What boost pressure should I set the WI to come on at

[Richard L]

Originally Posted by vaughany

Hi Richard

My car boosts upto 19psi and produces a max torque of 340lb of torque at the hubs at 5500rpm. At 14 psi my car is producing about 290lb of torque at the hubs at 4500rpm.

Does this help you any regarding what boost pressure I should set. what are the negative effects if the WI comes on to soon?

Thanks

Vaughany

I think at 14psi is a good place to start, the engine is approaching maximum torque at 5500 where detomation is most likely. During that period, there are plenty of heat to evaporate water to add to the overall effective compression ratio.