killerbusa07
Registered
Hey, does anyone know if the busa cuts fuel or spark when hitting the rev limiter.
Rev limiter, does it cut fuel or spark?
- Thread starter killerbusa07
- Start date
:bump:
It is been some time since I was looking into the 02-07 ECUS, but it will initially cut the fuel to two cylinders (or was it on half the revolutions) in what some refer to a soft rev limiter. A 2-3 hundred rpm later it will hit a hard limit and cut all injectors and spark.
This makes it pretty dangerous spraying and bumping the limiter.
This makes it pretty dangerous spraying and bumping the limiter.
O
outtahand
Can you go into what happens when you spray and bump the limiter?
You will go lean causing melted pistons, hammered rings, burned off plugs, ect. The damage from a lean condition on a nitrous application is catastrophic. If you get out of the limiter quickly you can save the motor. It is best to set the nitrous up on a window switch which would shut if off a few hundred RPM's before the limiter. Better safe then sorry.
it is refered to a soft cut,it is fuel,and that someone has already stated it is un-safe to hit the rev liniter on a nitrous or forced induction powerplant.this can be changed very easily with the stock ecu to a hard cut,no fuel to all cyls.there is a lot more features that is available to us within the factory ecu such as,kill feature for a air shifter, unifying all cyls to use the same fuel and ignition maps, a map switching feature that allows us to switch maps on the fly for different applications,use the flap circut as a shift light or to activate nitrous,remove the factory speed limiter,raise the rev limit to as high as 12,000 and many more!!!
Last edited:
O
outtahand
Any reason the thing wouldn't be designed to prevent this from happening?
I'm not sure what you are saying here, but the window switch is what will keep you safe. Program it to come on at a certain RPM and shut off BEFORE the limiter. You can do the same thing by re-flashing your ECU. The point is, cut off the nitrous before the limiter comes on.
Can't wait until they break the Gen II ECU's.
there is a hard cut and a soft cut, you can overcome the soft cut with the ecu re flash you can also raise your limiters and remove the speed restriction and for the big engine guys you can make it so the engine will fire at lower rpms when your trying to start it
ECU Flashing here is the link to the wire harness and the software! 180$
you can also
tune the vacuum area maps, TPS maps, ignition maps, making your engine run very smoothly when cruising, and put down as much safe hp to the ground as possible. view engine sensor data to ensure correct operation of vacuum, ambient air, temperature, tps, gear position etc. sensors with a laptop connected.
ECU Flashing here is the link to the wire harness and the software! 180$
you can also
tune the vacuum area maps, TPS maps, ignition maps, making your engine run very smoothly when cruising, and put down as much safe hp to the ground as possible. view engine sensor data to ensure correct operation of vacuum, ambient air, temperature, tps, gear position etc. sensors with a laptop connected.
# Ability to view all sensors data with a laptop connected
# Ability to datalog all factory sensors on the motorcyle with a laptop connected for use in dyno tuning.
# Ability to change fueling maps (both IAP and TPS maps), ram air compensation
# Ability to change ignition maps (you can add timing in the lower gears like a TRE does without messing up your gear based fuel curves)
# Increase your factory rev limiter (current software supports up to 11,650 RPM, more RPM is possible)
# Remove the 6th gear speed restriction with the click of a button
# Change ram air compensation based on your gearing
# Compensate for larger fuel injectors needed for high hp applications
# Compensate for increased fuel pressure needed for high hp applications
# Increase ignition dwell time (turbo guys will like being able to open the plug gap back up some)
# Disable IAT compensation for dyno testing
# Turn your ECU into an ignition / fuel kill box for use with an air/co2 shifter
# Control a shift light, or any RPM based output using the stock flapper valve circuit
# Switch-able map selection for NOS, different turbo boost levels, fuel types etc
# Ability to datalog all factory sensors on the motorcyle with a laptop connected for use in dyno tuning.
# Ability to change fueling maps (both IAP and TPS maps), ram air compensation
# Ability to change ignition maps (you can add timing in the lower gears like a TRE does without messing up your gear based fuel curves)
# Increase your factory rev limiter (current software supports up to 11,650 RPM, more RPM is possible)
# Remove the 6th gear speed restriction with the click of a button
# Change ram air compensation based on your gearing
# Compensate for larger fuel injectors needed for high hp applications
# Compensate for increased fuel pressure needed for high hp applications
# Increase ignition dwell time (turbo guys will like being able to open the plug gap back up some)
# Disable IAT compensation for dyno testing
# Turn your ECU into an ignition / fuel kill box for use with an air/co2 shifter
# Control a shift light, or any RPM based output using the stock flapper valve circuit
# Switch-able map selection for NOS, different turbo boost levels, fuel types etc
wow,you must be a senior member,you got to love the adjustabilty,that ecu hack members has developed,petrik,rr ect.
Can't wait until they break the Gen II ECU's.
The ecu hacking community still needs a 08 ecu to get the ball rolling!if you know of one i am interested,donations will be appreciated!obtw,a harness is also needed.
Suzuki didn't intend/design for it to be used with Nitrous. They set a soft limit so the rev limiter would be less abrupt when engaged compared to a full power cut. It makes for a smoother kill. Imagine hitting a hard limiter at high speed in a sweeping turn. Ouch!
Similar threads
