LS swap engine temps
Safety Car
Joined: May 2004
Posts: 4,363
Likes: 1,587
From: los altos hills california
Likely LS swaps include the cooling system. My electric fans only seem to come on when I shut off the motor.
The general subject was discussed here
https://www.corvetteforum.com/forums...y-cooling.html
and I posted separately here
https://www.corvetteforum.com/forums...n-my-69-a.html
Here in the California bay area I don't much see really really hot days but when I do its still not a problem
The general subject was discussed here
https://www.corvetteforum.com/forums...y-cooling.html
and I posted separately here
https://www.corvetteforum.com/forums...n-my-69-a.html
Here in the California bay area I don't much see really really hot days but when I do its still not a problem
Team Owner
Joined: Feb 1999
Posts: 34,454
Likes: 665
From: Republic of Texas
LS engines are designed to run a little warmer than a Gen I SBC. Most LS operating temp is around 200-220 degrees, not unusual to see 220-225 degrees sitting in traffic on a 100 degree day with A/C on.
Safety Car
Joined: May 2004
Posts: 4,363
Likes: 1,587
From: los altos hills california
Despite all the fooling around with underhood air temps in my posts, I never thought to measure my motor with an IR thermometer. My gauge I've calibrated and it always falls in the normal range. Heat has never been a concern.
Thread Starter
Pro
Joined: Oct 2017
Posts: 568
Likes: 205
Melting Slicks
Joined: Sep 2010
Posts: 3,306
Likes: 697
On my LS swaps it depended on the radiator size a bit.
On my summer driver LS swaps I run a 180 degree thermostat. ECM set to turn on the fan at 205 and off at 195.
Having said that I run a 195 degree thermostat in my 98 Wrangler with LS6 swap to get more heat in the cab when I'm plowing snow. The ECM is set at 210 on and 195 off.
When I did my 71 C3 LS swap I used a generic LS swap rad. Biggest I could fit. Never had any kind of cooling issues. Single 16" Spal fan.
Keep in mine my stock 2020 Silverado ran at 210 day in and day out.
On my summer driver LS swaps I run a 180 degree thermostat. ECM set to turn on the fan at 205 and off at 195.
Having said that I run a 195 degree thermostat in my 98 Wrangler with LS6 swap to get more heat in the cab when I'm plowing snow. The ECM is set at 210 on and 195 off.
When I did my 71 C3 LS swap I used a generic LS swap rad. Biggest I could fit. Never had any kind of cooling issues. Single 16" Spal fan.
Keep in mine my stock 2020 Silverado ran at 210 day in and day out.
Thread Starter
Pro
Joined: Oct 2017
Posts: 568
Likes: 205
On my LS swaps it depended on the radiator size a bit.
On my summer driver LS swaps I run a 180 degree thermostat. ECM set to turn on the fan at 205 and off at 195.
Having said that I run a 195 degree thermostat in my 98 Wrangler with LS6 swap to get more heat in the cab when I'm plowing snow. The ECM is set at 210 on and 195 off.
When I did my 71 C3 LS swap I used a generic LS swap rad. Biggest I could fit. Never had any kind of cooling issues. Single 16" Spal fan.
Keep in mine my stock 2020 Silverado ran at 210 day in and day out.
On my summer driver LS swaps I run a 180 degree thermostat. ECM set to turn on the fan at 205 and off at 195.
Having said that I run a 195 degree thermostat in my 98 Wrangler with LS6 swap to get more heat in the cab when I'm plowing snow. The ECM is set at 210 on and 195 off.
When I did my 71 C3 LS swap I used a generic LS swap rad. Biggest I could fit. Never had any kind of cooling issues. Single 16" Spal fan.
Keep in mine my stock 2020 Silverado ran at 210 day in and day out.
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Melting Slicks
Joined: Jul 2019
Posts: 2,294
Likes: 2,015
From: MA/NH Seacoast
The engine will be happy at those temps. I set mine up to run a little cooler, but I have one setup running at that temp for years and it's fine.