In the process of maximising performance on 2015 RT-S
I started the process of dialing in my 1330 Ace motor. I'm trying to get Maximum passing performance for a two lane highway situation where you really need all you can get to safely and quickly pass. I have dialed in dozens of racing bikes in my 40 year cycle racing career. In talking with Blue Knight, ( the guy who won the drags @ spyder fest this year with a 1330 motor) I concurred the stock air box is the first starting point. I have a local 1/4 mile where I do my testing, I do not watch times but focus on speeds at the finish line.
1. All stock I get 90 mph ish at my test location.
2. All Stock, Modifying the air box with 15 specific 1/2 holes for extra intake air. The bike now lays down about 5 feet of rubber and finished 92 to 93 mph. This seems mostly from the faster hit and rubber burning off the line.
3. Adding the cat delete, air box mod, with the stock muffler lays down about 15 feet of rubber off the line. Almost too much traction loss as my best mph is a wash @ 93 mph.
Blocking my air box mod holes, cat delete, stock muffler. Almost no tire spin and basically back to stock times of 90 mph ish.
Step one conclusion, air box modification improves instant aceleration but only modest if any gains through mid range and top end.
PHASE TWO RESULTS.
4. Two Brothers pipe and cat delete. Total noise and nothing to show for it. No tire spin off the line. I called tech support @ two brothers. Their pipe is designed to run with the cat in place. They suggest I run it with the PX-1K power tip.
5. Two brothers pipe, air box mod with cat in place. Whole new animal. Power slightly up staring at 3k. Huge power gain from 4 to 6 K. Loss of power off the line and almost no tire spin. 96 to 97 mph. This is real step in the right direction. Quite down low and not too loud on top. When I block my air box mod holes I loose 2 mph. Shift the bike down to 4th or 3rd gear in the 40 to 50 mph range and I was stunned with the sound and passing performance improvements. Heads really turn at the new sound. Adding the PX-1K power tip is a wash for speeds but improves low end to the point of about 5 feeet of rubber off the line.
6. Two Brothers pipe, PX-1K power tip, CAT Delete, air box modification. This is the future for this bike when the market allows for addressing ECU timing restrictions and fuel management. It can still be fairly quite down low but gets a little loud for a touring bike on top. This set up really maximises the triple wail and verifies the 1330 Ace has great performance potential on tap down the road.
To throw fuel on the thread fire, here is my 2 cents on 998 & 1330 performance difference. If I was hard riding at the same time a stock 998 RT, which I have driven, and my current version of my 2015 RT-S modifications. I would practiaclly have to burn up the 998 in trying to keep up with myself. The difference is the stock 998 has an instant hit of a v-twin but nothing in terms of long pull accelleration to follow up with. The 1330 has less of an instant hit but I would expect it to pull a bike lenght or two in each gear. Granted four bike lenghts in the 1/4 mile doesn't seem like much, but in the real world on the road the 1330 maximises the performance difference into a real passing difference. Especially two up riding where it's torque would really rule over the 998.
What will you do, when she finds out that you've been holding out on her??? :yikes:
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