Bazzaz Z-Bomb Timing Retard Calibrator

[aniladitya]

Hello Barf,

I came across this product and Bazzaz says it will increase the horsepower. How? What does a retard calibrator do? Any information is appreciated.

Cheers!

 

[Phanuel]

From googling; The 09+ ecu's retard the ignition over about 12k rpm for emissions purposes. I believe it cuts the power by 15%. I've been told that the Z-Bomb tricks the ECU into thinking it doesn't need to retard the ignition, making it the same as the 07-08.

So if you're spending time above 12k rpm in 5th and 6th, yes.

 

[whitelotus]

It calibrates your retard, duh.

 

[El Feo]

From googling; The 09+ ecu's retard the ignition over about 12k rpm for emissions purposes. I believe it cuts the power by 15%. I've been told that the Z-Bomb tricks the ECU into thinking it doesn't need to retard the ignition, making it the same as the 07-08.

So if you're spending time above 12k rpm in 5th and 6th, yes.

That's what Bazzaz wants you to think that's what it does. But, you can't change the timing via the Throttle Position Sensor. The Honda model does not change the timing at all.

All it does is change the resistance of the TPS (the TPS is just a potentiometer or rheostat). This richens the map by increasing the pulse width. Bazzaz says that it only occurs "10.5k to 15k" range, but this is also bullshit. The TPS has no idea what the how fast the engine is turning.

You can achieve the same thing as the Z-bomb by loosening the TPS screws and turning it counter-clockwise a smidge. Boom, free horse power.

The Suzuki model, OTOH, is simply a TRE (timing retard eliminator). It tricks the ECU into thinking it's in a higher gear.

It calibrates your retard, duh.

:laughing This is actually more accurate.

 

[aniladitya]

Thanks for the replies.

That's what Bazzaz wants you to think that's what it does. But, you can't change the timing via the Throttle Position Sensor. The Honda model does not change the timing at all.

All it does is change the resistance of the TPS (the TPS is just a potentiometer or rheostat). This richens the map by increasing the pulse width. Bazzaz says that it only occurs "10.5k to 15k" range, but this is also bullshit. The TPS has no idea what the how fast the engine is turning.

You can achieve the same thing as the Z-bomb by loosening the TPS screws and turning it counter-clockwise a smidge. Boom, free horse power.

The Suzuki model, OTOH, is simply a TRE (timing retard eliminator). It tricks the ECU into thinking it's in a higher gear.

If i understand the above quote correctly, Z bomb richens the AFM map. Does it richen it through out the rpm range?

 

[El Feo]

If i understand the above quote correctly, Z bomb richens the AFM map. Does it richen it through out the rpm range?

Yes.

I like the instructions though. First, they say "it will lean out slightly." Then on page 3: "+5 % of additional fuel in the 80-100% TPS and 10,500-15,000 RPM range."

I think they need to calibrate the Bazzaz retards because they're pretty dishonest.

 

[stangmx13]

El Feo, i think u are incorrect on most points about the ZBomb.

advancing the ignition timing will cause the AFR to go a tiny bit lean without any FI changes

the ZBomb does not richen the FI map throughout the RPM range, and esp not for all throttle openings. my dyno tuner confirmed this way back.

the ECU knows the TPS reading and adjusts the ignition timing based on that. it contains a timing map that is RPM vs TPS -> Timing.

im reasonably sure that the ZBomb is NOT a constant resistor. i have one in the garage so maybe ill have time to confirm later.

 

[El Feo]

the ECU knows the TPS reading and adjusts the ignition timing based on that. it contains a timing map that is RPM vs TPS -> Timing.

Oh, I see what you're saying! Sure, if you trick the ECU into thinking it's WOT, that will certainly advance the timing. However, now you're running rich. I guess you fix that the main Bazzaz module.

the ZBomb does not richen the FI map throughout the RPM range, and esp not for all throttle openings. my dyno tuner confirmed this way back.

No, not for all throttle openings. However, TPS info is independent of RPM.
So, Z-bomb could theoretically change it's series resistance as a function of throttle position, however, it's impossible to change it via RPM.

However, I don't have one. So, there's that.

im reasonably sure that the ZBomb is NOT a constant resistor. i have one in the garage so maybe ill have time to confirm later.

Naw, I'm guessing it's an active circuit with a voltage arbiter. Meaning once the Zbomb reads say 3 volts, it adds an addition DC offset like .2 volts to trick the ECU into thinking the throttle is open wider than actual.

Let us know what you find out though!

 

[aniladitya]

Robert - If i just buy Z bomb and plug into my stock bike, will there be an increase in horsepower?

 

[stangmx13]

Naw, I'm guessing it's an active circuit with a voltage arbiter. Meaning once the Zbomb reads say 3 volts, it adds an addition DC offset like .2 volts to trick the ECU into thinking the throttle is open wider than actual.

Let us know what you find out though!

c thats the thing, there shouldnt be a "wider". the max voltage reading is the reference voltage, which should be ~5V. the ECU shouldnt really care about a greater voltage. 110% throttle should not exist. i dont think thats how the device works.

Robert - If i just buy Z bomb and plug into my stock bike, will there be an increase in horsepower?

at 100% throttle, yes. at all other throttle positions, no.

 

[El Feo]

c thats the thing, there shouldnt be a "wider". the max voltage reading is the reference voltage, which should be ~5V. the ECU shouldnt really care about a greater voltage. 110% throttle should not exist. i dont think thats how the device works.

My description was overly heuristic. It's a voltage divider. So, it's either going to introduce an additional series resistance everywhere as in a passive device. Or, it's going to an additional series resistance after a certain voltage in an active device. (Which is what I described.) Of course it can't go over the reference voltage.

at 100% throttle, yes. at all other throttle positions, no.

Only on certain CBR600rr years ('09-'11), no?

 

[stangmx13]

09-12