http://www.speedydelivery.co.uk/car-tuning-power/vauxhall-corsa.shtml
Do these things actaully work...or are they just a joke? If they do work what kinda difference do they make?
Not a Joke but if you even think about putting one on its worth a few slaps around the face with a nice piece of trout...
You need a vortex valve (http://www.vortexvalve.com/) instead.
(http://www.vortexvalve.com/images/art/mark_weida.gif)
Quote from: Poison_UKNot a Joke but if you even think about putting one on its worth a few slaps around the face with a nice piece of trout...
?
They just fool the ECU into thinking theres more airflow than there actually is. The engine then bungs more fuel in the cylinders, and so effectively youre running a richer mixture. Which may net you a tad more power but really isnt too great for the car. And your fuel economy suffers to boot.
Quote from: funkychicken9000They just fool the ECU into thinking theres more airflow than there actually is. The engine then bungs more fuel in the cylinders, and so effectively youre running a richer mixture. Which may net you a tad more power but really isnt too great for the car. And your fuel economy suffers to boot.
How much is a tad?
If you get the one with the var resistor...what would you estimate the delay between adjusting the control and the car being more powerful be? I can see it could have its uses every now and again...and when you dont need the extra juice it can run normally...a bit like the M button in the BMW M5?
the M button in the M5 is a bit more advanced i think, like it changes the cam timings and raises the rev limiter
those resistors are a f**king bag of wank
Quote from: DeltaZeroQuote from: funkychicken9000They just fool the ECU into thinking theres more airflow than there actually is. The engine then bungs more fuel in the cylinders, and so effectively youre running a richer mixture. Which may net you a tad more power but really isnt too great for the car. And your fuel economy suffers to boot.
How much is a tad?
If you get the one with the var resistor...what would you estimate the delay between adjusting the control and the car being more powerful be? I can see it could have its uses every now and again...and when you dont need the extra juice it can run normally...a bit like the M button in the BMW M5?
I would guess at power increase being somewhere in the region of f*** all. And it would sh*t on your catalyst as youd have lots and lots of unburned fuel pissing out the back. As for delay, there wouldnt be one as any sensible ECU would monitor airflow in realtime.
It doesnt take much knowledge of thermodynamics to realise that anyone who does this is a retard. The ECU is programmed the way it is for a reason, not because car companies feel stingy.
I expected responses like this....just making sure!
Surely itd also cause knocking in the engine...
With the spark firing sooner in the cycle, meaning that the piston isnt fully compressed at firing??
Or do I have the wrong idea about knocking??
all these will do with putting more fuel into the cylinder without doing any other "proper" mods is wash the lubriation out of the cylinder over time. The old one with pulling the choke out on the 1.0L metro made it go faster, but it siezed the engine after a while.
Ill sell ya some Manifold Magnets for only 69.99. Guaranteed to allow for tighter air molecule alignment! :lol:
Quote from: M3ta7h3adSurely itd also cause knocking in the engine...
With the spark firing sooner in the cycle, meaning that the piston isnt fully compressed at firing??
Or do I have the wrong idea about knocking??
They dont alter timing in the slightest on the majority of cars Id imagine. I doubt it would pink either.
fair nuff.
Quote from: funkychicken9000Quote from: M3ta7h3adSurely itd also cause knocking in the engine...
With the spark firing sooner in the cycle, meaning that the piston isnt fully compressed at firing??
Or do I have the wrong idea about knocking??
They dont alter timing in the slightest on the majority of cars Id imagine. I doubt it would pink either.
The nearest thing would be pulling the choke out slightly on an older car.
yup - youre just gently flooding the engine - the short answer to all questions is no.
Quote from: funkychicken9000Quote from: M3ta7h3adSurely itd also cause knocking in the engine...
With the spark firing sooner in the cycle, meaning that the piston isnt fully compressed at firing??
Or do I have the wrong idea about knocking??
They dont alter timing in the slightest on the majority of cars Id imagine. I doubt it would pink either.
The ignition map is usually a good bit different in the maps on the likes of superchips/starchips - they arent worth a ball of sh*te though - they dont make any good difference, and they arent set up for that car - theyre a best guess map on one that was used as a reference - probably a brand new or low miler.
Since that is a piggyback device Im guessing that it modifies the output to the injectors, and could also modify the ignition output - still not worth a ball of sh*te though.
On Turbod cars all they do is basically increase the pressure at which the wastegate opens, thereby lessening the life of your engine, and turbo. Bleed valves also have the same effect - you end up with a dead turbo a lot more quickly (Ive seen one wreck a turbo in a week)
Quote from: BXGTi16VThe ignition map is usually a good bit different in the maps on the likes of superchips/starchips - they arent worth a ball of sh*te though - they dont make any good difference, and they arent set up for that car - theyre a best guess map on one that was used as a reference - probably a brand new or low miler.
Since that is a piggyback device Im guessing that it modifies the output to the injectors, and could also modify the ignition output - still not worth a ball of sh*te though.
On Turbod cars all they do is basically increase the pressure at which the wastegate opens, thereby lessening the life of your engine, and turbo. Bleed valves also have the same effect - you end up with a dead turbo a lot more quickly (Ive seen one wreck a turbo in a week)
Read between the lines mate. It isnt a piggyback chip, its a f***ing resistor you wire in between the air mass flow sensor and the ECU :D
If you know the resistance then it should cost a few pence, a pound at most.
ack nooo I just saw "tuning" and "vauxhall corsa" in the same URL
suffice to say, I didnt let the page load.... its wrong I tell thee.. WRONG!!!! WROONNGGGG!!!
:lol:
Quote from: SeriousIf you know the resistance then it should cost a few pence, a pound at most.
"If you know the resistance"... Are you implying that there is some specific resistance that somehow makes the car into a porsche-thrashing beast?
Quote from: funkychicken9000Quote from: SeriousIf you know the resistance then it should cost a few pence, a pound at most.
"If you know the resistance"... Are you implying that there is some specific resistance that somehow makes the car into a porsche-thrashing beast?
No, Im implying that they are greedy thieving b*stards. If you know the stats of the variable resistor then you should be able to buy the bits for a quid.
Note I still havent said its going to work and refer to my second previous post above
Quote from: SeriousThe nearest thing would be pulling the choke out slightly on an older car.
You might get a slight performance gain but at the expense of a lot more fuel.
Quote from: snellgroveack nooo I just saw "tuning" and "vauxhall corsa" in the same URL
How do you double the value of a corsa?
Fill the petrol tank.
Quote from: SeriousYou might get a slight performance gain but at the expense of a lot more fuel.
When I were a nipper... first getting into cars, I thought that when an engine was tuned it was made... more efficient, better... it produced more power, due to being ..well, tuned.. in the musical sense of the word I guess...
but the reality is, engines are absolutely crap at what they do, and all performance gains come at an expensive of a lot more fuel. Your tuned up engine (just for arguments sake, take a Skyline) turbocharged engine will damn well guzzle the stuff like no tomorrow even in standard trim (~280bhp from its 6-cyl 2.6 - proper stuff!)
tuning isnt tuning.... its just squeezing as much air into the engine with the correct fueling (stopping it from being lean, or rich) and ignition timings (to prevent pre-detonation as much as possible) and then its down to hoping the block doesnt go crack into lots of pieces under the strain :D
If I can find it, I have pictures on another forum Im a member of with a 1000+ BHP golf engine ....in two halves :lol: block quite cleanly snapped into two under the stress!!!