Thanks everyone for your input.
canyncarvr said:
Please post the comments from CDave's site that you are referring to.
This is what I read from Canadian Dave:
ENGINE MODIFICATION – GETTING THE MOST OUT OF 200/220 cc
1995 - 2003 KDX200/ 1997 to 2003 KDX220
(Notice this is for BOTH sizes of kdx)
If you are looking for more bottom end to mid range power then I would suggest the FMF Torque pipe. Model K-G35
If a stronger mid range to top end is what you’re after then either the FMF Rev pipe (model K-G30) or the Pro Circuit pipe (model PK95200DP) are excellent choices.
When selecting a pipe it is important to remember where you would like the most power focused. A torque pipe will steal a little top end power in trade for improved bottom end performance. The reverse is true for a rev pipe. A torque pipe will allow the KDX to pull hard off the bottom with a less abrupt mid range hit than the rev pipe. The rev pipe gives up some bottom end power and has a more abrupt, authoritative midrange hit and more top end power. Either pipe will make more power everywhere when compared to the stock pipe.
Its important to note that because of differences in port timing the KDX200 and 220 don't react the same to each pipe.
Installing a Torque pipe on a KDX200 will improve performance over the stock pipe from idle to wide open throttle. However installing a torque pipe on a KDX220 will improve performance from idle to about 7500 rpm then fall flat just like the stock pipe with no meaningful increase in over rev or higher rpm performance.
If you're looking to improve your 220's power delivery from the bottom to top end then a rev pipe is a must.
He does NOT say the '..rev pipe acts like a torque pipe.'
He DOES reference advertising that says that, but he doesn't. It's that the -30 improves the 220 all-round that gets it the 'torque' monicker in some ads.
But the rev pipe does NOT act 'like a torque pipe.'
Guess I said that already.
Maybe I'm the one missing something. I read what CDave says and it makes perfect sense to me...evidently not the 'perfect sense' others get from it.
How's that? All better?
I did understand that some shops advertize it that way and that Dave himself was not saying it. What I thought was a little confusing was the article by Dave where he states, exactly what you have written, "However installing a torque pipe on a KDX220 will improve performance from idle to about 7500 rpm then fall flat just like the stock pipe with no meaningful increase in over rev or higher rpm performance.
If you're looking to improve your 220's power delivery from the bottom to top end then a rev pipe is a must."
But then in the comparison article by MnKDX'er it stated "220 w/ torque pipe, stock carb, and aftermarket silencer- Nice power increase
across the powerband similar to the 200, however the 220 still does not turn the revs that a 200 will spin happily............220 (w/ bored carb, Reeds, and aftermarket silencer) Rev pipe, vs. Torque pipe- Comparing the rev pipe to the torque pipe, on this bike shows the
rev pipe with a definite loss of low end power and a small increase in top end power."
You're right, I'm probably just not understanding, I just didn't feel they were saying the same they and wanted some opinions from some others. Thanks again for everyone's input.