RB3 VS Power Commander lll
- Thread starter traveler
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MTdream
Well-known member
I have tried figuring this out many times...it seems we might not get an answer...
Ok so maybe I need to get more specific...
what is needed with RB3 to get lean/fat setting (fuel ratio)
What is needed with PCIII to get lean/fat setting (fuel ratio)
Is Boost Gauge part of either or add-on?
Is Boost Control part of either or add-on?
Ok so maybe I need to get more specific...
what is needed with RB3 to get lean/fat setting (fuel ratio)
What is needed with PCIII to get lean/fat setting (fuel ratio)
Is Boost Gauge part of either or add-on?
Is Boost Control part of either or add-on?
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I don't know if it is valid but my way of thinking on this one is the more modules and boxes the more parts to get wet and fail or whatever. The Powderlites kit uses the RB3 so if a guy puts one on his NA sled you are already ahead of the game cause you can reuse the RB3 if you turbo down the road. Honestly once you get the map dialed in are you really ever going to mess with it on the hill again? I don't think I would.
M5
M5
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Duke
Well-known member
Once the RB3 is set, you dont mess with it, I have two maps, one is for pump fuel 15#'s boost, the other is for race fuel and high boost. Baseline mapping pretty much needs to be done on the dyno unless you can borrow a good map from someone else with a similar application. I ran an entire year with no issues, after mapped the sled ran perfect all last season, the box was even sitting in the nose of my Apex, I havent heard of one fail yet.
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traveler
Active member
Hey, Thanks for the replies.
AA, Due you run an A/F gauge on the Apex? If so what do you see for ratios?
and does the RB3 altitude compensate automatically?
Niether system is a closed loop system. They will not adjust automatically using the A/F guage. You should be looking for mid 13's on the bottom and cruising and 11.9-12.4 WOT depending on your fuel and timing curves.
The RB3 is not altitude sensing but I have run my maps at good altitude differences and it doesn't seem to change much. You just increase the boost a bit for altitude.
Until more people get involved in creating base maps for each set up each system will take some fine tuning. Once it is dialed in they work great.
Sap
The RB3 is not altitude sensing but I have run my maps at good altitude differences and it doesn't seem to change much. You just increase the boost a bit for altitude.
Until more people get involved in creating base maps for each set up each system will take some fine tuning. Once it is dialed in they work great.
Sap
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Duke
Well-known member
I do run an Air/fuel gauge, it's in the low 12's, at 20#'s boost at WOT. I have also double checked with another O2 sensor. The box does not self-compensate, only the stock fuel injection system does. I really haven't seen a need for it, always runs great. I am also running a parker knock box too.
There are some guys playing with a Closed-loop fuel injection system that automatically adjusts. It has many features, more info will be available if it turns out to be sucessful. I believe they have had it running on a stock Apex already. Would be expensive if it works out.
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traveler
Active member
Thanks again for the comments, I understand dynojet is comming out w/ a closed loop system starting w/ 09 cycles (PC 5), rapid bike has their RBO2, but I would think both sytems are a year away (or more) from being on a sled.
My concern is running alt from 8-13k ft. I was told by a dynojet dealer that the yamaha stock ecu compensates for alt and only one map would be needed for the PC lll, reguardless of alt. and sure you can create more maps for economy or different boost.
Does the RB3 just add to the stock ecu? If it does then I assume it will compensate. or do I need maps for different elevations?
Thanks
My concern is running alt from 8-13k ft. I was told by a dynojet dealer that the yamaha stock ecu compensates for alt and only one map would be needed for the PC lll, reguardless of alt. and sure you can create more maps for economy or different boost.
Does the RB3 just add to the stock ecu? If it does then I assume it will compensate. or do I need maps for different elevations?
Thanks
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Duke
Well-known member
The RB3 is just a piggy back, you are just modifying the stock fuel curve. Nice thing about them is the ability to adjust timing throughout, and there are hundreds of adjustment points in the fuel curve vs only a handful.
The box itself doesn't compensate, I ride from 2500 to 9000ft, all on the same map. IMO, I would wait to see what the next 2 month brings, there is lots going on. As far as the RB3, if you are guaranteed a good map I would go for it, they work very well.
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Closed loop fuel system
Yes , its has been ran on a stock apex , its being installed on a turbo apex now and will be testing on the dyno soon , and yes it does automatically compensates for allitude and inlet air temp.
It is only a closed loop system when it is in the tune mode , you can set it up to be in CLC useing different setting (Low RPM , Low Boost , low throttle body openings ) So you can run leaner at low load conditions in the CLC mode and then go back to what it learned when it was ran in the tune mode. This is done so you do not burn your motor down do to a bad A/F senser .
If this system works out , it has many benifits , up to 4 or 5 D mapping auto tune ( boost , throttle body position , camshaft senser etc ) , build in knock senser that will automatically retard timing at a preset rate until knock stops , builded in data prologer , etc .
Will have more info in a couple weeks .
Yes , its has been ran on a stock apex , its being installed on a turbo apex now and will be testing on the dyno soon , and yes it does automatically compensates for allitude and inlet air temp.
It is only a closed loop system when it is in the tune mode , you can set it up to be in CLC useing different setting (Low RPM , Low Boost , low throttle body openings ) So you can run leaner at low load conditions in the CLC mode and then go back to what it learned when it was ran in the tune mode. This is done so you do not burn your motor down do to a bad A/F senser .
If this system works out , it has many benifits , up to 4 or 5 D mapping auto tune ( boost , throttle body position , camshaft senser etc ) , build in knock senser that will automatically retard timing at a preset rate until knock stops , builded in data prologer , etc .
Will have more info in a couple weeks .
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traveler
Active member
sounds interesting, whose system is it?
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Duke
Well-known member
OK here is what I want to do. I'm building my light weight Nytro chassis right now but I'm going to ride my RXT till I see what Yamaha comes out with for 2010. So as a result the Nytro is relegated to wife/backup sled, but i still want a little more out of it. I've got a header and muffler for it plus I'm going to do some airbox mods so it would likely benefit from new fuel and timing maps. The big clincher is I have a nitrous system that I want to slap on there so I want to do the nitrous fuel and timing with the stock injectors by instantly changing the map. I want the new maps to activate when I hit the Nos button then return to normal when I release it. Which system can do this best? I'm leaning towards the RB3 because if I turbo the Nytro I'll likely do a Powderlites kit and won't need to buy the programmer as I'd already have it.
M5
M5
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Duke
Well-known member
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traveler
Active member
Nytro w/MPI stage ll 14-15 psi
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