08-06-2022, 03:46 PM | #15 |
Shifts under load
Drives: 2020 Camaro 1SS 1LE rally green Join Date: Apr 2017
Location: Fuquay-Varina, NC
Posts: 1,295
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I just had Prodigy/Pray install 2" TSP with off road connections and it is stupid loud on start up even in tour mode. Like others have said, after that, it gets quieter. But in sport/track mode it is quite loud on the gas. Sounds good, but easily exceeds any track ordinance for DB level. Mine is also hitting the steering shaft and I noticed they didn't install the button head bolt that came with them from TSP, so gotta go back and get that taken care of. I know PP doesn't recommend cats (may even refuse them), but I think on a bolt on car they won't be an issue and dramatically quiet it down. I guess I could go with some Vibrant resonators. So far my neighbors directly behind my garage haven't complained and I leave for work at 6:30 am
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08-08-2022, 06:01 PM | #16 |
Drives: '20 SS/1LE Join Date: Jul 2020
Location: Lafayette,Indiana
Posts: 34
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I'm no tuning expert but if you need a tune to run long tubes and cold starts are so loud is it possible to just not make it cold start? isn't the cold start just dumping extra fuel in to help warm up the cats? or is this not something you can tune out lol. don't laugh at this to hard because Ive never tuned anything.
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08-08-2022, 09:00 PM | #17 |
Drives: 18 ZL1 - M6 Join Date: Mar 2019
Location: MI
Posts: 438
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Okay, for all those that have 2” headers installed, are there issues “after” they’re installed with hitting the steering column? I knew that the column /shaft has to be disassembled during installation, but I’ve not heard of issues once everything was installed. Any help / clarification is greatly appreciated. Thanks all
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08-09-2022, 04:18 AM | #18 |
Drives: 2020 LT1 Join Date: May 2020
Location: WA
Posts: 75
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I've never heard of a break in period for headers lol.
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08-09-2022, 05:29 AM | #19 | |
Drives: like an old lady Join Date: Jun 2012
Location: indiana
Posts: 2,394
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Quote:
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08-09-2022, 09:27 AM | #20 |
Drives: 2020 LT1 Join Date: May 2020
Location: WA
Posts: 75
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I have speed engineering 1 7/8 headers and xpipe, no cats, and 3 inch pipes back to Borla atak mufflers. It's obnoxiously loud. With the valves open its basically straight piped. It's raspy and does not sound particularly good. I'm adding a straight through glasspack and steel mesh packed resonator to each side this week. Hopefully that will tone it down just a little and take out the raspy.
If you do go with headers, do yourself a favor and get some heat resistant boots to cover your plug wires at a bare minimum. I added a heat shield to my headers on both sides and haven't had any issues. The stock headers have heat shields, I don't know why people think they can run without them and not have problems.
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08-09-2022, 09:44 AM | #21 | |
Drives: E92 BMW M3 Join Date: Oct 2012
Location: Houston
Posts: 4,496
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Quote:
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SOLD - 2013 1LE - Pat G Spec'd Cam, NPP with 1 7/8" Long Tube Headers with High Flow Cats, Intake w/scoop, Ported Throttle Body, and Apex 1.25" Lowering Springs.
J-Rod Built and Matt@FSP Tuned |
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08-09-2022, 05:34 PM | #22 |
Drives: '20 SS/1LE Join Date: Jul 2020
Location: Lafayette,Indiana
Posts: 34
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found a vid from haltech that explains why there is a cold start.https://www.google.com/search?q=tuni...XN9AP1-r-oBg13
basically it has to do with the temp of the engine or lack of it. you need to spray more fuel than normal to make sure some finds the spark plug even if its a liquid it will burn when it fires and start the burn. when the engine is hot the fuel hits its distillation temp almost instantly and turns to a vapor that only needs a spark to ignite. looks like were probably stuck with it .. |
08-09-2022, 07:28 PM | #23 |
Drives: like an old lady Join Date: Jun 2012
Location: indiana
Posts: 2,394
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i'm 99% sure it is for heating the cats up and cannot be modified. some kind of dual pulse ignition stuff.
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2016+ camaro: everyone’s first car
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08-09-2022, 07:34 PM | #24 |
Drives: 2019 Camaro 2SS Join Date: Aug 2020
Location: McCordsville, Indiana
Posts: 621
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Idk if the actual cold start can be modified, but you can shut the valves in the tune so it at least tames it a bit. I have the valves shut on cold start in touring mode.
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2019 Shock 2SS A10. 2650@10psi/LPE HPFP/XDI+30/LT4 LPFP+JMS/Soler 95mm/Rotofab, E65, CSP 2” Headers/GESI GenII Cats. MM Wild/GM SG3 suspension/1LE Brakes, Velgen VF5 Wheels/GY SC3. JRE Tuned.
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08-09-2022, 07:41 PM | #25 |
Drives: 2021 LT1 10 speed auto Join Date: May 2013
Location: Connecticut
Posts: 2,343
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headers have to be worth 15 to 20 rear wheel horses when tuned properly imo.
Last edited by lt4camaro; 08-09-2022 at 07:53 PM. |
08-09-2022, 07:47 PM | #26 |
Drives: '20 SS/1LE Join Date: Jul 2020
Location: Lafayette,Indiana
Posts: 34
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The cold start doesn't really bother me anyway. my plan for my car is a american racing 1-7/8" long system with cats into the stock npp exhaust and a un-ported lt2 with a rotofab maybe flex-fuel. Im probably gonna call it done after that?
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08-09-2022, 07:49 PM | #27 |
Drives: like an old lady Join Date: Jun 2012
Location: indiana
Posts: 2,394
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i think the hp gain comes from deleting the cats. some of the fastest bolt on cars in the country that tracked their progress with mods showed very little, if any, gain from adding headers to a car that already had the cats deleted. gray area for sure.
i think 6spdhyperblue is onto something with them benefiting m6 cars more.
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2016+ camaro: everyone’s first car
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08-09-2022, 07:59 PM | #28 | |
Drives: 2021 LT1 10 speed auto Join Date: May 2013
Location: Connecticut
Posts: 2,343
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