08-20-2017, 12:02 PM | #141 |
Drives: 2017 SS 1LE Mosiac Black Join Date: Nov 2016
Location: DFW, TX
Posts: 1,132
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Pray, what are the specs on the stock cam?
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08-20-2017, 12:10 PM | #142 |
Drives: 2016 2SS Join Date: Jul 2016
Location: Sanford NC
Posts: 2,766
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From what I have been able to find it is 200/207 116.5+7. Which makes sense seeing that my cranking compression is 240psi. The math puts the stock DRC at 9.74. Again, with DI and VVT that makes sense also. with all of my previous LS engines I shoot for 8.8 DCR and that usually puts me right at 205-210psi cranking compression on a warm, broken in motor.
What I don't know is how well the cam phaser is working with just turning the motor over for a cranking compression test. It seems to be very steady on consistent for numbers though so it must have enough oil pressure to work. The only real odd thing to me with these motors is how much timing they take down low and the final timing curve to get these things to run the number.
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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, 12:48 PM | #143 | |
Drives: 2019 Camaro 1LE Shock Candy Join Date: Mar 2016
Location: Garage
Posts: 1,755
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Quote:
The gen 5 has a 50 degree swing VVT and the gen 6 has a 62 degree swing in VVT. The cam phaser I got limits it to 30 degrees now and is very stable. It idles pretty good with a bit of wave timing in it, not much but it's there. Timing for VVT is great. Never really thought about it till I started talking cam and extra power. VVT and direct injection!!! Big fan off both. AFM sucks, deleted that and plug holes to keep oil pressure up and oil pressure is great.
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LT4 1.7 Supercharger snout ported & Meth
103 Katech TB, KATECH Custom Heads 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 98 octane. 2014 Mini Cooper countryman S All4 M6 daily driver |
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08-20-2017, 12:57 PM | #144 |
Drives: 2019 Camaro 1LE Shock Candy Join Date: Mar 2016
Location: Garage
Posts: 1,755
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Converter is needed, I can tell tranny feels diff from the get go. Rear end, nothing planned yet, but rear end will need some thought.
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LT4 1.7 Supercharger snout ported & Meth
103 Katech TB, KATECH Custom Heads 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 98 octane. 2014 Mini Cooper countryman S All4 M6 daily driver |
08-20-2017, 01:08 PM | #145 | |
Drives: 2016 2SS Join Date: Jul 2016
Location: Sanford NC
Posts: 2,766
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Quote:
I am thinking about designing some "small" cams and using phasing to make up the top end and see how they do for the stock converter guys.
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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, 01:10 PM | #146 |
Drives: 2016 2SS Join Date: Jul 2016
Location: Sanford NC
Posts: 2,766
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A Circle D 4C will be your best friend Sir. I wouldn't worry about the rear. I think I have the 3rd quickest 60fts on the forums and the quickest N/A ones for sure with no real rear end issues that I can spot. But I change the rear end fluid when I change my engine oil.
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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, 03:42 PM | #147 |
Drives: 2017 Corvette Stingray Join Date: Nov 2016
Location: DFW, TX
Posts: 58
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Who does sniff tests in DFW on new cars? It's plug into the OBDII port and check for codes.
https://www.dps.texas.gov/rsd/vi/con...ionTesting.htm |
08-20-2017, 04:54 PM | #148 | |
Drives: 2017 SS 1LE Mosiac Black Join Date: Nov 2016
Location: DFW, TX
Posts: 1,132
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Quote:
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08-20-2017, 08:21 PM | #149 |
Drives: 2017 Corvette Stingray Join Date: Nov 2016
Location: DFW, TX
Posts: 58
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Yep. If on that linked page you click the link for OBDII testing, they explain exactly how what they look for.
https://www.dps.texas.gov/rsd/vi/Misc/faq/faq_obdii.htm |
08-22-2017, 12:57 PM | #150 |
Drives: 2016 2SS M6 Join Date: Oct 2016
Location: Wentzville MO
Posts: 50
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the dealer that did my install left the stock cam phaser in the car but did the DOD delete, should I have a limiter put in, or is it fine the way it is
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08-22-2017, 01:03 PM | #151 |
Drives: 2016 2SS M6 Join Date: Oct 2016
Location: Wentzville MO
Posts: 50
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I just made an appointment to get some dyno numbers on Thursday should be up on Friday. my setup is GMPP CNC Heads, Hot Cam, DOD delete with stock cam phaser. SW 1 7/8 LT with no cats and full SW exhaust without NPP. Car is a 6MT everything else is stock including the factory airbox.
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08-22-2017, 01:12 PM | #152 |
Drives: 2016 2SS Join Date: Jul 2016
Location: Sanford NC
Posts: 2,766
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They should have put a 25* limiter in it. Most guys are going with 0* or 4* max limiters with cams now. The spring pressure used with aftermarket cams overcomes the phaser sometimes and causes camshaft retarding against commanded. Who ever tuned your car should have done away with the driving retard and set up the WOT retard as GM prescribes for that cam. I guess you will be fine. Consider that the GM cam has 41* more exhaust duration than the stock cam. I would have to run some math to tell you how much later it closes. Not sure if the stock phaser retard + the extra duration will cause issues. I am assuming it hasn't so far.
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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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08-22-2017, 01:45 PM | #153 |
Drives: 2016 2SS M6 Join Date: Oct 2016
Location: Wentzville MO
Posts: 50
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I had an issue at around 10,000 miles after install where there was some lifter noise and they had to install new lifters and cam. it was all under warranty so they lived up to their promise but they never really figured out what the issue was,
the car has 16,000 on it now about 4,000 since the new cam so I guess I will keep an eye on it still have 20,000 miles left so no worries here. |
08-25-2017, 07:11 AM | #154 |
Drives: 2016 2SS M6 Join Date: Oct 2016
Location: Wentzville MO
Posts: 50
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so the car made 450 to the wheels kinda disappointed not sure if i need to do anything or just leave it alone i did not get a baseline pull before the work was done, but seems a little low compared to others here |
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