At what point is -10 feed line required for E85?

I am shooting for 900 whp with a Procharger and E85. I currently have full length -8 feed and -6 return that came with a sumped tank I picked up. Do i need to go larger? I have not yet decided on a fuel pump yet.

 

My car's never been on a dyno since turbo install, but at shy of 4100# race weight, it recently went 9.32@147, which I'd "guess" is in the 800-ish whp range?

I run nothing but E85, through dual intank 450lph Walbros, into a -8 feed, -6 return, (both PTFE lines), and 210# injectors. With a .72 to .75 Commanded Lambda, I've never seen higher than a 60% injector duty cycle, or any fuel pressure fluctuations.

Hope that helps.

 

you are gtg with your current setup of -8 feed and -6 return. 1000 HP on regular pump gas and -6 feed is done on the regular, so even with E85 and -8 you should be all good amigo.

 

Thanks guys that is great info.