OK, gearheads....better sit down for this one....

[restorer-john]

Whether it works or explodes, it is a true work of art.

 

[GordonW]

Wonder why a push rod engine when OHC will rev a bit quicker, probably because his company is mostly push rod stuff. Easily over a 100 grand engine $$.

He can actually do things with the cam and rocker arms for valve lift, that would be very difficult to package into a cylinder head, for OHC. Note that he's opening the valves ONE INCH- that's an ENORMOUS valve lift. OHC engines are hard to engineer with enough rocker-arm ratio, or enough cam bearing diameter to get the lobe size needed for that much lift without rocker arms (the cam bearing bores cannot be anywhere near as large as what he uses, in an OHC head).

A head with OHC to do that much lift, would also weigh more than what he's doing, would result in a far larger engine package (the heads would be even bigger, which would make the engine even wider) and would be more time consuming and difficult to tune in the pits (he can do cam changes with s single cam and one short belt- unlike the complex long belts and multiple cams of OHC, especially DOHC, engines.

As for revving quickly- that is more of a matter of rotating mass and angular momentum in the bottom end. That will swamp the inertia of the valvetrain, in almost every case.

I think there's also the simple matter, that OHC and DOHC engines simply aren't allowed in some of the racing classes this is intended for...

Regards,
Gordon,

 

[GordonW]

Wow!

Where were these in the late 60's? Most trannies prob couldn't have handled all that power back then.

Q

Trannies, frames, differentials, driveshafts, suspensions, tires... the list goes on. Almost nothing short of a Top Fuel dragster or a Can Am car would have handled anywhere close to that kind of power, back then!

Regards,
Gordon.

 

[gadget73]

Or now if we're being honest. There are some super hp vehicles out there but its definitely not the majority.

 

[Steve.]

The future of high RPM is the Freevalve camless engine from Koenigsegg....

 

[ETLS]

And I assume bolting it to a transmission voids the warranty.

It most certainly will for the tires.

 

[Djcoolray]

You’d have to put that in something heavy....like a Buick Rivera

 

[Mystic]

Maxwell ??? Is that you ???

"Sorry chief, can't hear ya, we must still be in the cone of silence."

 

[Mystic]

P.S. Cool motor.

 

[Bynem]

Don't care how pedestrian this sounds. Someone needs to bolt that 427 and an appropriate transmission into a 1969 non-L88 Corvette. That car would spin the damn tires every time off the line, though.