Installed Woods TW-6 Cams..but...
Installed Woods TW-6 Cams..but...
1st off, it's a 2005 FXDWGI 88 with Stage 1 A /C, Sampson BG2 pipes and Power Comm V.
I got all parts from Fuel Moto.
I installed the TW-6 cams and loaded a Map that Fuel Moto provided into my PC V.
Took it for a ride and I was in shock. The bike is a total slug. I dont get anything I consider power untill over 3000 rpm, closer to 3500 actually and I dont feel like its any more power that I had before. If Im cruising at 50mph (about 2000rpm) and roll the throttle, it goes nowhere. I have to kick down 2 gears to get it moving. Now I am praying to God it's a fuel mapping issue. I even pulled it back apart to recheck my cam timing..it is dead on. HAs anyone else experienced this? Is it too much cam? Thanks
I got all parts from Fuel Moto.
I installed the TW-6 cams and loaded a Map that Fuel Moto provided into my PC V.
Took it for a ride and I was in shock. The bike is a total slug. I dont get anything I consider power untill over 3000 rpm, closer to 3500 actually and I dont feel like its any more power that I had before. If Im cruising at 50mph (about 2000rpm) and roll the throttle, it goes nowhere. I have to kick down 2 gears to get it moving. Now I am praying to God it's a fuel mapping issue. I even pulled it back apart to recheck my cam timing..it is dead on. HAs anyone else experienced this? Is it too much cam? Thanks
Seasoned HDF Member
Joined: Mar 2010
Posts: 21,116
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From: Poolville
Bump it up
With that TW 6 cam, it really needs to have a cr of 10.0:1 to work well. your stock cr is 8.9 and with that cam intake closing of 40* it actually lowers your dynamic cr to 8.17:1 and a ccp of 163 psi, a static cr of 10.0:1 would have a dynamic cr of 9.17:1 and ccp of 189 psi. huge difference in power. and that cam does tend to come on at 3g. The chart below was an 80" evo but the w-6 and tw-6 are the same grind.
Last edited by 98hotrodfatboy; Feb 21, 2015 at 04:36 PM.
Seasoned HDF Member
Joined: Mar 2010
Posts: 21,116
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From: Poolville
I am no longer running the w-6 but when I was at 10.0:1 it was 190 ccp. with the w-8 I am running 10.8:1 static and dynamic cr is 9.61:1 w/ 201 ccp. I did have good heads also, Hillside stage II no compression releases. My next cam will put me at 9.8:1 dynamic and 206 ccp. Just waiting for warmer days to do the install.
Seasoned HDF Member
Joined: Mar 2010
Posts: 21,116
Likes: 7,640
From: Poolville
Before you do anything i would take it to a reputable tuner and have it dyno tuned, It all could be in your map. Just doing a download is a guess to how it will perform. Get a real tune and go from there. OR If you can turn wrenches fairly well put in a .030 head gasket and some S&S adjustable pushrods and shave the heads to get your combustion chamber size to 81 cc. I think the going rate to shave the heads is around $200 and $160 for parts plus tune. It'll make a big difference. Also rolling on at 2000 rpm in fifth is not recommended, I always downshift..
Before you do anything i would take it to a reputable tuner and have it dyno tuned, It all could be in your map. Just doing a download is a guess to how it will perform. Get a real tune and go from there. OR If you can turn wrenches fairly well put in a .030 head gasket and some S&S adjustable pushrods and shave the heads to get your combustion chamber size to 81 cc. I think the going rate to shave the heads is around $200 and $160 for parts plus tune. It'll make a big difference. Also rolling on at 2000 rpm in fifth is not recommended, I always downshift..
The problem I have is I was wanting a bolt in cam, I dont have the funds to get into oher mods right now. BTW, I did put in adjutable pushrods when I did the cams. The bike is what I consider not rideable like this. I'm not even sure who I could have shave the heads in my area if I could dig up some cash. I will give FM a call Monday to see if I can get any suggestions.
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Road Captain
Joined: Jun 2013
Posts: 631
Likes: 17
From: Finger Lakes NY
Who recommended the cam? It sounds to me that you were expecting more of a torque cam?
As said above, compression will wake them up but I don't know if you would still be happy with the lower rpm torque....
As said above, compression will wake them up but I don't know if you would still be happy with the lower rpm torque....
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FM recommended it. I'm not even wanting to ride it like it is....Its a little depressing. The bike ran so good b4, I should have just changed the tensioners and left the rest alone.
Last edited by dmpjr; Feb 22, 2015 at 06:56 AM.
Seasoned HDF Member
Joined: Mar 2010
Posts: 21,116
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From: Poolville
A bolt in cam not does not necessarily mean it will always produce more power with nothing else done. You need to understand how camshafts change where the power band comes in by the type of grind it has, which is all determined by Duration, Intake valve closing and Lobe separation angle. In the case of your cam the TW-6 bolt in designates that no head work is necessary (different valve guides to allow for lift or no cam chest case machining for lobe clearance). The following link is an awesome article on deciphering what cam specifications mean and do to the power band. Read the first article labeled Fundamentals, it is worth reading.
https://sites.google.com/site/harley...e-fundamentals
It will give you a full understanding of how cams work. And if you want to talk with the owner of an experienced shop I suggest you call Scott at Hillside Motorcycle and Machine in Munnsville NY. 315-495-6650 He's done many builds with that woods 6 cam. website www.hillsidecycle.com good luck my friend.
https://sites.google.com/site/harley...e-fundamentals
It will give you a full understanding of how cams work. And if you want to talk with the owner of an experienced shop I suggest you call Scott at Hillside Motorcycle and Machine in Munnsville NY. 315-495-6650 He's done many builds with that woods 6 cam. website www.hillsidecycle.com good luck my friend.
Last edited by 98hotrodfatboy; Feb 22, 2015 at 07:05 AM.