Lutz: GM mulls 4-cylinder engine for new Camaro
#121
And no, you will not get 3 times the mileage out of any car with synthetic. Maybe 10-30 more miles out of a tank of fuel.
By that calculation, Corvettes should be getting 900 miles out of a tank of gas
#122
The only real problem I have with turbo'd engines is the reliability concern and higher maintenance. Since I'm no turbo expert, they may have changed things in the last few years but the last I knew about turbos you really need to use synthetic oil and before you shut the car off you need to let the turbos wind down by letting the engine idle a minute. You risk shorter life of the turbo bearings if you shut the engine (and thus oil pressure to the turbo bearings) before they wind down. Who's gonna sit in their garage, at the mall, or in their spot at work for a minute before they shut the engine off? Not to mention they run hot
On the off chance that GM ever builds such an aggressive turbo motor, I'm sure that they would integrate a turbo timer into the car's factory computer system.
Superchargers whine. Turbos hiss. I don't care for supercharger whine myself, but I love the sound of a spooling turbo.
Well built V6s and V8s are pretty much change the oil and forget about it reliable. You can drive them hard all day, come in to the garage, shut it off, and not think twice about it. Most 6's are good with any kind of half decent oil, and if the V8 isn't a high performance design, you can use just about any oil in them as well. Good for 150-200,000 miles of fun, trouble free, worry free motoring. They are smooth, V8s sound great at all RPMs, and even now V6s sound great so long as they aren't pushed to the absolute limit.
When was the last time anyone made a turbo charged engine you could say that about?
When was the last time anyone made a turbo charged engine you could say that about?
when you let off the gas (say, to shift) the excess pressure is released via a blow off valve, which makes a more pronounced hiss, or sometimes a quick high pitched whistle noise that lasts for a split second (but that's usually with aftermarket turbo systems that are optimized for power at he expense of noise)
Just in case, I think you should be prepared to join Jason's new cult.
#123
We don't know if the V6 will already have drivetrain and suspension components strong enough to handle the V8, or if the V6 and V8 will have different parts. I think it's safe to assume that the V8 will have larger brakes (although those brakes might be optional on the V6).
I think it's safe to assume that the V8's transmission options will be the T56 (or better yet, the TR6060) or the 6L80.
We can hope that the V6 gets the T56, but I don't think it will. I suspect it will get a smaller, lighter six-speed manual. I also suspect that its automatic trans will be the 6L50. A T56 weighs about 140 pounds, and a 6L80 weighs about 180 pounds (both dry, without clutch or converter). I wasn't able to find comparable weights for the CTS's 6-speed manual or for the 6L50. If anyone wants to spend more time finding those, we could compare.
#124
There are two different versions of the 3.6L V6. One has direct injection (304hp), and one does not (~260hp). Both are available in the CTS. Lutz said they'd be using the same V6 that is used in the CTS, and he said around 260hp, so we can therefore conclude that the V6 Camaro will not have direct injection.
That's a fair point.
All of those things are generally only an issue when you're dealing with an aftermarket, upgraded turbo. If you upgrade your turbo, you should buy a turbo timer, which keeps the engine running automatically for a few minutes after you get out of the car. Problem solved.
On the off chance that GM ever builds such an aggressive turbo motor, I'm sure that they would integrate a turbo timer into the car's factory computer system.
You've obviously not driven any factory turbo cars manufactured in the last couple of years.
Superchargers whine. Turbos hiss. I don't care for supercharger whine myself, but I love the sound of a spooling turbo.
The last time? Probably in the last few minutes, since GM is still building Turbo Ecotecs, Subaru is still putting turbo motors in the WRX, and Mitsubishi is still putting turbo motors in the Evo. All of these engines have demonstrated good reliability. And that's not even bringing up turbodiesel motors.
I have yet to see a factory turbo vehicle with a blowoff valve. Usually there's just a wastegate.
Just in case, I think you should be prepared to join Jason's new cult.
That's a fair point.
All of those things are generally only an issue when you're dealing with an aftermarket, upgraded turbo. If you upgrade your turbo, you should buy a turbo timer, which keeps the engine running automatically for a few minutes after you get out of the car. Problem solved.
On the off chance that GM ever builds such an aggressive turbo motor, I'm sure that they would integrate a turbo timer into the car's factory computer system.
You've obviously not driven any factory turbo cars manufactured in the last couple of years.
Superchargers whine. Turbos hiss. I don't care for supercharger whine myself, but I love the sound of a spooling turbo.
The last time? Probably in the last few minutes, since GM is still building Turbo Ecotecs, Subaru is still putting turbo motors in the WRX, and Mitsubishi is still putting turbo motors in the Evo. All of these engines have demonstrated good reliability. And that's not even bringing up turbodiesel motors.
I have yet to see a factory turbo vehicle with a blowoff valve. Usually there's just a wastegate.
Just in case, I think you should be prepared to join Jason's new cult.
#125
I think he was referring to miles in between oil changes...not MPG. just my .02.
#126
There are two different versions of the 3.6L V6. One has direct injection (304hp), and one does not (~260hp). Both are available in the CTS. Lutz said they'd be using the same V6 that is used in the CTS, and he said around 260hp, so we can therefore conclude that the V6 Camaro will not have direct injection.
We don't know if the V6 will already have drivetrain and suspension components strong enough to handle the V8, or if the V6 and V8 will have different parts. I think it's safe to assume that the V8 will have larger brakes (although those brakes might be optional on the V6).
#127
I looked up the engine weights. The 3.6L engine weighs 370lbs, and the LS2 weighs 440lbs. I couldn't find a weight for the LS3, but I think it's safe to assume that it's not significantly different.
We don't know if the V6 will already have drivetrain and suspension components strong enough to handle the V8, or if the V6 and V8 will have different parts. I think it's safe to assume that the V8 will have larger brakes (although those brakes might be optional on the V6).
I think it's safe to assume that the V8's transmission options will be the T56 (or better yet, the TR6060) or the 6L80.
We can hope that the V6 gets the T56, but I don't think it will. I suspect it will get a smaller, lighter six-speed manual. I also suspect that its automatic trans will be the 6L50. A T56 weighs about 140 pounds, and a 6L80 weighs about 180 pounds (both dry, without clutch or converter). I wasn't able to find comparable weights for the CTS's 6-speed manual or for the 6L50. If anyone wants to spend more time finding those, we could compare.
We don't know if the V6 will already have drivetrain and suspension components strong enough to handle the V8, or if the V6 and V8 will have different parts. I think it's safe to assume that the V8 will have larger brakes (although those brakes might be optional on the V6).
I think it's safe to assume that the V8's transmission options will be the T56 (or better yet, the TR6060) or the 6L80.
We can hope that the V6 gets the T56, but I don't think it will. I suspect it will get a smaller, lighter six-speed manual. I also suspect that its automatic trans will be the 6L50. A T56 weighs about 140 pounds, and a 6L80 weighs about 180 pounds (both dry, without clutch or converter). I wasn't able to find comparable weights for the CTS's 6-speed manual or for the 6L50. If anyone wants to spend more time finding those, we could compare.
#128
If the v6 came out with a 6 speed the MPG would be even better. If it comes with a 5 speed I dont see it being that much better then the LS3 if driven without the pedal down 24/7.
#129
Uh, 3 times the mileage? If that were the case, everyone would be using synthetic. I do use it in my car, but my point, if you would actually take a second to read and undersand what I am saying, is that if you the oil life monitor or do your oil changes at the right intervals, most modern engines that aren't high performance will run forever with any oil. Heck, my Mom just sold her 1998 LeSabre with the series II 3800 and it had 160,000 miles. Not a leak, never burned, and my stepdad and I used nothing but standard Valvoline 10w30 in it. I guarantee you the 3.6 VVT will run just as well if not better than that engine with standard old fashioned oil.
And no, you will not get 3 times the mileage out of any car with synthetic. Maybe 10-30 more miles out of a tank of fuel.
By that calculation, Corvettes should be getting 900 miles out of a tank of gas
And no, you will not get 3 times the mileage out of any car with synthetic. Maybe 10-30 more miles out of a tank of fuel.
By that calculation, Corvettes should be getting 900 miles out of a tank of gas
I use nothing but synthetic and have never had an engine failure in any car that I have ran syntech thru for the time that i have owned them. Except on car I bought that blew up almost as soon as I bought it but it had been abused.
#131
5 speeds ARE necessary if they cost less. And you can get the same mileage as a 6 speed if it has a tall overdrive (5th) gear.
#132
with 5 speeds in the v6's, that would save $$ and lower the cost of the car.
#133
How exactly would your car get the same mileage with one less overdrive gear? Besides, not all six speeds have two overdrive gears.
#135
The number of gear ratios is entirely irrelevant.
As far as gear ratios are concerned, fuel economy is based on the ratio of your lowest gear. In the case of the T56 ratios, they took the ratios a normal five-speed with a single overdrive and added a sixth ratio, even lower than the existing 5th gear overdrive.
In the case of most other six-speeds, they make the ratios closer together, and sixth gear is just a regular overdrive, not a super-low overdrive like on the T56.
As far as gear ratios are concerned, fuel economy is based on the ratio of your lowest gear. In the case of the T56 ratios, they took the ratios a normal five-speed with a single overdrive and added a sixth ratio, even lower than the existing 5th gear overdrive.
In the case of most other six-speeds, they make the ratios closer together, and sixth gear is just a regular overdrive, not a super-low overdrive like on the T56.