I am new, and I got questions

[SaabJohan]

Originally Posted by Neutrino

ok this might sound stupid but what about having the injectors push in both fuel and air like in the case of direct port nitrous were they inject both nitrous and fuel

and if you can combine this with direct injection you would not even need intake valves

This would be difficult to make, and I also don't see any advantages with it. However, air can be injected with the fuel in some amount. Diesel engines can inject compressed air with the fuel to help it vaporise. Gasoline engines can have a small air feeding hole from the runner to the injector, this will also help vaporisation.

[Sluttypatton]

Also, it would be extremely difficult to find injectors that would be able to flow enough air to meet an engines needs. Lets say that the most an injector can flow is 20000ccm of air (I've researched high flow injectors). A 2.0L engine can theoretically use 13104000cc's of air @7000RPM (in a stoic mixture), 20000cc's becomes less than .2% of the total gaseous content. If we had one air injector per cylinder ( 4 cyl.)we would only be feeding the motor .8% of the air it needs to run. At this time, there isn't an injector in the world that can flow the quantities of air needed.

[Auto_newb]

Originally Posted by Sluttypatton

And to clarify a final drive ratio, the transmission is simply a unit consisting of a number of gear ratios, after the transmission, the power goes through a differential, which is a last set of gears, with the purpose of sending the power to the wheels. The ratio of the big gear to the little gear in the differential is the final drive ratio (because it is the "final" gear ratio in the "drive"line). So if a car has a final drive ratio of 4.09 (the UK Kas with power steering do) it means that the final gear set that the power goes through before hitting the wheels has 4.09 teeth on the big gear to every 1 tooth on the small gear. I hope that clears some things up.

When you mean the "small" gear and the "big" gear, are you talking about the input pinion (small) and the ring gear (big)?

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

[454Casull]

Originally Posted by Sluttypatton

Yeah, I had heard of that, but last I heard it was still under development. So I opted to keep it simple as to not overload him and just confuse him. Almost no motors use direct injection, and none of the few that do, are on the road as daily drivers. I think, for now, direct injection is purely in the research stages.

You're forgetting diesels...

[454Casull]

Originally Posted by Auto_newb

When you mean the "small" gear and the "big" gear, are you talking about the input pinion (small) and the ring gear (big)?

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

Yes to the first question.

No. The air still needs to come from somewhere, and as such, the burning mixture can't go back that way.

[Auto_newb]

So are you saying that gasoline comes from the Fuel injectors, but the air comes from the intake valve? But I thought the fuel injector was to replace the carburetor, which it's job is to control the amount of air AND gasoline. At least that's what I heard

Anyway, I got more questions (being an car newbie):

What does Aftermarket mean?

What is an engine overhaul?

Do better spark plugs and valves increase an engine's performance?

Does VTEC only control how much the valve opens up and when it opens up? Maybe just the first one, or just the second one?

The oil pan is RIGHT under the crankshaft right? How does the oil get to so many places in a car?

How does a double wishbone suspension work? (Sorry about this one, I know what they look like but I don't know how they work)

[Neutrino]

Originally Posted by Sluttypatton

Also, it would be extremely difficult to find injectors that would be able to flow enough air to meet an engines needs. Lets say that the most an injector can flow is 20000ccm of air (I've researched high flow injectors). A 2.0L engine can theoretically use 13104000cc's of air @7000RPM (in a stoic mixture), 20000cc's becomes less than .2% of the total gaseous content. If we had one air injector per cylinder ( 4 cyl.)we would only be feeding the motor .8% of the air it needs to run. At this time, there isn't an injector in the world that can flow the quantities of air needed.

I was actually thinking of the same problem....oh and i just realised there would be another problem.....such and injector would highly presurise the air and threfore raising its temperature


but hey my idea came arout 3 am when my brain is not very active

[ivymike1031]

Originally Posted by Neutrino

ok this might sound stupid but what about having the injectors push in both fuel and air like in the case of direct port nitrous were they inject both nitrous and fuel

and if you can combine this with direct injection you would not even need intake valves

http://www.orbeng.com.au/orbital/orb...owpressure.htm

[Neutrino]

Originally Posted by ivymike1031

http://www.orbeng.com.au/orbital/orb...owpressure.htm

thanks for the link...i especially like how this sys atomizes the mixture so you can get a better and more efficient explosion

[SaabJohan]

Originally Posted by Auto_newb

So are you saying that gasoline comes from the Fuel injectors, but the air comes from the intake valve? But I thought the fuel injector was to replace the carburetor, which it's job is to control the amount of air AND gasoline. At least that's what I heard

Anyway, I got more questions (being an car newbie):

What does Aftermarket mean?

What is an engine overhaul?

Do better spark plugs and valves increase an engine's performance?

Does VTEC only control how much the valve opens up and when it opens up? Maybe just the first one, or just the second one?

The oil pan is RIGHT under the crankshaft right? How does the oil get to so many places in a car?

How does a double wishbone suspension work? (Sorry about this one, I know what they look like but I don't know how they work)

The fuel injectors only control the fuel, the air is controlled by the throttle valve which is usually one or more butterfly valves placed before the intake plenum or in the runners. Look at the picture of the Ferrari F1 (link above) engine and you can se the throttle valves in the intake runners.

Aftermarket = stuff you can buy for your car that aren't orginal.

Yes, better sparkplugs and valves can increase the performance of an engine. The cylinder head, including valves, lifters, springs and camshafts, is usually the most important part when it comes to high performance engines.

VTEC uses a separate lobe for high speed, it will change lift and duration. See the thread about VTEC.

The engine oil stays in the engine, the gearbox for example has its own lubrication. The engine has a oilpump that pumps the oil from the sump through a oilsystem that goes to all the important parts, it is also used to cool the engine. Some racing engines are using dry sump lubrication, then the oil is pumped from the crankcase (with a vacuum pump) to a tank, and then the pressure pump takes over (the oil can also be pumped directly to the pressure pump from the vacuum pump).

With a double wishbone suspension allows each wheel to move freely independent on the other wheels. The geometry also change when the wheels are pushed in, this will get better grip in corners. How it works isn't that hard to figure out when one looks at the pictures.
Both the wishbones, or A-arms are mounted on the chassi but can move up and down, on standard cars they are usually mounted in bushings while racing cars use ball links. In the A-arms the wheel hubs are mounted, on the hub the steering linkage/toe adjustment rods are mounted. A damper or pushrod is mounted on the A-arms (upper or lower) and goes to the chassi or in the case of a pushrod; to the damper which is placed on the chassi.

[Auto_newb]

Ok thank you for your replies everyone.

I will see the VTEC thread for more information. But I got one more question, are you saying that aftermarket parts are parts that are NOT made by a company but are made by someother people?

[Sluttypatton]

So, Ivymike, that link is about a supplementary system right? The motor its self still has intake valves but the injectors supplement them and help to atomize the fuel. I had already been thinking about an air injection system to supplement the motors air flow for performance applications, but when I realized how little air one could inject I gave up. I never thought about using the injected air to improve fuel atomization.

Anyways, there are a couple of threads about that exact thing, that were started quite a while ago.
Link
Link

Auto newb, aftermarket parts can be made by the OEM (original equipment manufacturer) or any other company. Aftermarket simply means a part that was not on your car when it came out of the factory. Some car manufacturers offer large lineups of aftermarket parts (Mopar for example).

[Auto_newb]

Originally Posted by Sluttypatton

So, Ivymike, that link is about a supplementary system right? The motor its self still has intake valves but the injectors supplement them and help to atomize the fuel. I had already been thinking about an air injection system to supplement the motors air flow for performance applications, but when I realized how little air one could inject I gave up. I never thought about using the injected air to improve fuel atomization.

Anyways, there are a couple of threads about that exact thing, that were started quite a while ago.
Link
Link

Auto newb, aftermarket parts can be made by the OEM (original equipment manufacturer) or any other company. Aftermarket simply means a part that was not on your car when it came out of the factory. Some car manufacturers offer large lineups of aftermarket parts (Mopar for example).

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

[Auto_newb]

...Anyone?

[ivymike1031]

[quote=Sluttypatton]So, Ivymike, that link is about a supplementary system right? The motor its self still has intake valves but the injectors supplement them and help to atomize the fuel. I had already been thinking about an air injection system to supplement the motors air flow for performance applications, but when I realized how little air one could inject I gave up. I never thought about using the injected air to improve fuel atomization.
QUOTE]

Yeah, the air assist is just to help get the fuel where it needs to be. The engine still has a conventional air induction system, perhaps minus the throttle.