LS3 Cam TEST in GM High Tech

[1GXP4ME]

GM High tech tested 10 different cams including the stock LS3 cam w/ LSA fom the stock 117.5 to 111.6 from comp cams and overlap of -12 stock to 12.1 on Lunati cam, the highest HP cam was the Livernois L92 Stage 2R MAXX

LSA 114

INT @ 50 236
INT valve Lift 0.597
EXH @ 50 248
Exh valve lift 0.598
Ovelap 10.5

Map@idle 56

base hp 483
after cam 552

base tq 471
after cam 492

But the cam that impressed me the most and thought it may be similar specs to their Stealth cam was a Lingenfelter Cam

PN:
GT11 L210065297

LSA 117.3

INT @ 50 215
INT valve Lift 0.628
EXH @ 50 232
Exh valve lift 0.641
Ovelap -11.0



Map@idle 37

base hp 483
after cam 533

base tq 471
after cam 493

I was thinking w/ the near stock LSA and Overlap but high valve lift the cam shoul sound nice and deliver good street driving manners.

[Mike P]

Nice.....


...

[AUGAH]

Thanks for the info, CAM is the next mod for me and I have just started investigating. Looking for the horsepower but maintaining the drivability as she is a daily driver.

[1GXP4ME]

The lingenfelter cam matched the TQ of the Livernois cam made about 20 less peak hp, BUT made more hp than the Livernois cam from 3000-6000

[1GXP4ME]

with the same peak tq and more hp from 3000-6000 I think it would be a drivers race @ the track but the Lingenfelter cam should be much more streetable. Any thoughts?

[sstolen]

i also saw the article and loved it. one of the best ive ever seen and i was glad to see an updated version of the cheatr cam from thunder racing in there since thats what i had in my 00 z28, total sleeper and i noticed it was really close to the lingenfelter cam you liked too.

both seem like great cams.

i did notice that at the end of the article there was a comment from MAST about how the cam they put in was really an l76 cam and not an ls3 cam and that they can do more with ls3 cams based on the type of valves used in ls3 heads and the difference between the valves used in our heads.

got me a little concerned on some of the high lift fast ramp rate cams that were on the list like the lingenfelter and the thunder racing cheatr

i was a little suprised at how livernois sent that cam as a "streetable" cam when i would have thought the stage 1 or stage 1c would have been A LOT more street able. just wouldnt have made the bragging rights power these made.

either way. great test and i wish GMHTP would have done this for the ls1 and ls2 back in the day....not everyone wants a car that barely idles under 1500rpm and peak power isnt everyones only concern.

would have been nice to compare them all with stock manifolds instead of longtubes too since the lingenfelter and cheatr were designed for stock manifolds, obviously they do well in both formats but i wonder how well some of the others would have done without the headers.

[1GXP4ME]

I didnot see that part I have the LS3 so I would have to look in to that, just my thoughts over the other cams were I could deal w/ a slight lossin power over 6000 if the car still drove like a stocker.

[newman27]

I had a lifter fail and have been informed by the dealership that a new camshaft is also required. This provides an opportunity for an upgrade. Has anyone else replaced the stock G8 GT camshaft with the Lingenfelter GT11 camshaft that can provide a description of their experience? Stock lifters are being put back on the car. I could of course upgrade the springs, retainers, etc. if necessary. My primary interest is an increase in torque. If there are any alternative recommendations for a camshaft upgrade that is compatible with the stock lifters that would also be of help. Thanks!

[Crazy Paul]

(G8-GT) Stock lifters are being put back on the car.

I could of course upgrade the springs, retainers, etc. if necessary.

GT11 215/231 duration @ .050 lift - .631/.644 lift with 1.7 118.0 CL

Stock lifters and springs will die as soon as you take that cam out of the box.

[newman27]

GT11 215/231 duration @ .050 lift - .631/.644 lift with 1.7 118.0 CL

Stock lifters and springs will die as soon as you take that cam out of the box.

Ouch! OK, any alternatives to offer? There has to be a "mild upgrade" out there. Just looking for a nice little performance bump and exhaust note improvement - nothing crazy. Thanks!

[Crazy Paul]

The stock lifters for a G8-GT are 8 normal LS lifters and 8 AFM lifters.
To use those you really should be using an AFM cam.
Start looking at DOD or AFM cam upgrades.

[newman27]

The stock lifters for a G8-GT are 8 normal LS lifters and 8 AFM lifters.
To use those you really should be using an AFM cam.
Start looking at DOD or AFM cam upgrades.

OK Will do. I just got off the phone with the mechanic who also confirmed that the Lingenfelter GT11 would require the upgraded springs (which cost about as much as the camshaft). He then pointed me to the Lingenfelter GT2-3 (http://www.lingenfelter.com/mm5/merchant.mvc?Screen=PROD&Store_Code=LPE&Product_Code=L210085297&Category_Code=C31#.Uo_H4uLyDYU) as possible alternative. Any opinions on that one? Thanks for your replies! This isn't an area I know much (if anything) about so I am learning...

[Crazy Paul]

Any opinions on that one?
Yes, find a new mechanic who knows his stuff.

Max lift of stock L76 springs is 0.520"
Max recommended valve lift with AFM lifters is 0.560"
The Lingenfelter GT cams are not AFM cams....they are not suitable, and 90% of aftermarket cams are not suitable, to run on AFM lifters.

[Chewy]

There are plenty of good AFM cams out there. Stick with one of them. Personally, I'd dump AFM altogether and enjoy enhanced long term reliability.

[newman27]

...Personally, I'd dump AFM altogether and enjoy enhanced long term reliability.

I thought about this but the lifters are being included as a warranty replacement item. I'm getting all new lifters and the labor covered under warranty. Thus, I just want to slip in a camshaft upgrade into the mix for basically the cost of the camshaft and a tiny bit of labor that I will have to cover over and above the warranty work.

[GRRR8GT]

Do a search here for " DOD Hi-Lift Cam" and you'll find a few threads relating to a cam offered by New Era that might work for you if you could sneek in somewhat better than stock springs in.

[newman27]

Thanks all for your help thus far! I think I am just going to bite the bullet here and do the DOD Delete. The dealership is looking at the possibility of crediting me back for stock replacement parts I don't use. I think I've settled on the Lingenfelter DOD delete (http://marylandspeed.com/lingenfelter-dodafm-delete-kit-2007-gm-applications-including-l99-camaro-and-g8-gt-l200265307-p-3618.html) package and the Lingenfelter GT11 camshaft (http://marylandspeed.com/lingenfelter-gt11-camshaft-350383427-ls1-ls2-ls3-ls6-215231-631644-w-17-rocker-1180-cl-l210065297-p-2281.html) both from MarylandSpeed. If anyone has any comments / experience with this combination, all feedback is appreciated.

[Crazy Paul]

Lingenfelter DOD Delete kit includes:
1-L200175307 Three bolt cam conversion
1-2499225 LS3 lifters
1-12599296 LS3 valley cover
1-12600326 LS2 LS3 front timing cover
1-12585673 Front crankshaft seal
1-12633904 Timing cover gasket
8-11515758 Bolt M8 x 1.25 x 30, 10.9
1-11588712 Bolt, M6 x 1 x 20, 8.8
1-12627501 Camshaft position sensor harness
1-12591720 Camshaft position sensor
4-12595365 LS3 lifter guides
2-17800568 GM Head bolts

Red bits above you don't need for a G8 L76.
You will need longer pushrods, very decent aftermarket valve springs.

[newman27]

Lingenfelter DOD Delete kit includes:
1-L200175307 Three bolt cam conversion
1-2499225 LS3 lifters
1-12599296 LS3 valley cover
1-12600326 LS2 LS3 front timing cover
1-12585673 Front crankshaft seal
1-12633904 Timing cover gasket
8-11515758 Bolt M8 x 1.25 x 30, 10.9
1-11588712 Bolt, M6 x 1 x 20, 8.8
1-12627501 Camshaft position sensor harness
1-12591720 Camshaft position sensor
4-12595365 LS3 lifter guides
2-17800568 GM Head bolts

Red bits above you don't need for a G8 L76.
You will need longer pushrods, very decent aftermarket valve springs.

Thanks! How about these springs (http://marylandspeed.com/competition-cams-dual-valve-spring-set-of-16-max-lift-675-gm-lsx-engines-26926-16-p-4108.html)? That camshaft also states that upgraded "retainers" are needed. I don't see any retainers being offered separately on the MarylandSpeed website anyway. Any recommendations?

[STL_G8GT]

Thanks! How about these springs (http://marylandspeed.com/competition-cams-dual-valve-spring-set-of-16-max-lift-675-gm-lsx-engines-26926-16-p-4108.html)? That camshaft also states that upgraded "retainers" are needed. I don't see any retainers being offered separately on the MarylandSpeed website anyway. Any recommendations?

A simple beehive would do... Pac-1218 maybe?

[Crazy Paul]

Thanks! How about these springs (http://marylandspeed.com/competition-cams-dual-valve-spring-set-of-16-max-lift-675-gm-lsx-engines-26926-16-p-4108.html)? That camshaft also states that upgraded "retainers" are needed. I don't see any retainers being offered separately on the MarylandSpeed website anyway. Any recommendations?
http://marylandspeed.com/competition-cams-dual-valve-spring-and-titanium-retainer-kit-max-lift-675-gm-lsx-engines-26926ti-kit-p-4106.html


A simple beehive would do... Pac-1218 maybe?
NO.
Intake duration is quite short (215) and lift is juicy (.631).....on the heavy intake valve. That means you've got a heavy object accelerating and decellerating faster than usual......simply because it's got good distance to travel and return in a short (duration) amount of time.
Definately want good dual springs for this one.

[newman27]

Excellent help here - thanks! OK, I think the only open item I don't have in my cart at MarylandSpeed is the longer push-rods. I'm sitting just shy of $1,500 but the lure of (mostly) free labor is too much to pass up...

[Crazy Paul]

That Lingenfelter DOD kit is also missing the head gaskets.
7.425 will most likely be the length of pushrods required for that cam,with stock GM head gasket thickness and no head milling.

[STL_G8GT]

http://marylandspeed.com/competition-cams-dual-valve-spring-and-titanium-retainer-kit-max-lift-675-gm-lsx-engines-26926ti-kit-p-4106.html


NO.
Intake duration is quite short (215) and lift is juicy (.631).....on the heavy intake valve. That means you've got a heavy object accelerating and decellerating faster than usual......simply because it's got good distance to travel and return in a short (duration) amount of time.
Definately want good dual springs for this one.

Apologies, I missed where he was ditching DoD... Those would be fine for a DoD friendly cam installed while dealer replaced some internals.

But for above that, yes duals a good idea. Usually Patriot Golds are mentioned.

[jcmGT]

if you are shopping valve train, make sure you include Tooley Racing in comparisons. Highly regarded equipment. Give them a call, Brian is very approachable and gives recommendations easily understood.

[johnbell2]

the GT11 cam is a good excuse to go to hollow stem LS3 intake valves...

[768MPH]

Don't rule out the Lunati 219/223 .625/.625 112LSA (1800rpm-6400rpm) that Rick Crawford has had great success with.

[Phil@PnP Tech]

if you are shopping valve train, make sure you include Tooley Racing in comparisons. Highly regarded equipment. Give them a call, Brian is very approachable and gives recommendations easily understood.

This!

300 clams for a .660" lift duals, Ti retainers, locks, seals, and spring seats. I've heard good feedback regarding longevity on these springs with the heavier L76 intake valve and larger lift cams.

[jpG8GT]

That's the cam im gonna be using. Should be a real good DD cam on stock stall. Rick has good luck with that cam. I'm not making mine into a drag car so this should work well.

[newman27]

I ended up going with the Lingenfelter G11 cam (http://www.lingenfelter.com/mm5/merchant.mvc?Screen=PROD&Store_Code=LPE&Product_Code=L210065297&Category_Code=C31#.Up0iK-IpE7w) with their spring and retainer upgrade (http://www.lingenfelter.com/mm5/merchant.mvc?Screen=PROD&Store_Code=LPE&Product_Code=L230075897&Category_Code=C159#.Up0ip-IpE7w) and DOD delete kit (http://www.lingenfelter.com/mm5/merchant.mvc?Screen=PROD&Product_Code=L200265307&Store_Code=LPE&search=dod+delete&filter_cat=&PowerSearch_Begin_Only=&sort=&range_low=&range_high=#.Up0i2uIpE7w). I will report back once it's all installed.