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Originally Posted by RG4L
I know I know, this has been asked about a million times but a lot of people have different answers.
Im planing on running a turbo kit (still deciding which one) how much psi can this stock engine hold with premium 91 (I’ll upgrade the injectors of course). I dont daily drive the car but I do drive it a lot on the weekend.  |
Torque breaks rods. Torque from lugging a motor breaks it faster. Torque at low rpms break rods more than at high rpms. Detonation breaks rods more than torque, and the limits of 91 will be reached in order to avoid detonation before the limits of the rods from torque.
For superchargers, most don’t go over 12 psi with 91, and the motor isn’t exactly loving that much boost on 91. For turbos, since torque comes on earlier, unless you do progressive boost, it might be best to limit boost to 8psi.