Wood TW6-6 TW-555 Cam Dyno Test by Fuel Moto

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MaMaBean

New member
I agree, the woods cams respond excellently and optimally to increased compression.... but as Jamie's tests prove you do not need extra compression for these cams to work and work very well IMO.




I have to disagree that Stock headpipes and slip on mufflers are "very close" to a 2-1 or even 2-1-2 pipe set-up. I have seen many dyno charts of guys who put cams in their bike with the stock headers and were disappointed with the results - then swapped out the exhaust for a decent 2-1 pipe and the numbers changed dramatically.
 
.030 head gasket, mill the heads .020, CC the combustion chambers.. Gets you to about 9.8 static, ensures your head volume is the same in both holes.

Beyond that, go to higher compression pistons.
 
Not sure its real value for money though when you consider the minimal gains you get with doing all that just for a bump in compression???

From what I understand, increasing cubic inches at the same time as increasing compression - then some real gains will be seen.
 
Boogaloodude, with all this talk of caMS..... how do you like the old SE 204's? Very underated cam IMO. Before this thread came along, that would have been my pick of all the "bolt-in" cams.
 
That's why I like the big bore kits. You get the benefits of increased displacement, and going from 96 to 103 will also bump compression a half-point. Every little bit helps.



They're actually getting a little more respect lately. There's been some good running 96s and 103s with them, and some guys are giving them another look.

I'm running them in a 103, at a static compression of 9.7:1. The cams net a CCP of around 190, which is about the max I like to run in a street motor. I wanted just a little more lift, so added the 1.725 rockers, for an effective lift of .539. The higher ratio rockers also speed up the ramps and add a couple of degrees duration. The cams have 8* advance ground in, which along with the relatively early intake close results in a cam that hits pretty early. The 235 duration will give them a better run into higher rpms than some of the other torque cams.

The real beauty of the 204s is that you can just bolt them in and tune it. If I'd pulled my heads to bump compression, I would have gone with another cam.

In real world use, they work great, giving real gains across the entire rpm range. They're somewhat similar in performance to the Woods 6. I'd run the woods 6 at 10.2:1 for optimal performance. The 204s are perfectly happy at 9.7:1, so that's why I chose them.
 
Could not have said it better myself..I agree totally on this and don't forget that sweet "loop" at idle with Woods cams as another bonus, especially with DD:s


Now I'm really waiting for the numbers on the Stage II 107" kit
 
Amen. I don't have anything to contribute but am VERY interested in this thread.

Exhaust and tuner stuff is a bit easier for me to sort out so I truly appreciate reading a "team" type of discussion on pros/cons of the critical wish-list items for my new scoot... maybe even an early rebuild.

After all, bigger is better

...oh, and I'm not drag racing any more, just rolling down the road now. Therefore I don't want her to slack off at high RPM but roll-on from around 2500 or so RPM is important.
 
OK i must admit i am eager to upgrade...I would like cams and may buy the stuff piece by piece until i can get them installed by a local trusted Indy...My question is Would $100 be a good deal for a set of TW6-6's? Also will i really have to or should i ask will i have any real advantage to putting a gear drive in? I don't really get the gear drive VS the chain deal? I see gears on the TW 6-6 , do i have to buy TW6G on top of the cams to convert? Jamie has done a freakin bang up job with the maps and has me salivating to do a upgrade...Any advice here would be appreciated...My bike has 50k miles and want to start pullin a trailer, need some umph!.
 
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