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Old 12-02-2018, 10:55 AM   #11
davepl
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Join Date: Aug 2006
Location: Redmond, WA
Posts: 6,332
Re: Can I start it now?

Spark, fuel, and compression, that's all you need (and to get that, proper harness connections to the LS ECM). If you want to RUN the thing then finish it properly, don't be in a rush. But if you just want to fire it up for a few seconds, you can do that without cooling. Heck you can do it without exhaust.
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