As above i have a 2wd saph running about 17 psi holding 15 with msd l8 chip it goes not bad could do with a set up but just wondering if whats the limmits of a standard pump & on all my other stage 3 cars i run about 24 psi holding about 22 its only on a t3 tho whats your opinions ? its a proper mint car & not want to go putting t34's etc on it i just think its a bit slow for stage 3 & not very responsive i will check it for air leaks also idle control valve is disconnected.