Download - Installing a 60mm Throttle Body on a 4g93
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Installing a 60mm Throttle Body on a 4g93
Step 1: Bore the Intake Manifold to match the 60mm 1G DSM Throttle Body
Stuff a shirt in the intake manifold
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Bore the manifold to match the throttle body openning
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60mm 1G DSM on left 50mm 4G 4g93 Mirage on right
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Use an Impact Driver to remove the ISC screws. Much less chance of stripping the screws out
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4g63 NA 1G DSM Throttle Body with ISC removed
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4g93 Throttle Body with ISC removed
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4g63 1G DSM ISC
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4g93 4g Mirage ISC
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Comparison Throttle Body Picture
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4g93 ISC on top and 4g63 NA 1G DSM Throttle Body on bottom (top screw hole has to be silicone'd shut)
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Filled part of the 1G NA TB Coolant Passage With JB Weld to keep from having air leaks. (notice the ISC on the bottom has a screw
hole siliconed shut.)
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Comparison of 4g93 ISC and 4g63 ISC gasket
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File the top of the JB Weld flat and then silicone over the JB Weld and then put the rubber seal on. Next, screw the ISC to the throttle
body
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Adjust the TPS so that its resistance just barely maxes at closed TPS.
Adjust the throttle cable so the throttle body butterfly plate fully closes
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Here is how I routed the vacuum lines
Tighten the BISS all the way down and then back it out 1 full turn. Drive it for 2 days and then adjust so idle is correct.
Picture of the 4g63 NA 1G DSM Throttle Body Installed on the 4g93
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