Quote:
Originally Posted by Christ
From what I've been told, you can, as long as it's something that comes with your vehicle during the same production run. I've been told that if the engine speed doesn't match the dyno speed for your VIN, you fail.
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There's no dyno speed for smog, just engine speed. If that was true all those lifted trucks w/ huge swampers would fail every year because doubling the tire diameter can radically change gearing.
I've had a state referee tell me point blank that even though it's technically illegal to change gearing, as long as it passes smog they'll let it slide because they do not want to disassemble a gear box or axle and count the teeth in order to prove it isn't the OEM gearing, which is what they would have to do.