6.2L engine? - Page 2

s346k · 06-01-2020, 10:49 AM

they are truck motors in stock form. look at a dyno graph, it’s very evident. even with car intake manifolds the power curve screams truck motor. huge, broad torque curve, tiny hp peak and then it’s immediately done.

cmitchell17 · 06-01-2020, 12:48 PM

Why do they need different HPFPs and injectors? Improve idle quality on trucks with smaller following injectors?

RobbyBeefcake87 · 06-01-2020, 02:56 PM

Quote:

Originally Posted by cmitchell17

I am assuming the Corvette exhaust manifold didn't fit the Camaro for whatever reason, which gave the design team an excuse to completely redesign a new header for the Camaro. It seems like they had to have had a good reason to create a one off unique header? What does the 6.2 truck header look like?

I'm not sure if gm releases the hp and torque plots anymore but I have seen one for the LT4 somewhere. Since apparently the Camaro headers don't change the output at all, since the claim is that the extra 5hp and 5lb ft of torque on the Corvette come from the Corvette NPP.

I believe the Camaro LT1 has ULEV status so not sure if the Corvette, so maybe this is the justification for a one-off Camaro header?

From what I've seen, the make the same at the wheels so idk about the vettes 5hp/5tq advantage. The vette is a bit faster but its not the extra 5hp rating.

avalonandl · 06-01-2020, 03:34 PM

Quote:

Originally Posted by UnknownJinX

Then I don't know why they did the tri-Y design. Packaging makes sense, but IMO tri-Y is probably more expensive to make than a 4-to-1 exhaust manifold.

They wanted something special for the Camaro 6 Gen. When you look at it the OEM headers are pretty darn good and sound great. They had more space to work with ( Corvette has the least.)

UnknownJinX · 06-01-2020, 04:09 PM

Quote:

Originally Posted by cmitchell17

I am assuming the Corvette exhaust manifold didn't fit the Camaro for whatever reason, which gave the design team an excuse to completely redesign a new header for the Camaro. It seems like they had to have had a good reason to create a one off unique header? What does the 6.2 truck header look like?

I'm not sure if gm releases the hp and torque plots anymore but I have seen one for the LT4 somewhere. Since apparently the Camaro headers don't change the output at all, since the claim is that the extra 5hp and 5lb ft of torque on the Corvette come from the Corvette NPP.

I believe the Camaro LT1 has ULEV status so not sure if the Corvette, so maybe this is the justification for a one-off Camaro header?

According to EPA, both 6th Gen Camaro and C7 Corvette LT1 engines are rated at LEV, not ULEV. C8 LT2 is ULEV.

Quote:

Originally Posted by RobbyBeefcake87

From what I've seen, the make the same at the wheels so idk about the vettes 5hp/5tq advantage. The vette is a bit faster but its not the extra 5hp rating.

Actually, Camaro supposedly makes a little more at wheel according to this dyno test here. It's the same day, same condition, same dyno and manual trans for both cars.

So either Camaro is underrated so C7 has that slightly higher advertised BHP number, or Camaro drivetrain is less lossy than C7's.

But yeah, the Vette's faster in a straight line due to aerodynamic, gearing, and weight advantages.

Quote:

Originally Posted by avalonandl

They wanted something special for the Camaro 6 Gen. When you look at it the OEM headers are pretty darn good and sound great. They had more space to work with ( Corvette has the least.)

Maybe it helps with the pops and gurgles? They are just insanely good with this car.

Granted, it has more to do with the tune and ignition timing, but I wonder if the exhaust manifold plays a part as well.

s346k · 06-01-2020, 04:23 PM

Quote:

Originally Posted by UnknownJinX

Granted, it has more to do with the tune and ignition timing, but I wonder if the exhaust manifold plays a part as well.

it doesn’t.

oldman · 06-02-2020, 05:28 AM

I would expect the cast iron manifold and cat bolted to it (don't know if the vette has 4 total or just two), would light off pretty quick. The tube header will take a bit longer to light off the cat, especially all 4. ULEV dumps a lot of raw fuel down the exhaust to light the cat off.

TJay74 · 06-02-2020, 09:20 AM

Quote:

Originally Posted by oldman

I would expect the cast iron manifold and cat bolted to it (don't know if the vette has 4 total or just two), would light off pretty quick. The tube header will take a bit longer to light off the cat, especially all 4. ULEV dumps a lot of raw fuel down the exhaust to light the cat off.

I think almost all GM vehicles now meet CARB requirements which means 4 cats total (2 primary and 2 secondary). GM used to get around this by marketing a 49 state vehicle and a California compliant vehicle. GM started to phase this out in 2009 to where they only market 1 vehicle that is 50 state certified.

MackSteelPrivateEye · 06-02-2020, 04:46 PM

Basically, but tuned for Tq. and better MPG. I think.

RobbyBeefcake87 · 06-02-2020, 11:03 PM

Quote:

Originally Posted by UnknownJinX

According to EPA, both 6th Gen Camaro and C7 Corvette LT1 engines are rated at LEV, not ULEV. C8 LT2 is ULEV.

Actually, Camaro supposedly makes a little more at wheel according to this dyno test here. It's the same day, same condition, same dyno and manual trans for both cars.

So either Camaro is underrated so C7 has that slightly higher advertised BHP number, or Camaro drivetrain is less lossy than C7's.

But yeah, the Vette's faster in a straight line due to aerodynamic, gearing, and weight advantages.

Maybe it helps with the pops and gurgles? They are just insanely good with this car.

Granted, it has more to do with the tune and ignition timing, but I wonder if the exhaust manifold plays a part as well.

Yea I've seen the camaro typically puts more down but didn't feel like searching for any links to back it up lol.

Its kind of like the old ls1 days when the camaro was rated at 20 less hp but at the wheels made the same... and the ws6 ls1 was really the king of ls1s from the factory even though it wasn't rated as so by pontiac.

avalonandl · 06-10-2020, 01:04 PM

The 4-2 -1 OE exhaust headers on the Camaro are wortth about 2-4 hp over the vette...

cmitchell17 · 06-10-2020, 07:20 PM

Quote:

Originally Posted by avalonandl

The 4-2 -1 OE exhaust headers on the Camaro are wortth about 2-4 hp over the vette...

Do you know if this was tested back to back? It would be interesting not only to see how they changed peak power but how they changed it under the curve.

6spdhyperblue · 06-10-2020, 07:24 PM

Yeah that was done more so for midrange boost to move the extra lbs, not peak numbers

Haans249 · 12-02-2020, 12:57 PM

I'm bumping this to the Top.

I'm considering replacing my LT1 in my camaro that is damaged beyond repair with the L86.

From what I've read, all the internals are exactly the same, even down to the cam timings (https://www.hotrod.com/articles/clos...evy-lt-engine/).

However, I have seen other posts mention that the oiling is different, but no one can provide any clarity on what exactly that means.

Does the L86 share the same piston oil squirters as the LT1?

Aside from all of the external items I can take off my broke LT1 and swap to the L86 (oil pan/valve covers/I have headers/intake/tb/etc...) here are the items i'd like to verify:

1) HPFP and Injectors are different between the L86 and LT1?
2) Same front and rear cover?
3) Same valley cover?
4) Stock LT1 tune should work?
5) When swapping motors, what do I need to keep in mind with the oiling? Are the oil galley's differently?
6) Does the L86 block share the same oil cooler provision as the LT1?

Thanks for any tips!

06-01-2020, 10:49 AM	#15
s346k Drives: like an old lady Join Date: Jun 2012 Location: indiana Posts: 2,395	they are truck motors in stock form. look at a dyno graph, it’s very evident. even with car intake manifolds the power curve screams truck motor. huge, broad torque curve, tiny hp peak and then it’s immediately done. __________________ 2016+ camaro: everyone’s first car

06-02-2020, 05:28 AM	#21
oldman Drives: SS 6 speed of course Join Date: Jan 2016 Location: Hilo, HI Posts: 4,316	I would expect the cast iron manifold and cat bolted to it (don't know if the vette has 4 total or just two), would light off pretty quick. The tube header will take a bit longer to light off the cat, especially all 4. ULEV dumps a lot of raw fuel down the exhaust to light the cat off. __________________ 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.

06-10-2020, 01:04 PM	#25
avalonandl Drives: 2019 ZL-1 Join Date: Feb 2009 Location: Troy, MI & Naples, FL Posts: 2,019	The 4-2 -1 OE exhaust headers on the Camaro are wortth about 2-4 hp over the vette... __________________ 2019 ZL-1 Acquired 4/23/21 at 6300 miles. Riverside Blue, A10, PDR. Traded in 2017 2SS with 6M and 32k miles. Continental Extreme Contact Sports. Now has 10,000 miles... 2012 Yukon XL Denali w/ 6.2 AWD

06-10-2020, 07:24 PM	#27
6spdhyperblue Drives: 6th gen Join Date: Aug 2013 Location: US Posts: 3,675	Yeah that was done more so for midrange boost to move the extra lbs, not peak numbers __________________ ‘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)

06-01-2020, 12:48 PM	#16
cmitchell17 Drives: 17 2SS, 8L90, Cam, Heads, E85 Join Date: Dec 2016 Location: US Posts: 1,201	Why do they need different HPFPs and injectors? Improve idle quality on trucks with smaller following injectors?

06-02-2020, 04:46 PM	#23
MackSteelPrivateEye Banned Drives: 6 on the Flo' Super Sport Join Date: Jan 2011 Location: md Posts: 1,925	Basically, but tuned for Tq. and better MPG. I think.

12-02-2020, 12:57 PM	#28
Haans249 Drives: Car Join Date: Aug 2013 Location: United States Posts: 3	I'm bumping this to the Top. I'm considering replacing my LT1 in my camaro that is damaged beyond repair with the L86. From what I've read, all the internals are exactly the same, even down to the cam timings (https://www.hotrod.com/articles/clos...evy-lt-engine/). However, I have seen other posts mention that the oiling is different, but no one can provide any clarity on what exactly that means. Does the L86 share the same piston oil squirters as the LT1? Aside from all of the external items I can take off my broke LT1 and swap to the L86 (oil pan/valve covers/I have headers/intake/tb/etc...) here are the items i'd like to verify: 1) HPFP and Injectors are different between the L86 and LT1? 2) Same front and rear cover? 3) Same valley cover? 4) Stock LT1 tune should work? 5) When swapping motors, what do I need to keep in mind with the oiling? Are the oil galley's differently? 6) Does the L86 block share the same oil cooler provision as the LT1? Thanks for any tips!

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