I let them go when they were new just to see how much dirt it would take before I could notice a 5% drop in peak output. They were extremely dirty. I would have guessed those panels were losing at least 10% as dirty as they were, nope only 4 or 5%.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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