I just bought a 07 Silverado 4.8 4x4. I am coming out of a stock CTS-V and let me tell you this thing feels like a dog. I am not a drag racer but I want to have power. I want to be able to roast the tires from a stop with out power breaking and I want fast throttle response and quick acceleration on the highway. Will a 4.8 with a Radix give me that or should I just look at changing the block?

As it sits from a stop in a straight line if I mash the throttle the tires dont even churp. It is sad. This truck does have the stock on/off road tires on it.

I am weighing the costs of 4.8 w/ Radix and all bolt ons vs a 408 block NA. It looks like the 408 will be more cash so I would do the radix if the outcome would not disappoint me.

thanks

 

swap a stock LQ4/9 6.0L in there... I think that'd do the trick...

 

If you deal with smog->radix if not swap in a 6.0 + cam +stall

 

If you add boost to that 4.8L you will like it. I'd look into a Radix kit with a TVS1900. Without too much work that weak 4.8L can be as quick as a CTS-V.

 

A 4.8 with FI will be faster then a NA 408. I only have a small cam in my other wise stock 4.8 and look what its does in a 5500 pickup

The 4.8 is actually a very strong boosted motor. I've seen some crazy boost put though them.

 

the best bang for the buck is a 6.0L swap, not difficult at all, factory reliability, just throw in a Trailblazer I6 stall converter in there while the motor is out and it'll do everything you are asking for and it can be done for much less than half the cost of a Radix kit.

 

get a blower and boost teh 4.8 till ur bored then go bigger and reuse the blower

 

a tune will let you spin the tires . . . a 6.0 swap will let you roast them both

 

boost will give you the power you're looking for.

 

Another one here for boost on the 4.8.