Looking for Advice on LQ4 Heads and Cam Package Upgrades

Chevrolet Technology and Innovations
1

Seeking Performance Enhancements for My LQ4

I’m currently exploring options to boost the performance of my LQ4 engine, and I’m particularly interested in heads and cam packages that can provide significant performance gains. I’ve heard a lot about the benefits of upgrading the cylinder heads and camshaft, but I’m not sure where to start.

What I’m Looking For:

  • Recommendations for Aftermarket Parts: Are there specific brands or products that you would recommend for the LQ4? I want to ensure compatibility and performance enhancement.
  • Installation Tips: If you’ve done an upgrade like this before, any tips on installation would be greatly appreciated! Are there any special tools needed or common pitfalls to avoid?
  • Performance Gains: What kind of power and efficiency improvements can I realistically expect from a quality heads and cam package? It would be helpful to know some real-world experiences.
  • Build Combinations: Are there certain specifications or combinations of heads and cams that work particularly well together for this engine?

Additional Context:

I drive a Chevrolet Silverado with my LQ4, and I’m eager to make some upgrades to improve throttle response and overall power.

If anyone has gone through this upgrade process or has insights into the best practices, I would love to hear your thoughts! Looking forward to your replies!

2

When selecting a camshaft for LQ4 heads, consider the duration and lift for the power band you want. A cam with 228/234 duration and .525 lift can really wake up the engine without sacrificing too much drivability.

3

I totally agree! It’s also critical to ensure the camshaft is compatible with your valve springs and pushrods, otherwise you might run into clearance issues.

4

Don’t forget about the kind of intake manifold and throttle body you’re pairing! They can massively influence how the cam works with the LQ4 heads.

5

Compatibility with other components is key! You wouldn’t want a lopey cam that kills your low-end torque and makes your daily driving a nightmare.

6

Exactly! Also, if you’re thinking of forced induction later on, consider how that might affect your cam selection too.

7

I recommend researching specific camshaft brands like Texas Speed or BTR; they have solid options for LQ4 setups. Getting good advice from fellow enthusiasts can really steer you in the right direction!

8

It really comes down to balancing your goals, though. Are you aiming for track performance, or is this for street use? Those choices impact everything.

9

That’s true! I know a guy who went too aggressive and ended up having to tune constantly just for a drive. Much headache!

6 Likes
10

Hah! Sounds like a “lovable” problem to have, but not really! For stability, keep your boost levels in mind, as some cams can get cranky under pressure.

11

Reflecting on all this, I think it’s crucial to consider your whole setup before jumping into purchases. Each piece interacts, and what works for one may not work for another!

6 Likes
12

I’m currently upgrading my LQ4 and I’ve been hearing great things about head and cam packages. The potential for improvements in horsepower can be significant! From what I’ve seen, gains of up to 100 HP are possible with the right setup.

5 Likes
13

Absolutely! I just finished my upgrade and saw a 90 HP increase on the dyno. The torque improvements were just as impressive, especially in the mid-range.

14

I’ve been considering the same upgrades! However, do you think a custom tune is necessary after installing LQ4 heads and cam? I’ve heard mixed opinions on this.

15

Yes, a custom tune is essential to maximize your setup. Without it, you might not reach your full potential.

16

That’s interesting! I’ve heard some say that just swapping heads and cam might not need a tune if you’re careful, but it definitely can’t hurt to have one. What did you do, qbaker?

17

After my upgrade, I went to a local shop and they did a custom tune. It was well worth the investment! My car feels completely different now, in a good way. I highly recommend it!

4 Likes
18

I’m curious about the torque curve though. Does anyone have experience with how much it can smooth out after these upgrades?

19

Generally, the torque curve becomes much more usable. You’ll find it pulls stronger across a wider RPM range, especially with a good tune.

20

I love seeing this enthusiasm, but please, don’t forget to check your fuel system! It’s crucial to support your new power levels. Has anyone upgraded their fuel pump along with the heads and cam?