Fueling & Injection - LT1 stock fuel Rails HP?

How much HP In a turbo app. Can the stock LT1 Fuel rails support?

The rails are as big as any aftermarket rails as far as inside diameter. They will flow more than the LT1 block can take.... I would not hesitate to use them on a 1200rwhp vehicle.

The factory lines & fuel rail connections are the restriction & I would say about 750rwhp is a safe number for them. Above this, I would consider some larger lines & modifying the rails for AN fittings.

I can provide modified LT1 rails & a complete line kit if interested in a big horsepower system. Feel free to call if I can help.

Good to know...I will need to look into that when I put the finishing touches on my turbo project. BTW How much HP do you think my 383 lt1 block with ARP main studs can hold safe. its a 2 bolt.

I would guess around 600 flywheel before the caps start to move around.

I've seen evidence of cap movement in this range on 2 bolt blocks.

Is there any aftermarket rails out there? swapping them out would be more astetics than anything else. Lonnie do you have any pics of your modded rails?

No aftermarket rails that i know of.

I'll see if I have pictures.....

im at 700 at the wheels, thru a th400 and a big stall, and im running stock rails, lines and a duel walbro's.

oh and yea, u will need to worry bout the 2bolt mains before the stock fuel lines/rails!

im at 700 at the wheels, thru a th400 and a big stall, and im running stock rails, lines and a duel walbro's.

How much boost are you running? and what size turbo's? and injectors?

How much boost are you running? and what size turbo's? and injectors?

14psi, its a single setup with a BW s475, and 60lbs but they are maxed out.

unless you have 1000rwhp id leave them alone. they flow very well.

FWIW there are several guys with 1000RWHP that have stock fuel rails, as lonnie mentioned above they are most likely capable of around 1200HP with an appropriate fuel system.

What about the fuel lines and a 2 bolt block with ARP man studs? How much HP can they handle?

BTW thankyoufor the info on the fuel rails