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6.0 ls camshaft opinions

General engine tech -- Drag Racing to Circle Track

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JodyB
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Re: 6.0 ls camshaft opinions

Post by JodyB » Sun Dec 09, 2018 6:49 pm

From my research, I'm just not signing up on a 212 @50 intake lobe on a low restriction 6.0 ls meant for 5500-5800 peak hp and a 6000 shift, with a 2500 stall, unless it's on a way advanced intake centerline. It is not a sbc.

Newold1
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Re: 6.0 ls camshaft opinions

Post by Newold1 » Sun Dec 09, 2018 7:42 pm

First another question I forgot to ask. How are you using this truck and why are you shifting it a 6000rpms?

What are you describing when you mention 1.8 ratio rockers?

Second don't put to much stock in 10 year old dyno-jet wheel measurements on GTO's on a internet forum from a vendor trying to sell his head work.

Your truck is not a GTO and is not going to be a 5.7, it's a 6.0L

A lot of good new things have been learned and applied in the last 10 years to the LS engines, their improved upgrades, aftermarket parts, and better power production.

Remember your 4L60E has a pretty low first gear ratio versus for example a 4L80E and that helps with low rpm acceleration and uses higher rpms of the engine where torque is higher while accelerating.

I think a lot of advice from people here like Kieth will stand you well if you listen and try to learn more what some people who really can help with strong advice.

Try not to become a self taught expert even before you have built and received great results for a planned engine before you even complete and test it.

Not meant to be critical of your thoughts or ideas, just trying to say study, learn, listen and profit from the experience of knowledgeable others.
Some of them really already know what you hope to!

And thank you for saying thank you to others who try to help!
The Older I Get, The Dumber I Get :wink:

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Re: 6.0 ls camshaft opinions

Post by Keith Morganstein » Sun Dec 09, 2018 7:43 pm

JodyB wrote:
Sun Dec 09, 2018 6:49 pm
From my research, I'm just not signing up on a 212 @50 intake lobe on a low restriction 6.0 ls meant for 5500-5800 peak hp and a 6000 shift, with a 2500 stall, unless it's on a way advanced intake centerline. It is not a sbc.
Then just follow your internet research.
Automotive Machining, cylinder head rebuilding, engine building. Can't seem to quit #-o

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Re: 6.0 ls camshaft opinions

Post by BBO Omega » Mon Dec 10, 2018 12:29 pm

I have a brand new Cam Motion 6.0 Stage 1 “Hi Lift” cam that I will make you a good deal on. Still in the wrapper. .553” lift, 204I at .050. Check their website for details. Summit price is $399. I will take $300.
73 Omega, 468 BBO, 4.185 ICON Pistons,RR/Wenzler Heads with HS 1.7 rockers and PAC 1220X Springs,J&S 5-main Halo with Billet Caps, .590I .580E 242I 256E HR Cam, 1000hp Carb,2" x 3 1/2" headers,Coan 2900rpm Conv.,TH400,3.73 12 bolt,11.32/118

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Re: 6.0 ls camshaft opinions

Post by JodyB » Mon Dec 10, 2018 1:32 pm

http://www.cpgnation.com/lets-talk-torq ... -upgrades/

This was an article by Richard Holdener building a 6.0 ls using a COMP Cams XR265HR cam .558/.563 lift , 212/218-degree duration and 115-degree lsa vs a factory lq4 6.0 cam. He even used small port/valve 5.3 heads with the larger cam.

Image

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Re: 6.0 ls camshaft opinions

Post by Newold1 » Mon Dec 10, 2018 6:25 pm

That's pretty much the spec on the Crane and the cam Kieth and I were recommending 212/218. Your smaller 205/210 cams will drop power and torque way off in a 6.0L as this latest dyno sheet shows that quite clearly. Notice the torque values are up over stock all the way from 3000 rpms and up.

You can spin it to 6000 rpms with those smaller cams but it has already fallen on its face!

Still did not get an answer for shifting at 6000rpms??
The Older I Get, The Dumber I Get :wink:

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Re: 6.0 ls camshaft opinions

Post by JodyB » Tue Dec 11, 2018 8:55 pm

Howards Cams 190315-08. 260/264 in/ex advertised @ 0.006, 210/214 @50, 595/598 lift, 108 lsa, 104 icl.
I am very interested in this grind for my truck 6.0, though i wonder about valvetrain life expectancy with the short duration/ high lift design.

JodyB
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Re: 6.0 ls camshaft opinions

Post by JodyB » Tue Dec 11, 2018 9:03 pm

https://www.blocklayer.com/rpm-geareng.aspx

Here's a neat calculator for determining rpm vs mph, and shift rpm vs next gear rpm. Pretty neat tool to isolate the critical rpms for acceleration vs transmission gearing.

gruntguru
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Re: 6.0 ls camshaft opinions

Post by gruntguru » Tue Dec 11, 2018 11:07 pm

Yet another calculator with no metric option. :?

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Re: 6.0 ls camshaft opinions

Post by MadBill » Wed Dec 12, 2018 12:19 am

Yes, the R.O.T.W. (rest of the world) loses out again. Fortunately Liberia and Myanmar are OK. #-o
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Re: 6.0 ls camshaft opinions

Post by CamKing » Wed Dec 12, 2018 9:50 am

gruntguru wrote:
Tue Dec 11, 2018 11:07 pm
Yet another calculator with no metric option. :?
Converting, would be just too hard.
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Re: 6.0 ls camshaft opinions

Post by In-Tech » Wed Dec 12, 2018 10:58 am

Don't ya love happy dyno's? The stock 6L made ~425hp :lol: Just tools and it does show the increase.
Here's a dyno plot of a bone stock 2008 5.3L pulled from the junkyard, it was rated at 315hp and that was exactly what it made. Pulled the heads on the first cam change to install valve springs and put LS7 lifters in and a quick .003-.005" cut on the heads. I was pretty tired after 5 cam changes and 3 intakes per cam change so I didn't worry about fixing the fuel curve that caused the dip below 4500 :? . It's my "hotrod" cam kit. :)
Dyno_5_3L.JPG
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Heat is energy, energy is horsepower...but you gotta control the heat.
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Re: 6.0 ls camshaft opinions

Post by In-Tech » Wed Dec 12, 2018 11:14 am

Just saw a post from Madbill where he wants to see it pulled 500rpm past peak. My poor little junkyard 5.3L, but I did it anyway that day. :mrgreen: Those long runner intakes fall off hard after 6000.
Dyno_5_3L_7100rpm.JPG
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Heat is energy, energy is horsepower...but you gotta control the heat.
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Re: 6.0 ls camshaft opinions

Post by Newold1 » Wed Dec 12, 2018 11:46 am

JodyB

Are you playing here or will you please indicate why your are talking about shifting a pretty mild 6.0L at 6000rpms in what sounds like a street driven truck? :?:

Readers want to know!
The Older I Get, The Dumber I Get :wink:

JodyB
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Re: 6.0 ls camshaft opinions

Post by JodyB » Wed Dec 12, 2018 9:32 pm

Post Sat Dec 08, 2018 4:03 pm

Hi all!! I have a 2000 chevy 1500 4x4. 4L60 trans with 2500 converter, 3.42 gears, and stock size tires. Probably 5000 pounds or so. Building a 6.0 to replace the 5.3 and looking for all the midrange torque possible with a 6000rpm shift. Trailblazer ss style truck intake, 799 cathedral port heads(similar to ls6 243 heads), 10.3:1 cr, long tube headers, low restriction inlet and ex systems. I'm really leaning towards something in the 200-205 intake, 205-210 ex at 50 to shoot for a 55-5800 peak. Maybe on a 108-110 lsa to get all the midrange torque possible? A rough idle is acceptable, and i have software to tune it. Any thoughts or opinions?

Post Sun Dec 09, 2018 5:06 pm

Thankyou for the advice and experience guys. The ideas pointing me towards a small cam are 5000ish lbs, 3.42 gears, 2500 converter, 6000rpm shift, and the wide gear ratios of a 4l60.
My research of 5.7 and 6.0 ls engines with headers and low restriction inlet&exhaust seems to indicate cams with over 210 at 50 intake duration begin to push the hp peak to 6000-6200ish rpm, sacrificing some useful low rpm torque. Though most are using a fairly retarded 114ish Intake centerline.

I'm not sure what I left out Newold1.

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