As others mention, yes you can get there but not naturally aspirated. You need a blower, turbo or nitros. Once done you need to know your engine is now a time bomb. Which part will fail first?
My son has a twin turbo on his LS, it is an early 5.7L LS block, and is making right at 1,000 HP on E85, just under 900 on 91 octane so it can be done but his short block was fully upgraded, Forged Crankshaft, Forged Rods, Forged Pistons, Cam ground for a boosted engine, Fuel Pumps and injectors all upgraded to handle the power. Lots of custom computer work to make this combo work and drive normal. He has about 25,000 miles on it, never uses it for a daily driver. No way it will pass any smog check which affects your resale value. Decide what you want and how much you are willing to pay. No, start with how much you are willing to pay and then try to plug in what parts fit your budget. I have driven it, your grandma could run around in it as long as you don't give it lots of gas. Once you floor it all hell breaks loose. I should share his engine is in a 99 Corvette so only 3,200 pounds not in a 5,500 pound Tahoe. The weight in a Tahoe would put a ton more pressure on the tranny, drivelines and rear differential. Even if the engine lives the driveline will also be in line to break.
If you want huge power do it in a Diesel truck where everything is stronger and better equipped to handle it.
My son has a twin turbo on his LS, it is an early 5.7L LS block, and is making right at 1,000 HP on E85, just under 900 on 91 octane so it can be done but his short block was fully upgraded, Forged Crankshaft, Forged Rods, Forged Pistons, Cam ground for a boosted engine, Fuel Pumps and injectors all upgraded to handle the power. Lots of custom computer work to make this combo work and drive normal. He has about 25,000 miles on it, never uses it for a daily driver. No way it will pass any smog check which affects your resale value. Decide what you want and how much you are willing to pay. No, start with how much you are willing to pay and then try to plug in what parts fit your budget. I have driven it, your grandma could run around in it as long as you don't give it lots of gas. Once you floor it all hell breaks loose. I should share his engine is in a 99 Corvette so only 3,200 pounds not in a 5,500 pound Tahoe. The weight in a Tahoe would put a ton more pressure on the tranny, drivelines and rear differential. Even if the engine lives the driveline will also be in line to break.
If you want huge power do it in a Diesel truck where everything is stronger and better equipped to handle it.
