GStwin.com GS500 Message Forum

Main Area => General GS500 Discussion => Topic started by: commuterdude on July 12, 2008, 09:11:16 PM

Title: Pipe, airbox, and other mods....how much extra Horsepower?
Post by: commuterdude on July 12, 2008, 09:11:16 PM
What sort of gains can one expect by doing the typical drop in mods like a K&N air filter, new header/exhaust, etc?
Title: Re: Pipe, airbox, and other mods....how much extra Horsepower?
Post by: gsJack on July 12, 2008, 10:12:07 PM
About 3-4 HP gain.

http://gstwin.com/dyno_run.htm
Title: Re: Pipe, airbox, and other mods....how much extra Horsepower?
Post by: astroaru on July 12, 2008, 11:44:07 PM
lol
$1000 stuff for the 10% increase in HP? Hmmm... Does one feel the increase? The sound is definitely better agreed. But  :dunno_white: :dunno_white:
Title: Re: Pipe, airbox, and other mods....how much extra Horsepower?
Post by: Fry on July 13, 2008, 12:59:40 AM
Psychologically, we automatically assume (Most) that if it's louder it must be faster.
Title: Re: Pipe, airbox, and other mods....how much extra Horsepower?
Post by: pbureau69 on July 13, 2008, 02:14:31 AM
put the airbox k&N filter (model that fits intpo airbox) and you will enjoy it.. its does make a better response
also if you have a pre-04 model change your ignition rotor (search for it) and you will get better response as well

loud pipes dont make a bike go faster.
Title: Re: Pipe, airbox, and other mods....how much extra Horsepower?
Post by: metalforever on July 13, 2008, 02:39:15 AM
But an R1 can certainly makes it cooler :icon_mrgreen:
Title: Re: Pipe, airbox, and other mods....how much extra Horsepower?
Post by: ben2go on July 13, 2008, 12:39:18 PM
I'll say this for what it's worth.I didn't see any seat of the pants power gains.It did broaden the power band, make the power smoother,and throttle response better.I have a Bob B.ignition advancer,K&N lunch box,D&D exhaust,rejetted to 40/142.5/1 washer and 2.5 turns on the mix screws.
Title: Re: Pipe, airbox, and other mods....how much extra Horsepower?
Post by: The Buddha on July 13, 2008, 01:44:21 PM
5-10% gains with a Lunch box, and just sound and a bit of smoother driveability with just pipe. But in either case, its the mid range and the driveability ... useability that counts.
Cool.
Buddha.
Title: Re: Pipe, airbox, and other mods....how much extra Horsepower?
Post by: commuterdude on July 13, 2008, 06:12:27 PM
I'm definitely down with modding,  just want to know what the potential really is.   Don't want to spend mega $ which should really go into a more powerful bike if that is what I want.   I like wrenching, machinist by trade, improving drivability is  certainly worth a few dollars.   I'd like to get a pipe and progressive FE or Katana FE eventually.   Later I'd like to snag an SV650, it seems sort of like an updated GS, or a Ninja 650r.    Kind of like that Triumph street triple or Thruxton too.
Title: Re: Pipe, airbox, and other mods....how much extra Horsepower?
Post by: ben2go on July 14, 2008, 12:57:25 PM
Quote from: commuterdude on July 13, 2008, 06:12:27 PM
I'm definitely down with modding,  just want to know what the potential really is.   Don't want to spend mega $ which should really go into a more powerful bike if that is what I want.   I like wrenching, machinist by trade, improving drivability is  certainly worth a few dollars.   I'd like to get a pipe and progressive FE or Katana FE eventually.   Later I'd like to snag an SV650, it seems sort of like an updated GS, or a Ninja 650r.    Kind of like that Triumph street triple or Thruxton too.

I have less than $100 in my rejet,K&N lunch box, and exhaust.Knowing a good deal when you see it goes a long way to lower the cost of mods.I read that here and it is correct.I have 95% of all the mods I wanted done to my bike.It took me a little over a year to obtain the parts and mod my bike.I won't sell her unless it's an absolute have to.