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[rheiner]

I ordered a Woods TW-555 from Hillside today, but it won't ship for a few days so I can change my mind if I need to. I'm trying to decide if I made a good decision or if I should go another route. I'm looking for good low end torque, 2,500 to 4,500 rpm range, and cruise at 80-85 mph without filling the tank every 100 miles.

I have a 2011 CVO SG. I intend on putting SE 10.5:1 pistons in the motor, the Woods 555 cam, and use stock heads. I already have the Fullsac X-pipe and 2 inch baffles. I have slight leaks at the base of both cylinders now, so my dealer is fixing it under warranty, and my great service manager suggested if I want to do any top end engine work, now's the time, since the labor is covered under warranty, hence, the pistons. I really don't want to fork out another $600-$800 for head work. My bike only has 1,500 miles on it.

The Woods 555 cam has been out only a short time, and I'm wondering if anyone actually has good results. I've read a few posts here of dissapointment with it, but maybe it's the tune, or maybe the motor needed higher compression pistons to take advantage of the cam, like Scott at Hillside told me.

Any input is appreciated.

[motor1]

I am told they suck gas at highway speeds.

[Black Diamond]

You could look this over. Several members using this cam.

http://www.cvoharley.com/smf/index.php?topic=55845.msg803546#msg803546

FWIW

JW

[HD Street Performance]

Should run fine and get you what you want as long as good premium is around, it is a bit high on compression, but some would advice differantly.

The heads are ~96cc and with a stock head gasket the pistons are down about .005 on most. Dome is 11cc. Run the calculators. Works out to 10.44/1 and a very loose squish. 200ccp. Sounds like it could be a pinger to me.

I suggest not using the HC pistons and correcting the squish by step decking using the stock head gasket and barrels as measured to get .030 squish. Milling the heads .040 will get you enough squeeze without issues.

[rheiner]

Should run fine and get you what you want as long as good premium is around, it is a bit high on compression, but some would advice differantly.

The heads are ~96cc and with a stock head gasket the pistons are down about .005 on most. Dome is 11cc. Run the calculators. Works out to 10.44/1 and a very loose squish. 200ccp. Sounds like it could be a pinger to me.

I suggest not using the HC pistons and correcting the squish by step decking using the stock head gasket and barrels as measured to get .030 squish. Milling the heads .040 will get you enough squeeze without issues.

Don, I'm already committed to the pistons. They are paid for and I'm going to give them a try. What advice would you give me to eliminate potential ping, even if that advice means going further with more mods than I said above? It always seems to work this way for me. I start off basic then things keep getting added to the list.

[hogsty]

I ain't saying nuthin this time.     

[HD Street Performance]

I would cut the pistons a bit. An even 10/1 CR and <.035 >.030 squish
The Rev Performance EMS tuner has matured and everyone seems to be happy with that product, I would not let the dealer tune it, use that plug and play tuner.

[evostroker]

What you planning is not a bad combo..comes out to 9.61 to 1 corrected..on the ragged edge of perfect for a street motor...however the squish of .045 will ping guaranteed..you have to get that down to .030 to .035. But if you just change gaskets to .035 your corrected jumps to  9.98..either spin drop the heads, or install an .030 gasket and open up the combustion chambers another 3cc's..nets you 9.61

[Fullsac Performance]

Should run fine and get you what you want as long as good premium is around, it is a bit high on compression, but some would advice differantly.

The heads are ~96cc and with a stock head gasket the pistons are down about .005 on most. Dome is 11cc. Run the calculators. Works out to 10.44/1 and a very loose squish. 200ccp. Sounds like it could be a pinger to me.

I suggest not using the HC pistons and correcting the squish by step decking using the stock head gasket and barrels as measured to get .030 squish. Milling the heads .040 will get you enough squeeze without issues.

[HILLSIDECYCLE.COM]

Pulling the piston dome volume down a tick to establish 10.2-10.3 cr could be easily done, if concerned with any detonation issues.
Scott

[rheiner]

I went to my HD dealer's engine builder this morning and showed him the responses here and asked him if we should consider going another direction, either on pistons, cam, gaskets, milling parts, or any other suggestion. My engine builder spends half of his time building racing motors for the owner of the dealership, who races competitively. He has a high end machine shop and has vast engine build experience.

He said he intended to bring the compression down to about 10.3. I didn't understand what squish is so he showed me some stock heads and 110 heads and explained the difference. He does not want to put a .030 gasket in my bike with these pistons because he said over 5,000 rpm there is a chance the valves could hit the piston, at least that's what I thought he told me. Based upon the base circle of the Woods 555 cam, he recommended SE Perfect Fit pushrods +.030, because they are stronger, lighter, and he's seen slight wobble in adjustable pushrods at times when he's put them on the lathe. He has a software package that simulates engine build performance, and he put all the Woods 555 specs into the program, the adjusted compression to 10.3:1, and some other variables, and told me when he's done with the job, I won't be getting detonation, and this will be a good build. So I'm going with him. He said they stand behind their work and will fix it for free if there are problems. Sounds good enough to me.

P.S., he didn't speak highly of the Rev Performance EMS tuner, because of several things, including the control for certain adjustments is out of your hands.

[springer09]

heres my 2 cents did the stage two of fullsacs kit,and like i said before cams did not start making power until 3000 rpm, stock cams had more low end.

[HILLSIDECYCLE.COM]

I went to my HD dealer's engine builder this morning and showed him the responses here and asked him if we should consider going another direction, either on pistons, cam, gaskets, milling parts, or any other suggestion. My engine builder spends half of his time building racing motors for the owner of the dealership, who races competitively. He has a high end machine shop and has vast engine build experience.

He said he intended to bring the compression down to about 10.3. I didn't understand what squish is so he showed me some stock heads and 110 heads and explained the difference. He does not want to put a .030 gasket in my bike with these pistons because he said over 5,000 rpm there is a chance the valves could hit the piston, at least that's what I thought he told me. Based upon the base circle of the Woods 555 cam, he recommended SE Perfect Fit pushrods +.030, because they are stronger, lighter, and he's seen slight wobble in adjustable pushrods at times when he's put them on the lathe. He has a software package that simulates engine build performance, and he put all the Woods 555 specs into the program, the adjusted compression to 10.3:1, and some other variables, and told me when he's done with the job, I won't be getting detonation, and this will be a good build. So I'm going with him. He said they stand behind their work and will fix it for free if there are problems. Sounds good enough to me.

P.S., he didn't speak highly of the Rev Performance EMS tuner, because of several things, including the control for certain adjustments is out of your hands.

He is concerened about a difference of .015", between the .045" H-D gasket, and a .030" Cometic(far superior, plus establishing much better squish) because the valves are going to whack the piston, north of 5000 rpms, on a cam that has such a low TDC??? Are those springs made of bubble gum??
We've removed .080" from that head, with a Wood 8, on many occaisons(and clayed valve/piston) and still had enough room to drive a truck under there.
Another thing I find odd, is that adjustable pushrods are used in ALL S&S engines,(they've manufactured pushrods since 1958) and we use that brand in all our engine builds here, and have for a couple of decades now.
Have never witnessed a problem whatsoever with them, to include the use of them, in our AHDRA racer, with valve seat pressures over 285 lbs., with cam lifts over .800".
I'm scratching my head over here??
Scott

[Old Salt]

Does anyone have a guess of the gas milage drop with the TW-555?  Five dollar a gallon prices might be here this summer.

[hdbrad03]

Does anyone have a guess of the gas milage drop with the TW-555?  Five dollar a gallon prices might be here this summer.

I would give up some MPG's to put smiles on my face. I will let you know in 2 weeks when I finally get to ride with the TW-555's if it sucks gas. I changed for performance gains!

 

     Brad