89sierra

Hey gents. I am trying to set up the shift points in my truck but I am wondering what is the best rpm to shift a bone stock lq9 at with a performer rpm intake.

LQ4BU

I really dont know at what RPM the power drops off on a stock LQ9. Maybe someone else can chime in with some experience. But I do believe the stock valve springs really cant take a beating past 6500.

89sierra

I was trying to look it up and as far as I could tell the guys with them in the ss and escalades said around 5500 is where they had them shift. the edelbrock site says the intake makes power from 1500-6500. I am also not sure of what rpm you start to run into valve float or where peak power is with that intake

ZONES89RS

iTrader: (25)

Set the rev limiter at 6000 and shift at 5700. I used to shift my stock 4.8 at 5900 and the stock 5.3s I've swapped at 5700. Never swapped in a stock 6.0 that did not have a cam of some sort.