Hi there, i have been learning in auto class that if you take out the jets of a older car that has a carburator you can put in bigger ones that will pump more fuel in the engine = more hp. Wondering wut size stock jets are for a 86 300E 3.0 Ml03 and if they have any other bigger ones i could try this little mod out? how much? do they even exist? thanks!

You better look again. Your car maybe fuel injected. In which case you will have to figure how to change the control pressure to get more fuel, but that is metered by airflow, so you will have to get more airflow into the engine to make HP.

Yea man, sorry to break it to you, your car is fuel injected, not carburated.

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George Carstens

uh.. under the air filter isn't that the carburator or throttle body ;(

Thats the air meter. It tells the engine how much fuel the engine needs under certain airflow conditions. Under the air meter is the throttle body.

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George Carstens

any way i could get my air meter to tell the engine to put more fuel in? so i can sorta do the same mod as a bigger jet?

On the top of the air fuel meter there is a place to stick an allen key in. If you turn that...in one direction, it richens the mixture, if you turn it the other way, it leans the mixture out. Do a search. I forgot which way is which but this has been discussed before.

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George Carstens

You need to talk to the shop instructor about this. The reasoning you are using for increasing performance is flawed. Increasing only the fuel into the engine won't neccesarily increase horsepower, it will definitely richen the mixture (more fuel in the intake mixture) but increased performance is not a guarantee of doing this. If you can increase BOTH fuel AND air into the engine, such as altering the bore or stroke of the cylinders, then you increase performance, or by altering the compression ratio, or by supercharging the engine, for example (forced air induction). It's not as simple as getting more fuel to go in, you can decrease performance this way. Study the subject matter before attempting anything, and leave that adjsuter alone on top of the throttle body, you can end up with an engine that won't even run.

Gilly