d_lucas60
Parking Attendant
Posts: 9
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posted September 22, 2008 07:32 PM
REV LIMITER IN 5TH GEAR AROUND 165/170 MPH WITH HARD ACCELERATION ???
Has anyone had any problems when passing 165 or possibly 170 mph with revs retarding around 8000 rpms ??? Hard to pinpoint speed while keeping an eye on the road and accelerating.
My setup is the following: TRE (1st released unit), powercommander (mapped to full muzzy exhaust with flies removed), and full muzzy exhaust. The air-fuel mismatch has been known to be about the same for both the removal of flies or TRE setup, so this is a pretty good map and the it's the only one powercommander has for a full-system muzzy exhaust.
And the story is as follows: hard acceleration and up to red-line in 1st through 4th, without any hesitation. 5th climbed and accelrated as hard as the first 4 gears but did not pass 8000 rpm. Once I noticed this retardation at 8000 rpm and maintaining speed around 165/170 mph I shifted into 6th and accelerated to 180 mph without a problem before having to slow down.
Let me add that I was in the mountains and I live in Colorado, so I was probably up to about 10,000 feet. And no, the map is not specific to this elevation. I was able to do this twice with the same results both times.
Any information would be greatly appreciated. Thanks, Dave.
  
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dbeadling
Zone Head
Posts: 699
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posted September 22, 2008 08:29 PM
no air up there
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MJ
Zone Head
Posts: 560
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posted September 23, 2008 03:17 AM
Yep your just plain running out of power. High altitude sucks, and at 10k feet your losing a TON of power. You lose 3% for every 1000 feet. So you can kiss 30% of your rwhp goodbye. You basically have a 600's power trying to move 550 lbs of motorcycle. Thats why its struggling to wind out the mega tall 5th and 6th gears 
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Shane661
Needs a life
Posts: 11494
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posted September 23, 2008 04:10 AM
It's not the air if you were able to pull 6th gear.
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street racer
Expert Class
Posts: 141
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posted September 23, 2008 04:59 AM
Better check you speedometer/tachometer/gearing. Something is wrong with your calculations as 8,000 RPM in 5th gear is only 136 MPH not 165/170.
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derpie
Expert Class
Dont judge a book by its cover
Posts: 269
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posted September 23, 2008 07:01 AM
toss the tre lose the flies
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fifth
Expert Class
The Magnificent Bastard
Posts: 303
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posted September 23, 2008 02:42 PM
and I don't the the TRE with flies can hold a candle to the no TRE no flies setup.....
ditto on the toss the TRE and lose the flies.....
also, send muzzy an email with your setup and elevation....they emailed me a map that is the best I have tried to date......
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joemugg
Expert Class
Posts: 109
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posted September 23, 2008 03:47 PM
Yep, I had Ivan's TRE and then an ATRE. No contest on either one, flies out is a whole different animal.
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'06 ZX14 blue, Muzzy M14/M10, flies out, BMC filter, PCIII, SpeedoHealer, Scott's Steering Damper, 16 tooth Vortex
'97 GSXR600 street sweeper
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bawls
Needs a job
re-learning to ride
Posts: 2701
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posted September 23, 2008 08:16 PM
Try it with the tre removed and see if it does it. Or maybe it was just a one time thing. My bike fell on it's face at 4000 rpm the other day when I got on it hard on the freeway. I haven't been able to repeat the problem though.
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Best 60ft: 1.42
Best 1/8th: 5.97
Best 1/8th MPH: 119
Brockland Police Badge # 001
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