Cam Selection
BTW, I will throw a monkey wrench in your build and suggest this. Go with some 3.08 or 3.23 gears and do a BTR Stage 1 LS3 NA Cam and done. Will drive great, power everywhere, within 20hp of the Summit 8710 cam and it'll cruise at 90mph around 3000rpm. To me, that's perfect. Give it some thought. More rear gear= you have to cruise slower. I like going fast, I have stuff to do.
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BTW, I will throw a monkey wrench in your build and suggest this. Go with some 3.08 or 3.23 gears and do a BTR Stage 1 LS3 NA Cam and done. Will drive great, power everywhere, within 20hp of the Summit 8710 cam and it'll cruise at 90mph around 3000rpm. To me, that's perfect. Give it some thought. More rear gear= you have to cruise slower. I like going fast, I have stuff to do.
PSI springs max lift is .625” and the summit duals max lift is .600” so I would have to use the trick flow dual springs since their max lift is .600”. The summit cam lift is .625” int. and .605” exh. Could I use that with this cam? Not sure on any other brands for the LS applications.
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The drop in lifters are fine, I run Melling usually for cheap LS7 stuff. The good GM ones are $450 these days and the Johnson''s drop in's are like $800, but worth it. For spring kit I like the PSI 1511ML for beehives and the Summit duals are decent for the $$. PAC 1207x springs if you want to do it once and have some room later for 1.8 roller rockers(Comp Pro Mag Bolt ons, recommended).
Little Chopper LS Camshaft (222/232-108+3)
Duration at .050: 222/232108 Lobe Center Angle with a 105 Intake Centerline
Lift with 1.7 Rocker Arm Ratio: .595"/.587"
And for a thought of something bigger, 230/238 on either 110 or 108.
If you care about going fast, strongly suggest putting a single plane on it and rev the thing to 7500 you'll make over 500whp and go deep 10's.
Ok, then that narrows your options some. PAC 1207x springs for sure. The Spanks13 cam 230/238 or the old Spinmonster 230/234 on a 111lsa will both work great. I think the Spanks cam will make more torque.
And put a SINGLE PLANE on it like Spanks said. I was thinking it, but he said it first. 2in headers and a dual plane is bass-ackwards.
FYI, go back a couple pages on the forum, there is another guy with a serious Nova like yours doing and identical build, but with an auto. Lots of good info.
And put a SINGLE PLANE on it like Spanks said. I was thinking it, but he said it first. 2in headers and a dual plane is bass-ackwards.
FYI, go back a couple pages on the forum, there is another guy with a serious Nova like yours doing and identical build, but with an auto. Lots of good info.
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My man. I wrote back my suggestion was the
108 Lobe Center Angle with a 105 Intake Centerline
Lift with 1.7 Rocker Arm Ratio: .595"/.587"
And for a thought of something bigger, 230/238 on either 110 or 108.
If you care about going fast, strongly suggest putting a single plane on it and rev the thing to 7500 you'll make over 500whp and go deep 10's.
Little Chopper LS Camshaft (222/232-108+3)
Duration at .050: 222/232108 Lobe Center Angle with a 105 Intake Centerline
Lift with 1.7 Rocker Arm Ratio: .595"/.587"
And for a thought of something bigger, 230/238 on either 110 or 108.
If you care about going fast, strongly suggest putting a single plane on it and rev the thing to 7500 you'll make over 500whp and go deep 10's.
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Ok, then that narrows your options some. PAC 1207x springs for sure. The Spanks13 cam 230/238 or the old Spinmonster 230/234 on a 111lsa will both work great. I think the Spanks cam will make more torque.
And put a SINGLE PLANE on it like Spanks said. I was thinking it, but he said it first. 2in headers and a dual plane is bass-ackwards.
FYI, go back a couple pages on the forum, there is another guy with a serious Nova like yours doing and identical build, but with an auto. Lots of good info.
And put a SINGLE PLANE on it like Spanks said. I was thinking it, but he said it first. 2in headers and a dual plane is bass-ackwards.
FYI, go back a couple pages on the forum, there is another guy with a serious Nova like yours doing and identical build, but with an auto. Lots of good info.
LS's are a different animal and I know what you mean on the single vs dual on the street. I'll be honest, putting a carb on this is backwards, but if you have to do it, I understand. Go with a Vic Jr and do some light porting to it. It's not that the dual plane is horrible, but the LS3 head intake port just likes a single plane, direct shot intake. Those two go together like peanut butter/jelly. Yes, the stock long runner plastic intakes make more torque down low, but the single plane rocks once it's rolling. Port Injection(on the single plane) would make it better, fyi. With 10.5 compression(you are a point low, fyi) and it sounds like you have fly cut pistons by the conversation we are having, I would put an adj cam gear in it and play with the advance to get the powerband where you want it, once the base combo is build. I still like the original Summit 8710R1 w/ the 1.8 rockers and PAC 1207x springs for overall fastest combo. It'll have long legs and get busy almost anywhere in the powerband. For a street car tough to beat.
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LS's are a different animal and I know what you mean on the single vs dual on the street. I'll be honest, putting a carb on this is backwards, but if you have to do it, I understand. Go with a Vic Jr and do some light porting to it. It's not that the dual plane is horrible, but the LS3 head intake port just likes a single plane, direct shot intake. Those two go together like peanut butter/jelly. Yes, the stock long runner plastic intakes make more torque down low, but the single plane rocks once it's rolling. Port Injection(on the single plane) would make it better, fyi. With 10.5 compression(you are a point low, fyi) and it sounds like you have fly cut pistons by the conversation we are having, I would put an adj cam gear in it and play with the advance to get the powerband where you want it, once the base combo is build. I still like the original Summit 8710R1 w/ the 1.8 rockers and PAC 1207x springs for overall fastest combo. It'll have long legs and get busy almost anywhere in the powerband. For a street car tough to beat.
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LS's are a different animal and I know what you mean on the single vs dual on the street. I'll be honest, putting a carb on this is backwards, but if you have to do it, I understand. Go with a Vic Jr and do some light porting to it. It's not that the dual plane is horrible, but the LS3 head intake port just likes a single plane, direct shot intake. Those two go together like peanut butter/jelly. Yes, the stock long runner plastic intakes make more torque down low, but the single plane rocks once it's rolling. Port Injection(on the single plane) would make it better, fyi. With 10.5 compression(you are a point low, fyi) and it sounds like you have fly cut pistons by the conversation we are having, I would put an adj cam gear in it and play with the advance to get the powerband where you want it, once the base combo is build. I still like the original Summit 8710R1 w/ the 1.8 rockers and PAC 1207x springs for overall fastest combo. It'll have long legs and get busy almost anywhere in the powerband. For a street car tough to beat.
This test showed the power difference on a 6.0 only showed 10hp difference in peak hp. The curves were pretty interesting as well. Makes me lean more towards dual plane when I see articles like this.
For a carb setup, buy both and try them. It's a cheap enough test. The huge difference is you can port the single plane easily, porting a dual plane is harder to make it consistent/even, but not impossible.
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With the larger camshaft (especially with high overlap), use annular boosters rather than dogleg for improved fuel atomization and caburetor signal. It'll help the throttle response and low-end torque.
Edit: Here's a good article showing the potential: https://www.motortrend.com/how-to/carburetor-showdown/
Edit: Here's a good article showing the potential: https://www.motortrend.com/how-to/carburetor-showdown/
Thread Starter
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LS's are a different animal and I know what you mean on the single vs dual on the street. I'll be honest, putting a carb on this is backwards, but if you have to do it, I understand. Go with a Vic Jr and do some light porting to it. It's not that the dual plane is horrible, but the LS3 head intake port just likes a single plane, direct shot intake. Those two go together like peanut butter/jelly. Yes, the stock long runner plastic intakes make more torque down low, but the single plane rocks once it's rolling. Port Injection(on the single plane) would make it better, fyi. With 10.5 compression(you are a point low, fyi) and it sounds like you have fly cut pistons by the conversation we are having, I would put an adj cam gear in it and play with the advance to get the powerband where you want it, once the base combo is build. I still like the original Summit 8710R1 w/ the 1.8 rockers and PAC 1207x springs for overall fastest combo. It'll have long legs and get busy almost anywhere in the powerband. For a street car tough to beat.