LS2 Summit Cam Help
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Teching In
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LS2 Summit Cam Help Old song new verse…. Got a 71 Camaro with 07 LS2 and manual tranny from CTS-V. 4.10 gears. Long tubes, intake etc.
This is a fun car that needs to sound more like a hot rod and of course more power! No power adders expected in the future. Maybe just heads and intake down the road. Stock heads right now.
looking at summit Pro LS stage 2 or 3. Recommendations?
Also I’m thinking that this is a single bolt cam stock? What timing gear do I need to get for the the new 3 bolt?
This is a fun car that needs to sound more like a hot rod and of course more power! No power adders expected in the future. Maybe just heads and intake down the road. Stock heads right now.
looking at summit Pro LS stage 2 or 3. Recommendations?
Also I’m thinking that this is a single bolt cam stock? What timing gear do I need to get for the the new 3 bolt?
I'd check out Vengeance Racing's Kaotik ground by Cam Motion if that's what your after it's their #1 cam for LS2's. It works great for LS3's as well and should be an even sweeter cam with ported heads.
VR Kaotik 235/243 .621"/.624" 113+2 LSA
VR Kaotik 235/243 .621"/.624" 113+2 LSA
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I would bet yours is 1-bolt. Switching to a 3-bolt cam is no problem as long as you get the 4x sprocket for a 3-bolt cam.
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I think you'd like their Stage 3 Extra Clearance SUM-8710R1. Will work well with the LS2 compression, manual trans, and 4.10s for street driving. Will definitely not sound stock! And gives you room if you need to mill the heads to true them or if you want more compression when you decide to have them re-worked.
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A friend of mine had the Vengeance racing Kaotik cam mentioned above in his C6 Grand Sport, that was one of the nastiest sounding cams I've ever heard in a street car, it performed pretty well too.
Summit Stage 2 Pro LS Cam. 226/238 113+3, .600/.600 Lift SUM-8707 is a good cam for sure.
In my experience & opinion the 226 intake duration is right about right for an optimized stock cube 346 LS1/LS6. Above ~228 degree intake duration the torque curve starts to shift to the right. A lot of the hard-core LS1 folks used to run 231/236 cams that worked well.
Based on description desired results for the LS2, the SUM-8707 is toward the smaller side on intake duration in my opinion. With a 360 cube LS2 the intake duration can go up a little bit.
Of course a lot of cam selection is personal taste etc.
In my experience & opinion the 226 intake duration is right about right for an optimized stock cube 346 LS1/LS6. Above ~228 degree intake duration the torque curve starts to shift to the right. A lot of the hard-core LS1 folks used to run 231/236 cams that worked well.
Based on description desired results for the LS2, the SUM-8707 is toward the smaller side on intake duration in my opinion. With a 360 cube LS2 the intake duration can go up a little bit.
Of course a lot of cam selection is personal taste etc.
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I should add, if you plan on lugging it below 2k on the highway @ cruise, the Stage 2 would probably be the better choice. And if you're not willing to spin it past 6500rpm, that'd be another reason to stick with the lessor of the two. Really depends on how you plan to drive it.
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Teching In
Joined: Oct 2020
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Thanks again. Especially for the compliments on the car. Wish I had built up the motor before finishing the car! But that’s where I’m at.
where I live we cruise about 2100-2350 rpm on the highway and definitely expect to spin 6500+. I think I’m going to try the 8710 cam. It’s a little less than some more than the stage 2. Will get a little more sound and I like the idea of a little room to get some compression. I’ve built old school but this is my first LS. Should be fun to see how it wakes up.
where I live we cruise about 2100-2350 rpm on the highway and definitely expect to spin 6500+. I think I’m going to try the 8710 cam. It’s a little less than some more than the stage 2. Will get a little more sound and I like the idea of a little room to get some compression. I’ve built old school but this is my first LS. Should be fun to see how it wakes up.
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A 226/238 cam would work great. Good for some spray as well. I wouldn't go in the mid to high 230s at .050 in a pure street car. Or if you want a car with ***** and you are serious and want to cut some good ETs, I would forgo the hyd roller and put a good ls3 head on it with lighter valves, good rockers, a high ram intake and solid roller cam. Probably 24x/25x 110 or 108 range. It's easy enough to work in that engine bay and adjust lash every so often. But it will drive like crap. Pick your poison.
Don't kill yourself over 5 degrees here or there, call an expert and let us know what you end up with and results.
You running efi or carbs?
Don't kill yourself over 5 degrees here or there, call an expert and let us know what you end up with and results.
You running efi or carbs?
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ok so you can't go too big because pistons will kiss valves. I would run something in the ballpark of a 228/232 on a 112 or smaller
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The stage 3 appears to be tailored for the max effort stock bottom end builds.
235/242
234/242
234/243
236/244
etc lol
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OP,
That's a beautiful 71' Camaro you have there.
Regarding cams for this combo and your goals. We like either of the Pro LS cams that have been mentioned. Either way you go we think you'll be happy with the results.
The Pro LS stage 2 SUM-8707R1 with specs of .600/.600, 226/238, 113+3 with 6* of overlap. Maybe a tick on the small side but would get you a steady lope and be easy to get along with. It won't have a problem stretching out to 7,000+ with .600" lift beehives. We have the Trickflow by PAC TFS-1618-16 beehives. As an upgrade we offer the TFS-2500286P .660" lift duals.
We know customers like to have an idea of what a cam may sound like. Here's an example of the 8707R1.
The Pro LS stage 3 extra clearance SUM-8710R1. This has specs of .625/.605, 230/242, 113+3 with 10* of overlap. Designed with rec port heads in mind to allow a slight mill and PTV clearance with the large 2.165" intake valve. However, we have plenty of folks using this with cathedral port 6.0 and even 5.7 applications. We like the valve events of the 8710R1 for what you're looking for out of a cam. The six-speed and 4.10 gears will work well with this cam. This would pretty much put you in dual spring territory. Those same .660" lift springs listed above will work well with the 8710R1.
Here's an example of the 8710R1 idle.
Regardless of the aftermarket 3 bolt cam, you'll need a 3 bolt 4X cam gear. We have the GM NAL-12586481 cam gear. You'll need bolts for the gear and mine as well put some ARP ARP-134-1003 bolts in it.
Let us know if we can be of any further assistance. We'll be happy to help!
That's a beautiful 71' Camaro you have there.
Regarding cams for this combo and your goals. We like either of the Pro LS cams that have been mentioned. Either way you go we think you'll be happy with the results.
The Pro LS stage 2 SUM-8707R1 with specs of .600/.600, 226/238, 113+3 with 6* of overlap. Maybe a tick on the small side but would get you a steady lope and be easy to get along with. It won't have a problem stretching out to 7,000+ with .600" lift beehives. We have the Trickflow by PAC TFS-1618-16 beehives. As an upgrade we offer the TFS-2500286P .660" lift duals.
We know customers like to have an idea of what a cam may sound like. Here's an example of the 8707R1.
The Pro LS stage 3 extra clearance SUM-8710R1. This has specs of .625/.605, 230/242, 113+3 with 10* of overlap. Designed with rec port heads in mind to allow a slight mill and PTV clearance with the large 2.165" intake valve. However, we have plenty of folks using this with cathedral port 6.0 and even 5.7 applications. We like the valve events of the 8710R1 for what you're looking for out of a cam. The six-speed and 4.10 gears will work well with this cam. This would pretty much put you in dual spring territory. Those same .660" lift springs listed above will work well with the 8710R1.
Here's an example of the 8710R1 idle.
Regardless of the aftermarket 3 bolt cam, you'll need a 3 bolt 4X cam gear. We have the GM NAL-12586481 cam gear. You'll need bolts for the gear and mine as well put some ARP ARP-134-1003 bolts in it.
Let us know if we can be of any further assistance. We'll be happy to help!
Thread Starter
Teching In
Joined: Oct 2020
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Thank your for the additional information. @Summit if you have a better recommendation I’m open to it.
The current gear is a 4:10. May eventually go to a 3.73 but it’s unlikely. Main thing is making some power and drive ability. I’ve had a some friends express concerns with larger cams being especially tough on a manual with with just stuttering below 2K in general street driving. Thoughts? Normally I er a little on the larger side but this is my first LS.
The current gear is a 4:10. May eventually go to a 3.73 but it’s unlikely. Main thing is making some power and drive ability. I’ve had a some friends express concerns with larger cams being especially tough on a manual with with just stuttering below 2K in general street driving. Thoughts? Normally I er a little on the larger side but this is my first LS.