where can i take out my speed cut? any shop also can?? must i do anything else after i take out my speed cut???
Go to N1 and buy one, install it and test on a Dyno machine.
If u keep pushing untill 145kmh and feel the car is "going" untill u reach 150kmh and suddenly ur engine cuts off and ur car slugged back for 3 seconds, then engine moves again, thats ur speed cut.
If no matter how u push until near 85% to ur read line and the car is NOT moving anymore faster, that means ur engine power is inssuficient
If your final drive is NO WHERE near red line and the car is NOT going any faster, that means ur gear ratio is NOT meant for top speed, while ur 2nd final drive is TOO short for top speed.
My car can go beyond 200kmh, coz my final drive is short, 190kmh @ 5300rpm....and whenever I go more than 192kmh, speedcut, engine stalled for 3 seconds untill fall back to 185kmh, engine comes alive again.
So, your case, is which one ? hmmm