Question about stroker engines - The 1947 - Present Chevrolet & GMC Truck Message Board Network

R@nger · 06-03-2005, 09:53 PM

I've been seeing alot of "Stroker" engine threads lately. Honestly I have not a clue what qualifies an engine as a "stroker"...could someone please explain this to me.

Thanks

pissonNOS · 06-03-2005, 09:58 PM

it has to do with the stroke you piston travels. attained by a new crank shaft. someone please correct me or add to this if im wrong

Mongo · 06-03-2005, 10:15 PM

Quote:

Originally Posted by pissonNOS

it has to do with the stroke you piston travels. attained by a new crank shaft. someone please correct me or add to this if im wrong

or is it longer arms with shorter pistons. Now I am confused

Beast388 · 06-03-2005, 10:25 PM

The term generally refers to engines that have strokes longer than originally equipped. For example, the 388 in my Burb. Originally, it was a 350 with a 3.48" stroke. I rebuilt the engine and used a different crankshaft that had a 3.75" stroke. Generally new pistons are required as well.

Longhorn Man · 06-03-2005, 10:32 PM

Adding stroke...that defines stroker.
Many common ones, 383 being top of the list. (for chevy motors anyways)

*wolfthing2000* · 06-03-2005, 11:11 PM

A way to look at it ( or 2) is to imagine a bycicle with pedal arms ( distance from center of pedal sprocket to center of pedal attatchment point) that has , say, a 8" length and it is a little difficult to get up a hill. So you increase that length by 2" it is now easier to get up the hill because you have increased the torque ( what a stroker motor does) More leverage!

Or , you can't quite break loose a large nut from your output yoke on your transmission with your regular length breaker bar no matter how hard it is you pull. You slip a length of pipe ( cheater) over the breaker bar and increase your handle length and it becomes easy to loosen the nut. More torque.
These reasons are why a stroker motor is a great towing or puller engine. They whip your head back off the line too!
Wolfthing

R@nger · 06-04-2005, 01:14 AM

Oh alright...awesome, thanks for explaining that guys.

06-03-2005, 09:53 PM	#1
R@nger Psalm 23 Join Date: Apr 2005 Location: Utah Posts: 360	Question about stroker engines I've been seeing alot of "Stroker" engine threads lately. Honestly I have not a clue what qualifies an engine as a "stroker"...could someone please explain this to me. Thanks __________________ 71 GMC Fleetside C15(cab), 3/4 ton, 350, Holley Street Avenger 570cfm carb, TH350 trans, Leaf-springs, 2WD. "Peter are you sleeping on the job? No I have a bug in my eye and I'm trying to suffocate him." - Family Guy

06-03-2005, 09:58 PM	#2
pissonNOS senior member Join Date: Feb 2003 Location: fort macleod alberta Posts: 2,770	it has to do with the stroke you piston travels. attained by a new crank shaft. someone please correct me or add to this if im wrong __________________ 69 GMC bagged

06-03-2005, 10:25 PM	#4
Beast388 Suburbans RULE! Join Date: Jan 2000 Location: Clinton, IA 52732 Posts: 689	The term generally refers to engines that have strokes longer than originally equipped. For example, the 388 in my Burb. Originally, it was a 350 with a 3.48" stroke. I rebuilt the engine and used a different crankshaft that had a 3.75" stroke. Generally new pistons are required as well. __________________ --Ben 71 GMC Suburban 4X4 The "Beast" 388 CID Stroker, TH350, NP205, 8-lug D44, 14BFF w/ Detroit, 4.10:1 gears, 4-Wheel Disks 4" Lift, 35" MT/R's.

06-04-2005, 01:14 AM	#7
R@nger Psalm 23 Join Date: Apr 2005 Location: Utah Posts: 360	Oh alright...awesome, thanks for explaining that guys. __________________ 71 GMC Fleetside C15(cab), 3/4 ton, 350, Holley Street Avenger 570cfm carb, TH350 trans, Leaf-springs, 2WD. "Peter are you sleeping on the job? No I have a bug in my eye and I'm trying to suffocate him." - Family Guy

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06-03-2005, 10:32 PM	#5
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Adding stroke...that defines stroker. Many common ones, 383 being top of the list. (for chevy motors anyways)

06-03-2005, 11:11 PM	#6
wolfthing2000 Account Suspended Join Date: Oct 2004 Posts: 1,276	A way to look at it ( or 2) is to imagine a bycicle with pedal arms ( distance from center of pedal sprocket to center of pedal attatchment point) that has , say, a 8" length and it is a little difficult to get up a hill. So you increase that length by 2" it is now easier to get up the hill because you have increased the torque ( what a stroker motor does) More leverage! Or , you can't quite break loose a large nut from your output yoke on your transmission with your regular length breaker bar no matter how hard it is you pull. You slip a length of pipe ( cheater) over the breaker bar and increase your handle length and it becomes easy to loosen the nut. More torque. These reasons are why a stroker motor is a great towing or puller engine. They whip your head back off the line too! Wolfthing



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