My friend and I did the 2.2 kv throttle body and warm up valve swap on his 1.8 8v mk1 Golf. Advanced the timing to 17-18 degrees (a large advance from 12), used a solid injection air pipe to stop collapse under heavy throttle and finally drilled many 3" holes through the bottom of a rs turbo air box. Standard 1.8 engine on a 1.6 gti box.
Supposed to give a genuine 8-10 hp, I can tell you it makes all the difference as the first butterfly @ 2.2 is the size of the second @ 1.8, but the the second 2.2 makes both 1.8 butterfly's look small.
The milestone test was a short hill on the way to his house. In standard trim with 1.8 parts the car peaks the hill flat in 2nd. After the part swaps and the advance, the car peaks the hill somewhere in 3rd.
End result, instant hard power in any gear up and beyond the profile of the cam (8000rpm).
|