Top Speed

Those are Harley umbrella girls.

 

That is a female????

 

I was thinking along the lines of this

Possibly NSFW

https://s-media-cache-ak0.pinimg.com/736x/31/72/05/317205f85eb078eb666159bbc078ea61.jpg

 

ouch, I cringed on that one! Damn.

 

I have never gone above 131 Mph on any bike that I have had due to head shake from Wendover Utah to Elko Nevada (1995 Kawi Gpz1100, 2003 Suzuki sv1000s). Note that I have never had a bike with a steering damper. Also note that when I wanted to test the top speed I had Dunlop tires on both bikes that have always cupped for me within 2,000 miles. I am hoping that they do not do the same due to putting some on the current bike. I did Really like the Michelin tires on the SV and look forward to testing out the EVO 30's next tire change.

 

Hi Lint

Yes you did =)

Hi SML
Thanks, goal is do a dyno test as is, nearly stock, and after install catless headers from 1998 bike, and do the exact same road to see how she behaves, as well as a new dyno test, (no need to say in the same place) so that finally we all know exactly the differences/ gains when catless headers are fitted.
I'll posts all updates, as soon as I have "time" to do them; I have found so much good information here, I'm happy to share.

By no need to say in the same place, I meant I will do it in the same shop, in the same dyno, so to have comparable data.

Attached pic of yesterdays dyno run, will post short video "just because" on youtube soon.

Now the "fun" part will be compare acceleration, TOP Speed, and dyno run when I mount the catless headers from 1998 5th gen, to understand actual gains... it will take a while though, maybe in July or so.



Also, after analysing graph with my mechanic, we've reached the conclusion that I should change gears at 10.500 rpms, as it's when hp power curve starts decreasing, and that should allow me to accelerate fast through out all gears =)

In spite of graph has RPMs, in the computer we could also see the graph with Km/h, and she reached redline in 06th gear at 269 Km/h, meaning in theory she can do 280km/h or so on the speedo, just a matter of spending enough dollars to do so :/ to unleash all she gots =)

Can Santa offer me the A&A supercharged kit pleaseeeeeeee lolololol

 

To maximize power don't you want to shift well after hp starts decreasing? Pretty sure you want to maximize the area under the hp graph... maximize maximize maximize

 

Hi PawnBoy

Well that's not what I was told, exactly the opposite, as you want to accelerate whilst HP power curve is growing untill it reached it's max, not accelerate when it's decreasing.

I confess I was a bit surprised when he explained it to me.
I asked because I have ordered a raptor shift light, and as redline is reached at 12.200 rpm, I was telling him I will set the shift light to 11.900 rpm, so to avoid constantly revving engine to the max.

And he explained, I actually should set the shift light to 10.500rpm, since afterwards power curve starts decreasing, thus only on 06th gear it is worth to go beyond that...

But this is sounding like the perfect excuse to do a couple of videos, comparing how fast she accelerates shifting at 10.500rps and shifting just before red line =) =)

 

We cannot be certain that is an ad for Harley-Davidson. We can be certain that the chica is not one of the Beach Boys.

 

Close, but no cigar..

 

I don't know the drive ratios for the bike, but here's an explanation for an S2000
Engineering Explained - When To Shift Gears For The Fastest Acceleration

Another method of finding out the optimal time to shift would be to dyno in every gear and then plot the power curves for each gear on the same graph against speed. Where the lines intersect are the speeds you should shift at.
Gear Powers vs Speed

Explained simply, the only times you want to shift are when the engine is making power less than or equal to what it would in the next gear, or at redline.

But really, Candy should make an appearance and tells us what's what, I think he's the resident drag strip artist.

 

Explained simply, the only times you want to shift are when the engine is making power less than or equal to what it would in the next gear, or at redline.

Yap that makes sense to me =) it's kind of what I wrote below, but agree Ideally would be knowing power curve for each gear.

as you want to accelerate whilst HP power curve is growing untill it reached it's max, not accelerate when it's decreasing.

 

So I took your power graph, gear ratios from the 2009 6th Gen owners manual, tire diameter from an online calculator, and did some MATH!



P.S. Just to clarify, the tire diameter and speeds calculated really don't matter, they just help ground the results in reality (unless you want to shift by speed). All that matters to get the power curves to intersect is the gear ratios.

 

Awesome!!

Got Love a spreadsheet with Sanity check cells =) =) thumbs UP!!!

I'll try to find 5th Gen gear ratios, so that you can update spreadsheet.

But with 6th Gen gear ratios, looks like 10.900rpms is the sweet spot to shift

 

Good stuff here , One of the reasons I'm now working it to get a header built to be able to take the power delivery all the way to 12,200. Your 108hp looks like mine, then I added a PC3 and got 111.6 hp, but it tabled off just above 10,400rpm.




The gentle man that was doing the tuning says that's a perfect example of the exhaust gases not getting out of the way, the fix is a better flowing system so now I'm working to fix that. http://vfrworld.com/forums/showthread.php/52559-Help-fund-the-VFR-header

 

Only for 5th! Every gear is different! I totally screwed up 2nd gear though in that image, I guessed that 2nd and 3rd intersected at 130, when they intersect closer to at 134.
Makes the shifting RPMs 1st: REDLINE, 2nd: 11883, 3rd: 11537, 4th: 11243, 5th: 10989

About 200rpm (ish) less for each consecutive gear.

Also, plugging RVFRs power curve in provides pretty different results: 1st: REDLINE, 2nd: REDLINE, 3rd: 11876, 4th: 11520, 5th: 11467

But again, this is just estimating.

 

I tried to upload the excel sheet to google drive so people could play around, but apparently google sheets hate scatter plots ¯\_(ツ)_/¯

 

Crap, all this precision is kinda beyond me. First revs so fast I just grab a gear whenever -- usually around 10Kish. Second has me so far over the speed limit it becomes moot. I hate being a good citizen on the streets. I have to get back to track days so I can use the rest of the gears.

Interesting theory though. Better than my old method of just holding the shifter up until I hit the rev limiter, which is just a poor man's quick shifter, right?

 

And what the hell happened to her ars?


Sent from my iPhone using Tapatalk

 

The only time I'm really interested in top speed is on The Dragon or when going through decreasing radius turns. Come on, back to reality.......