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Can You Still Call An Engine "unopened" If You Have Aftermarket Cams?

Abo Bob

By Abo Bob,
in General Automotive Discussion

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Definition of unopened.  

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qikstagea Mentor

qikstagea

Posted
Posted

unopened is a way of saying stock internals, mate. Cams are in your engine, therefore by my reckoning they are internals.

if anything has been changed that doesnt just bolt onto the outside, the engine has been opened to do so.

GT-R32 Grand Master

GT-R32

Posted
Posted
I want to know. Just for general discussion. I think the LS1 boys think cams don't stop it from being 'unopened'.

The LS1 boys definitely consider a cam change to be 'opened'. Some of them have valve springs done but that is it, even then it is unopened aside form valve springs. Cams put you in a different class altogether.

AlexCim Grand Master

AlexCim

Posted
Posted

Unopened to me - Nothing changed that isnt BOLT ON.

This means that the dynamics of the engine have not been changed, aka, no REAL (to me) mods have been done to the car.

To me, bolt on is anything before the inlet side of the engine and after the exhaust outlet (side of block). So the head is part of the "engine" in my view and if it is touched it has been opened.

MK2 Experienced

MK2

Posted
Posted

Most cam work on LS1's, least when I had one was a case of getting new valve springs, pushrods, new gaskets and a better timing chain, which any way you look at it is major surgery. While its cracked open most people will opt for port, polish and nicely tuned extractors as well so calling it 'stock' would be generous at best and bullshit at worst.

qikstagea Mentor

qikstagea

Posted
Posted

i look at it this way - if you take the lid off a jam jar, then that bad boy has been opened.

Take the lid off your engine...? opened.

otherwise a cam change in a OHC engine could be considered unopened, but a cam change in an OHV engine is opened.

Abo Bob Grand Master

Abo Bob

Posted
  • Author
Posted
to me, "opened" is getting access to the internals.. which is literalyl opening the inside by taking the head off...

if cams = opened

then cam gears must also = opened

which are both wrong in my opinion...

Maybe if you get into the oily section it's opened. :)

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