Technical Bored and Stroked - No Replacement for Displacement

Crank swaps, offset grinding, sleaving, tall decks... What's the largest you know of any Hamb era engine being opened up to, and how? Flatheads, Caddys, MELs, SBCs, Olds, Mopar..

400 SBC were around long before the factory version, right?

 

The 409 I ran this year is .100 over bore and a 427 crank. Came out to 460 inches.

 

To lazy to find it. 283 SBC with a displacement of 350 maybe plus.
Edit- Found it! Posted by Speed Gems from FalconGeorge.

 

Take any 429 Ford, bore it .080 and stick in a 4.50 stroke crank for 557 cubic inches.

 

Sorry, but the Ford 385 Series engines miss the HAMB mark by a few years.
I think the 283/402 with it’s 119 inch increase over stock might be the overall winner, but maybe someone knows of another. When you think about it stuffing a four inch crank in an early, small journal Chevy block it's pretty impressive.

 

Lot of Chryslers ran at 456 cid. Mel engines at 508

 

Don Montgomery talks about 460" Olds and 360" Small Block Chevys in his Supercharged Gasser book. I think he mentions even bigger Cadillac and Lincoln engines (around 500 inches), but I can't find it right now so...............

 

Great question. I am interested in seeing all the responses from my fellow hambers. My ears are wide open. Let's hear them.

 

^^^^^ I don't hear a thing here.

 

^^^^^ I didn't hear what size it was. But I could see it.

 

But what's cooler, if you ask me, is if you put a 317 Lincoln crank in a .060 over 368 you get a 363. Nice for SCTA "C" classes. And if you put a 55 Pontiac crank in a 331 Chrysler you get a 300 inch class "D" engine. And yes you can put a Pontiac crank in a Chrysler if you really want to. More is not always better if you want to make class,

 

1965 was the banner year for the Mark IV Chevrolet engines.
489 cubic inch big block Chevy
It's a 454, bored out to 4.280 (.030 over stock 4.25)
Stroker 4130 crank: 4.25 inch (stock is 4.00)

 

Displacement is nice, but rather useless if you don't have the matching flow past ports, valves etc. to fill and evacuate those big cylinders quick enough. There are plenty of big displacement low power engines out there as a result of cylinder heads etc. that just doesn't let the engine breathe.

 

Depends on how much of the original engine you want to keep!
Take a 1956 Chevy 265 block [casting #3720991] and cut away everything around the casting numbers and date code.
Replace everything cut away with donor parts from a "Dart" block [this requires welding and cleaning up]

Bore out to 4.155 inches and add a 4.125 inch stroker crank to get 447 cu in. [a whopping 182" increase] and HAMB friendly due to it being 1956 build with modern mods

A perfect engine for entering into historic racing [It's called innovation until you get caught]

 

Kerry
If I thought it wouldn't get the boot (again) I'd photoshop a shot of my aluminum 427 Rodeck small block painted Chevrolet orange.
Would anyone notice? Probably not! Would anyone complain? Probably!

 

I wouldn't complain on the HAMB

A formal protest maybe .
"I know he's cheatin' cause I'm cheatin' and he beat me"

 

Didn't the 454 come out in 1970?

 

Yes. If mine doesn't fit I'll delete.
A 396 would be the only actual HAMB era BBC
427 was a 1966 engine.
454 in '70
after that who cares...

 

It's old enough for me. Iv'e got a 514 BBF in the 57 on my avatar.

 

The 402 might sneak under the radar too.

Some background here, can't vouch for its accuracy.

https://itstillruns.com/history-chevy-402-engine-7750247.html

 

At the other end of the spectrum: The v8-60 in my heap sports a whopping 136 cubes. Being a 1940 block, it has removable sleeves from the factory (supposedly instead of boring, you just knocked in a new sleeve and slug, ready to run). These can be removed and pistons run directly on the block. Also the 1940 crank had larger rod journals. Offset grind with the 37-39 rods and I believe it's around 180 cubes.

But, what's the point? More of the big brother flatties around anyway.

 

You can get up into the 500 inches area with the a stroker FE

http://www.survivalmotorsports.com/FE-Stroker-Displacement.html

 

In 1962,Johnnie Hart of Portland,Oregon set the d/dragster record with a 354 cube flathead Ford v8 that had a 4 3/4 in STROKE and ran 122 mph in 11.23 seconds. That stroke is a 1 in increase over a stock 3 3/4 stroke. I do NOT know what the bore size was? Flatheads Forever!

 

Cubic inches are great, but cubic dollars usually prevail.

 

11.20s with a Flatty is FAST! Alot of cars now dont even come close to that number.

Sent from my SM-G950U using The H.A.M.B. mobile app

 

3 7/16" Bore = 352.66
A Big Flathead, I remember in a Rodders Journal there was talk of a Flathead that was 427 cid? with tractor sleeves & a fabricated 5"? Stroke

 

I remember reading an article in an early Hot Rod magazine (I think) that in the early sixty's Chet Herbert took some 283 Chev engines and completely bored the cylinders out of the block and pressed in sleeves and with the biggest stroker crank he could make wound up with 454 cu. in.