451 or 496 Stroker?

[68 HEMI GTS]

I have to laugh at all the rod ratio/short piston talk.

Countless BBC’s are built every day that have a 4.25” stroke with 6.535” rods.
And they use pistons that are shorter than what you’d use in a B block with the same stroke and rod length(because a low deck BBM has a taller deck height than a std deck BBC...... 9.980 vs 9.800).

A 4.25 stroke/6.535 rod/1.320 piston isn’t even beginning to push the envelope in terms of rod ratio or piston compression height.
The rod ratio ends up the same as a stock 454, or a SBM stroker with stock length rods and a 4” stroke.

Personally...... I’ll take the cubes.

these posts kill me. Lol

 

[TT from NH]

My best race was on a lonely Sunday morning test and tune about 8 years ago at Rock Falls Wisconsin track. My first run was about 13 seconds solo. Just to warm up then do a quick check on valves. When ready to let it rip I did my burn out and began to stage. A primer brown '67 Chevelle was doing the same. I can see it was a kid. And two top of air cleaner housing just peaking out of a cut hood. Amber light lit and I let the two step launch button. Go. I hit 2nd gear and can hear that Chevelle's 454 screaming right on the side of my door. And he sat there the whole way down the track. Both cars ran same 10.30s. I won on a very slight hole shot. My Duster's 451 with its short tubed Hooker headers is loud. But so was that Chevelle. While driving back on the return road. The whole track guys came over with big smiles and thumbs up to both of us. The starter saying. "You two got our attention. That WAS A DRAG RACE." Once stopped one of the tech guys said "Both you ran at least 2 seconds faster than what was predicted." My friend who was helping said. "You two were so loud compared to anything here. Everyone stopped what they were doing to take a look. I of course walked over to the Chev's pit. And there was a 17 year old and his dad. It was his first run on a car he and his dad built in a home garage. And he did not embarrass himself to say the least. I got to watch his 2nd run right in front of me while I was in the water box. He destroyed a poor Mustang.

I know this story probably doesn't belong on this thread. But thought I would share a 451 moment. I have been in far bigger races. With even bigger wins. But that race did more for my love of the sport than any of the money stuff. When I was 17? I was no where near low 10s. Home built naturally aspirated muscle build against home built naturally aspirated muscle. It just doesn't get better than that.

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Love the story! Glory days. It was especially great of you to go over and talk to the boy and his dad....

 

[Dusty Dude]

I have a 496" stroker in my '69 Coronet using the 383 block and a 440 Source kit with lightened crank and their CNC ported heads. It's bolted up to a built 727 with a 3,000 stall converter and 3.54 gear. Believe me, it's all this old man can handle on the street.

 

[oldkimmer]

I’ve never bought to much into the rod to stroke ratio. I’ve built 2 451s to compare. 1 with a 6.535 rod and the other with the 6.76 rod. Both had compression the same as well as everything else that’s cams, heads, carb and intake and rockers. Both tested in the same car. Not even a tenth of a second difference. Kim

 

[RON REAGLE]

The 451 in my 68 Barracuda is a beast. Rev's like a small block with big block torque