440 Crank in a 383

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I reckon the bore is way too small for a stroker 383?
When you fit decent 'BIG VALVE' heads on, the valves are badly shrouded before you start!
I have the same set up with a 400 block, biggest bore in a low deck deck screamer...
Pistons and rods off the shelf no drama's lol...

The car in the avatar had a 400 block done by Koffels.
547 cubes and made 900hp with Indy heads on pump gas...
What was your bore size? I assume that's a 4.500 stroke
 
Cam shaft selection
FB_IMG_1671386501073.jpg
 
I run a 437 in my race car , nothing fancy, 440 crank I cut the counterweight myself, stock 440 rods, turn mains to the 383/400 journal, notched the bottom of my cylinder bored for the rod bolts
Car run on mild set up 10.20s 132 mph car 1.38 60 ft
Been together 8 years now
No issues , great combo
Eddie RPMs out the box, 456 gears on alcohol
1150 dominator
I’d build another just the same
In fact
I am
 
I think it's a good idea to stroke the 383.

And seriously, except for some truly exotic stuff which doesn't apply in 99% of cases, there's nothing "rev happy" about a 383. Or other short stroke engines. That's a myth as far as I am concerned.

For 99% of builds out there, a stroker 383 at 436" will make more area under the power curve than a stock stroke version.

If you can afford a proper kit, go for it. If you oa 440 crank around and can find a shop to grind the mains down for a reasonable price...go for it! It's probably still cheaper than the full blown stroker kits. I have a 400 block I'm seriously still considering that route for.
 
The 383 block is a much stronger block than a thin cylinder walled 400 block. There is absolutely nothing wrong with a stroked 383.

Not everyone needs huge valved heads and 383 blocks are still available. Great sleeper combination. However as other have said skip the machine work on a OEM 440 crank unless you

know someone that will do it for free. By the time you pay to turn the counterweights down and then have the mains turned down you can buy a 4340 stroker crank for not much more.

Tom
 
The 383 block is a much stronger block than a thin cylinder walled 400 block....

By the time you pay to turn the counterweights down and then have the mains turned down you can buy a 4340 stroker crank for not much more.

Tom

383 block stronger...is that true? What makes them stronger?

I agree that the finished crank cost is probably comparable, but if you are only buying pistons and having the crank turned them the 436/541 is probably still going to be a bit less expensive.
 
383 block stronger...is that true? What makes them stronger?

I agree that the finished crank cost is probably comparable, but if you are only buying pistons and having the crank turned them the 436/541 is probably still going to be a bit less expensive.
Go to 440 source, see "everything you wanted to know about blocks, and more".
Edit: any block can have good or bad cylinder walls, depending on core shift. Always a good idea to get it sonic checked before putting any money in one. Rumor is (contrary to what even Ma Mopar said) there are no thin wall blocks.
 
Go to 440 source, see "everything you wanted to know about blocks, and more".
Edit: any block can have good or bad cylinder walls, depending on core shift. Always a good idea to get it sonic checked before putting any money in one. Rumor is (contrary to what even Ma Mopar said) there are no thin wall blocks.
(Barring core shift defects and other such anomalies) I'm sure pretty much all big block blocks are quite capable.
 
If you can get the crank work done reasonably, I'd sling that pup in a 383 block so quick people wouldn't know what was goin on. Even with a standard bore, you got 425 kyoobs. What's not to love?
 
If you can get the crank work done reasonably, I'd sling that pup in a 383 block so quick people wouldn't know what was goin on. Even with a standard bore, you got 425 kyoobs. What's not to love?
I thought it was 426, would have the same bore and stroke as the 426 wedge, as in the mighty max wedge too.
 
I thought it was 426, would have the same bore and stroke as the 426 wedge, as in the mighty max wedge too.
I guess Chrysler thought 426 sounded better. It doesn't even round up.

425.371875
 
I get 425.58xxxx maybe didn't want to be confused with a 425 olds
B x B x S x 8 x .7854 .
Same formula but I do it in a different order. BxBxSx785x8. I don't put the 4 at the end. Maybe that's the difference.
 
Same formula but I do it in a different order. BxBxSx785x8. I don't put the 4 at the end. Maybe that's the difference.
Well, the constant is a function of pi, so you can use as many digits as you want,lol.

And I still don't think I'd bother with all the machine work that has to be done to a 440 crank to only get (roughly) 432, when there's still 440s out there, or a fall-together kit for 489/496. I'd rather have 113 inches than 50. Just my opinion.
 
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It's truly amazing how many people are lulled into thinking the little **** matters.
 
It would a decent engine but you will just have a slightly smaller short deck 440, it would be a 440 with a 0.070" overbore. Even a 400 only gonna be a slightly bigger overbored short deck 440 with a 3.75" crank. I see no point stroking less than 3.91" for 400/440 and 4.25" for a 383 for 496.

I'd go stock 3.38" or just go with a 440 or if I was gonna go to the trouble of stroking the 383 at least go with 496.
 
It would a decent engine but you will just have a slightly smaller short deck 440, it would be a 440 with a 0.070" overbore. Even a 400 only gonna be a slightly bigger overbored short deck 440 with a 3.75" crank. I see no point stroking less than 3.91" for 400/440 and 4.25" for a 383 for 496.

I'd go stock 3.38" or just go with a 440 or if I was gonna go to the trouble of stroking the 383 at least go with 496.
You are right, a 440 would be a better deal overall. And the money spent on the 383 would definitely be more than the 440. Good points.

The only thing still going for the 383/400 will be a shorter deck and a bit better packaging as a result.
 
I run a 437 in my race car , nothing fancy, 440 crank I cut the counterweight myself, stock 440 rods, turn mains to the 383/400 journal, notched the bottom of my cylinder bored for the rod bolts
Car run on mild set up 10.20s 132 mph car 1.38 60 ft
Been together 8 years now
No issues , great combo
Eddie RPMs out the box, 456 gears on alcohol
1150 dominator
I’d build another just the same
In fact
I am
Funny I see bigger stroked 440's running slower.
 
Funny I see bigger stroked 440's running slower.
And you see smaller stroked engines running slower. And faster. It's all combination dependent. That combo seems well sorted out and is clearly working. It's awesome. Fast cars are awesome. So many "right" ways to get there too.
 
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