LT1-LT4 Modifications 1993-97 Gen II Small Block V8

gear ratio untuned

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Old Jul 18, 2007 | 12:59 PM
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Default gear ratio untuned

would having an untuned speedometer from my 4.10s make me fail smog due to an inaccurate reading of speed?

also would untuned LTs make me fail due to the AFR? i just need to pass the sniffer and im gonna get 2 cats welded to my ORY.
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Old Jul 18, 2007 | 01:27 PM
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I have the little black box that fixes the speedo, with out tunning it, if you want to buy it, SLP mad it.
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Old Jul 18, 2007 | 01:31 PM
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its for OBD2 i bet
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Old Jul 18, 2007 | 01:36 PM
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I dont live in CA but have heard the horror stories. In theroy, the speedo will read higher but most machines show the speed or rpms so they follow that. The issue I see is that CA actually care about the visual inspection. LT's will fail, even if there are cats, its not in a stock location. If you get a sympathetic shop, thats great, I hope you do.
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Old Jul 18, 2007 | 02:03 PM
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Originally Posted by BlackScreaminMachine
I dont live in CA but have heard the horror stories. In theroy, the speedo will read higher but most machines show the speed or rpms so they follow that. The issue I see is that CA actually care about the visual inspection. LT's will fail, even if there are cats, its not in a stock location. If you get a sympathetic shop, thats great, I hope you do.
yea im set for that its just the un tuned thing that im worried about.
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Old Jul 19, 2007 | 02:52 PM
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yea obd2 sorry
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