At what duty cycles and fuel pressures?

 

i just purchased a 2ksi but im mainly a nissan guy, anyways I had a set of 450's and got rid of them because they had a shitty/rough idle on my car. They would probably max out somewhere around the 300whp range...and thats probably pushin it...

 

Exactly what I was thinking. Probably had like an 80-90psi static FP. Compression would also play a part in how much fuel you require.

at 9.5:1 CR and ~60psi static fuel pressure I put out about 390 whp at 20 psi on RC 550's at sealevel, but they were at 100% duty cycle at 7k RPMs. I now run RC 650's. Cheap can work from time to time, but fuel is not something you want to skimp out on if you value your motor and really want to make power. Just bite the bullet and go with something that you won't have to replace based on your long-term goals.

 

I plan on hitting no more than 6 psi on the FMU and basemap. Installing a 15psi spring after the bottom end build and 660cc injectors with uberdata re tuned.