production class engines

[Dynoroom]

"A word means what I want it to mean, neither more nor less" (Lewis Carroll)

Must be why on page 1 at the end of the second paragraph in the current rule book it says
"Any interpretation or deviation of these rules is left to the discretion of the officials. Their decisions are final".

[jimmy six]

Dan, I'll give an example of what gearheadeh maybe saying, then you tell if it's right.

Suppose he builds a "C" Production 1985 Camaro and uses 2 cylinders of a 350 making it a "H" at 87.5 cubic inches. If it's legal there better be a 12 push rod missing when we take off the valve covers. I would need to seal those covers on before the first time it ran too.

I remeber a lot of "half" motors but never in production. I probably wrong on this...............JD

[hitz]

Think Pontiac made one. (Sorta) Tempest?

Harv

[SPARKY]

I think  the IH scout 4 cyl may have been a 1/2 V-8

[dwarner]

This has been done before. Dave Sarno built a 1/2 V8 for his F/GC record. We have seen Russ Eyres' 1/2 OHV/Flathead set over 20 records, none in Production. Jesse Winders has 1/2 of a VW, 2 pistons missing and Wayne Jesel pulled rockers and pushrods to go to 7 cylinders last Speedweek. The Smith Bros disabled one cylinder a few years ago to change class. As long as the engine meets the other criteria for Production, is verifiable, the number of cylinders should not matter. The vehicle will not be as fast as I like to go and if running an open record, so be it not much of a challenge there.

DW

[jimmy six]

Thanks Dan I just wasn't sure about production............................JD

[saltfever]

There is some question about aftermarket blocks like DART, World, etc. with raised cam locations. Can anybody clarify?

To make it perfectly clear the Heads can be any aftermarket head but that means you can't run a symmetrical port head in place of a stock Siamese port. The head must be Siamese ports. Since the SBC had two valves you are also locked into that config. If the OEM made the block in the car you are unrestricted on the short block assembly. (crank, rods, pistons, etc).

Be careful about CLASSIC PRO. While data acquisition is now legal, Non-OEM EFI is not. Mechanical FI or carb only.

[Dynoroom]

There is some question about aftermarket blocks like DART, World, etc. with raised cam locations. Can anybody clarify?

Raised cam or relocated pan rails, deck height, etc. are not legal. However aftermarket blocks in standard configurations are.