Power Loss

silveradoreb · August 30, 2003

I want to get the 4 inch rancho lift and run a 33/12.50/16, is there going t6o be a significant power loss, I know the speedo will be off but I was just wonderin if i need to shell out 350 buck for a hypertech programmer? Thanks alot.

tmf6902 · August 30, 2003

you'll probably lose a little low end with it.......what kinda truck are you driving???

silveradoreb · August 30, 2003

it is an '02 silverado Z71 5.3!

gmcjoe · August 30, 2003

you'll probably lose a little low end with it.......what kinda truck are you driving???

Yep, by going with the bigger tires, you are basically lowering your gear ratio.

kaspar139 · September 2, 2003

I had this very same problem. I felt like I was in a d**n 2 cylinder after the lift and tires size increase! I came to the board, and they recommended getting larger gears. I also bought the Hypertech Power Programmer, and it has done nothing but correct my speedo. I didn't notice a bit of difference. I also got the K&N air filter and a Flowmaster Exhaust, and it still feels the same (only sounds better)...

To that end, I would recommend 2 things.

1) If you can afford it, get the gears WHILE getting the lift installed, because the COST of installing the gears after the lift is going to be expensive. Getting them done while they already have all that stuff down and out is a lot cheaper.

2) If you go with gears, I went with 4.10s. I would rather have 4.56 gears. The 4.10s and 33x12.5x16.5 still feel weaker than stock to me (especiallly on the low end). I would get 4.56 gears.

Good luck!