I am thinking of an lq4 and would add 243 heads, but want a broad torque band that can be all done at 5500. Does a cam upgrade, like an ls6 cam, make sense? Or is the stock one good given my goals?
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I am thinking of an lq4 and would add 243 heads, but want a broad torque band that can be all done at 5500. Does a cam upgrade, like an ls6 cam, make sense? Or is the stock one good given my goals?
Any reason you want to be done at 5500? LS motors tend to react well to higher rpm bands.
If you wanted a very mild cam on a 6.0 something like a 224 from tsp would be ideal and shift around 6k. That cam by most standards would be considered small. But I've been out of the game a long time.
It's not that I have to be done by 5500, but that the target vehicle is 6700lb 2 door 4WD tahoe--this is not a bracket racer. So I want a very broad torque curve; 99.9% of the driving time would be below 5500 in any case. So although I know that in general higher HP cams achieve that by moving "up the ladder" in RPM, I didn't know if there was a better choice (especially since I'd be moving up to 243s and higher compression) that might actually do better in low and mid-range too. I'm not interested in getting a custom cam (not in my budget), but if I could find a used cam that people want to upgrade from (such as an LS6), would that be a good move?
add a turbo(5psi). nothing else
Run a smaller trucker style cam. Shift around 6k. Vinci makes one, there is a comp cam that a lot of truck guys here use. I'm sure someone will chime in with it. Pull from around just off idle to around 6k or so.
No a LS6 cam swap would not make sense and here is why...
1) a LS6 cam will add best case scenario about 30-40hp to a Lq4 with 243s.
2) you will spend about the same as a used aftermarket cam anyways.
3) your pulling the heads already why not do it right the first time.
I am not advocating a monster all out cam at all. Something in the 230 duration range while a ton of fun and super mean is not what you are looking for. In your case you should be looking towards some thing like a 212/218, HT1 cam(214/218), trickflow 216/220 or similar. That LQ4 with those heads will eat a whole ton of cam, before it even begins to effect driveability.
^^^ there is the input sure someone would throw in. That size range would be dead on.
i wouldnt use the LS6 cam for that build and how is a tahoe 6700lbs being 2wd?
i would look for a cam around 212 around 580 lift with a 114...this would give you a good bit of torque and dynamic compression would be pretty decent aiding in cylinder fill so torque would be up and be done around 5500
Now I see how you get over 6000 posts! You read them fast! I said it was a 4WD, but a 2 door.:)Quote:
Originally Posted by George C
But good advice all. I was hoping that if any cam was a good replacement, it might be a common one that people would replace for "more" cam so I might be a good used one.
6000 post isnt much especially since i been around for almost 7 yrsQuote:
Originally Posted by Goldhawg
still curious how your 6700lbs
212/218 is an extremely common used cam. Probably very close to as common to the LS6 in other applications.Quote:
Originally Posted by Goldhawg
I was wrong, remember it was over 6k; GWVR is 6100lbs.Quote:
Originally Posted by George C
is that what you read off the door tag?Quote:
Originally Posted by Goldhawg
I believe GVWR is the maximum weight the truck can safely cary. People, fuel, luggage and crap in the back. Not the actual weight of the truck.
correct. its typically 1000lbs more then actualQuote:
Originally Posted by Chevydillan