C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

1989 convertible

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Old Jan 1, 2021 | 01:15 PM
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Default 1989 convertible

All stock except last owner remover catalytic converter and heater core

I just put in a 195 thermostat. What high and low temps should it run at?

124,000 miles. Its a 6 speed
and I live in Florida

Last edited by BillDurant; Jan 1, 2021 at 01:19 PM.
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Old Jan 1, 2021 | 06:10 PM
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Congrats on your '89 Vette.

Can't comment on temps for a 195deg T-stat as I run 160deg in each Vette.
For a little sharper accel you might pull the "frisbee" (disc) from the front of the WP pulley.
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Old Jan 1, 2021 | 11:09 PM
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In stock form, 230 is possible especially with the ac off. AC turns fans on. 3 things I did to my ‘89:

3 row aluminum radiator
lower temp aux fan switch (maybe 200deg? Can’t remember)
180 thermostat

Rarely gets to 210f anymore. Usually runs near 200f in central Alabama heat.
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