[SS 1LE]

Originally Posted by TrackClub

Randy specifically mentions the motor is slow to get to redline. 3:15 of the Motor Trend vid. He doesn't elaborate what this means exactly. Watching several track PDR vids I wouldn't say it is due to tall gears. And from those vids I'd say the motors get up to redline just fine.

It is not a 4v DOHC motor, and it has "tall" gearing, so it will not rip up the rev range. Which for tracking, isn't necessarily a bad thing.

Originally Posted by TrackClub

The Camaro LT1 does NOT vary from a Vette LT1 just by "exhaust and accessories". It also has a different intake and most importantly (perhaps) a different oil return architecture, likely for the benefit of a wet sump. Per GM's official estimation it is "20%" different. That's rather substantial. Indeed, it has been "re-worked" for the Camaro (and it is a good thing IMO).

My uncle works at a GM engine factory and works directly with John Rydzewski (one of the main LT1 engineers). So I can tell you for certain that the dry sump Corvette and Camaro LT1's are indeed nearly the same. The only real differences are as I said, pretty minor like accessories (intake could fit this category), exhaust and a few other things (like the Camaro has a built in sort of oil separator thing), all external stuff for the most part. The main guts of the engines are the exact same, nothing substantial was changed.

[Tucsonas]

I know some dealers here in AZ have the car set to the "teen" driver settings, by default when you go for a test drive without the salesman.... just a thought

[IDEALG]

Originally Posted by RobertSmith

What dealer had that car in stock?

Oasis

[SaphfireSS]

You didn't have the car up to temp yet. It varies redline rpm speeds when it isn't up to temps yet. About halfway to temp if you hard accelerate it will limit rpm's around 5000.

[Mr. Wyndham]

Originally Posted by SaphfireSS

You didn't have the car up to temp yet. It varies redline rpm speeds when it isn't up to temps yet. About halfway to temp if you hard accelerate it will limit rpm's around 5000.

No, that's not supposed to happen. Someone posted the tables...the 5000 limit stops after 5 seconds of running at sub 100º.

[CapeCruisin]

OP,

I'm sorry if this has been mentioned but is this your issue?

http://www.corvetteforum.com/forums/...500-miles.html



I'm curious if this is a similar thing.

[Mr. Wyndham]

Originally Posted by CapeCruisin

OP,

I'm sorry if this has been mentioned but is this your issue?

http://www.corvetteforum.com/forums/...500-miles.html



I'm curious if this is a similar thing.

As I understand, that limit to the tach on C7 Vettes is visual only, to reinforce the break in period...but the engine isn't actually limited in any way.

[SaphfireSS]

Not true. Mine does it every day.

[SaphfireSS]

Originally Posted by Mr. Wyndham

As I understand, that limit to the tach on C7 Vettes is visual only, to reinforce the break in period...but the engine isn't actually limited in any way.

The Camaros do not have this feature. The HUD tach is the only thing that changes and like I said it will change the redline until the car gets up to temp. Every time you cold start it.

Originally Posted by Mr. Wyndham

No, that's not supposed to happen. Someone posted the tables...the 5000 limit stops after 5 seconds of running at sub 100º.

Not true. Mine does it every day.

[Ryephile]

Originally Posted by Mr. Wyndham

No, that's not supposed to happen. Someone posted the tables...the 5000 limit stops after 5 seconds of running at sub 100º.

In HP Tuners, that's basically true for coolant. It also shows an oil temp threshold map, RPM limit vs. Oil Temp, in the Engine/Fuel/Cutoff,DFCO menu. At -10°C oil temp the engine will be limited to 3k RPM, at 5°C it'll allow 4k RPM, and will continue to ramp to the normal 6,600 RPM redline at 20°C.

At least, these are the default settings in HP Tuners for a C7 Corvette.

[mjk3888]

I can attest to the RPM shift lights showing up at much lower RPMs when the engine is cold. Like around 3k. Thats after starting and about a minute of idling out of my work parking lot. Then coasting downhill in 2nd gear at about 3k to get some good exhaust noises. The car pops and crackles like an F-Type on decel when cold.

[seanblurr]

Originally Posted by mjk3888

I can attest to the RPM shift lights showing up at much lower RPMs when the engine is cold. Like around 3k. Thats after starting and about a minute of idling out of my work parking lot. Then coasting downhill in 2nd gear at about 3k to get some good exhaust noises. The car pops and crackles like an F-Type on decel when cold.

Totally unrelated, but I fricken love how this car sounds on decel when cold. I wish they ECU cut the fuel all the time like that. Pops and cracks all day!

Now back to the regularly scheduled program.

[X25]

I wonder if it switched to bad fuel map for one reason or another, and not switching back in a hurry. Perhaps an ECU reset might do the trick?

This is a post for Gen5, but the idea is same:
http://www.camaro5.com/forums/showthread.php?t=38964

[geaux_tigerss]

I have the exact same experience with my car. 2017 2SS M6. I followed the 1500 mile break in guideline with from the manual.

In first, second, and third gears I've noticed a hesitation or two. One between 5000-5500 and the other around 6000. It's like timing gets pulled for a fraction of a second and then comes back. It does it regardless of drive mode or whether traction or stability control is on or off. Outside temperature is 80 or so, clear and dry. Roads are good. Has done it consistently on premium fuels from many different stations.

It isn't the tires breaking loose (in 3rd? Come on) and it isn't bumping the rev limiter (happens twice and tbh this car isn't so fast that I'm gonna confuse 5000 to 5500 with 6500). This isn't my first fast car or even first camaro.

But wait, there's more. Yesterday morning I got a CEL. Car start bucking and surging like it's got a big cam with a really bad tune. Happens at all RPMs, constant speeds, acceleration, you name it. Idles well tho. Dropped it off at the dealer to fix.

Their first idea is bad camshaft position solenoid. That didn't fix it. Second try is a new ECM. Waiting on that to come in now.

Edit: my signature is a few cars out of date. I'll fix it when I'm not on mobile.