Just Some Info for Your Discernment

[RRRUFF]

Thought I would post these pics for a before and after on my TP to S&S rocker boxes that I did last year. The first pics will be the TPs and the second will be the S&S valve train alignment.

TPs, notice the wear pattern on top of the valve stem, uneven and not centered.

Now notice the wear pattern on top of the valve stem. Much better alignment, even and centered much better.:2thumbs:

I did not notice any significant reduction in noise though and that was my primary objective with last years work. I did have larger intake and exhaust valves and a 600 cam put in, since mine is and 05 and had the EPA motor. This year my tear down was for "piston slap". Cylinders have been bored .010 over and fitted with new rings and pistons. I havent gotten her back together yet due to some other things I want to do first.

 

[spadesluck]

Besides the flaking chrome and some wear patterns what is another reason to going to the S&S boxes? I have an 05 as well that the chrome is flaking off one of the boxes but other than that everything seems to be in order.

 

[Five Five]

Hey RRRuff.... how many miles on your scoot ?

 

[05 old dog]

im curious about the whys of the swap also...i thought big dog went to the tp boxes to reduce valve train noise for epa reasons... any other pluses with the s&s boxes?

 

[RRRUFF]

I started out to try to reduce the valve train noise but the biggest plus was increasing valve size and the heads ported and cut for compression increase. With the 600 cam I had a very noticable increase in power. I did have one valve that was about ready to give up so the timing was right for this change. I had about 13k on the bike before this work was done. Now to be fair there are some memebers here that has alot more miles with no problems. But its all about the geometry and getting everything in alignment for reliability.

 

[Madrad123]

The reason the TP engines are not aligned is because the heat will make items inside the engine grow. With the growth such things grow and with they grow they tend to break and destroy engines. With the rocker being a little misaligned will allow for the valve and the rocker to last longer with a sustained ride.

 

[BadBrad]

There must be a thousand posts regarding the issues that have occurred due to having TP Rocker boxes on a S&S motor. The main issue is quite visible in the pics shown on this thread. The geometry/alignment of the TP roller rockers pushing down on the valves is not centered. This may not cause many issues at first, but with normal wear and tear, you end up wearing out your valve guides pre-maturely. This can eventually lead to catastrophic failure with pieces of the valve guide falling into the cylinder or worse yet, a valve breaking due to the un-natural wear and falling into your cylinder. I'm talking from first hand experience here. When my valve broke mid-stem and dropped, it destroyed the head, piston and cylinder. I was not in a position to purchase all new S&S, so I went back with used parts. About 6 months later, I have a valve guide wear out so bad, it looked like an oval and was letting oil from the head suck into the cylinder for short periods of time. It looked like a mosquito truck fogging when this happened. I recently purchased S&S rocker boxes off Ebay and now I'm just waiting to find an inexpensive set of S&S roller rockers to complete the set and put them on. I'll be changing out all 4 valves and guides when I do this.



Here is what my valve guides looked like after they wore and began letting oil flow into the cylinder. Not everyone has had this problem, but if you can find a good deal on a S&S rocker box and roller rockers, do yourself a favor and eliminate this potential problem. TP with S&S is a match made in hell for me.

 

[TCALZ06]

I started out to try to reduce the valve train noise but the biggest plus was increasing valve size and the heads ported and cut for compression increase. With the 600 cam I had a very noticable increase in power. I did have one valve that was about ready to give up so the timing was right for this change. I had about 13k on the bike before this work was done. Now to be fair there are some memebers here that has alot more miles with no problems. But its all about the geometry and getting everything in alignment for reliability.

Do you happen to have any pics of your cylinder walls? I just had mine rebuilt at 18k and had piston slap too