Just about every stock car has a feature called the cold start valve. The cold start valve is located on the bottom of the throttle body and it has two lines that run into it, one in and one out. The lines transfer coolant which in a cold start situation, helps warm up the engine faster by warming up the air in the throttle body via-coolant. In a cold climate(one that has regular temps below freezing) it has a purpose, but in summer months or a climate that doesn't have a winter of freezing temps, the cold start valve hurts hp because hot air is bad air. So you have two lines to modify:
1. The coolant line coming out of the block into the cold start valve, and
2. The coolant line coming out of the cold start valve and back into the block.
The mod is simple: Bypass the valve by running line #1 where line #2 connects back into the block. Now you have coolant going out of the block and back into the block, which is essentially what it did before, but it doesn't go through the throttle body which drastically reduces air temps in the intake manifold. This whole cold start valve is just for warming up a very cold car, but it's not needed in a hot climate. V8 guys have been doing this for years in F-Bodies and Mustangs with all kinds of success. The idle may change, but again, that's life. People have reported up to 8hp at the wheels with this mod alone.
1.) Locate the Inlet & Outlet hose located on the bottom of the throttle body.
2.) Disconnect the hoses here.
3.) After you disconnect the two hoses connect them using either a fitting or the factory piece like I did. Here is another shot with how I set mine up.
I will post the finished product picture in the next day or two since I forgot then it was dark when I realized I didn't have the finished product picture.
