Re: What should I do with this CL find 6.0L LQ9 ?
 

So I found a decent set of 0821 heads with rockers and valve covers for cheap. Any gains to be had here or stick with the 317s? I don't have an intake yet so that is not a factor. I want to possibly swap this engine later with my 99 LS1. Will the computer and everything else be compatible?

Re: What should I do with this CL find 6.0L LQ9 ?
 

OK so I pulled the trigger on a set of LS AFR 210 Enforcer 64 CC chamber heads. I need to choose a cam next and was thinking about the Sloppy Stage 3. I like a big cam with a manual trans. Sorry for the slow build.

Re: What should I do with this CL find 6.0L LQ9 ?
 

Well here's a vid I could not help but watch. Thinking of sporting this cam in my combo. If I can even get close to her numbers, I will be happy. https://www.youtube.com/watch?v=lcXU0nEqbDk

Re: What should I do with this CL find 6.0L LQ9 ?
 

To take advantage of that big a cam you'll need an aftermarket intake. Are the heads square or cathedral port? Are you wanting to go for a max effort NA build or something with decent street manners that has some lope?

Re: What should I do with this CL find 6.0L LQ9 ?
 

This will most likely go into the Blazer with the T56 and 3.73 posi. Probably the last motor I will build so I want a real lopey cam. I think I have ruled against a new crank and rods and will just hone and new rings. Still not sure why someone would remove what seems to be a good engine. I will do some weekend driving to the beach and once the top comes off there will be some heavy donuts...Oh sorry, Cathedral AFR's and Intake optional due to the acreage under the hood.

Re: What should I do with this CL find 6.0L LQ9 ?
 

The TSP BFD chop master has very aggressive lope, but it's hard to find the specs on their cams online. Cam motion has a big thread going on LS1tech with a lot of dyno runs on their cams and very good tech discussion. I'd honestly call summit and talk to them about their pro LS line of cams, very nice, affordable, and they are very helpful. Be honest with yourself on how you want use the blazer. You can get some serious chop but not need a ridiculous cam that will need to spin to the moon to make power. The cathedral truck intakes are one of the best for torque which is what you'll want to get the blazer moving. They don't look the best but if you smooth it out, it looks awesome. If not you'll want use an LS6 intake at a minimum but you'll probably need to look for a FAST 92 intake and appropriate throttle body to make the combo of those heads, compression, and cam work. Or just throw a turbo on it and hang on!!

Re: What should I do with this CL find 6.0L LQ9 ?
 

I am doing some searching and it seems the longer stock type runners make good torque and high rpms. It seems that every time I find a decent used intake there is some damage that I don't want. Sheet metal looks the best to me but have a torque loss due to the shorter runners. Although, this will be behind a manual so there is that...

Re: What should I do with this CL find 6.0L LQ9 ?
 

So will a F-Body oil pan fit this thing and are all LS the same as far as oil pans? I am getting ready to work on this but I want to be able to seal it up and dont have valve covers or oil pan or timing cover.

Re: What should I do with this CL find 6.0L LQ9 ?
 

yes an f body pan will bolt right up, you need the pick tube for the oil pan being used. Sheet metal intakes are chap and look good, but I hear they can have a some weird harmonics under the hood.

Re: What should I do with this CL find 6.0L LQ9 ?
 

I am not a big fan of the plastic type intakes so I may look for a stock type runner but aluminum. Thanks for all your help!

Re: What should I do with this CL find 6.0L LQ9 ?
 

The plastic intakes are super intakes, they will make great power n/a and will take quite a lot of boost if you wanted to go that route too. Or just spend a bunch of money and do a holley high rise! Holley, edelbrock and trick flow to name a few all make a nice single plane aluminum that will work decently well with you're goals if you spec the cam accordingly. Would have the injectors in a stock location and then you'd either need to run a 4150 throttle body or an elbow and the appropriate throttle body.

Re: What should I do with this CL find 6.0L LQ9 ?
 

In regards to the fbody oil pan you may have to trim the 6.0 windage tray.

Re: What should I do with this CL find 6.0L LQ9 ?
 

Good to know as well as I don't currently have a windage tray so would it be easier just to get one from an F-Body? I stuffed an F-Body engine and trans into my Blazer so when the day comes to swap the two engines-I don't want to be swapping pans and such as my hands will be full swapping the belt system.

Re: What should I do with this CL find 6.0L LQ9 ?
 

Alright, So I am seeing some TBSS units with 50lb injectors for about $500. Might go that way.

Re: What should I do with this CL find 6.0L LQ9 ?
 

That's pretty much the best factory intake for cathedral heads.

Re: What should I do with this CL find 6.0L LQ9 ?
 

This was what I saw.
https://www.ebay.com/itm/28302937901...Cclp%3A2334524

Re: What should I do with this CL find 6.0L LQ9 ?
 

Before you commit to those injectors, which may be just fine...I would contact summit and or a few different cam companies and run your combo and goals by them, and then have your cam picked out. All the items work together to make a well rounded combo. Don't want to spend money twice on crappy injectors or ones you would just need to upgrade anyways. Also not sure if the aftermarket TBSS intakes are as good as the OE, I know the Dorman ls2 and ls6 intakes are no where near the quality of the oe intake.

Re: What should I do with this CL find 6.0L LQ9 ?
 

Good call! Thanks for the suggestion.

Re: What should I do with this CL find 6.0L LQ9 ?
 

Yessir, spend way too much time here and over at LS1 tech so just trying to help out where I can!

Re: What should I do with this CL find 6.0L LQ9 ?
 

Ok so in my search for cheap parts I found another 6.0. I think it is a LQ4 though. I really wanted the covers on the engine but I got the whole thing minus the intake and belt system for $200. Hard to turn over and I think ran low on oil as the pickup bolt was way too short and loose. What to do... Stroker?

Re: What should I do with this CL find 6.0L LQ9 ?
 

I'd tear into it and see what falls wrong with it 1st
Are the pistons dished, or flat top?
Dished is lq4....flat is lq9

Re: What should I do with this CL find 6.0L LQ9 ?
 

NOTE>>>>Apart from diameter, if you replace the balancer make absolutely sure the indexing of the keyway to the timing slot on the outer ring is the same on new balancer to the old one...there are different balancers !!!!!"

The 5.7 is a LS1, if I read this correct. No timing mark or even a key-way on the balancer. The timing is all from the reluctor wheel and only changeable via the software.

I would consider replacing the camshaft and leaving the rest stock. Of course their is the cam cost and lifters if you are smart. It's the easiest 40hp you will ever get.
That's with a stage I BTR Truck Camshaft. May get by without a tune but that's another $500 in my area. So a cam change it $1200. Maybe not that easy?

Be careful as this LQ9 has two different head bolt lengths. (2002 -2003 are different) This is a 345hp motor. The ls1 is a 350hp motor stock. You do gain torque. (380tq vers 350tq) That's why a camshaft would be recommended. Of course it a difficult choice when changing the cam could cost more than the motor! Good news is they both have the 24Tooth reluctor so computers are interchangeable for the most part.

I have a LS1 in my truck with 354 RWHP. BTR statge II.
The 6L should be 30hp more than the 5.7L everything else being the same.

Fun stuff.
Cheers

Re: What should I do with this CL find 6.0L LQ9 ?
 

The pistons are dished. I took the front cover off and oil pump appears to be real new (numbers M295-U.S.A.) and almost all of the bolts were somewhat looser than they should have been. I think maybe someone replaced the pump and just didn't know what they were doing. 317 heads. Piston jugs had a bit of water in some and some rust. I am thinking of pulling the pistons and trying a Harbor Freight hone I have. At the very least I can drop a cam and my AFR's on the LQ9 and now I can close it up with all the covers from this one. I was kind of hoping the oil pump was holding the crank from turning but the cam and pump were moving fine. I can't seem to get the cam out past the first three lobes. Also there were several different bolts on the front cover so someone was in there for sure.

Re: What should I do with this CL find 6.0L LQ9 ?
 

I regards to getting the cam out maybe a lifter dropped down and is blocking the cam?

Re: What should I do with this CL find 6.0L LQ9 ?
 

I have all the lifters out trays and all. I tried to look in there but did not have a good angle. I am guessing that one of the bearings must have been damaged. The cam seemed to turn fine when I pulled it out the small amount it did come out. Seems it wont find it's way through the next bearing. I've had lifters act up but never a cam that would not come out. I can't say that now...

Re: What should I do with this CL find 6.0L LQ9 ?
 

One more thing to add to the check list is in regards to the injectors.
The tuners I've used both chassis dyno and mail order tune wanted me to use injectors with a verified "data" sheet. I have no idea why it's needed but that's what they said. I'm guessing it's because it gives the tuner a closer base line to start with for the tune.

Re: What should I do with this CL find 6.0L LQ9 ?
 

A verified DATA Sheet- Check! This is good info! Thank you.

Re: What should I do with this CL find 6.0L LQ9 ?
 

"A verified DATA Sheet"/ That's news to me.
I used the stock injectors and the tuner commented they had some head room for fuel based on the % of one time. Every tuner is different I guess.

The only issue and it had to to deal with was a leak on the exhaust system.
The Exhaust guy didn't have the band tight. The result was the flanges ended up not parallel.
When I mentioned it to the exhaust guy his comment was basically "live with it".
Beautiful welds and a very nice run. Will not be back to his shop.
The leak messes with the air fuel ratios even though the O2 sensor is several inches up stream from the leak.
Tuner knew what it was immediately just by looking at the data.
We were able to tighten up the, very loose, clamp during the tune but it isn't perfect.
Don't run an Electronic Fuel Injected motor with out some type of exhaust on it. It messes with the learned tune and the results are not pretty.
I just stuffed mufflers on the headers with some bailing wire. Worked, for me, till I could get it tuned and an exhaust system installed.

Re: What should I do with this CL find 6.0L LQ9 ?
 

I got the cam out finally. Sure was a bad bearing. It came out with the cam and was hanging free. Had to pry a bit to break the finger joint on it. Loosened all the caps and turned the crank enough to get some long needle nose pliers on the bearing and pulled it out from the bottom and the cam came right out. It's toast of course.

Re: What should I do with this CL find 6.0L LQ9 ?
 

"It's toast of course".
What about the block? If the bearing turned in the block the fit is suspect also?
Still it's a deal for $200.

Re: What should I do with this CL find 6.0L LQ9 ?
 

I think the block is ok. Not sure. The bearing may not have turned in the block as it took a 6 foot wrecking bar to pry on the cam to get it past that stuck point. I think it just had a ridge on the back side so the next journal did not want to pass that bearing. The bearing had a lot of wear on it. No oil pressure can do weird things.