My 461 had a 160f thermostat. I went to a 180f and the engine liked it better. Then I went to a FlowKooler waterpump and I'm at a 195f thermostat now. Engine likes that even more. These engines do not like to be cold, they will only waste fuel and carbon up when colder. I also have full forged internals so the hotter the better for expansion.
I also ditched the factory mechanical fan and went with an electric with it's own full fan shroud, NEVER gets how now, even idleing with heat soak and the A/C on. The engine reevs WAY better and is generally MUCH happier without the drag of the mehanical fan.
Last edited by anguilla1980; 06/05/1702:12 PM.
http://www.TheFOAT.com/92GTA 1969 Pontiac Firebird w/BP 461ci stroker kit, 670 heads & XE274H cam. Primer black with black interior. 1992 Pontiac Trans Am GTA w/SLP Performance Package. Dark Jade Grey Metallic, grey leather, T-Tops.
