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throttle body 80 or 85?

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Old 10-22-2010, 08:45 AM
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throttle body 80 or 85?

80 or 85mm Throttle Body w/ Cable Style Linkage what do you guys think?

2000 z28 LM2 ORY air lid
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Old 10-22-2010, 11:51 AM
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80mm or 85mm means you're looking at aftermarket, which you should not do.

For either an LS1 or LS6 intake, go with a ported stock throttle body. They're cheaper and don't cause drivability issues like most aftermarket. Also, a ported stocker will make the same if not better power. The stock LS1/LS6 intake doesn't have a large enough opening to properly accomodate anything larger than 78mm.
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Old 10-24-2010, 01:54 PM
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I'd try going with a ported GM TB first, but you could easily run a 80mm with a very minor opening up (1mm all around) of the intake opening.
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Old 10-31-2010, 10:58 AM
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Re: throttle body 80 or 85?

Go with the 85mm.It should come with a adapter plate,so no need gind up your intake...
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Old 11-01-2010, 09:58 AM
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Re: throttle body 80 or 85?

Just port your stocker until you have an intake that can utilize the larger TB. You could send your LS6 intake to TPIS and have them make it a 90mm intake. It's a decent upgrade.
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