Just wanted to share the gains on my father-in-laws truck after the cam install.
It's a '99 5.3L ext, and it is a completely stock engine and has 105Kmiles, does have a flowmaster though.
This truck ran a 16.8 in the 1/4 mile, after tuning it came down to a 16.1.
The mod I'm posting about is the ls1 cam we just installed. Since these cams are so abundant and ppl are pretty much giving them away, we figured why not install one and see how it works out. No springs to install and the cam installation takes about 2 hrs. Most say to support the lifters, but we chanced it and they stayed up.
btw, we also installed a k&n filter.
The low end seems to still be there and the high end is very noticable.
So what kind of gains does this mean.
Last night at baytown, he went from a 16.1 to a 15.54, I think that is a badass gain for the money. (the cam cost 0$.
We still haven't tuned for the ls1 cam, so he's shifting kind of low, seems to be more in there, maybe up to 6200rpms.
For those who have a few hours to install a stock ls1 cam and want a decent gain, go for it. Some say, why not do the ls6 cam, well, you have to buy springs too and that adds to the labor. Plus , the ls6 cam likes high rpms, so uping the shifts would def. be needed to take full advantage of the cam.
Plus the ls6 cam and springs are a lot more than just the ls1 cam.
just an fyi for those thinking about it.
later,
allen
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ya, stock idle, no spring change, and we tell everyone it just has a tune, lol. , that's mean huh, making someone feel like their new truck is slower than a tune '99, hahha 
