03-26-2020, 03:21 PM | #57 |
Drives: 6th gen Join Date: Aug 2013
Location: US
Posts: 3,664
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Attentive? Isnt this advise free? No need to get shitty with ppl
Even after reading through it, I have no clue what your referencing. What coils? Back to my question, when you swept the cam did you do it on the street looking at vacuum and ve or was that done on the dyno. Old man yes dcr increase, but just wondering if the cam isn’t advanced enough down low
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‘22 2SS 1LE M6 Summit White - RF, Flexfuel, LT2 intake, 95mm tb, ATI udp, VT ramair, full 28” dragpack - 11.68@122
‘16 1SS M6 LT2 intake + boltons on DR 11.0@126+ (Sold) Last edited by 6spdhyperblue; 03-26-2020 at 03:38 PM. |
03-26-2020, 10:58 PM | #58 | |
Drives: 2017 C7 GS M7 / 2017 Camaro SS 1LE Join Date: Dec 2016
Location: Idaho
Posts: 198
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Quote:
In fact I have also no clue about your question.I'm still learning English after the 3 years I spent in the US. On the dyno and on the road, the full rpm range was used for the calibration MAF and VE. On the dyno the rpm sources was taken from one of my ignition coil. I checked synchronisation between rpm read by the dyno and HP tuners and they were showing the same. Am I correct the "swept the cam" means running it across the whole rpm range ? If yes I've done it dozens of time, MAF only mode and VE only mode looking at MAP/Baro. Don't really understand the point of your question |
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03-27-2020, 03:25 AM | #59 |
Drives: 6th gen Join Date: Aug 2013
Location: US
Posts: 3,664
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I mean what phaser lockout was installed. 0* 4* etc
Then if you have 4* for instance, you would check the different cam angles and see what angle makes power at what rpm.
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‘22 2SS 1LE M6 Summit White - RF, Flexfuel, LT2 intake, 95mm tb, ATI udp, VT ramair, full 28” dragpack - 11.68@122
‘16 1SS M6 LT2 intake + boltons on DR 11.0@126+ (Sold) |
03-27-2020, 08:52 AM | #60 |
Drives: 2017 C7 GS M7 / 2017 Camaro SS 1LE Join Date: Dec 2016
Location: Idaho
Posts: 198
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My phaser lockout is a 0 deg. No movment of the phaser possible at all. And all VVT stuff has been disabled in hp tuners
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03-27-2020, 10:12 PM | #61 | |
Drives: 2017 C7 GS M7 / 2017 Camaro SS 1LE Join Date: Dec 2016
Location: Idaho
Posts: 198
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Quote:
Do you have any reference videos for porting the MSD ? I can't find anything so far.. |
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03-28-2020, 12:52 AM | #62 |
Drives: 2017 C7 GS M7 / 2017 Camaro SS 1LE Join Date: Dec 2016
Location: Idaho
Posts: 198
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Tonight, I put the stock intake manifold of my 1LE on the GS, in lieu of the MSD. Just to test. I'll see tomorrow what is does.
Shame I had to take it on the camaro, but I dumped the OEM one on the C7...Gave me the opportunity to see the carbon build up at 22,000 miles...not so great on the valves, but not too bad either. |
03-28-2020, 04:42 PM | #63 |
Drives: 2017 C7 GS M7 / 2017 Camaro SS 1LE Join Date: Dec 2016
Location: Idaho
Posts: 198
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Definitely an improvement with the stock IM and TB in the 3000-4000 range. Cylinder Airmass at 0.74-0.76g in this range, instead of 0.68-0.72g. At 3800 rpm MSD 0.69g OEM IM 0.74g. MAF shows around 195g/s at 3800 on stock IM vs 170g/s with the MSD.
On the top the MSD works a little better. I would say stock IM is better to drive with my current setup. |
03-29-2020, 10:10 AM | #64 |
Drives: 2017 C7 GS M7 / 2017 Camaro SS 1LE Join Date: Dec 2016
Location: Idaho
Posts: 198
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Guys,
Airmass comparison between stock IM/Stock TB vs MSD (slightly ported)/87mm ported TB Stock TB/IM is better all the way to 5800 rpm. You can see that even stock IM/TB struggles a little from 3400-4000 |
03-29-2020, 11:38 AM | #65 |
Drives: 2017 C7 GS M7 / 2017 Camaro SS 1LE Join Date: Dec 2016
Location: Idaho
Posts: 198
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More data with the FBO data
This matches the dyno almost exactly. All data at 2800-3000Ft elevation With my heads and MSD the cam makes more power starting 5200 rpm, which the airmass shows. The biggest torque difference is 4000 rpm, airmass shows the same. The stock IM diminish by half the torque loss, but clearly makes less power than the MSD up top, by 4-5% Clearly Airmass is a good indicator of the power What is weird is from 3000-3400 the TSP makes more or less the same torque than OEM then falls off from 3400-4200 rpm. I clearly want to try the ported heads. Last edited by Nabush; 03-29-2020 at 11:54 AM. |
03-30-2020, 02:43 PM | #66 |
Drives: 2017 C7 GS M7 / 2017 Camaro SS 1LE Join Date: Dec 2016
Location: Idaho
Posts: 198
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I forgot to mention that I ported ported my MSD myself this WE. Airmass was 0.01-0.03g better than from the dyno run in the affect range, and it seems I got it all the way up. Cars really pulls great in the 5000-7000rpm range, way better than stock cam.
The 3500-4000 range is still annoying though in the mountain roads. I also ordered TSP Ported heads yesterday. I asked minimal skimming of the heads as I don't want to risk any PTV clearance issue Hopefully this will help with my mid range. Probably will try a 95mm TB next. |
04-01-2020, 03:53 PM | #67 |
Drives: 2017 C7 GS M7 / 2017 Camaro SS 1LE Join Date: Dec 2016
Location: Idaho
Posts: 198
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Ordered a Soler 95mm Ported TB with the 95 to 103mm adapter.
If I receive it before the heads I'll give it a try first. |
04-01-2020, 05:40 PM | #68 |
Drives: '18 1SS 1LE Join Date: Sep 2017
Location: Pennsyltucky
Posts: 2,569
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You are doing an outstanding job, better than most people posting on the internet. Good luck with your issue. Years ago a big cam would always kill your low to mid range power. One of the many reasons I've not changed a cam on my last few cars. People claim you can tune the loss of power out, but I think that only masks the loss of midrange torque.
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'18 1SS 1LE Black, PDR
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04-04-2020, 07:52 PM | #69 |
Drives: 2017 C7 GS M7 / 2017 Camaro SS 1LE Join Date: Dec 2016
Location: Idaho
Posts: 198
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So guys FYI
Soler 95MM LT5 Ported TB installed today No change at all in the problem area This ported TB drives great though, very good response. I calculated max area at 5600mm2 seems to work fine I really hope the heads are the issue and the ported ones I bought will solve my issues. If it not that, I am lost Recap of current mods : - AFE CAI - Soler 95mm Ported TB - MSD Intake Manifold (home ported) - TSP Stage 3 VVT cam with all supporting mods (Morel hydraulic Lifters/PAC Dual valve springs/Titanium retainers/Chromoly 7.850 pushrods/C5R timing chain/Trunion upgrade/DOD delete/32% fuel lobe with lash cap) - ARH LT headers - Catted X pipe Waiting on Ported TSP Heads. What is crazy is that stock IM/Stock TB in my test last week moved the RPM band 500 rpm lower (4500+ instead of 5000+) but still has the gap between 3500-4100. |
04-16-2020, 10:51 PM | #70 |
Drives: 2017 C7 GS M7 / 2017 Camaro SS 1LE Join Date: Dec 2016
Location: Idaho
Posts: 198
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Update :
- Heads installed and tested along with the 95mm Soler TB - Pulls like a bear up top - Torque comes sooner and airmass goes 5% higher most of the rpm range - Still this FUC*** dip of torque between 3500-4100 - An experienced professional tuner gave me a tune from a similar setup to test to see if the issue was coming from my homemade tune : still the same. I was expecting that. In a sense it means I'm not completely off doing my tune myself I'm lost. some pictures of the new cylinder Airmass and estimated power curve when comparing airmass on the 508HP dyno pull Volumetric efficiency calculation Power curve with Soler's 95mm Ported TB + Ported 360 CFM heads vs Katech ported 87mm TB + OEM heads For a trial I tried to put the OEM intake, It does not fit on the 95mm TB....I don't think removing the cats on the X pipe or going 2" headers instead of my current 1" 7/8 will change anything ?? |
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