08-20-2017, 09:32 AM | #127 |
Drives: 2016 2SS Join Date: Jul 2016
Location: Sanford NC
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I noticed I gained tq and hp with the stock cam when I advanced it 2* or so and did some other custom cam timing tweeks. With the extra airflow it didn't need to "act" bigger than it was. The problem with just VVT is that the cam specs will always be what they are. You are just adjusting where the cam makes power. Notice also that the stock cam only has a 7* split.
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2016 2SS. H/C SBE 1.37 60ft, 6.36@109.49, 9.97@136+. Nuff Said.
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08-20-2017, 09:39 AM | #128 | |
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I have personally found the overlap sweet spot for engine displacements for power and being daily drivable are dependant on lobe sep as well. LS2 = 9*-11*, LS3 = 12*-15*, 416-427 19*-27*. I have never spec'd a cam with more than 113 lobe sep. EVER.
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2016 2SS. H/C SBE 1.37 60ft, 6.36@109.49, 9.97@136+. Nuff Said.
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08-20-2017, 10:01 AM | #129 | |
Drives: 2017 SS 1LE Mosiac Black Join Date: Nov 2016
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08-20-2017, 10:27 AM | #130 |
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I would guess only a couple degrees of overlap would pass. I am assuming you guys don't have visual then? No point in doing the cam if you don't do the intake and exhaust track as well. If you removed that stuff or wnt back to stock intake/exhaust the tune would need to be reworked.
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2016 2SS. H/C SBE 1.37 60ft, 6.36@109.49, 9.97@136+. Nuff Said.
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08-20-2017, 10:29 AM | #131 |
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I am sure there are 10 good shops in DFW that could answer your question if they are dealing with emissions as well.
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2016 2SS. H/C SBE 1.37 60ft, 6.36@109.49, 9.97@136+. Nuff Said.
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08-20-2017, 10:31 AM | #132 | |
Drives: 2017 SS 1LE Mosiac Black Join Date: Nov 2016
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08-20-2017, 10:40 AM | #133 |
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And to your question of the cam determining the power potential of an engine. In a word, no. All a cam does is process air, that's it. There are a ton of other factors that come into play. Airflow in and out and displacement are huge ones. Let's deal with air flow. Volume, velocity, swirl, tumble are a few things to consider. Valve size and C/D are another. C/D being the determine of efficiency most of the time. Basically a head with the smallest runner for the displacement with the most flow wins. The more efficient the heads the less duration you need to make the same power. But flow efficiency goes from air filter to muffler. There is also the factor of the entire lift curves airflow number. That means all the way up and down the lift curve for the intake and exhaust runners. Those also need to be flowed with your IM/TB and a chunk of your exhaust pipe to get accurate numbers. Once I have all of those numbers along with all the specs on the total car and it's intended purposes, then I design the cam.
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2016 2SS. H/C SBE 1.37 60ft, 6.36@109.49, 9.97@136+. Nuff Said.
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08-20-2017, 10:42 AM | #134 |
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Hmm, that would be an interesting challenge. Kind of a cool way to do it. I would go heads, tiny blower cam and a F1.
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2016 2SS. H/C SBE 1.37 60ft, 6.36@109.49, 9.97@136+. Nuff Said.
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08-20-2017, 11:04 AM | #135 | |
Drives: 2019 Camaro 1LE Shock Candy Join Date: Mar 2016
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Quote:
Yup, on the above comments. Air flow is what I want more of, next project to tweak my motor is larger TB. I made the mistake of ordering a 92 mm top on my tunnel ram. Ordering the 105 mm top with a 105mm Holley TB with mechanical attachment and will at some point change to cable throttle because I do not like the Camaro lag off the line even with a tune. After I get TB worked out with tune and is running right it wil be time to test out a NOS bracket in the tunnel ram for a max 150 shot. Looking to start that project late September. Then a meth/water injection and I think that pretty much completes my build.
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LT4 1.7 Supercharger snout ported & Meth
103 Katech TB, KATECH Custom Heads, DSX In-line fuel TSP Headers, Spec P Super Twin Clutch, TSP EL C7 CAM Diamond Piston & Manley Rods, Roto Fab Big Gulp BTR Push Rods,LS7 Lifters, ARP, FI Chiller, Kirkey Seats SJM Line Lock, Hurst Pistol Grip. 747/739 RWHP street tune - 821/794 RWHP track tune 101 octane. 2014 Mini Cooper countryman S All4 M6 daily driver |
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08-20-2017, 11:19 AM | #136 | |
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Quote:
If you tweak your driver demand and torque coefficient tables and your TB is ported correctly there shouldn't be any real noticeable lag. My honest opinion is that this combo is just going to be soft on the bottom no matter what you do. It should scream up top though. Launching from a roll at 5K should be a blast in 2nd and 3rd. When you switch to cable driven you are going to have to do a write up on everything that was needed. I am sure there are a lot of people that want to ditch the DBW.
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2016 2SS. H/C SBE 1.37 60ft, 6.36@109.49, 9.97@136+. Nuff Said.
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08-20-2017, 11:28 AM | #137 |
Drives: 2015 Tiger XCX,2016 Camaro 1SS,LBZ! Join Date: Sep 2015
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I wonder if this every got to a dyno? Really would like to see if the cnc heads and cams are worth the change?
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08-20-2017, 11:38 AM | #138 | |
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Quote:
It's not all about numbers, it's the complete package. I will base my build on final track numbers on the line, not a dyno .
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LT4 1.7 Supercharger snout ported & Meth
103 Katech TB, KATECH Custom Heads, DSX In-line fuel TSP Headers, Spec P Super Twin Clutch, TSP EL C7 CAM Diamond Piston & Manley Rods, Roto Fab Big Gulp BTR Push Rods,LS7 Lifters, ARP, FI Chiller, Kirkey Seats SJM Line Lock, Hurst Pistol Grip. 747/739 RWHP street tune - 821/794 RWHP track tune 101 octane. 2014 Mini Cooper countryman S All4 M6 daily driver |
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08-20-2017, 11:41 AM | #139 |
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With that in mind, will you be doing a converter and drag pack?
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2016 2SS. H/C SBE 1.37 60ft, 6.36@109.49, 9.97@136+. Nuff Said.
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08-20-2017, 11:50 AM | #140 |
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Here is what they flowed on my bench. The intake port flowed identical to stock. It must need more velocity to show out. Hopefully at 28" of depression they do a bit better. The exhaust port did pretty well at .4-.6.
http://www.camaro6.com/forums/showthread.php?t=503689 Here is the stock head vs. my head on my bench. http://www.camaro6.com/forums/showthread.php?t=483048 And my head vs. stock at 28". http://www.camaro6.com/forums/showthread.php?t=492595 As you can see there is a large jump from my bench to a 28" bench. So the GM head should do a bit better at 28". I just didn't have time to test it at that depression.
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2016 2SS. H/C SBE 1.37 60ft, 6.36@109.49, 9.97@136+. Nuff Said.
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