Selecting cam to work with A/C
My set-up is similar. The cam is a custom Hughes piece with 246/252 @ .050, .555"/.540" lift on a 108* LSA installed on 105* centerline. I have a 3700rpm stall lock-up converter and 4.30's with a 275/60-15 28" tall Drag radial. The ECU is supposed to take care of the A/C compressor drag, but the idle does drop about 50 rpm when its on. It's basically undetectable unless you really listed to it idle while the system cycles the pump on and off.
I'm running a factory Sanden compressor via the stock serpentine belt set-up, but I'm using the factory JTEC ecu to run EFI. So far, only an all wheel drive Nissan GTR pulled beat me out of the hole. With warm tires, the car almost dead hooks on the street. Around here the car is hard proven very hard to beat on the street. I know there are a lot of cars out there that would smoke me out of the hole and from 60+, but. I just haven't run into any of them yet.
Sometimes I forget to shut the A/C off, but I'm counting on the ECU to disconnect the A/C clutch at full throttle. Those Sanden compressors don't really take that much power to spin compared to the old school compressors.
My set-up is similar. The cam is a custom Hughes piece with 246/252 @ .050, .555"/.540" lift on a 108* LSA installed on 105* centerline. I have a 3700rpm stall lock-up converter and 4.30's with a 275/60-15 28" tall Drag radial. The ECU is supposed to take care of the A/C compressor drag, but the idle does drop about 50 rpm when its on. It's basically undetectable unless you really listed to it idle while the system cycles the pump on and off.
I'm running a factory Sanden compressor via the stock serpentine belt set-up, but I'm using the factory JTEC ecu to run EFI. So far, only an all wheel drive Nissan GTR pulled beat me out of the hole. With warm tires, the car almost dead hooks on the street. Around here the car is hard proven very hard to beat on the street. I know there are a lot of cars out there that would smoke me out of the hole and from 60+, but. I just haven't run into any of them yet.
Sometimes I forget to shut the A/C off, but I'm counting on the ECU to disconnect the A/C clutch at full throttle. Those Sanden compressors don't really take that much power to spin compared to the old school compressors.