Ok, Im picking up my new baby. It has the baby 4.8 v8.... For a police package Truck, I would think they atleast put the 5.3 but no they did not. The vehicle is a Tahoe police edition 4x4. I was planing to TVS a 5.3, but I may TVS the 4.8 until it blows, in plans of a 6.0. I may just start building a 6.0 in the garage until that special weekend.

What is the performance like on the 4.8? Dont know what to expect? Turd?

 

not at all. They lack a little of the low end torque but the SC will help there. Wind that fugger up! I really want to see some dyno graphs with a tvs in the high 6000's

 

Some people are running some great times with them, but usually they have some deep pockets or outstanding fabricating abilities.

However with that said, it's essentially the same engine as the 5.3L or 6.0 just smaller. There for you will have to find a way to make up the extra 75 horse power difference between a 4.8L and 6.0. Personally if you have plans to TVS it, I would swap the 6.0 in there in the first place. It would be far cheaper and you might as well start with it.

 

Thanks for the fast responses. I dont really want to spin it to 6000, as Im torque hungry. I agree on pulling it and putting the 6.0 to start with. Cause I would love to just stroke a 6.0 for the torque. Reason for the TVS was the instant off idle torque it produces. Im certain the TVS 6.0 blows the TVS 4.8 out of the park. Just throwing out some of my ideas. I would love to get up there in the 800lb rear wheel torque numbers.

The truck is heavy, and I will be doing a 80e trans on it to handle the added power.

 

The 4.8 lacks the torque but you can wind it on up there in rpms. Im sure its a different story with a tvs though. Get a really loose stall, gears and your torque issues will be fixed. Id say skip all that and do the tvs 6.0!

 

I'd wind out the 4.8 until you have a replacement ready to drop in. then take a weekend to do the swap.
For what it's worth i'm shifting my 5.3 at 6400. Dont know where the TVS will lose efficiency but i'm sure it'll pull for a while with a mild cam.

 

My 4.8 runs great for what little mods it has. Keep the 4.8 and put the tvs on it.

 

lol, but yours is a freak!

 

I dont know why everyone bad mouths the 4.8. Theres guys here who make 400 to 600 horsepower with them. Not bad if you ask me.

 

4.8 wont get you in the 800 rwtq area. You could probably see 420-460 rwtq with a tvs on a 4.8. I think......