lq9 cam recomendations
I'm no expert, but the LQ9 already runs the same cam as an LS1. The next upgrade would be an LS6 cam. That only provides more hp in the 5000+ rpm range. On the LS motors, they had to upgrade the intake to take advantage of that. If you're keeping the LQ intake, that probably wont support more flow in that rpm range.
Leave it alone or upgrade everything, the intake, exhaust, cam, etc if you want more hp.
Leave it alone or upgrade everything, the intake, exhaust, cam, etc if you want more hp.
Based on the dyno tests I have read, you should have a look at the Comp Camps XR269HR. It produces more power and torque everywhere in the powerband. I would upgrade the valve springs though.
Here are a few magazine dyno tests to ponder:
http://www.hotrod.com/techarticles/e...m_hi_lift.html
http://www.cartechbooks.com/vstore/s...6&chapter=5811
http://www.hotrod.com/techarticles/e...est/index.html
TECH Enthusiast
Joined: Jan 2010
Posts: 578
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From: REALITY
Do not go by the magazine articles...... They often do not reflect real world conditions vs many guys here and other places who have real world results with such factors as drivetrain % losses and other tangibles equated in..... Too many times guys see these magazine articles and think they are going to get the same power from an engine dyno with completely different setups such as header dia, TB, air quality, etc...
Go by real world results do not get sucked into magazine articles.....
What is your power target and you need to list the full package.... Selecting a cam is about the complete package, not just pick a cam and mix matching parts.....
honeslty i am new to the whole ls engine thing... i have dreamed of putting this type of combination in my 67 since i first started dreaming of building it. at this point i still need to find a computer and have it remapped, but if i am going to do any cam changes i need to do that before having it programmed.so at this point everthing is stock. i know i will have to put aftermarket headers on it , and so far that is where i am at. thanks for the help by the way
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I'm curious to see replies as well as I'll probably end up going cam (and spring)-only while I stockpile other parts in my 317-headed lq9. Might call up a sponsor and see what they say. Mostly looking for sound and low-rpm torque.
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Verdad Gallardo Most everything I have read says that the LQ4 and LQ9 will not lose any noticeable bottom end torque with cams up to 220 degress of duration at .050". This is why I recommended the Comp Cams XR269HR. It is 216 degress of duration at .050". Most any of those aftermarket cams will require a professional tune to help the idle and driveability though.
