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More Power - Performance

Re: More Power - Performance

Postby 06MonteSS » Oct 17 2019, 9:20pm

LOL!!!
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Re: More Power - Performance

Postby MIKE91B » Oct 17 2019, 10:01pm

Well this has been interesting to read!!! The fastest way to increase hp on an L83 is to move the peak torque to a higher rpm range. HP is a mathematical derivative of TQ. (measured tq x rpm) / 5252. Real world example if you carry 300lbft of TQ to 5500 that is 314 HP. Carry 300lbft to 6500 and now you have 371 hp. You will need to do more than just a cam but it is more than possible to put down 400WHP on a L83. In a max effort situation it may be possible to do 500WHP. It won’t be fun to drive on the street but it can be done. Just look at the math. My truck put down 360 lbft of tq if you could zing that to 7500 rpm it would be 514whp. This is stretching the limits to a ragged edge but it can be done. Your best bet is to create an end goal for performance and build to that specific goal.
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Re: More Power - Performance

Postby 519Sierra [OP] » Oct 29 2019, 2:28am

Wow I had no idea this topic would evolve into a debate about fuel. The funniest part of this whole thing is I live in Ontario and E85 is basically non existant in our area. Any comments on just pouring more power in at the pumps is not available to me. Fuel economy is the furthest thing from my thoughts. I prefer smiles per mile in this truck.

As for the fuel the best I can get is 94 octane but more than likely 91 is whats easily available. Currently running a 91 octane tune so it doesn't get less than that.

I am more interested in knowing what I need to get my 5.3 into the 400hp range and if it can be done without any forced induction.
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Re: More Power - Performance

Postby 19trax9519trax95 is online! » Oct 29 2019, 2:44am

Are you looking for 400 at the crank or wheels?

Crank wouldn't be too terrible to achieve without boost and not cost a fortune. But by far the easiest way is with some boost.
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Re: More Power - Performance

Postby durandetto » Oct 29 2019, 4:42pm

Probably, a mild cam, long tube headers, catless y-pipe and a tune should get 400 at the crank. I would imagine a catted y-pipe would still get you there. That would probably cost you a few grand easy.

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