Give me the Cliff's Notes version...I'm busy drinking beer.Originally Posted by mossaidis
It's always been my contention that extra-US-market engine are compliant as basis for IT/ST builds as long as the components used are exactly the same as the US-spec car. This goes back to the early 2000s when someone (honestly, not me or "a friend") wanted to use a JDM SR20DE as a basis to build an ITA engine. In my opinion, it was legal to use a JDM SR20DE to build an ITA engine, as long as everything that ended up in the final assembly was the same - dimensionally and metallurgically - as the US SR20DE.
Same applies to STL. If someone wants to run, for example, a B16A (versus a US-spec B16A2) in STL in their Civic, I say it's compliant as long as the compression ratio is below 11:1 and the total valve lift is within .425" (dunno if it is). I know the B16A has different pistons and cams, but the compression ratio is within 11:1. And pistons and rods (and cams) are free (within prep limits.)
Now, if someone installs a JDM B16A engine with some wild-ass intake manifold and throttle body that was never installed in the US and tosses that into the car? Not compliant. Parts are decisively not what was installed in a US-spec car.
Otherwise, in the end, it really is the same thing, except for what the Shinto eunich ex-Ninja monk stamps on the block as it passed by on the production line. Compliant to the alternate parts letter, and compliant to the alternate parts spirit.
- GA
Reply With Quote
Bookmarks