Well just as the title says dont know if it chat or advanced, i though advanced.
Well? What makes an engine a stroker? Just making your pistons larger ? Im thinking about getting a junkyard 4.0 and rebuilding it for when my takes a crap but i wanna get POWER! Just let me know what i will need and such.

A longer piston stroke. And I'm sure more things.

Sent from my mind using the rusty stock leafs off my xj.

Longer crank stroke. Usually the wrist pin hole in the piston is much higher up on the piston to compensate for the longer stroke. If you build it right you can get the piston "0 deck" which means the piston is very close to the top of the block. Raises compression without consequences. Usually you have to deck or mill off material from the top of the block to do that. This longer stroke makes a larger space for air to fill up which is increased cubic inches. Remember the engine is not an air pump like people think. When the piston goes down it creates a vacuum (scientific definition.... basically a 0pressure space. Not a hoover) And the pressure from the atmosphere pushes air in when the intake valve opens. The displacement, say 350 cubic inches, is how much air can fit in the space between the piston and the top of the combustion chamber when the piston is at the bottom of its stroke (in an ideal situation.) This is why people need freer flowing Intakes, bigger valves and ported heads to make power. It allows more air to be pushed in by the atmosphere for the short time the.intake value is open. Supercharger work by increasing pressure above 1 bar (14.7 psi atmospheric pressure) forcing more air into the chamber. I have more info if you want lol.... stop me or ill keep going :-)

I want more.......

Sent from my mind using the rusty stock leafs off my xj.

What would you like to know??

Idk. But you were on a roll with that and I like learning about engines.

Sent from my mind using the rusty stock leafs off my xj.

I agree... More lol

Well.... ill go with detonation. It is also known as preignition or pinging because the mixture combusts before the plug fires or just too early in the up stroke.... This beats up piston because they are still on their upstroke and the.explosion is tying to push down. It is caused by either heat and pressure and or Sharp corners in the combustion chamber as well as too much timing (plug firing toooo early) sharp corners create hot spots which can act kind of like a glow plug in a diesel. Gasoline in a gaseous form is very volatile. When you add pressure it becomes downright explosive. In he old days after leaded fuel and before computer designed engines came out he compression ratios of cars went way down partially due to the problem with detonation. Leaded fuels were very high octane by nature and kept muscle cars with ultra high compression from detonation. These days with computer controlled machine processes the quality control as well as modern fuel injection valve timing and computer controlled ignition and the way things can be.machined has improved to the point that 10:1 or even 11 or 12:1 on factory cars has become the norm. Lesson.... domt buy high octane gas for your jeep. It doesn't need it and will not burn completely and will actually drop your HP. Some newer cars require ONLY 87 OCTANE. The computers are very sensitive and they will not run right without he correct octane. If you.have pinging problems in your jeep it is due to mechanical problems or carbon buildup in the combustion chamber (actually increases compression because it takes up chamber space) qnd you need to take.a.deeper look at your engine.

Alright so how do you get your specific "Litre/Liter" for your stroker? How hard is this to do ? Ive tore an engine down before and put it back together. Helping my grandpa put back together a 327, dome pistons etc. And keep going

On the diesel thing. Diesel is very very slow burning making it very high octane. Diesel engines run extremely high compression ratios and use.glow plugs that as the name implies are very hot and glow continuously. They do not fire like a spark plug. Because of this you can't just turn the ignition off and kill a diesel. After he plugs hot and its running combustion will keep the plug hot. Lu have to cut the.fuel to turn it off. This brings me to what dieseling is in gas vehicles. Dieseling in gas vehicles is.when you turn off the key and the engine continues to run. Usually caused by excessive carbon build up or physically damaged parts in the combustion chamber.

Same thing. It is a conversion. Litres is a measure of volume. And oh Jeeze let me pull out my geometry book. You have to find the volume of the cylinder from the top of the flat portion (not the dome) of the piston to the top of the block when the piston is at the bottom of the stroke then cc the combustion chamber (a way of measuring the volume using water) and add that to the volume of the cylinder, then subtract the volume displaced by the dome (since its taking up space in the cylinder). Technically you should add the volume of the compressed thickness of the cylinder hole in head gasket as well (I can't remember but I think 2pi r h) but that's going a little far. Anyhow after you het the volume for one cylinder multiply that times the number of cylinders and viola.

Keep em comin lol

Why do you have to be so smart?

Sent from my mind using the rusty stock leafs off my xj.

Well............. haha jk. I have a very mechanical mind and a voracious appetite for anything automotive. I studied.engineering, never finished. Electronics and circuits, never finished (wish I.could remember. I.need a review before i make an.*** of myself.) And became a Machinist. Planning on going back and finishing my engineering degree. Unfortunately i drank hard for about 7 years so I kinda screwed a lot of opportunity off. I'm back on the straight and narrow now and trying.to jog my memory.

Area of a circle is pi multiplied by the radius squared. This means volumetric measurement of a cylinder is pi*radius squared*height (distance travelled by piston). The easiest way to stroke out a 242 inline six is to take the crank and connecting rods out of an old AMC 282 (I think) straight six and throw them in the 4.0. After that, you'd get 4.5 liters of displacement. If you were to use the pistons also, you could bore the cylinders in a 4.0 block thirty-thousandths of an inch over normal size and you'd have a 4.7 liter stroker.