Can anyone chime in and give me some advice.. 2008 GMC 1500 6.2 AWD none flex fuel and there is no fuel pressure control module. Can I put a Walbro 450 in the tank and use the stock lines and fuel rails with 80lb injectors?
shooting for 10lbs with e85. The truck has a trick performance kit with a 78/75 turbo.
Any help is very much appreciated!

Would I be better off with a 255?

That’s where he wants to be so that’s why we picked a 450lph. We are trying to keep most things stock as possible. My buddy is competing against his brother in Rocky Mountain drag week this coming summer. So I’m trying to line it all out for him lol They are just doing it for fun.

The 450 works, but it overpowers the stock regulator. I was getting 75 psi at idle (commanded 58) and it wouldn’t run right. Others have seem to have better luck on stock set ups with the 450 than I did. however, ended up Taking the pump assembly apart and threw in the hellcat pump with an aeromotive regulator.

That’s what I was worried about. I definitely don’t want any problems. When you put the hellcat pump in what did you do for the return line?

The factory feed line worked as a return which I let dump right into the bucket.

Perfect! Thank you for the help