the 211s are more suited to 95 in bikes with 10.1 compression or more, it would idle like crap on a 88 with stock compression.
You could to a S&S .510 cam too if you wanted a choppy idle
and still have a mostly stock motor![IMG]local://upfiles/22371/BF108DA8045F4206A5FAEA18F3620370.jpg[/IMG]