Will 5/16 fuel lines adequately supply a moderately built 440?

[Grec]

My '73 Challenger has a 440 in it. However, it till retails the 5/16 fuel lines from the tank to engine compartment.

I'm looking at replacing the fuel pump and wanted to know if I should step up to a 3/8 set up, or would the 5/16 work fine?

I'm thinking I would like to get somewhere around 550hp out of the motor... so nothing major, but still a big leap from what those lines were originally feeding.

Can 5/16 handle it?

[4Cruizn]

I say if you're going to have over 500HP, you need to upgrade IMO.  Don't forget the sending unit also as that needs updated too!   

[GoodysGotaCuda]

Upgrade, the fuel line isn't very expensive. My 318 has the fuel system to supply 11's. Overkill never hurt. 

[Grec]

Alrighty then.

Added to the list. :-)

[GoodysGotaCuda]

$59 for stock. $95 for Stainless
http://www.gastanks.com/products.asp?dept=143

[Grec]

Right on.

Thanks.

[Chryco Psycho]

I ran low 12s with 5/16 "lines then they became restrictive  but they will work to about 500 hp then I upgraded to 3/8"

[Grec]

Gotcha. Sounds like I'd be pushing their limit with the hp I'm wanting.

Looks like 3/8 is in her future.