DROP OFF OF HP

[OB_busagsx1300r]

I WAS WONERING WHY IT APPEARS ON THE DYNO THAT MY HP IS DROPPING OFF AT ABOUT 9800 RPM. IT PEAKS OUT AT ABOUT 8500 AND STAYS CONSTANT TILL 9800, AND THEN DROPS. IT JUST SEEMS LIKE IT SHOULD STILL BE CLIMBING AT 8500? WHAT DO U THINK?

 

[OB_c.dolan]

See other post. My hp levels: 9000 : 159 / 9750 : 163 / 10,500 : 161 / 11,000 : 156.7 // all uncorected @ 79deg. air temp. You may need PC II . What was your air temp, and barometer ? I PC II, dyno setting was 0 -1 +1. At dragstrip, best setting was +1 0 0 . I just fattened low setting for better throttle response.

 

[Frank Adams]

Speak on.....ATOMSMASHER<<<<<<<------!!

 

[OB_cbxchris]

Goes to show that yosh box is not piece of junk everyone thinks. I`ve got both and I think the yosh works as good if not better with much less hassle. See one of Bob`s old post ...he actually got better results with yosh box. Fire suit on and ready.......

 

[Frank Adams]

It called...Cam Timing.

Your Cams will only make what ever hp they were built for...

You can't get any more out of them, but you can roll your Cam Timing around to determine what rpm you want your hp to work at..

There is a lot that can be discussed about Cam Timing!!!

 

[OB_Cycle Stuff]

CBX, I will be dynoing my bike with the pc2 down in daytona. I will let you know then which one is the best for me.

 

[OB_THEATOMSMASHER]

not enough air period.

 

[Frank Adams]

In My opinion...if you know how to use the pw2 right and with a upgraded dyno with Model 250 specs (full load control) and purchased the real time air\fuel
monitor...then there is no doubt the the pw2 stands well above the yosh box.

How many of us out here with pw2's can really say we've honestly done the research to know what needs to be done when useing the pw2 on our Busa's?

There just a few but you never see much from them when the questions are being asked.

I had the yosh box setup on My Busa and couldn't get enough fuel to the bike, so I set it back to the factory setting and put the pw2 on and saw a 3.5hp gain right off the bat.

The pw2 has everything the yosh box has and then some.

You have a greater field to work with and this helps when it's dialing time.

And as far as the aftermarket goes...it looks like some of the suppliers are useing the pw2 to aid thier product.

I guess after useing both the pw2 serves My needs well.

 

[OB_Cycle Stuff]

Here is mine, it goes strong until 10500 and then starts to drop off. These are corrected numbers and barometric pressure was 29.91, vapor pressure was .21, intake air temp was 67.6 deg. F, gear ratio was 62 RPM/MPH, and the correction factor was .97 SAE.

RPM HP
9000 195.6
9250 196.9
9500 198
9750 199.6
10000 199.8
10250 202.1
10500 203.6
10750 201.9

And this was with a yosh box!

 

[OB_cbxchris]

Don you are correct in the proper hands with the right equipment the PC2 is without a doubt better but like Frank said who really has the equipment(ramair). Maps made sitting still are out the door when moving ...good base line yes.One thing that does come to mind though you can richen or lean the idle with the yosh which is not possible with the PC...correct me if I am wrong. All I was pointing out is for everyday blow joe the yosh is easier and does not cost as much if you can use one for free or small cost. The way that the ECM (remapped) is changed is up to debate which is better...anyone want to get into that...I`m all ears.

 

[Frank Adams]

<<I`m all ears.>> I think your more then just all ears!...lol!

These Dyno-Jet monitors are just now starting to filter through the industry.

I think a lot of maps are going to be changed with this technoligy.

And I think that every bike shop that wants to tune on the new bikes, needs to jump on board.

But at $9,200 for the upgrade, that will slow that from happening anytime soon.

This is going to be huge plus for the shops that do have it like Orient Express, thier going to be able to sell a product and then have a map for it!

Pretty much how we have to do it now is, buy whatever and then figure out how to get the best out of it.(su.cks)

Sometimes it gets old having to R&D everything.

Frank

 

[rotts4u]

If you WANT to use your PCII like a yoshi it can be done. For example if you want to add 5% fuel across the board at what Yoshi calls high. Just set all the settings to 5 on the PCII map abover 6000 rpms.

My question is WHY? The yoshi add a flat amount of fuel at all settings at certian RPMS. If you look at some of the maps that were developed on a Dyno with fuel air monitors you will see that at one rpm it needs say +15% then at the new rpm range sometimes just 1000 rpms away it needs -5% to get the optimun fuel air ratio with the exhaust sniffer. The Yoshi CAN NOT do this. It uses an average only.

So basically the PCII can do all the yoshi does then more. Plus its yours and on your bike and allows changes if needed if you go way up or down in altitide.

Don
RoadDog

 

[Johnnycheese]

I agree not enough air period.
I fell the need to gulp air but can't