I fought the low idle also; after replacing a failed thermostatic actuator for an old "Performance" SPICA that had originally been set up specifically for someone else's turbo GTV (Jim Steck). My problem was amplified by use of an Aluminum flywheel, that reduced the idle smoothing effects of a heavier flywheel. I also drilled out the holes that held the tubular fittings for the individual cylinder hoses, and just stuck the hoses directly into the larger holes in the air manifold. This modification further increased the idle over just drilling the port that contains the rubber washer.
Originally Posted by jarrington
No loss in low end torque that I can tell, if anything it seems stronger. The Euro cams work great in a Spica injected car. Not only does it now pull hard all the way to 6k, but if I'm really pushing it I can chirp the tires a bit on a 1-2 shift. Like I said, the only think I don't much like is the low idle, which I didn't have with the old cams. Wes' book mentions that low idle can be a problem with a performance cam and recommends drilling out the idle air port. I did that and it went from barely running (500 rpm, maybe a bit less) to maybe 600. If I remove the idle air hoses completely I can get it up to about 700 rpm. We'll see if I can still pass emissions or not. No 30 year exemption in Utah...
1976 Spider (Dedicated Autocrosser, "SPICA, No Carbs")
1991 Spider Veloce (Retirement cruiser)
Scuderia Non Originale