Lq4 Cam/ motor input ???
 

Ok so im in the midst of doing my first engine swap, I am using a lq4 out of a 2000 silverado, this is what I have, or will be getting so far,
Stock lq4 bottom end
Livernoise stage 2. 243 heads, stock replacement head gaskets
Doug thorley mid length 1 7/8" mid length headers
Plan on putting ls6 intake/ throttle body on top
Double roller timing chain

4l80e, probably a 3000 rpm stall running 3:73 posi in a 12 bolt rear end with a 28-29" tire

Looking for a good street able cam with a nice chop
So far I'm kinda set on the, TSP 228r with 112 lsa

Any input would be greatly appreciated, but bear with me as I'm still learning about building engines, ls swaps, Also anyone running a setup like this what kind of power are you making
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Re: Lq4 Cam/ motor input ???
 

If you want an actual rough idle your LSA should be tighter like 109-110.

Re: Lq4 Cam/ motor input ???
 

Shoot the guys from Comp Cams a cam suggestion request, their Lsr cams are very specific to application. I contacted them for mine a 6l with L92 heads, 700r with 3.73 gears for my Blazer. They came up with the 281lsr, here is what it sounds like in a 2010 Camaro.... sorry motor for the blazer is still on the engine stand.

Re: Lq4 Cam/ motor input ???
 

Ok cool I might do that, that cam sounds good
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Re: Lq4 Cam/ motor input ???
 

It will take them a week or so to get back to you but...its worth it. Really, whats more disappointing than shelling out a crap load of cash for something that is suppose to make it faster and it falls flat on its face... As for the sound of that cam...I love it. I play it through the surround sound LOUD..It makes me happy

Re: Lq4 Cam/ motor input ???
 

why 243s instead of 317s or l92 heads? Other than that you have pretty much the exact combo I'd like to put in mine. Be sure to link your build thread if you have one!

Re: Lq4 Cam/ motor input ???
 

Oohh ya... it made 455 hp at the Wheels

Re: Lq4 Cam/ motor input ???
 

The heads are from livernoise stage 2 ls heads,

I don't have a build thread yet but I'm taking some pics and might start one once I get into it a bit more
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Re: Lq4 Cam/ motor input ???
 

I built this car for my brother. LQ4 with stock 317 heads, Comp Cams XR281HR, 228/230, .571"/.573" - 112 LSA, patriot dual springs, 4L80E with a 9.5" 3400 stall.


Made 536 to the tires on a 150 shot.

Re: Lq4 Cam/ motor input ???
 

I was looking at that cam too,it makes great power and sounds awesome. With the L92 flow characteristics I can get away with some more lift. SWEET Monte.

Re: Lq4 Cam/ motor input ???
 

This is a really good practical setup. I would go with a TBSS (trail blazer SS) or new style 07-13 intake( both are the same) and 90 mm throttle body. these will save you money in the long run. With this intake you can run the truck accessories. I would look at a 3500-3600 stall also. Get a custom stall from Yank, PI, Circle D or FTI.

Re: Lq4 Cam/ motor input ???
 

Truck accessories and "car" intakes are not mutually exclusive.

More pics of the monte.
http://i235.photobucket.com/albums/e...p/IMG_4698.jpg

http://i235.photobucket.com/albums/e...p/IMG_4697.jpg

Re: Lq4 Cam/ motor input ???
 

I've heard the ls6 cam and springs are a good alternative to the stock truck cam.....especially if you can find a good used one.....

Re: Lq4 Cam/ motor input ???
 

Onboard for future reference.

Re: Lq4 Cam/ motor input ???
 

OK guys, "Stage x" doesn't mean ANYTHING. Not since the Buick GS has the phrase "stage" in front of a setup mean anything, its just an arbitrary word. Stage 3 always sounds cooler than stage 2...its 1 more!

If you are going to buy expensive aftermarket heads, and do an intake swap...then just get an L92 setup and put the extra cash into the cam and stuff. The l92's are just nice with it in the flow game. The intake manifolds that go with them are also superior. Its not more work then what your already planning to do, and if you tell your harness person, it shouldn't make any drastic differences in the cost/work in the harness.

You can also run more cam since you'll have the flow to use it, between L92's and DT big tubes. Drop the lsa down, if you want that lump. 109-111 will usually get you there in good form. The 112 is ok depending on the cam, but anything higher and you might be disappointed.

I'd also think about going with a little more stall. With the right cam that will pull past 6k, and a good stall will give you a nice challenge to hold back with foot brakes.

North of 400 at the wheels wouldn't even be a second thought, even through the 80e.

Re: Lq4 Cam/ motor input ???
 

I'm running the setup similar to what you are wanting and I love it. Please see my sig. I have a vid of my truck running with open headers some where, I'll see if I can find it and post it here.

Re: Lq4 Cam/ motor input ???
 

To get the most out of your combo, don't get an off the shelf cam. You can get everything you want and possibly a little more with a custom grind. PatG, Martin@tick, and a few others over on ls1tech will get you what you want. The price difference between off the shelf and custom grind is negligible. 243s are good heads and with some port work are great heads for stock castings and will give you fairly big bump in compression compare to 317s. Should be a good running combo for sure.

Re: Lq4 Cam/ motor input ???
 

And both fall short of what the l92 can do.

Re: Lq4 Cam/ motor input ???
 

L92's on a stock short block 6 liter are overkill. You'll get more power under the curve with cathedral port heads. Sure, they'll make more power over 5500 but how often are you there?
Now, FI…another story.

Any decent aftermarket cam will get the job done. 228r is a great grind and a 112 will chatter nice at idle. The rest of your plan sounds good. It should move good. Maybe think about a little more converter.

Re: Lq4 Cam/ motor input ???
 

take-off L92's on a cammed 6.0, with the DT big primary longtubes, is not overkill...especially not when comparing it to going with an aftermarket head like was originally considered.

And again, why would you go through all the work of buying the ls car intake, aftermarket heads etc, and spending more to make less power.

Re: Lq4 Cam/ motor input ???
 

I agree. If I didn't already have the van intake and DBC setup I'd probably be going L92.

Re: Lq4 Cam/ motor input ???
 

A cathedral port will give more power under the curve on a stock displacement 6 liter than a rectangle port head.
That's what OP is after based on his mild converter and gear selection.
Peak power the rectangle will pull ahead but it shines over 5k.

I went rectangle on mine as with boost it's a whole different ballgame.

For OP, I'd just leave the 317's as they are, swap valvesprings and stick the cam in it and enjoy it. 317's have the same intake runner as 243's, just a bigger combustion chamber to drop compression.
If you want to bump compression pull them and have them milled or get a set of 799's.

Re: Lq4 Cam/ motor input ???
 

um no not so. this is a very mild cam, does not even require a stall. 221/226 .565/.560 on 114 http://youtu.be/XGpzf7mNJxs now don't get me wrong its not radical sounding but it hits hard enough

Re: Lq4 Cam/ motor input ???
 

Sorry, that is not a big cam and it does not sound like one. Put exhaust on it and it will tame the lope down a lot.

LSA and overlap are the key components to a rowdy idle.
Here, good reading:
http://www.crankshaftcoalition.com/w...ose_a_camshaft

Re: Lq4 Cam/ motor input ???
 

Well im not sure if this reply is for me but i said this is a mild cam, and it has a full 3" exhaust with headers and turbo muffler. Lsa does make the overlap and sound difference but what you really need to consider is the rpm range and driving style of the car or truck. I have. A friend with a dunk proven 450 whp ss camaro with oddles of $ thrown at it and another buddy with a ta with tune exhaust and 6speed eats his lunch in the 1/4.