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Old 09-14-2011, 11:32 PM   #1
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Makeing a 600 feel like a 1000

I removed the first stage flap valves from my throttle assembly, and I have at least 20+ bhp in the upper rpm. Got the hint from a friend with a connection with racing.
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Old 09-14-2011, 11:54 PM   #2
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In all reality you prob just created a nasty mid-range dip in the hp curve, and barely gained 1hp if anything. I don't think you get it anyway, but you would need to spend thousands building a 600 to get a real world 20whp out of it (assuming you had supporting mods and it was n/a)
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Old 09-15-2011, 07:42 AM   #3
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Quote:
Originally Posted by craig_gsxr600 View Post
I removed the first stage flap valves from my throttle assembly, and I have at least 20+ bhp in the upper rpm. Got the hint from a friend with a connection with racing.

I guess it never occured to you that what's good for a racebike might not be good for a street bike? This is a mod that is only done to racebikes that spend their entire lives at high rpms because those secondary butterflies help build more midrange torque. Oh, they also prevent the motor from falling on its face when you're not smooth with your throttle application. Oh, and they're also worth maybe 1 hp when they're working correctly. If you really feel like you got 20 bhp you either have the worst calibrated dyno in the history of the world OR your secondary throttle valve actuator was dead, and now you're getting full power.
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Old 09-15-2011, 08:25 AM   #4
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I think it "feels" like the bike gained 20+ hp...the bike probable was not running to its full potential to begin with...and now that he has the new throttle bodies all balanced ...it feels like it should...

I had the same feeling with my old busa...put slip-ons, power commander with custom map, K&N race air-filter, and smog block off plates....ALSO geared it down (one down front and 3 up back)...all these mods were done at the same time... The bike felt like it had MUCH more power...the dyno showed different..

To someone that rides the same bike daily..even a little change is magnified..
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Old 09-15-2011, 10:39 AM   #5
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It feels like I gained 20hp, but probobally didn't. I also have a GLpro with ATRE (Advanced Timing Eliminator) and a Yoshi tri oval race pipe.

The intake was balanced at a delearship a few days ago. The power in the low end is a little sluggish, but the top end feels great.

I can always put the valves back in. It only took 20min to do.
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Old 09-15-2011, 10:50 AM   #6
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Quote:
Originally Posted by Bevo View Post
I'll bet is was closer to 19.499hp
Thats funny. Who knows how much, but it feels like I have alot more in the top end. We can race at TWS (Texas World Speedway) in a couple of months if we switch bikes. You are too good on that 1000rr with abs.
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Old 09-15-2011, 11:23 AM   #7
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Old 09-15-2011, 11:25 AM   #8
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Quote:
Originally Posted by craig_gsxr600 View Post
I removed the first stage flap valves from my throttle assembly, and I have at least 20+ bhp in the upper rpm. Got the hint from a friend with a connection with racing.
A connection in racing? A friend of a friend of a friend huh. Everybody has a connection in racing if that counts...even Kevin Bacon. Mario Andretti was in Cars in 2006 with Paul Dooley who was in Telling Lies in America in 1997 with...guess who...KEVIN BACON!
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Old 09-15-2011, 12:11 PM   #9
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Quote:
Originally Posted by craig_gsxr600 View Post
It feels like I gained 20hp, but probobally didn't. I also have a GLpro with ATRE (Advanced Timing Eliminator) and a Yoshi tri oval race pipe.

The intake was balanced at a delearship a few days ago. The power in the low end is a little sluggish, but the top end feels great.

I can always put the valves back in. It only took 20min to do.
I had an 04/05 gsxr 600. I am very familiar with them. Your bike had a problem before, a common problem associated with the secondary throttle valves. Removing them removed one problem, but adds others. You are better off reinstalling them, and fixing the problem. Also, if it only took 20 minutes, you didn't seal the shaft holes, and you now have leaks.
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Old 09-15-2011, 12:29 PM   #10
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Not necessarily. He could have just removed the butterflies and left the shaft in. Either way it dosnt matter. This thread should just quit while its behind. I have read a few times times about this.being done on drag bikes and while some swear it is night and day difference most don't notice anything or feel like it has lost power. I can only recall one that was put on a dyno but there was no gain. So if you feel a 20hp difference then you had a problem to begin with or you forgot.to mention you also added a small shot of.nitrous.
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Old 09-15-2011, 12:38 PM   #11
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Quote:
Originally Posted by po-po 5.0 View Post
I had an 04/05 gsxr 600. I am very familiar with them. Your bike had a problem before, a common problem associated with the secondary throttle valves. Removing them removed one problem, but adds others. You are better off reinstalling them, and fixing the problem. Also, if it only took 20 minutes, you didn't seal the shaft holes, and you now have leaks.
I had to replace the throttle body because the old servo motor broke. When I was waiting on the parts, they pinned open the upper butterflies. Realised the bike had more power, or at least felt like it. When my parts were installed the bike didn't feel like it had the same power at the upper rpm range. I removed the upper butterflies and left the shaft in. There are no leaks, just more air entering the throttle body hense the feeling of more power.
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Old 09-15-2011, 12:40 PM   #12
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If it feels good to you..then, keep it that way...
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Old 09-15-2011, 12:42 PM   #13
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If it feels good to you..then, keep it that way...
Will do, thanks.
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Old 09-15-2011, 12:43 PM   #14
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Old 09-15-2011, 12:44 PM   #15
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Quote:
Originally Posted by craig_gsxr600 View Post
I had to replace the throttle body because the old servo motor broke. When I was waiting on the parts, they pinned open the upper butterflies. Realised the bike had more power, or at least felt like it. When my parts were installed the bike didn't feel like it had the same power at the upper rpm range. I removed the upper butterflies and left the shaft in. There are no leaks, just more air entering the throttle body hense the feeling of more power.
I am well acquainted with the secondary throttle valve actuators, and their failure. A little more research would have turned up the fact that the actuator just needs 4 joints resoldered to be functional again. A bike with a dead SVTA is down 20hp, but wired open or functional vs removed is nothing.
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Old 09-15-2011, 10:29 PM   #16
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Something to think about. Feels like more power now, so I will leave it like it is. Thank you all for your input.
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Old 09-16-2011, 12:51 PM   #17
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That is funny.. I mean I litterally laughed out loud.. and I was in need of a laugh... crapstatic morning..

Thanx

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A connection in racing? A friend of a friend of a friend huh. Everybody has a connection in racing if that counts...even Kevin Bacon. Mario Andretti was in Cars in 2006 with Paul Dooley who was in Telling Lies in America in 1997 with...guess who...KEVIN BACON!
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Old 09-16-2011, 01:09 PM   #18
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Quote:
Originally Posted by brandontx View Post
A connection in racing? A friend of a friend of a friend huh. Everybody has a connection in racing if that counts...even Kevin Bacon. Mario Andretti was in Cars in 2006 with Paul Dooley who was in Telling Lies in America in 1997 with...guess who...KEVIN BACON!
That's not fair. Everyone knows there are 6 degrees of Kevin Bacon.
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Old 09-16-2011, 01:19 PM   #19
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Old 09-16-2011, 07:03 PM   #20
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If it feels good to you..then, keep it that way...
+1
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