Stroker questions
Cargo Master
Joined: Mar 2007
Posts: 2,779
Likes: 1,009
You do not have to bore the cylinders larger, but with all the trouble, why half a$$ the job?
I'm gathering parts for a 408 and that includes a 4.0 inch stroke crank. I know that needs some notching of the block. I think they make a 3.75 stroke crank and maybe you don't on that one.
The pistons are .03 over so a bore is required. With the amount of miles on this core engine, I'm not going to find stock sized pistons. New pistons and an old bore just sounds like a really bad idea.
I'm gathering parts for a 408 and that includes a 4.0 inch stroke crank. I know that needs some notching of the block. I think they make a 3.75 stroke crank and maybe you don't on that one.
The pistons are .03 over so a bore is required. With the amount of miles on this core engine, I'm not going to find stock sized pistons. New pistons and an old bore just sounds like a really bad idea.
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Tuned
Joined: Feb 2022
Posts: 295
Likes: 7
From: Central Montana
You do not have to bore the cylinders larger, but with all the trouble, why half a$$ the job?
I'm gathering parts for a 408 and that includes a 4.0 inch stroke crank. I know that needs some notching of the block. I think they make a 3.75 stroke crank and maybe you don't on that one.
The pistons are .03 over so a bore is required. With the amount of miles on this core engine, I'm not going to find stock sized pistons. New pistons and an old bore just sounds like a really bad idea.
I'm gathering parts for a 408 and that includes a 4.0 inch stroke crank. I know that needs some notching of the block. I think they make a 3.75 stroke crank and maybe you don't on that one.
The pistons are .03 over so a bore is required. With the amount of miles on this core engine, I'm not going to find stock sized pistons. New pistons and an old bore just sounds like a really bad idea.
Cargo Master
Joined: Mar 2007
Posts: 2,779
Likes: 1,009
I know in theory, a longer stroke means more torque, but also a larger bore does too. Basically, the bigger the engine, the more power/torque you are going to get.
My understanding that you can use the 5.0/302 pistons and with a certain crank, you can get a budget build. Just because I don't want to play with my truck, doesn't mean you do. Nothing wrong with a project that will scratch and itch you have. If the funds aren't there for a quality build, just understand you may have problems.
Just like being really hungry and buying a McDonald's hamburger. It might fill that void, but it's not a good idea.
My understanding that you can use the 5.0/302 pistons and with a certain crank, you can get a budget build. Just because I don't want to play with my truck, doesn't mean you do. Nothing wrong with a project that will scratch and itch you have. If the funds aren't there for a quality build, just understand you may have problems.
Just like being really hungry and buying a McDonald's hamburger. It might fill that void, but it's not a good idea.
Thread Starter
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Tuned
Joined: Feb 2022
Posts: 295
Likes: 7
From: Central Montana
I know in theory, a longer stroke means more torque, but also a larger bore does too. Basically, the bigger the engine, the more power/torque you are going to get.
My understanding that you can use the 5.0/302 pistons and with a certain crank, you can get a budget build. Just because I don't want to play with my truck, doesn't mean you do. Nothing wrong with a project that will scratch and itch you have. If the funds aren't there for a quality build, just understand you may have problems.
Just like being really hungry and buying a McDonald's hamburger. It might fill that void, but it's not a good idea.
My understanding that you can use the 5.0/302 pistons and with a certain crank, you can get a budget build. Just because I don't want to play with my truck, doesn't mean you do. Nothing wrong with a project that will scratch and itch you have. If the funds aren't there for a quality build, just understand you may have problems.
Just like being really hungry and buying a McDonald's hamburger. It might fill that void, but it's not a good idea.
Logistics Pro
Joined: Aug 2014
Posts: 3,551
Likes: 847
By the time the budget is broke, you’ll find you need to spend more money on machining and blue printing, might as well bought a stroker kit.
I think the only affordable budget crank would be from a 400m plus machining, then figure out rod length and pistons, what compression ratio.
https://www.motortrend.com/how-to/35...w-stroker-kit/
article is 20 years ago, probably won’t find exact parts unless it is a kit
I think the only affordable budget crank would be from a 400m plus machining, then figure out rod length and pistons, what compression ratio.
https://www.motortrend.com/how-to/35...w-stroker-kit/
article is 20 years ago, probably won’t find exact parts unless it is a kit
Cargo Master
Joined: Oct 2020
Posts: 2,641
Likes: 771
Increased torque comes from the increased displacement. There is no torque advantage produced from a longer stroke vs a larger bore.
How much work the block needs really depends on your choice of rods and how much stroke you add. An engine like a 393 Windsor(3.85 stroke, 4.030 bore) using the stock Windsor rods and a piston intended for a 302 sometimes goes together with no block grinding. Sometimes it needs a little bit just depending on the style of the factory rod bolts. A 4inch stroke usually requires little to no grinding if it is built using the Scat 7/16 capscrew I beam rod which are about the best available when it comes to stroker clearance.
These engines are easy to build as a stroker because there is very little in the way. The cam is far from the crank centerline and the pan rails are wide and that gives you plenty of room.
How much work the block needs really depends on your choice of rods and how much stroke you add. An engine like a 393 Windsor(3.85 stroke, 4.030 bore) using the stock Windsor rods and a piston intended for a 302 sometimes goes together with no block grinding. Sometimes it needs a little bit just depending on the style of the factory rod bolts. A 4inch stroke usually requires little to no grinding if it is built using the Scat 7/16 capscrew I beam rod which are about the best available when it comes to stroker clearance.
These engines are easy to build as a stroker because there is very little in the way. The cam is far from the crank centerline and the pan rails are wide and that gives you plenty of room.
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