Hey guys
Thanks for the reply's. I am running the factory pulley and Serpentine Magnum setup. The main reason for wanting the engine to run cooler is the under bonnet temp feels very hot. After a cruise I can not touch things like the brake booster etc as the whole engine bay is stinking hot. The heat coming from under the car at idle feels like an oven on high with a fan. It comes through the firewall and makes the car very hot to cruise during the day.
The other reason is the HP. The 50hp loss was with a holley blow through carb. I tried to get it sorted but it hated the heat. I think it may have been boiling fuel. On the dyno it would consistently run 380hp at 190F or above. But let it cool to 160 and I easily get 430 HP at the wheels every time.
I have now switched to a Fitech throttle body injection as I spend a heap of money on the dyno but it still ran like crap. The fitech seems to handle the heat much better but it has not been on the dyno with the Fitech yet.
The other day I pulled the centre out of the thermostat and with only limited testing it looks better. I am hovering around 190 to 195 but will have to have a few more runs.
I am running twin thermos fans with shrouds. They use these fans here in Australia to cool our performance factory V8 turbo cars so I think they should do the job foe me. I am running a bigger ally radiator with a tight fin count but the radiator is a $200 ebay one that I fit after the factory radiator couldn't keep the engine cool. I run 32 degrees timing at cruise. I have tried 40 but it doesn't seem to make any difference at all.
I will run it over the next few days and if it wants to run at 195 then I will have to just be happy there. It seemed to cruise down the highway at 160 for an hour then all of a sudden it would hit 200 for no reason but with the middle of the thermostat taken out it seems to be more consistent now.
The under bonnet temp seems excessive. Maybe I need a scoop or to coat or wrap my headers. Also my intake air temp at cruise is 100F and that's after its gone through the intercooler.
AJ/FormS These thermos fans apparently pull 3000cfm but I do have a fan from a dodge ram here. I was going to try it but wasn't sure if it would be any good in traffic. We don't have much dodge stuff in Australia so we don't know much about them. Is this fan any good? It has 52027999 stamped into the blade. I will post a pic now.
View attachment 1715019879
