FMF finally answered
Posted November 05, 2003 - 06:28 AM
Posted November 05, 2003 - 09:26 AM
Posted November 05, 2003 - 12:39 PM
FMF told me 3 to 5 hp
Weird? I have some difficulty to believe that an aftermarket pipe, even a Q, could be sold at that price for only 1.5hp gain but that's what they told me... have a look at his message:
"The Q-muffler will only add about 1.5hp increase overstock but that muffler
is designed to stay under 96 db's."
How many HP can you gain with a Ti-4?
Posted November 05, 2003 - 06:13 PM
Posted November 05, 2003 - 06:26 PM
Thats a lot of money for 1.5 hp.
I'd be happy with any silencer that meets 94db on a 450 and would make the same power as stock. You say it makes 1.5hp more than stock??? BONUS!
Posted November 06, 2003 - 06:57 AM
Are you sure their gains aren't compared to a stock, corked up exhaust?
You cannot uncork a canadian exhaust! Unless you cut it with a steel saw and build a fitting for an after market endcap or insert to bolt on.
I'm not sure the guy at FMF was comparing it to a fully stock pipe or to an unplugged US pipe... I'll ask.
As for the powercore 4 + the quiet insert solution, what is the performance? What quiet insert?
Posted November 06, 2003 - 07:16 AM
Thank you for your answer.
Me and other guys on T-Talk want to make sure about something http://www.thumperta...c=1&PHPSESSID=.
Is the Q producing a 1.5 HP bonus over the stock or over the uncorked exhaust?
Second, some mentioned that the Powercore 4 muffler with a quiet insert could be as quiet as the Q. Do you have any info? Is there a Powercore 4 quiet insert available? What about the sound level and performance of such a combination over a fully stock canadian or US pipe?
Thank you for you help
Posted November 06, 2003 - 08:38 AM
Posted November 06, 2003 - 11:05 AM
Posted November 06, 2003 - 12:09 PM
It looks like the Q improves the YZ250f stock pipe by almost 3 HP. My canadian pipe is much more restrictive than a YZ pipe so I guess I could obtain at least a 3-4 HP gain with a Q compared to my stock canadian pipe.
Here are the comments of Chris about the PowerCore 4 and its available FMF quiet insert.
"The Q does produce more power over the stock muffler. The Powercore4 does produce more power than the Q-muffler it just doesn't meet the 96 db law. We do sell a quiet insert for the muffler, but only makes it quieter by two db's. You can get that muffler pretty close to 96 db's or maybe even on the dot. If you repack the muffler using steel wool first then fiberglass packing, using the quiet insert, & changing the end-cap to the spout style."
End of quotation.
I might get one of those FMF finally...