Landracing Forum
Bonneville Salt Flats Discussion => Bonneville General Chat => Topic started by: gearheadeh on February 24, 2009, 10:52:37 PM
-
Just want to clarify as I had been wondering about this and here tonight I see info regarding my question. Last time I sent a question to the BNI rules it wasn't answered!. Question: Is it okay to use a crankshaft from a different engine either from the same manafacturer or not in order to fit in a class that would not have been possible with a production engine size for that vehicle. Here is a link to the website of a Production class pickup that talks about a crank from a different manafacturer if Iam reading it right!.Is basically that it is okay in Production as long as the engine block is the same as that originally produced? Any heads(not aftermarket) and any crank?
http://www.whitegoosebar.com/
-
My opnion is this is no different than a billet (custom built) crank. I would allow it.
I'll let Dan Warner tell me I'm wrong but the way I read the rule book it's ok. i
-
In the past the determining factor has been port configuration and head bolt pattern.!!!!!!!!!
-
Both Dynoroom and Sparky are correct. Crank away!
DW
-
So if it came with say a V8 and I run 1 bank to make it an inline four....our if it came with an inline four and I use a different crank to run it as a 2 cylinder ...would that be okay in production?
-
Sure, not new - been done before.
DW
-
If you want to use a 180 degree crank knock yourself out. The SCTA allow almost unlimited engine development. That's one of the things that makes it great.
-
That is great thanks, What I love about LSR. If you can make it run, you can run it. :mrgreen:
-
"Any heads(not aftermarket) and any crank?"
See comments about port configuration and headbolt patterns before you test this water.
Dan?
-
Any heads(not aftermarket) and any crank?
I didn't catch this until Stan pointed it out. The requirements for production is the the port configuration and head bolt layout remain the same as the factory. You may indeed use aftermarket heads.
-
Yes, port configuration is critical. Had a lost record recently due to this. The heads can be aftermarket, but the port config mut be as OEM.
DW
-
"A word means what I want it to mean, neither more nor less" (Lewis Carroll)
-
I love a good discusion :-D Let me see,how can I describe this. Factory port is a single,not paired like a Chevy small block, with a single intake valve. Later version of a cousin engine has the same port spacing(single) but inside the head it splits to accommodate 2 intake valves. Haven't checked yet, but it should bolt right on!
-
not that it effects anything, but the donor dodge omni engine that crank came out of is Mfg by VW
-
I love a good discusion :-D Let me see,how can I describe this. Factory port is a single,not paired like a Chevy small block, with a single intake valve. Later version of a cousin engine has the same port spacing(single) but inside the head it splits to accommodate 2 intake valves. Haven't checked yet, but it should bolt right on!
Sorry. The rule says same valve arrangement also. i.e. in line or canted, etc.
-
"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".
-
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
-
Think Pontiac made one. (Sorta) Tempest?
Harv
-
I think :? the IH scout 4 cyl may have been a 1/2 V-8
-
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
-
Thanks Dan I just wasn't sure about production............................JD
-
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.
-
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.