fastGBcamaro

iTrader: (10)

I know that the stock LS1 fuel rails tend to become a restriction at about 600 rwhp, but is this the same for the rails that come with the assembled L76 intake? Just wondering, because I plan on running a 150 dry shot to my setup and it would put me over that mark. Should I switch to a different rail?

69LT1Bird

iTrader: (1)

The rail used in the L76 intake (pn 12572174) is the same one used on the 2008-2009 LS3 and 2005-2007 LS2 Corvettes.

fastGBcamaro

iTrader: (10)

Thanks 69LT1bird. I wonder then if it can support more flow since those cars mentioned with the same rails make quite a bit more power than the LS1. Does anyone know? Will the L76 rails support more than 600 rwhp?

69LT1Bird

iTrader: (1)

They are both 3/8" tubing. If you need the flow, you will need to run bigger fuel line from the tank and get aftermarket rails.

Mike @ New Era

iTrader: (10)

I've made 650 rwhp with these rails with the stock fuel lines through an auto (on turbo car) so I don't think 600 should be a problem .

fastGBcamaro

iTrader: (10)

Thanks Mike, if you made 650 without a problem then maybe there is a little something different about these rails over stock LS1 rails that allows them to flow better.

Nasty N8

iTrader: (33)

You can make more power than 600 but does not mean they do not become the restriction. You can overcome the restriction with more fuel pump but you will still create heat and lack volume. If you need more than one Walbro can flow 600-650 you need to do a return style system with bigger fuel rails.

Nate