[Thomas]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Day2_69Z</div><div class="ubbcode-body">Buy a class engine that runs on or under the record and pull it apart......have untouched &quot;stock&quot; components on hand for comparison. That's if you can find someone to sell you (an outsider) an engine.

Protest and tear down rules still apply.........And you will NEVER SEE a fellow Class Racer called to Tech for A teardown protest.........NHRA will do a C.I. &amp; a Compression ratio check on occasions.
They are at &quot;Risk&quot; themselves......
.....for a &quot;counter protest&quot;

Its Racing......if you ain't cheat'n, you ain't race'n.....
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I'm not stating that everyone is playing by the rules.
Just because it is not &quot;legal&quot; doesn't mean that someone is not doing it.
If your engine is torn down, by the NHRA, they check certain things.
I believe that intake runner and head port volume are two of the items.
If you can modify those, without them showing any signs of tampering and they still meet stop specs, then you are good to go.

Do not kid yourself, any engine, which will run under the index, is expensive and every engine builder has his own little bag of tricks.
There is a lot more too it than just having the the best engine.
There is also a lot of tuning involved.