These tests were conducted a few years ago on a customers LT 500 that had the below set up and a Trinity pipe and silencer, The information below is what I know to be accurate. The customer said the ports and head were stock. I did not remove the top end to varify that it was a stock cylinder and head. The power valve was operational and optimized for each pipe the best it could be due to the power valves inconsistant operation from run to run. The jetting was optimized for the trinity pipe but not for the Q or HPR pipe. The jetting was closed enough for the Q and HPR pipe and would not significantly affect the relative power curve shape from one pipe to the next.
The test were conducted at 1100 ft elevation on the same day within a few hours of each other. Intake temperature was 73 to 77 deg. F with humidity in the 37 to 40 % range. Correction factors were in the 3% to 4% range.
HPR TM 41 Mikuni, 540 Main jet, 27.5 Pilot jet, R6 389 Needle Jet, 6DK3-3 Jet Needle, 4.0 Cut away, Duncan Paramid reed cage, RU 3480 K&N Mounted to stock LT 500 air box hose, Power valve is operational,
Blue HPR 9 pipe and silencer
Red Q1.0 stamped pipe and silencer
Green Trinity pipe and silencer
Thank you for posting these graphs Jerry. What year top end? and to be clear that was a #09 HPR pipe.
Wow! At no point does the Trinity pipe even begin to compare to the others.
Thank you for posting these graphs Jerry. What year top end? and to be clear that was a #09 HPR pipe.
The cylinder was a 1987 large reed cylinder.
The pipe was HPR #9 not HPR #19
The guy brought the quad in to have a big carb put on it and dyno tuned. There were two other quads in the shop for top end jobs and their pipes were off. One had a HPR 9 pipe that we had build a few years prior and the other quad had a Q 1.0 pipe. The owner of the Trinity piped quad saw the two large diameter pipes off of the other 2 quads and he wanted to know how the power of the Trinity compared to the "fat pipes". I told him I had not tested a Trinity but the pipe looked like a Power Pros pipe I had tested a year or so prior. We tuned his bike with the Trinity pipe and then we called him so that he could watch the pipe test. He was not very happy after the pipe test because he had recently purchased the pipe after seeing it in one of their big shiny adds in a magazine.
Which style of Trinity pipe was tested? Old style in the mid 90's my buddy had a Trinity pipe on his LT500 that was the traditional FMF, DG, Bills style of pipe routing. The Trinity pipe that is available today is the side pipe inframe style similar to Aaeen, Q, ect.
Which style of Trinity pipe was tested? Old style in the mid 90's my buddy had a Trinity pipe on his LT500 that was the traditional FMF, DG, Bills style of pipe routing. The Trinity pipe that is available today is the side pipe inframe style similar to Aaeen, Q, ect.
The Trinity pipe that was tested leaves the cylinder and angles slightly to the left and then stays on the left side of the quad. The pipe is not as fat as the Aaen or Q pipe. It has a two piece, two angle tail cone. The cone next to the mid section has a much steeper angle than the cone that the stinger is attatched to.