Anyone have detailed explanation on how a PCIII USB works??

Higher RON has nothing to do with better burn or performance, the octane rating is just a rating of how much a fuel can resist auto ignition, basically a fuel's ability to exist in a combustion chamber with higher pressures, without detonating. A high octane fuel is used when combustion chamber pressures are very high, due to forced induction, a very high dynamic compression ratio or an aggressive ignition curve. Factory vfr800's have none of these criteria, so there is no reason to use high octane fuel and this is why regular fuel is recommended in the owners manual.

 

Yeah good plan. I went with a BMC back in 2009 and it fell apart after about 3 years, with no warranty. Then I went with pipercross, which looks great after about 2 years now and if it fails, it has a lifetime warranty.

 

how did you determine that where was a fair bit of extra fuel, only by looking at the map and not using an o2 sensor?

 

RC46...Yes...at 10% throttle from 0RPM -Redline. 1 map I have has a max of +27 and my tune from my blue 05 has a max of +11.
In some spots on the map it even has -4.

This is where it all gets a bit confusing and thus my original question. Trying to understand what the hell im looking at... and understand what all the numbers mean. More importantly how they affect the bike.


Thus, if I go back to factory spec, Service and Sync then start adding 1 piece at a time, learn what I can along the way.

 

Have you read the entire thread?

As he went to another map, the partial throttle engine shake reared its head. Thus we know empirically that over-fueling covered up the engine shake from the starter valve vacuum imbalance.

I see many instances in these blogs where every time someone mentions the partial throttle engine shake, a hoard of people jump in and tell them to get a fuel commander. This is a ubiquitous "solution" for many owners, including, in my humble opinion, the prior owner of this particular bike.

 

A cinco peso note says CR has done it and Knight is RTFM.

 

Jumping from assumptions to 100% fact conclusions is strong with this one

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True, and we may not have the entire story. But I know empirically if you fuel it at 3500, you can get the shake to settle down. (Doesn't mean it is running correctly...)

But your approach of measuring everything is robust!

 

Okay that makes sense. Looking at one map vs another. 27% of extra fueling over the factory map is quite a bit. Looking at my old power commander map I had made back in 09, my 10% throttle column had a max of only 12% extra fuel being added in the 5700-6500 area range.

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Now here is the world famous cozye map made specifically for a 2002-2005 with slip ons and o2 eliminators. We can again see a maximum of only 12% extra fuel being added on top of the factory fuel map, this time focusing in the 3000-5000 rpm range.

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So at this point, it seems pretty safe to say that the previous owner made too large of fueling changes over the factory fuel map.

Whether those changes were made as a bandaid for poorly synchronized throttle bodies, dirty fuel injectors, to compensate for extra air coming through pair valves that were not properly blocked off pair valves, an overly lean situation caused by the factory o2 sensors trying to correct the power commander or just simply made by a guy doing some butt dyno tuning with out a proper AFR reading setup, we can't say for sure yet.

But you can ensure that those factors are eliminated from the equation this time around and then have another properly done custom dyno tune made.

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Cheers guys,

I tend to agree with the idea that a crappy map was running. regardless who who set it up.

I have put everything back to stock except for o2 eliminators and exhaust pipe. I will load up the Power Commander tune for stock air filter and o2 elims but which pipe is close to my setup....no map for TBR...

I am working on getting the sync on the throttles done asap.

Cheers Guys.

 

Its pretty safe to say, a slip on is a slip on.

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Just double checking as my Microns had the Y pipe for better flow and my TBR has a single pipe.

 

A Y-pipe flows better than a single pipe?

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My understanding is that the Y pipe would/does allow more/better airflow as it can flow a greater volume.....both brands have the same diameter pipe from the cat to the start of the slip on's.

 

Both exhausts have the same diameter pipe at the cat....

It doesn't matter if you put five y pipes there, the exhaust still needs to flow through the first 12 inches of single piping, before hitting the Y and being forced to spit out into to separate pipes.

Think about this. Put one straw in your mouth. Now does it matter if that straw branches out into two straws at the end? Or are you still more or less breathing through one straw?

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For a I must to learn.....I will go in peace. Thank you Master.:redface: