Steven08

I'm building my 1st LQ4 engine. I need help with cam & intake selection. I plan to put this engine in a 84 chevy truck & use it as a daily driver. I will have the 317 heads ported/polished. I have an 4L60 tranny that i plan on putting good parts in. I would like to use a stock converter with this engine. I would like to use a cam that has the same specs as the GM Hot cam. I would like to use the computer & wiring harness that came with this engine. Headers will be included.. I'm changing out the pistons to flattop. Will i need to change the rods and rocker arms? I don't wanna change any pulleys except move the AC compressor up. Any input or suggestions will be greatly appreciated.

HoleshotHoop

iTrader: (1)

Stock rods and rocker arm will be fine. you are going with Fuel Injection correct? if so Truck Intake will be fine.. for cam selection there is a hand full of good choices, good cam for daily driver and using stock converter in a full size truck i think would be Comp Cams 212/218 "HIGH LIFT" Grind Number: LS1 XR265HR-15, Duration at 050 inch Lift: 212 int./218 exh. 0.558 int./0.563 exh. lift 115 LSA.. or TSP 224R. is always good choice for DD and sounds good.. but there is a good amount for cam options. all depends on what kinda idle you want and power range. Some can even custom grind a cam for your setup.

HoleshotHoop

iTrader: (1)

Also i wouldnt spend the money to have heads Ported and Polished, 317 flow good already.. IMO if i were going to have heads ported for LQ4 id go for 5.3 heads and bump compression up some. and save the 317 for some boost!

HoleshotHoop

iTrader: (1)

Any reason for changing pistons? do you have a good short block or rebuilding?

Steven08

Thanks... I want this engine to produce close to 400HP

Steven08

I read that the only difference between the LQ4 and the LQ9 is the pistions which gives the LQ9 more hp. I want this to be on the sleeper side also. Yes the engine came with everything i needed. I just broke it down and I'm putting it in the machine shop this week.

garygnu

consider a 5.3 head with a smaller chamber .don't polish head ports ,it don't help.get good push rods .get new rocker arm bearings .consider the gm ASA cam .