Author Topic: Pipe shape Diff (Read 3452 times)

ytman · « **on:** April 09, 2014, 08:14:51 PM »

In theory.....what should the difference be in the performance of these two pipes? Both came on used bikes that I have purchased and don't remember ever running. I think one is a PT and the other (based on internet info) is a Trinity. The PT is fatter with smooth transitions and the Trinity ramps up quick and squeezes back down just as quickly.
This is merely conversation as I am many miles and months away from home and these pipes.

I just like two stroke stuff

rsss396 · « **Reply #1 on:** April 09, 2014, 09:53:22 PM »

The left will probably have a wider power spread while the right will be narrower power spread with a chance of making the most power but only if it works with the motor.
It's not very common to have a multi angle rear cone of the pipe but they can work if developed correctly

ytman · « **Reply #2 on:** April 10, 2014, 06:35:53 AM »

Being a smaller diameter pipe, the one on the right, would you say bottom to mid or mid to top? It was actually used to race in the Mickey Thompson series

rsss396 · « **Reply #3 on:** April 10, 2014, 08:04:42 AM »

without measuring anything its really hard to guess how something will perform, hell even measuring and building them many times its hard to predict

but just shooting from the hip I will say its a mid-top pipe but thats just a guess, it looks to be shorter than the left pipe so that is my reasoning for my thinking its a mid top

Jerry Hall · « **Reply #4 on:** April 10, 2014, 11:42:20 AM »

Quote from: rsss396;31272

The left will probably have a wider power spread while the right will be narrower power spread with a chance of making the most power but only if it works with the motor.
It's not very common to have a multi angle rear cone of the pipe but they can work if developed correctly

Yes we see trends over the years as related to pipe lengths and diameters and how it affects performance.

I have seen a few pipes that were visibly different. One being about 2 inches different in diameter in the belly section and appeared to be about the same length from the piston to stinger. The dyno curves of the two pipes laid on top of each other and looked like the same exact power curve.