Stroker

[SilverStang305]

was up ive been going around the forums and stuff and i found a couple of people mentioning how if his chevy had a 462 stroker (for example) it would have around 600hp can some one tell me what they meen by 462 stroker what is that ?

[bluevp00]

A stroker kit, in the simplest sense, increases the displacement of the engine. It's an entire engine rebuild kit, bigger pistons, longer rods, revised crankshaft. If you wanted a stroker kit for your mustang, you could build it from 4.6L to maybe 5.0 or 5.2L, but it wouldn't get you 600 HP - the only way to get that much power is with a supercharger added to it.

[curtis73]

A stroker kit gets its name from the fact that it increases the stroke of the crankshaft. The throws of the crankshaft are further away from the centerline, meaning that the difference between the uppermost travel of the piston and its lowest point has been increased, therefore increasing engine displacement.

[TheSilentChamber]

Originally Posted by bluevp00

A stroker kit, in the simplest sense, increases the displacement of the engine. It's an entire engine rebuild kit, bigger pistons, longer rods, revised crankshaft. If you wanted a stroker kit for your mustang, you could build it from 4.6L to maybe 5.0 or 5.2L, but it wouldn't get you 600 HP - the only way to get that much power is with a supercharger added to it.

Not nessassarly longer rods and bigger pistons.

[SilverStang305]

so pretty much a stoker kit is a whole bunch of diffrent parts for the engine that replace the factory parts giving it more hp due to the new racing performance pieces or whatever u wanna call em

[UncleBob]

not necessarily. It really depends on the the kit and the engine in question. The bare bones of it is either an aftermarket crank or sending in your stock crank to be modified....and either pistons that compensate for the change, or con rods that compensate. Depending on the engine and the amount of stroking, you might have to modify the block too to clear the added throw of the crank/con rods.

If its the only modification you make, it will mainly give you more lower RPM torque. To fully take advantage of it and get the best peak HP capability from the modification, you really need to invest in head work and cams, and all the other goodies that can go along with that.

Displacement isn't the only part of the equation for HP, a very important HP formula, for example, is cubic inch of engine per valve area. Having a huge displacement engine with tiny little valves in the head will not get you much HP.

But as always, if you want to tell us what engine we're discussing, we could get more detailed if you like.

[curtis73]

Not to put too fine a point on it... but it sounds like you could use a quick catch up... try this link http://auto.howstuffworks.com/engine.htm

On that page you'll find a little selection box of things that should keep you occupied. An engine's displacement is simply the amount of volume it displaces. Its a piston in a cylinder moving up and down. The area of the cylinder times the length of the stroke is the displacement. If you have an engine where each cylinder displaces half a liter and there are 8 cylinders, its a 4.0 liter engine.

If you increase the size of the cylinder, or increase the length of the stroke, you are increasing the displacement of the engine. For instance, if you increase the stroke of the above example by 10%, you now have a 4.4 liter engine.

Read up on how the guts of an engine work at that link and I think you'll understand a bit better.