power inc pipes

[methanolhemi]

Can someone tell me the differences between the
center dumps and the end dumps? I have center dumps
on my 600 triple now and I am looking into porting.
Am I losing power with the center dumps? Are they
worth 20hp on the 600? Any info would be great
Thanks

 

[goody_700]

With the end dumps, Yes, you would make more power over what you have. In my opinion, I would sell what you have and get the end dumps.

 

[methanolhemi]

Thanks

 

[Turk]

End dumps are good for a realistic 15 hp on a 600 alltho pipemakers claim more. They run good from 8200-8800 rpm. Centre dumps need to be 79-8200 rpm. They fall off huge over 8200.
I had a bud with a 600 sx-r with bender pipes & good porting. It dynoed at 128 hp at 8700 rpm.

 

[yamahauler4]

End dumps are good for a realistic 15 hp on a 600 alltho pipemakers claim more. They run good from 8200-8800 rpm. Centre dumps need to be 79-8200 rpm. They fall off huge over 8200.
I had a bud with a 600 sx-r with bender pipes & good porting. It dynoed at 128 hp at 8700 rpm.

Wow! Do the 700s fair better?? I hear reports of 135+hp, is that only with end dumps, or just exaggerated? Realistic dyno of 700 with centers?

DIdn't know pipes ran lower rpm, thought they were tuned for stock 8400.

 

[Turk]

Check em out on a sweedish dyno. Read em & weep. Lotsa bs hp figures on aftermarket pipes out there.

http://www.m-performance.com/Sidor/dyno_yamaha.htm

 

[methanolhemi]

Yea with the hp claims they make when you do the
math you get a BMEP of over 170 on pump gas.
Always seemed high to me for pump gas mods.

 

[yamahauler4]

Would like to see the stock dyno on that sled to benchmark. I find it VERY hard to believe that triple pipes only add 10 hp.