Bolt pattern dimensions for FAST 90/92mm TB or other aftermarket TB
#1
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From: Arlington (DFW), Texas
Bolt pattern dimensions for FAST 90/92mm TB or other aftermarket TB
Do the FAST 90 or 92mm throttle bodies have the same bolt locations as a stock unit?
I did some measuring and calculations yesterday and a stock unit has enough material between the bolt locations to clear a 92 mm opening. Basically, other then the manifold opening being smaller than the TB opening, would a FAST/Edelbrock/Nick Williams aftermarket TB bolt to a stock manifold?
I did some measuring and calculations yesterday and a stock unit has enough material between the bolt locations to clear a 92 mm opening. Basically, other then the manifold opening being smaller than the TB opening, would a FAST/Edelbrock/Nick Williams aftermarket TB bolt to a stock manifold?
#3
Same stock location for what stock intake manifold?
The 78mm intakes are a 3 bolt, and the 87mm+ are 4 bolts.
Check this link, its a huge picture of a direct port fast 90 90.
https://ls1tech.com/forums/attachmen...p-img_0037.jpg
It almost looks like it accepts two different style throttle bodies doesn't it?
The 78mm intakes are a 3 bolt, and the 87mm+ are 4 bolts.
Check this link, its a huge picture of a direct port fast 90 90.
https://ls1tech.com/forums/attachmen...p-img_0037.jpg
It almost looks like it accepts two different style throttle bodies doesn't it?
#6
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My original throttle body was a 75mm unit, while the marine intake manifold has a 78mm opening along with the ported/polished LS1 unit that is on it now. Im thinking if a 90/92mm aftermarket unit will bolt up to the stock bolt locations, I can have the intake machined for a 90 or 92mm opening. The intake is aluminum.
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