2,, RPM. Excellent low-end torque. These camshaft options provide a range of choices for enthusiasts looking to extract maximum high-end power from their LQ4 engine with heads. The duration, lift, and power band range specifications help determine the performance characteristics of each camshaft 99 and up Truck heads 99 and up Truck heads 05 and up Truck heads ***reportedly came on a few corvette's too*** These are basically Heads LQ4 Iron center bolt heads 01 and up LQ4 and LQ9 aluminum center bolt heads 01 - 04 LQ9 aluminum center bolt heads I currently have a 99 LQ4 L motor with ~k miles, that has a broken crank. (sheared in half between 4/5 rods.) Still runs though! Motor is complete. pan to intake, accessories, ECM/wiring harness, everything. But it has iron heads. I also have parts off an 04 L that lost a timing chain at k miles
Good torque cam for "mostly stock" lq4? | GM Truck Club Forum
The first has to do with port shape. The LS6 and the later LQ9-LQ4 heads used reshaped intake ports and D-shaped -- as opposed to oval-shaped -- exhaust ports for better flow: cfm intake and 70 cfm exhaust for the 's, and intake and 75 cfm for the 's. The second major difference is that the LS6 heads used hollow, sodium-filled Shakopee, MN. Posts. Originally Posted by HotRod i have an 06 yukon denali with same cam w/spring but stock 6L heads all stock. will this tune transfer / LS CNC Ported Heads. $ 1, – $ 1, Valve Options. Choose an option No Valves Stage 1 / Stock Valves Stage 2 / Stainless Valves Stage 3 / Stainless Valves Stage 4 / Stainless Valves. Spring Options. Choose an option No Springs Lift LS6 Blue BeeHive Dual Spring Kit w/ Steel Retainers With the heads my compression ratio will be about The machine shop thinks I should shave the heads for even more compression. I honestly think might be a little high and should knock it down closer to I know the later model trucks gm bumped the compression to
LQ4 Head upgrade | GMC Truck Forum
Usually found in GM trucks, the LS engines with heads come in two sizes: L and L. These engines have been praised for their sophisticated design and architecture, featuring a cathedral-shaped port and a smaller combustion chamber that allows for higher compression ratios Finally installed the lq4 with heads in a 98 obs, I changed the cam to a compcams at the last minute, its a little bigger than the sloppy cam, this idle