What's the recipe for the 413 stroker that uses 383 pistons, stroker crank, etc...seems like it ends up around 472 cubic inches.
Thanks in advance!

4.15 crank and 4.25 bore is equal to 470.9 cubes or a 471. Not sure of the rod length for the 383 pistons tho

Thanks! Alyerpal2

Maybe someone will chime in with the info for rods.

I was going to say a 6.760 rod but he said he was useing a 383 piston so I wasnt sure about pin height on the piston. Or what piston height he needs. The 4.15 crank will work on the rb block and internal oiling , but with stock journals he will have to use a side grinder on the internal tube thread hole area to thin it up some. There is enough material there to do this. I have built a dozen rb engines with that combo, but 4.375 bore not 4.25.

i'm building one right now. 4.25 crank and 7.1 chevy rods at 4.250 bore for 482 c.i.
it should make a great street/strip combo and very pump gas friendly.

471 on the cheap!!!
4.15" crank
Stock LY rods
Standard size cast 383 pistons. These normally have a comp height of around 1.82. This is the key. Put a set of open chamber heads on them and the compression ratio is around 9.5:1.

10.725 - 6.768 -2.075 - 1.82 = 0.062" down in the hole. The Silvolites are 1.848, run about 9.8:1.

This is for the guy who wants a whole lot more engine for a street car or pickup. 413 blocks are nearly free, the rods come with the shortblock, the cast crank is cheap and the pistons are standard size stock replacement 383s, you can find them for not too many dollars. Keep rpm under 5500 and it'll last a long time.

R.

PS: Sure, you can build a higher-revving 471 with a lot more spendy parts but then you are in a different ballpark from me.

Storker cranks are cast, strokers on the other hand...

Was there someone going to supply a CAST 4.15 crank ?

And who here has ever used a welded crank?

No, not a 4.15 cast, but there was an Eagle 4.15 that puked out last week on Ebarf for $400 and considering what I put into a 3.75 for a 451 build to AVOID the Chinese crank in that build it's down right CHEAP! Even if it is Rice!

I'd love to build a 413 into a 470 with LY rods and one of the 440souce 4.15 $600 cranks and some 383 pistons! CHEAP! I bet I could build close to a 470hp short block for $1200 with some left over parts the last set of 383 pistons I saw went for less then a hundred bucks

I used a slanty 6 crank that was welded on the rod journals 30 years ago and it was B-E-A-UTIFUL! Not sure the skill is out there to do it at that level today Certainly not at the cost compared to offshore

So the report-card on the Eagle cranks is not good? ..... where does it get failing grades? Doesn't most of the 440S stuff come from China also ?

What type of 383 pistons are you talking about ? cast, forged... new or used ? ..and what was the CD ?

The welded crank? ... I talked to a guy locally who runs a real nice machine shop and does a TON of dirt-track stuff and some offshore boat motors. His welded deal ? ...200$ !