I need cam help
Thread Starter
Teching In
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I need cam help I am building an 11:1CR 416 (LS3). It is going into my 2008 Pontiac G8 GT. I would like to be able to drive it to work on fair weather conditions.
So my search is for a streetable cam with good manners.
The cam I have in mind is a cam motion grind
232/246 @.050. .630/.612. 117.5LSA
2800 RPM torque converter 6L80
1 7/8 LT heaaders
GMPP PORTED HEADS
My concern is that this cam may have poor drivability
advise please
thank you
Chris
So my search is for a streetable cam with good manners.
The cam I have in mind is a cam motion grind
232/246 @.050. .630/.612. 117.5LSA
2800 RPM torque converter 6L80
1 7/8 LT heaaders
GMPP PORTED HEADS
My concern is that this cam may have poor drivability
advise please
thank you
Chris
I asked a similar question a few months back. I didn't tear into my LS3 because it's running too damn good to start over. Another 416 cam question - LS1TECH - Camaro and Firebird Forum Discussion
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From: Franconia, PA
I like these 2 for you:
https://briantooleyracing.com/btr-40...mshaft-v2.html
https://www.summitracing.com/parts/SUM-8711R1
https://briantooleyracing.com/btr-40...mshaft-v2.html
https://www.summitracing.com/parts/SUM-8711R1
On The Tree
Joined: Jun 2022
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From: Las Vegas, NV
I have the cam motion ls3 stage 3 high lift cam in a G8 GXP (LS3/TR6060) which has a similar LSA (less lift than your spec) and it idles pretty close to stock. I found setting the idle ~800 rpm keeps it very smooth compared to the occasional "gallop" near ~700-750 rpm.
Thread Starter
Teching In
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What do you guys recommend as a good overlap for my combination. The cam I am considering only has 4* of overlap.
does a lower overlap sacrifice horsepower as it increases drivability?
Thanks for your responses.
Chris
does a lower overlap sacrifice horsepower as it increases drivability?
Thanks for your responses.
Chris
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From: Franconia, PA
It doesn't sacrifice horsepower as horsepower is really the top end of the rpm range and high lsa cams do well up top generally. But they sacrifice low and mid range torque. Low and mid range torque are really what you use more on the street.
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From: Coast of San Mateo County Between Pacifica & HMB
My .02.
Your 232/246 117 Cam Motion is the best choice so far especially with a 2800 rpm torque converter and desire for good manners.
I would chat with Cam Motion about a 232/242 115*+3* with the same lifts.
A +10* exhaust split with a good exhaust system is plenty for a NA primarily street driven LS3 head combo up to 6500 rpm, and will allow a slight
narrowing of the LSA to bring in the low end a little crisper and still maintain excellent street manners.
Your 232/246 117 Cam Motion is the best choice so far especially with a 2800 rpm torque converter and desire for good manners.
I would chat with Cam Motion about a 232/242 115*+3* with the same lifts.
A +10* exhaust split with a good exhaust system is plenty for a NA primarily street driven LS3 head combo up to 6500 rpm, and will allow a slight
narrowing of the LSA to bring in the low end a little crisper and still maintain excellent street manners.
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Last edited by Abs; Apr 14, 2025 at 11:31 AM.
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The specs on that Cam Motion are for an LS7 using 1.8 ratio rockers. So if you're still using 1.7s, you'll lose 5.5% lift.
If you're calling them anyway, ask for a specialist that can recommend a custom camshaft. Be prepared with all the specs of your engine and vehicle.
If you're calling them anyway, ask for a specialist that can recommend a custom camshaft. Be prepared with all the specs of your engine and vehicle.
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From: Franconia, PA
They might come back with something like this. I really like these cam specs a lot:
https://cammotion.com/camshafts/torq...ectangle-port/
https://cammotion.com/camshafts/torq...ectangle-port/
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They might come back with something like this. I really like these cam specs a lot:
https://cammotion.com/camshafts/torq...ectangle-port/
https://cammotion.com/camshafts/torq...ectangle-port/
It's also very similar to Summits SUM-8708R1 Stage 3 232/242 113+3 .600/.600 or if additional PTV is needed their SUM-8710R1 Stage 3 Extra Clearance 230/242 113+3 .625/.605
Last edited by 68Formula; Apr 14, 2025 at 03:29 PM.
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From: Franconia, PA
That's a good-off-the-shelf choice for his setup.
It's also very similar to Summits SUM-8708R1 Stage 3 232/242 113+3 .600/.600 or if additional PTV is needed their SUM-8710R1 Stage 3 Extra Clearance 230/242 113+3 .625/.605
It's also very similar to Summits SUM-8708R1 Stage 3 232/242 113+3 .600/.600 or if additional PTV is needed their SUM-8710R1 Stage 3 Extra Clearance 230/242 113+3 .625/.605
If he wanted to go bigger, which i think he doesnt but i might, there's the 8711 at 234/248, .625, .605, 113.5+3.5. That would be a banger too in a 416ci stroker.
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8708 is more for cathedral parts I think since it's 600, .600. I also liked the 8710 for him with the higher lifts (.625 and .605). Maybe they call it extra clearance because it has slightly less duration? I always thought that was weird because the lifts are actually higher which would be less clearance lol.
If he wanted to go bigger, which i think he doesnt but i might, there's the 8711 at 234/248, .625, .605, 113.5+3.5. That would be a banger too in a 416ci stroker.
If he wanted to go bigger, which i think he doesnt but i might, there's the 8711 at 234/248, .625, .605, 113.5+3.5. That would be a banger too in a 416ci stroker.
Might sound odd, the PTV clearance is more dependent on the valve position relative to piston position. So the valve events is more a factor whether there's potential interference than the lift itself.
Last edited by 68Formula; Apr 14, 2025 at 09:43 PM.
Teching In
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Hi. I’m Recently had cam motion spec me a cam for 11:1 ls416 w/ tps cnc ported heads & ported/rodmod ls3 intake to TR6060. going in 71 nova. My request for extremely treatable no low idle stick shift surging And of course, like everybody all the power I can get out of it lol. Specs are 232/244 628/612 115 +3 has 8.2 overlap. Hoping it’s everything plus +/- 550wph Unfortunately it will be on street till next year I hope..just One old man in garage.
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From: Franconia, PA
Hi. I’m Recently had cam motion spec me a cam for 11:1 ls416 w/ tps cnc ported heads & ported/rodmod ls3 intake to TR6060. going in 71 nova. My request for extremely treatable no low idle stick shift surging And of course, like everybody all the power I can get out of it lol. Specs are 232/244 628/612 115 +3 has 8.2 overlap. Hoping it’s everything plus +/- 550wph Unfortunately it will be on street till next year I hope..just One old man in garage.