Cam differance Efi vs carb
09-20-2010, 10:00 PM
#1
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Cam differance Efi vs carb I'm building a 6.0 carbed lsx 4l80e swap for my 68 Camaro and I was wondering what the cam differences are between an efi motor and a carbureted setup? I'm guessing the only real differance would be the lsa?
09-21-2010, 02:11 AM
#2
I'm not following you completely. I dont think that the LSA alone would determine much of anything. There are many more valve events that you would have to take into consideration as well. Are you asking what is more of an ideal cam profile for a carb'd motor over and efi?
09-21-2010, 09:06 AM
#3
Really depends on the intake manifold that you run. A dual plane will want different valve events than a single plane. Typically, the single plane intakes will want an earlier intake valve open and closing point than a long runner EFI intake. Single plane intakes with carbs will typical respond to more overlap as well. But just like with EFI, head flow and performance goals will skew the cam specs. Bottom line, there is no one-size fits all carbed cam rule.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
09-21-2010, 02:53 PM
#4
Really depends on the intake manifold that you run. A dual plane will want different valve events than a single plane. Typically, the single plane intakes will want an earlier intake valve open and closing point than a long runner EFI intake. Single plane intakes with carbs will typical respond to more overlap as well. But just like with EFI, head flow and performance goals will skew the cam specs. Bottom line, there is no one-size fits all carbed cam rule.
on same engine
09-21-2010, 06:09 PM
#5
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Really depends on the intake manifold that you run. A dual plane will want different valve events than a single plane. Typically, the single plane intakes will want an earlier intake valve open and closing point than a long runner EFI intake. Single plane intakes with carbs will typical respond to more overlap as well. But just like with EFI, head flow and performance goals will skew the cam specs. Bottom line, there is no one-size fits all carbed cam rule.
10-02-2010, 03:09 PM
#6
As far as generalizations go, I had a conversation via email with one of the tech guys at comp cams regarding carbed LS motors vs. EFI LS motors. Here is what he said:
"There is not much difference in selecting a cam for a EFI or Carbureted LSX engine. They still typically like a little wider LSA and typically either a 111 or 112 for a carb setup are best. This is completely dependant on application though of course."
"There is not much difference in selecting a cam for a EFI or Carbureted LSX engine. They still typically like a little wider LSA and typically either a 111 or 112 for a carb setup are best. This is completely dependant on application though of course."
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10-02-2010, 10:06 PM
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Contact Allan Futral @ Futral Motorsports, I told him what I planed on doing, what my heads flowed, gear i wanted to run and he made a custom ground cam to meet my goals, now just gotta get the damn thing to the track
60, cam, cams, carb, carbed, carbureted, difference, differences, efi, fourm, ls, ls1, ls1tech, motors, similarties
