You Can Be Too Rich! With add on Horsepower.................

[EngineMaster]

Silly me. For the longest time I thought “Stoichiometric” was the name of some hockey player from Quebec, or a small village in Russia. Well, it turns out stoichiometric is a really important automotive term having to do with air, fuel, and junk.
We all know that an engine needs to burn air and fuel to make power, right? Well, stoichiometric is the scientific term that indicates the ideal ratio of air and fuel for complete combustion (meaning no gasoline or oxygen is left in the combustion chamber). That stoichiometric air/fuel ratio is 14.7:1. When the ratio gets lower than that, the mixture is rich, meaning there’s a greater proportion of fuel.

When the ratio gets higher, you have a lean mixture and a greater proportion of oxygen. Normal, unmodified cars are set up to operate as close as possible to that stoichiometric ratio, since it delivers an optimal combination of fuel economy and low emissions while still producing adequate power. To maintain that ratio, the engine’s control unit depends on feedback from the oxygen sensor, which is mounted in the exhaust stream. The sensor monitors the amount of oxygen left in the exhaust gas and reports that back to the ECU. The ECU can then adjust the amount of fuel delivered to the combustion chamber to enrich or lean out the mixture as needed.

So, who cares about normal, unmodified cars, right? Not us. But air/fuel ratio is important in the quest for horsepower. A mixture that’s a little rich can help make power and keep the whole combustion process cooler. A mixture that’s too rich, though, just dirties engine parts with unburned gasoline. What’s more critical to watch for is the lean burn, especially with cars that are stuffing a whole bunch more air into the engine with a turbocharger or a supercharger. If you introduce a lot of air into an engine without also adding more fuel, you will blow up the motor in no time.


There are many products on the market that monitor air/fuel ratio. Most hook up to your car’s stock oxygen sensor and use the sensor’s voltage signal to light up LEDs or bar graphs to indicate when the ratio is running rich or lean. The Wideband Oxygen Sensor Controller from FJO Enterprises is more sophisticated than that. For one thing, it monitors the air/fuel ratio with a dedicated oxygen sensor that has a sensitivity range greater than most units. It can read ratios from 10:1 to 20:1. The FJO system also gives you several options for monitoring the ratio, from a straightforward display box you can mount on your dashboard to the ability to map the ratio in real time on a computer or a PDA. And unlike a line of LEDs or a bar graph, the FJO Controller gives you the actual air/fuel ratio number as the sensor is reading it, so when it changes you know exactly by how much.

One thing the FJO Controller won’t do is control or alter the air/fuel ratio. It is a diagnostic tool only, to be used to check the ratio when you’ve made mods or are tuning for competition. You’ll still need to reprogram the fuel and ignition maps separately. But the Controller will give you peace of mind—or a clear warning—after you’ve installed a turbo and you stab the throttle for the first time.

[arnab]

havent fiddled with the air/fuel ration in my cars, but i know that i've done some trial and errors with my bike.. its fitted with a Power Commander module which can be programmed with a fuel/air ratio map...it makes a huge difference.....should also make some difference in a car, the best option is to add a "supercharger". now were talking some real horsepower..

cheers

[sakin_uttara]

Hi............... I need to get more horses in ma carburator engine of ma ae 80....... though it has a engine of AE80 corolla GTS........ and delivers 112hp with top speed of 135 km/h with speed limiter on............ Oh yes.. . HOW CAN I REMOVE SPEED LIMITER................... In High way specialy on CTG 2 C'bazar highway....... it's impossible for any one to OVERTAKE...............

PEACE[/u][/i]

[auto_freak]

well, is it a 1980 model coz then I dunno any1 in bd who can remove the speed limiter or your ride. But if its a 90-00 modeled car, then Badal Bhai at Bangla motor can help you. Let me know asap.

[chittaGoNgz_FyNeSt]

nos had this device which removes speed limiter ..it costs around 8 or 9000 bukz

Hi............... I need to get more horses in ma carburator engine of ma ae 80....... though it has a engine of AE80 corolla GTS........ and delivers 112hp with top speed of 135 km/h with speed limiter on............ Oh yes.. . HOW CAN I REMOVE SPEED LIMITER................... In High way specialy on CTG 2 C'bazar highway....... it's impossible for any one to OVERTAKE...............

PEACE[/u][/i]

[shamsshahriyar]

whats wid nos if u use it ur gonna blow up i m sure.......and ya its hard to overtake as the roads r narrow---in sum places u can but u betta watch out other vehicles cumin from the curves....buit i m sure u can overtake

[chittaGoNgz_FyNeSt]

whats wid nos if u use it ur gonna blow up i m sure.......and ya its hard to overtake as the roads r narrow---in sum places u can but u betta watch out other vehicles cumin from the curves....buit i m sure u can overtake

im tokin about NOS da shop in da dhk ..dumb ****

[rawfin]

Guys Please,Watch the language. Shams,Read the posts carefully.

[shamsshahriyar]

soory SAMAR man -- samar bro shud have written in brackets bout the shop neways--what will dat speed limiter do

[rawfin]

soory SAMAR man -- samar bro shud have written in brackets bout the shop neways--what will dat speed limiter do

It will simply remove the limiter. :blue_idea;

[shamsshahriyar]

SIMPLY Dint get you---it will remove the speed limiter?? DOnt kno what is it?? PLz explain in a New Topic :offtopic: