Segond56

Hi, I am just finishing putting in an LS1 into my once was 944 turbo. This is strictly a dedicated track car. In my past experience with the 4 cyc. turbo I never had problems with the car over heating. I don't suspect to have any with this motor, I feel I have the proper set up with a Griffin Rad. and the like. But what water temps are ok for the motor to run it hard at a consistent level? In my own mind I would feel anything up to 220 deg. would be ok, and getting over that mark would be too hot and maybe short shifting would be involved... so I wanted to have some feedback from the group on what level or range would be best, ok, and too hot. Your feedback is appreciated. Thanks.

bluehawk2

iTrader: (74)

I would become concerned when it started to get in the 220's, 230's i would look for a way to cool it down like you talked about and 240 I would probably idle back around to the pits. JMO

On a side note I have heard running an effective oil cooler would help with this as well.

01ssreda4

iTrader: (96)

Thats not only ridiculous, it's just plain silly.

In a stock f-body, the low speed cooling fan comes on in the 220s, the high speed comes on in the 230s. These engines run 230+ in 90+ degree weather with the AC on, stock. Concerned with mid 230s? Absolutely not. Mid 230s the best for power production? Probably not. For racing in warmer climates an oil cooler probably would be a good investment though.

highgear

You could get a manual fan switch from SLP.

01ssreda4

iTrader: (96)

With a proper low temp thermostat and adjusted fan settings I have seen about a 20-25 degree reduction in temp with no other modifications to the cooling system.

Fans typically don't run at vehicle speeds over about 35 mph, so on a race track they could actually become a restriction. A manual fan switch would only help the pit area, but an adjusted tune would serve the same purpose.