75mm or 70mm
04-04-2010, 08:13 PM
#51
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Join Date: Jun 2009
Location: Pennsylvania
Posts: 175
It's not needed, and not recommended, but if you insist make sure you use "sensor safe" RTV. Plain ol' "non-sensor safe" silicone RTV can destroy your narrow band O2 sensors.
As to "70mm or 75mm": If you are planning on staying n/a then get a 70mm, it will keep the charge velocity up at WOT and higher RPMs.
If you are planning on going f/i--and find a $100 expenditure (that can be largely recouped via resale on eBay) to be a bank breaker out of the $3500+ the f/i will cost--then get a 75mm TB.
But the bottom line is it really doesn't matter, we're talking 2 to 3 HP at high revs n/a or f/i, 70 or 75 mm TB...
As to "70mm or 75mm": If you are planning on staying n/a then get a 70mm, it will keep the charge velocity up at WOT and higher RPMs.
If you are planning on going f/i--and find a $100 expenditure (that can be largely recouped via resale on eBay) to be a bank breaker out of the $3500+ the f/i will cost--then get a 75mm TB.
But the bottom line is it really doesn't matter, we're talking 2 to 3 HP at high revs n/a or f/i, 70 or 75 mm TB...
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