07-09-2020, 12:07 PM | #7589 | |
Drives: 1SS, A8, MRC, NPP, Blade Spoiler Join Date: Jun 2010
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Quote:
https://www.roadandtrack.com/new-car...nalysis-specs/ From the article: "The catalytic converters are closer to the exhaust ports, helping to reduce cold-start emissions. The new catalysts allowed Chevy to increase exhaust valve lift by 1mm and duration by 18 degrees, for more exhaust flow." The Camaro's version of the LT1 already has Try-Y headers. Only the Covette has the manifold. And you will note that the Corvette has 5-10 more HP in it's version of the LT1, so the manifold may be better than the try-y's. BUT, I agree with your premise that small improvements in intake/exhaust, can boost output enough to justify an LT3. And I think with the Gen6 Camaro getting extended, and LT3 for Camaro would be a good possibility. But, Camaro won't get an LT2, and the LT3 (if it comes) will probably have a little less output than the LT2, but more than the LT1. 480 sounds right, and sounds great to me... |
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07-09-2020, 12:08 PM | #7590 |
Drives: 1SS, A8, MRC, NPP, Blade Spoiler Join Date: Jun 2010
Location: MD
Posts: 1,485
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07-09-2020, 12:13 PM | #7591 | |
Drives: 2021 LT1 10 speed auto Join Date: May 2013
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07-09-2020, 12:40 PM | #7592 | |
Drives: SS 6 speed of course Join Date: Jan 2016
Location: Hilo, HI
Posts: 4,316
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Quote:
Here is the C7 cat, it is hard bolted to a short runner manifold, so nope ain't buying the article. No surprise there.
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07-09-2020, 12:43 PM | #7593 | ||
Drives: SS 6 speed of course Join Date: Jan 2016
Location: Hilo, HI
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Quote:
Quote:
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Forged short block, large duration sub .600 lift Cam Motion cam, 7200 RPM fuel cut, Pray Ported Heads, 3.85 pulley D1X, stage II intercooler, DSX secondary low side, DSX E85 sensor, Lingenfelter big bore 2.0 pump, ported front cats, 60608 Borla, LT4 injectors, ZL1 1LE driveshaft and Katech ported TB, ported MSD intake, BTR valvetrain, ARP studs, ProFlow valves, PS4 tires.
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07-09-2020, 02:11 PM | #7594 | ||
Drives: 1SS, A8, MRC, NPP, Blade Spoiler Join Date: Jun 2010
Location: MD
Posts: 1,485
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Quote:
And, I never saw the 'vette cats, thanks for posting the picture. Looks like it is also a bit of a bottle neck, especially compared to the LT2. The more efficient the cats are isn't just for exhaust throughput though, the faster they heat up, the better cold start emissions are, and the more aggressive a cam you can run, which in turn gives you better performance. Of course, you need the right size plumbing to handle the bigger exhaust lobes on the cam, which Chevy did with the LT2 as well. Quote:
Oh yeah, and speaking of Chevy crate engines, have you seen the LS427/570? This is the first image Chevy released for the Gen6 Camaro, and it is the picture of it's tri-y header. |
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07-09-2020, 02:47 PM | #7595 |
Retired from GM
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Posts: 5,219
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This doesn't prove or disprove a next platform. The changes from LT1 to what I'm calling LT3 would not affect packaging at all. Block and head internals.
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07-09-2020, 03:19 PM | #7596 |
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Actually, the article does make sense if you look at it from the perspective of the LT1 being an engine developed for Corvette, adapted for use in Camaro. Just like the supercharger for ZL1 was sized to fit under the Z06 hood, even though a larger supercharger could easily fit under the ZL1 hood. LT1 was developed based on Corvette geography. LT3 wouldn’t have to live with that restriction.
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2017 CAMARO FIFTY SS CONVERTIBLE
A8 | MRC | NPP | Nav | HUD | GM Performance CAI | Tony Mamo LT1 V2 Ported TB | Kooks 1-7/8” LT Headers | FlexFuel Tune | Thinkware Q800 Pro front and rear dash cam | Charcoal Tint for Taillights and 3rd Brakelight | Orange and Carbon Fiber Bowties | 1LE Wheels in Gunmetal Gray | Carbon Fiber Interior Overlays | Novistretch bra and mirror covers | Tow hitch for bicycle rack | |
07-09-2020, 03:21 PM | #7597 |
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True, the CT5 Blackwing will be LT4. But it isn’t here yet, so LT4 is still a Camaro only engine until CT5 BW and Escalade BW.
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2017 CAMARO FIFTY SS CONVERTIBLE
A8 | MRC | NPP | Nav | HUD | GM Performance CAI | Tony Mamo LT1 V2 Ported TB | Kooks 1-7/8” LT Headers | FlexFuel Tune | Thinkware Q800 Pro front and rear dash cam | Charcoal Tint for Taillights and 3rd Brakelight | Orange and Carbon Fiber Bowties | 1LE Wheels in Gunmetal Gray | Carbon Fiber Interior Overlays | Novistretch bra and mirror covers | Tow hitch for bicycle rack | |
07-09-2020, 03:37 PM | #7598 |
Drives: SS 6 speed of course Join Date: Jan 2016
Location: Hilo, HI
Posts: 4,316
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yep,
Now to the 4 cats vs 2 cats. I'm 1000% sure an oval cat would easily fit in the Camaro and yield all the flow needed. But yeah the LT2 cats are HUGE and round and HUGE and straight and round and did I mention HUGE.
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Forged short block, large duration sub .600 lift Cam Motion cam, 7200 RPM fuel cut, Pray Ported Heads, 3.85 pulley D1X, stage II intercooler, DSX secondary low side, DSX E85 sensor, Lingenfelter big bore 2.0 pump, ported front cats, 60608 Borla, LT4 injectors, ZL1 1LE driveshaft and Katech ported TB, ported MSD intake, BTR valvetrain, ARP studs, ProFlow valves, PS4 tires.
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07-09-2020, 08:05 PM | #7599 |
Drives: '16 2SS / '05 SRT10 Ram / '65 bu Join Date: Dec 2015
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You're spot on homie. The face of the c8 cat is 6" and even though its an 800 cell unit, the 300 cell 4" face hi flows netted a minimal gain in comparison. Hats off to GM for such a free flowing unit.
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07-09-2020, 09:39 PM | #7600 |
Drives: The DSSV Twins: ZR2 and ZLE A10 Join Date: Oct 2019
Location: TX
Posts: 889
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I'm thinking there will be an LT1 or LT4 or both as options in the upcoming ZRX Silverado. LT1 to fight the raptor. LT4 to fight the TRX.
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07-09-2020, 10:43 PM | #7601 | |
Drives: 2018 Camaro SS 1LE Join Date: Aug 2018
Location: Tampa Florida
Posts: 1,980
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Quote:
480 isn't all that much but it's enough to garner my attention. Only caviot being that I assume it'll be hard to mod for some time if it has one of those tricky new ecu's.
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07-09-2020, 11:11 PM | #7602 |
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Why stop at 480 tho? GM has shown that they're not above giving the Camaro every bit of power that the Vette has. They would have to actually spend resources turning it back. It would be stupid. Just send it. Throw all 490 at it.
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