Fueling & Injection - factory fuel line and info from speed inc
05-10-2009, 10:43 PM
ok i called speed in a few weeks back and they said they have used the factory fuel line for a f-body for up to 1000 horse?
can this be true?
has anyone else done this?
i thought i needed close to 1/2 for that.
05-10-2009, 11:53 PM
A -6 or even the stock line can support 1000hp, but you can realize a few additional PSI at the rails with a bigger line as it reduces the pressure drop due to being less restrictive. This can be important on an engine where smaller injectors are run at elevated pressures (boost referenced) & the pump has to bear the additional fuel pressure in addition to the amount required to overcome the line restriction. In this case, every little bit can help.
I'm sure there a few on this site that had pressure problems (in the 700hp range with stock lines) until they added a front mount regulator. The only thing the front mount regulator did was to compensate for the line restriction.... so we know it is significant. We measured in excess of a 10# drop front to rear on the stock line in over 700rwhp applications.
Once you get in this power range, I always err on the safe side for less potential problems, but to answer your question, the line will work given enough available pump pressure.
05-11-2009, 11:41 AM
Not to mention the added heat caused by the line restriction.
05-11-2009, 11:55 AM
so how do i get hard line bigger than stock. i dont want the an flex line.
05-11-2009, 06:46 PM
You can get 1/2" hard line, but bending it correctly can be tough, or it can be hard to route when using gradual bends.
Give ma a call, as I can work something suitable up for you.
05-11-2009, 07:02 PM
Lonnie, you don't by chance know Harold that used to white TSI AWD almost completely fiberglass?
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