Fuel Injection Question..

[Pancakes]

Maybe they are smarter people, but there is no doubt that some smart people can obtain decent improvements with very little work.

No doubt about that, I just don't think this guy and his mate in the shed bending sensors are the other smart people your talking about and didn't want people to read that and think they'd make gains by fooling the sensors on their bikes.

Just in the process of tweaking the Fazer now. I have 10hp more out of it and know from others that it is easy enough to get another 10. Don't really need it but hey it's not hard to gut the cat and install smaller sub throttle plates.

Yeah people with experience will know what to do and how but that will vary vehicle to vehicle with the S200 being a good example because dozens of reputable tuners found that lots of mods will lose lots of power in these cars. I meant, a new turbo Falcon makes gains just by lifting the airbox but almost nothing with free'er pipes, if you do too much, gain more than 15% from memory and the computer uses the fly-by-wire throttle to lower the torque back to factory.

[imdying]

In their defence, fooling the sensors can potentially have a positive effect. It's just easy to make things worse instead.

[Pancakes]

In their defence, fooling the sensors can potentially have a positive effect. It's just easy to make things worse instead.

Yeah true, lots of simple fixes too if you know what your upto.

[imdying]

They worked better back in the day though, ECUs are getting a lot more sophisticated, and often can tell when you're messing with them

[bimotabob]

Hi

Adjusting the TPS to make the bike mixture change also may well change the ignition timing like on my system.
Alpha N systems often need remapping of the std fuel curve before mods are done anyway to get rid of dips etc.


Cheers

[stify]

a new turbo Falcon makes gains just by lifting the airbox but almost nothing with free'er pipes, if you do too much, gain more than 15% from memory and the computer uses the fly-by-wire throttle to lower the torque back to factory.

I see this kinda shit every day(foreman at ford dealership), the "big zorst goes faster" thing, that has got to be one of the worst mods on that car without doin some work to the wastegate.

my cbr600rr with only a pipe on it runs leaner than std, I have a k&n to fit but won't till I have a power commander or such like to compensate for the increased airflow

[delusionz]

Really? I thought it was common knowledge that messing with the exhaust throws out tuning. The very design that is supposed to line up exhaust pulses evenly so 1 sucks out the other.

[Pancakes]

Different with a turbo. Some think to use a tuned lengh runner is better some use a log manifold so it pulses more like a single cos aturbo doesn't spin according to the average gas flow it can be spun high by a pulse then carry enough inertia between pulses. Also, the computers messing your fun up aside the more pressure before the turbo and less after (pressure differential, BIG BORE zorst) the more boost can be passed to pressurase the intake and it will come on boost sooner too. So big bore and front mount (better cooling, again less pressure drop) are the two first points to address in a turbo car. All assuming the computer isn't going to see your tricks and limit power thru throttle control or retarding timing. Sorry, I'm writing fast, I wonder if this will make sense?

The Turbo Falcon computer (Black Oak, better than HAL 9000 I guess) is real smart and has multiple sensor cross referances on it's maps to find out if your cheating it.

[FROSTY:Me]

AND now we go back to the origonal question--why do you need to put it on a dyno.?
You put it on a dyno to quantify the changes.both made and possibly needed
It really is that simple.
Once you get into ram air you are into voodoo art -duplicating the ram air effect on a dyno --I don't know of anyone who is able to duplicate the ram air effect in a dyno room

[FROSTY:Me]

Really? I thought it was common knowledge that messing with the exhaust throws out tuning. The very design that is supposed to line up exhaust pulses evenly so 1 sucks out the other.

Unfortunately dude its er not that simple.
if exhaust systems were made JUST to get best performance then they would be made one way
They are made to pass noise emmission laws and gas emmission laws

[delusionz]

Unfortunately dude its er not that simple.
if exhaust systems were made JUST to get best performance then they would be made one way
They are made to pass noise emmission laws and gas emmission laws

It was a response to bigger is better. Is this what you're saying? If not, no need to argue.

Ofcourse they are also designed to pass noise and gas emission laws, I'm not oblivious to mufflers and catalytic converters...

[Pancakes]

It was a response to bigger is better. Is this what you're saying? If not, no need to argue.

Ofcourse they are also designed to pass noise and gas emission laws, I'm not oblivious to mufflers and catalytic converters...

Thats a kinda rude answer when it does seem you might not understand as much as you think you do delusionz.