looking for opinions

[larrym]

Yes 4.56 with a spacer eeeep


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[good2win22]

Run some numbers http://www.tciauto.com/tc/racing-calculators/

6000rpm, 3.73, 26" tires with 8% slip is 115mph. 28" tires is 124mph

I think it's going to need something numerically lower.

Rate of acceleration and RPM drop between gears is going to play a huge part in this.

As for the cam, get something real made - not a 20 year old shelf grind.  There has to be so much to be gained with improved lobe designs and valve events.

The cam in my barn motor has a 3012 and 3013 XFI lobe.

[larrym]

Dusty says 3.42 or 3.31 with a 10" lock up will run 10s



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[reality]

COOL. git-r- dun

[motorhead]

Run some numbers http://www.tciauto.com/tc/racing-calculators/

6000rpm, 3.73, 26" tires with 8% slip is 115mph. 28" tires is 124mph

I think it's going to need something numerically lower.

Rate of acceleration and RPM drop between gears is going to play a huge part in this.

As for the cam, get something real made - not a 20 year old shelf grind.  There has to be so much to be gained with improved lobe designs and valve events.

The cam in my barn motor has a 3012 and 3013 XFI lobe.

The thing is even those lobes are at least a decade old.  There is so much to be gained with newer more stable ramp rates these days.

I keep saying that I want to dissect some classic Buick shelf grinds to see where improvement could be made... until that day here is an interesting write up on specing cams:
https://ls1tech.com/forums/generation-iii-internal-engine/1865721-overlap-valve-events-editorial.html

[reality]

http://www.chevyhardcore.com/tech-stories/engine/1000-hp-lsx376-b15-part-3-cammed-up-and-kicking-ass/

[reality]

OR you could go with this


https://jalopnik.com/heres-how-koenigseggs-camless-engine-of-the-future-work-1788066924

[good2win22]

This has always intrigued me:


http://www.coatesengine.com/csrv-advantages.html