Lets Play A Guessing Game

Three50won said:

Hmm, get a nice cam in there and you'll be able to make more power than those stock rails and fuel lines can support, lol!! Matter of fact, you might even have to switch to a return style system. As it is tho, I'm gonna aim high and say you'll be between 500 and 550.

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sneaky98gt said:

Stock rails are good to 750 rwhp+. Not an issue.

Unless I'm mistaken, the stock line (singular, not plural) is good to over 600 rwhp. Also not an issue.

The bottleneck here is the fuel pump. I don't expect it to make much over 500.

If you were to spend $1000, I'd probably get better tires (and/or wheels), and put the rest towards the fuel system. But I wouldn't do any of that until you got it dynoed and ran it at the track enough to know where the weaknesses are.

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Three50won said:

I'm not soo sure the stock rails will support 750 rwhp. And I doubt the stock line will support over 600 rwhp. Maybe there are a few instances where they have. But I wouldn't trust it at all. I've seen people reach their limit around 550 rwhp. Any more than that and you're asking for trouble.

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sneaky98gt said:

Do a quick google search. There are quite a few people running 700+ on stock rails, and a TON of people making 600+ on stock rails. I didn't see anyone say specifically what the limit was on the stock line, but a good number of folks are running those same numbers on the stock line, too.

There's two reasons to go return and upgrade the lines/rails: so that you can put a bigger return-style pump(s) to get said fuel through the lines and rails, and because return style is easier to tune with less things that could go wrong. And unless you're making 650-750+ rwhp, there's really no reason to spend money on anything other than pumps and injectors unless you have the money and just really want to.

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