I am new, and I got questions

[SaabJohan]

Originally Posted by Auto_newb

So then that means that if I didn't tell Honda to add something onto my car that I was buying from them, then after a year later, add it on. That would mean it is an aftermarket part?

So I got more questions:
What is a resonator?

How does atts work?

What is a "misfiring system"?

What is an engine overhaul?

What are custom forged pistons? (I always hear people say they want custom forged pistons)

If I use unleaded fuel, then use leaded, then my car fucks up , then if I go back to unleaded, how come it takes 15 minutes to start up and have so many problems after switching fuel?

Thank you in advance and for all the other questions that were answered

Misfiring system is another name on ALS, or anti lag system. Prevents turbocharger lag.

Engine overhaul - probably they mean to check the engine or do a simple service.

Custom forged pistons - forgings which have been machined to specific measurements specified by the customer. Piston manufacturers can even make a forging tool just for you but that will be expensive.

Custom forged Mahle piston with Pankl titanium rod for the Ferrari 049 formula one engine:
http://members.atlasf1.com/desmo/pistone.jpg
http://members.atlasf1.com/desmo/pistone2.jpg
The piston is made in 2618A aluminum alloy, but other aluminum alloys as well as AlMC and AlBe can be used. One of those pistons have a weight of around 250 g, which make them about half the weight of a "standard" piston with similar diameter.

Very few fuels are leaded, most "leaded" is only unleaded with a lead replacement like kalium. Kalium protects the valves from sticking and reduce wear on the carburetor needle (if the car has one). Lead, or tetra ethyl lead (TEL) was initially used to increase octane, today it's only used in a few countries (usually development countries) and in racing and aviation (piston engine) fuel.

[454Casull]

An anti-lag system is one that delays the firing of the spark plug when the throttle is released so that the stratified charge starts to burn on its way out of the exhaust ports, thereby keeping the turbines up to speed. I hear the turbos have to be replaced after every race, so don't try to install one for a streeting car.

[SaabJohan]

Originally Posted by 454Casull

An anti-lag system is one that delays the firing of the spark plug when the throttle is released so that the stratified charge starts to burn on its way out of the exhaust ports, thereby keeping the turbines up to speed. I hear the turbos have to be replaced after every race, so don't try to install one for a streeting car.

ALS can go active when you push the throttle or when the throttle is fully closed, systems used in WRC for example seems however to be a little more advanced. The anti-lag system does also provide air and fuel. ALS can be used on street cars without giving a too low turbo lifetime.

[Auto_newb]

Does an ALS inject fuel into the exhaust pipe and make an explosion to keep the turbines running? If so, how does it do it?

[454Casull]

Originally Posted by Auto_newb

Does an ALS inject fuel into the exhaust pipe and make an explosion to keep the turbines running? If so, how does it do it?

Did you read my post?

[Auto_newb]

Yeah sure, but I don't quite understand it. I'm gonna try to translate it and hopefully you can tell me whether I am right or not :-). Ok:


An anti-lag system is one that delays the firing of the spark plug when the throttle is released so that the stratified charge starts to burn on its way out of the exhaust ports, thereby keeping the turbines up to speed. I hear the turbos have to be replaced after every race, so don't try to install one for a streeting car.

Stratified = charged?

Delay the fire of the spark plug, meaning after the piston has been pushed to TDC, when the exhaust valve has opened up, so that the explosion spins the turbine and exit out of the exhaust pipe.

Is this right?

[Doug000]

Originally Posted by Auto_newb

If some engines have injectors directly inject fuel into the cylinder, wouldn't that mean that they wouldn't need an intake valve?

You still have to have in intake valve to let air in. A typical car has a thottle body of at least 500 cfm (cubic feet per minute). You could not possible get that much air into a cylinder through an injector.

[Auto_newb]

Yeah, I read on the other posts that fuel injection can only supply so much air

I am still quite unclear on what aftermarket means... Anyone care clear me up on this?

[Doug000]

Originally Posted by Auto_newb

Yeah, I read on the other posts that fuel injection can only supply so much air

I am still quite unclear on what aftermarket means... Anyone care clear me up on this?

Speaking generally, you have 2 types of parts for your car...original equipment manufacturer (OEM) and aftermarket. Some auto manufacturers make aftermarkets parts but for the most part, anything that is not made by the OEM is aftermarket. Some of the better known aftermaket companies are Flowmaster- exhaust systems; MDS- ignition systems; Accel- ignition and performance parts.

While some parts on every car do not bear the auto manufacturers name, they are original equipment, like spark plugs. (NGK on Hondas, AC Delco on GM, Motorcraft on Ford/Lincoln/Mercury). But Split Fire plugs are aftermarket...no manufacturers use these on the factory cars. Many times aftermarket are performance upgrade, appearance upgrades, or just generic versions on the original equipment version.

Does this clear this up any for you?

[Auto_newb]

Yeah it does, thanks

[Strider Negro]

i have a question
why is it that most people prefer naturally aspirating tuning than turbocharging tuning???
what are advantages and disadvantages to it?

[454Casull]

Originally Posted by Strider Negro

i have a question
why is it that most people prefer naturally aspirating tuning than turbocharging tuning???
what are advantages and disadvantages to it?

That depends. Some people like the instant (I mean really instant, not almost instant) torque from a standstill that N/A can give, whereas turboheads like knowing that they're extracting as much energy as possible from their fuel with turbos. Also, there's that lovely whine.

N/A setups are simpler.

[Strider Negro]

Originally Posted by 454Casull

That depends. Some people like the instant (I mean really instant, not almost instant) torque from a standstill that N/A can give, whereas turboheads like knowing that they're extracting as much energy as possible from their fuel with turbos. Also, there's that lovely whine.

N/A setups are simpler.

in what ways are they simpler??? don't cams and gaskets etc cost a lot of money??

[454Casull]

Originally Posted by Strider Negro

in what ways are they simpler??? don't cams and gaskets etc cost a lot of money??

Gaskets don't cost a lot of money, but even then, N/A cars don't require new cams or gaskets (well, gaskets are nice insurance for any kind of power increase, and cams can change the torque profile).

Neither do turboed/SCed engines, if the boost is low enough.

[badasspits]

i got oil in my intake i switch out the pcv valve and it still leaks oil what can i do to stop the leak.