I have a 96 cx hb with 98 JDM B18c with i/h/e and AEM fuel rail, fuel regulator, cams gear, and JDM H22 injectors, and a 98 JDM type r ecu. I know that all of these mods are insinifficant to my guestion but i just list them for info. anyway, my guestion is...would it be safe to shift at 8.5RPM???? I also installed an ex cluster which the RPM goes all the way to 8.5RPm. everytime I race, I shifted at 8.5RPM which indicate on the ex cluster. By having the type r ecu on, I realized power gain when shift at 8.5RPM. Since my stock motor, camshafts,valvtrain, and ecu are designed to revv up to 8RPM would it be safe to shift at 8.5RPM? I know that in order to revve pass your stock revv limit you must have upgrade camshafts and valvtrain. I had been shifting at 8.5RPM and experience no problem at all, so I just want have some external opinion by the experts in here. Sorry to ad another guestion but....where did you connect your wires for the tachometor to get the most accurate shifting point as your cluster RPM? I have a 5" tac shift light too, but its not accurate. Its off by like .600RPM so I didnt use it as my indicator when to shift and will be remove soon. thanks in advance for your opinion.