Lq9 cam suggestions? Pick one please

[Knixon804]

I have a lq9/4l65e/241 going in my rig that's in my signature
K5
One tons
4.10 gears
37s
Schoenfeld headers with 2.5" dual exhaust
My 6.0 lq9 drive train is out of an escalade. I have to pull the heads so I might as well change the cam. I also have 243 heads I can install if you guys feel it's necessary.
So here's the cams I have picked out. (Stock stall trans)

Vinci chopper
210/218 .551/.551 lift 112lsa

Eps truck torque 1
214/220 .600/.564 lift 112lsa

Btr truck cam 3.
218/224 .553/.553 113+3lsa

[BR3W CITY]

Cam 3, and its also on the best cam core.

[Knixon804]

thats the cam im leaning towards.

[NorCalAnthony]

You don't have them listed but you may want to take a look at Cam Motion as well. They have drop-in cams for the 6.0 truck engines.

Another option is to call some of those vendors and have them custom spec a cam for your specific application. Most are happy to do it and it doesn't cost much (or anything) depending who you go with. That's the route I'm going with the LS2/4L80E swap in my K5.

[Knixon804]

I ended up buying the Brian tooley cam. Stage 3

[homemade87]

A note on the heads . If you are pulling the heads I would use the 243 being you already have them ( both in stock form ) . There is some advantages over the 241 . If not pulling the heads I would leave the 241 on . They are a decent head with a little bigger chamber than the 243. The 243 will give you a little more compression which is a good thing in that engine. 241=66.67cc , 243=64.45 . The runners are 241=200cc , 243=210cc . You should be around a 10.5 to 1 with the 243 .

Also why do you have to pull the heads ,is there a problem . Do not know how many miles is on your engine but if the heads come off I would put some new lifters in as well if north of 150,000 miles .

Also you are pretty much at the max spring lift for stock valve springs with that cam. I would also consider a spring upgrade . Your lifters and cam will thank you in the higher rpm range .

Just some food for thought .

[dayj1]

Originally Posted by homemade87

A note on the heads . If you are pulling the heads I would use the 243 being you already have them ( both in stock form ) . There is some advantages over the 241 . If not pulling the heads I would leave the 241 on . They are a decent head with a little bigger chamber than the 243. The 243 will give you a little more compression which is a good thing in that engine. 241=66.67cc , 243=64.45 . The runners are 241=200cc , 243=210cc . You should be around a 10.5 to 1 with the 243 .

Also why do you have to pull the heads ,is there a problem . Do not know how many miles is on your engine but if the heads come off I would put some new lifters in as well if north of 150,000 miles .

Also you are pretty much at the max spring lift for stock valve springs with that cam. I would also consider a spring upgrade . Your lifters and cam will thank you in the higher rpm range .

Just some food for thought .

I may have misread the original post, but I think the 241 refers to an NV241 transfer case. Wouldn't an lq9 normally have 317 heads? Either way, 243 heads would bump compression and I agree with your advice. I'm just trying to clarify.

[homemade87]

Day , I do believe you are correct . When I quick read it and in my mind I thought someone had put 241 heads on there . You are also correct on the 317 heads . The lq4 and lq9 came with the 317 . The 317 has a 71cc chamber so the 243 head would be a good bump . I would definitely change to the 243 over the 317 for sure .

[Knixon804]

yeah guys i am putting my 243 heads on the 6.0.
the cam i selected from BTR came as a kit with the correct valve springs.
the motor has unknown miles so i am going to put bearings in on lower end while its torn down.

[DjS71]

With the 317 heads, LQ4 is 9.4 (dished piston), LQ9 is 10.1 (flat top) so you'll get a bit more compression than listed in the zillion LQ4 posts about the 243 heads. Ought to put you in the neighborhood of 10.9. Just something to think about if you haven't, but since you can get likely get 93 octane in MI, you'll probably be fine. Also probably something a competent tuner can handle.

[Knixon804]

Originally Posted by DjS71

With the 317 heads, LQ4 is 9.4 (dished piston), LQ9 is 10.1 (flat top) so you'll get a bit more compression than listed in the zillion LQ4 posts about the 243 heads. Ought to put you in the neighborhood of 10.9. Just something to think about if you haven't, but since you can get likely get 93 octane in MI, you'll probably be fine. Also probably something a competent tuner can handle.

yeah thats fine. i have hp tuners and a good tuning guy to help me along the way. i have a stroked 408 ls in my jeep that does just fine on premium fuel so this hopped up 6.0 should be fine