Originally Posted by
FF25510
have running mine with 1/2L 5% and 1L O'D 20%, then turn it to race run, compare to Spec II the XZ had more bottom power and great top speed
, i ran it about 95 to 100F and with a RP6 plug, OS t-1050 pipe, will try RP7 plug next time.
I ran it on State Title with stock plug (RP6) and T-1050. Heaps of bottom end power compare with Speed-I and Speed-II. Especially with T-1050, it makes the XZ sing! But so bloody thirsty!!!