Best overall SBF combo for a street/strip Cobra

[Gaz64]

Is there another longer rod option above 5.4?
Other than that, I like all of your ideas, numbers, and thinking.
347 came straight to me at the start of your post. Similar compression, heads, solid roller, transmission, diff gears.
Gary

[Streetwize]

Thanks for the kind words.

I really do think about the specific parameters I'm working with and have gotten pretty good at building motors that really feel exactly like what I'm wanting behind the wheel.

As for the longer rod, the only standard size I think could work would be a 5.565" 400 Chevy small block which I'm not sure it anyone makes an H beam rod for that app. the short 8.2 deck doesn't give you much Compression height to work with and there's always a balance between pin position in the bore and skirt design to maintain stability.

These 3.25" / 5.400" have been around for years and years in 331"s and turning a LOT higher than the 7200-7500 MAX I'm looking for. but 1.66 is a pretty nice Rod Ratio for the advantages of low 8.2 deck height though. a 327 Chevy is ~1.75 with the same 3.25" stroke and the standard 5.7" rod

I'm a big believer in low bobweights, Even my 4.17" stroke 427" and 4.25" Stroke mopar Small block are around 1850 which offsets at least a bit of the horrible 1.47 rod ratio.

I'd like to see piston MFGs start building slugs around the modern hemi .866" pin instead of the more common SBC .927". it would give us just a bit more meat before we get up in the ring packs.

[blykins]

Originally Posted by Streetwize

As for the longer rod, the only standard size I think could work would be a 5.565" 400 Chevy small block which I'm not sure it anyone makes an H beam rod for that app.

One other note that I'll mention here: Just because it's an H-beam doesn't make it inherently stronger, nor does the opposite hold true for an I-beam. In most cases, I do not elect to run an H-beam rod because they're usually heavier. If I do run an H-beam, it's something like a Molnar rod, which is extremely light due to a narrower beam.

One of the strongest rods that you can use is an I-beam (Oliver)!