production class engines

[gearheadeh]

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/

[Dynoroom]

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

[SPARKY]

In the past the determining factor has been port configuration and head bolt pattern.!!!!!!!!!

[dwarner]

Both Dynoroom and Sparky are correct. Crank away!

DW

[gearheadeh]

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?

[dwarner]

Sure, not new - been done before.

DW

[Dynoroom]

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.

[gearheadeh]

That is great thanks, What I love about LSR. If you can make it run, you can run it.

[Stan Back]

"Any heads(not aftermarket) and any crank?"

See comments about port configuration and headbolt patterns before you test this water.

Dan?

[Dynoroom]

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.

[dwarner]

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

[panic]

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

[gearheadeh]

I love a good discusion     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!

[DrLudlow]

not that it effects anything, but the donor dodge omni engine that crank came out of is Mfg by VW

[Dynoroom]

I love a good discusion     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.