Q:in engines otto cycle

All else being equal, larger valves equal less pumping loss and more top end horsepower. The problem with large valves is that at lower engine speeds, the gas velocity is too low to fill the chamber quickly and efficiently thereby compromising low-end torque. The answer to this dilemma is to have multiple small valves. This is the primary reason for current high performance engines being equipped with multiple valves per cylinder.

Q:Getting a piston for my yz and It says power valve must be modified for .040 or larger soo what does that mean and how do you do it.?

The power valve is the little metal flap that cover up part of the exhaust port while the engine is operating at low and mid RPM ranges. If you have bored the cylinder and the power valve is protruding into the cylinder, then you'll have to machine off the power valve or use a die grinder (dremel tool) to provide additional clearance. EDIT - If you're ordering the piston that is .040 oversize, then the power valve has to be modified. If you're ordering the .030 or smaller oversize, or the stock size, then no modification is needed.

Q:I play the trumpet and I took it home for Christmas Break. On Friday I am playing Amazing Grace at Church for New Years Eve, but the problem is my valves on my Trumpet is sticking and I don't have any valve oil for it. Is there any other oil that I can use for the Valves? It will be really great! Thanks :)

Pull it out and try saliva. Always worked for me

Q:i want to know where we must use swing check valve and where we must use lift check valve in petrochemical companies. what are the differences ? are they different from the appearance? how can we distinguish between them visually?

microscopic intervension

Q:I have my head off now I need to change my valves how do I do it?

It can be different from car to car, look up tutorial's on google and youtube for your specific car

Q:What's the safety valve (relief valve) type?

The four common types of pressure relief are the spring loaded valve, the rupture disc, the balance bellows spring loaded valve and the pilot operated relief valve.

Q:Hello, I have a 1990 BMW 525i.I would like to paint the valve cover where the BMW was written between a set of lines.I think I require a heat resitant paint for doing this.Can anyone advice the brand which will be best suited for this job.Is it advisable to chrome plate the valve cover.?with regards,natarajBahrain

If you want just flat black paint, grill paint works great and gives it that crinkled effect. You can get it at most hardware stores.

Q:How much will it cost to fix 5 broken gas valves out of 6 from my truck it's a Chevy s10 99'I live in North Carolina

The first step is to realize that you need a professional to work on your truck. This is good. By gas valves I assume you mean fuel injectors. But since you did not know that name it would appear as you have not had your truck properly diagnosed. Sounds like you're not getting fuel? spark? air? compression? in five cylinders in your 4.3-W six cylinder. Might want to find out why. Call around and ask whoever answers the phone if you can speak to an ASE Certified tech. If you talk to one then you have probably found a shop to which it would be worth taking the S10.

Q:To control a double solenoid valve, what do you recommend to use in my PLC program .... Do you recommend to use the SetReset coils or to use the normal coils?

Cheaper and more reliable to use simple coils...You probably need to add a large transistor between PLC and coil, with a bypass diode, unless your PLC output can sink a LOT of current.

Q:I have a 04 Ford Ranger 4.0L . some people are saying that headers may affect the EGR valves and might put up the check engine light on. is this true or not.

The headers shouldn't effect the valves but you will have to tighten the headers every day and you will be looking at alot of ehaust leaks from them.