New "LT" engine series announced to replace the LS series
10-27-2012, 02:11 PM
#61
If you read a few articles on the new GM DI they are saying the HP pump is not good for much more HP than the factory is putting in them. Time will tell on that one.
And I hope spraying DI is a as simple as just adding a few more nozzles. But unless the DI pump can keep up than that means a separate fuel line in the intake. Will going back to an intake spray work well with the higher compression ratios and timing of the DI motors? I don't know, guess we will find out.
10-27-2012, 03:32 PM
#62
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ive spent the last 6 years working for bmw/mini, and the last 3 working at the north american headquarters.
they can bring what they want. they dont sell. think what you want.
they can bring what they want. they dont sell. think what you want.
10-27-2012, 06:36 PM
#63
I don't see this heap of over-engineering being any better than the Ls. They should have just updated the Ls series again. This new design looks overly complicated for no real reason or benefit. Now we have to take the entire top of the engine off to change an injector? And now the injector will be triple the price!
I really hope this thing is really awesome, powerful, and reliable for at least 200k miles, or else it wouldn't be worth dropping the Ls.
I really hope this thing is really awesome, powerful, and reliable for at least 200k miles, or else it wouldn't be worth dropping the Ls.
This is exactly what people said when the LS engines came out! Huh, I guess history really is bound to repeat itself!
I bet in 6 years time, gen V swaps will be all the rage, and anyone rebuilding/swapping a lowly LS engine will be considered a caveman. Time will tell.
I bet in 6 years time, gen V swaps will be all the rage, and anyone rebuilding/swapping a lowly LS engine will be considered a caveman. Time will tell.
10-27-2012, 09:27 PM
#64
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You guys hating on carbs might want to hold off and see how expensive that direct injection is going to be to work on. Something tells me upgraded injectors will be a tad more expensive than current ones, and HP will be limited by the stock high pressure pump. Yes, the aftermarket will step in but what will that cost?
Anyone know what is involved with spraying a DI motor? Seems like it will be a bit more complicated.
You know the old saying, better is the enemy of good enough.
By the way, direct injection on gasoline motors has been around forever. That was part of the reason WWII German fighter aircraft did more with less. Aside from possibly the metallurgy and electronics most of these ideas are not even new let along high tech.
And don't blame GM for the lack of diesels. Write your congressman. Smog laws are what makes diesels less than desirable in the US.
Anyone know what is involved with spraying a DI motor? Seems like it will be a bit more complicated.
You know the old saying, better is the enemy of good enough.
By the way, direct injection on gasoline motors has been around forever. That was part of the reason WWII German fighter aircraft did more with less. Aside from possibly the metallurgy and electronics most of these ideas are not even new let along high tech.
And don't blame GM for the lack of diesels. Write your congressman. Smog laws are what makes diesels less than desirable in the US.
"The injectors, which feature 6 holes each and specially designed injector spray and droplet patterns, have a flow rate of 125.7 lbs/hr at 1,450 psi, and can be fed up to 2,175 psi from the 1.48 cc/rev geometric displacement fuel pump."
10-27-2012, 10:57 PM
#65
Seriously?
Apparently you ALL forgot:
GM likes to UNDERrate their engines. Anyone remember cars rated at 305hp hitting that at the rear wheels?
Guess what else?
They are WAY overpowered on both pumps and injectors, have to be for flex fuel. Tuning direct injection will be as simple as keystrokes unless you get SERIOUS.
We all know GM Powertrain are morons. Otherwise, no one else would use their tech...wait a sec... For real, there's ONE division of GM that has been world class through all the Obama administration and before and after, GM Powertrain.
For anything but nostalgia, you are a moron to put a carb and distributor on a modern engine.
Final word, they better NOT take cues from BMW on water pumps as a maintenance item. You never know, though, they USED to make refrigerators last 50 years...then they got wise.
FWIW, my CAM ONLY LS3 (spec'd by LMR) would get 26 MPG (real calc) on the highway and put down 465 through a shitty y pipe in a 98 Camaro weighing over 3800lbs wet, without me in it. The physics was there BEFORE direct injection and VVT, it's there even moreso now.
It's GOOD to be a car person now...
Apparently you ALL forgot:
GM likes to UNDERrate their engines. Anyone remember cars rated at 305hp hitting that at the rear wheels?
Guess what else?
They are WAY overpowered on both pumps and injectors, have to be for flex fuel. Tuning direct injection will be as simple as keystrokes unless you get SERIOUS.
We all know GM Powertrain are morons. Otherwise, no one else would use their tech...wait a sec... For real, there's ONE division of GM that has been world class through all the Obama administration and before and after, GM Powertrain.
For anything but nostalgia, you are a moron to put a carb and distributor on a modern engine.
Final word, they better NOT take cues from BMW on water pumps as a maintenance item. You never know, though, they USED to make refrigerators last 50 years...then they got wise.
FWIW, my CAM ONLY LS3 (spec'd by LMR) would get 26 MPG (real calc) on the highway and put down 465 through a shitty y pipe in a 98 Camaro weighing over 3800lbs wet, without me in it. The physics was there BEFORE direct injection and VVT, it's there even moreso now.
It's GOOD to be a car person now...
Last edited by jmilz28; 10-27-2012 at 11:07 PM.
10-28-2012, 02:40 PM
#67
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Smaller displacement is coming. This is the first of many, many LT engines. This is the corvette engine, which by the way should be unveiled very soon, and they always underrate the Vette engine by 30 to 35 HP.
10-28-2012, 02:57 PM
#68
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Seriously?
Apparently you ALL forgot:
GM likes to UNDERrate their engines. Anyone remember cars rated at 305hp hitting that at the rear wheels?
Guess what else?
They are WAY overpowered on both pumps and injectors, have to be for flex fuel. Tuning direct injection will be as simple as keystrokes unless you get SERIOUS.
We all know GM Powertrain are morons. Otherwise, no one else would use their tech...wait a sec... For real, there's ONE division of GM that has been world class through all the Obama administration and before and after, GM Powertrain.
For anything but nostalgia, you are a moron to put a carb and distributor on a modern engine.
Final word, they better NOT take cues from BMW on water pumps as a maintenance item. You never know, though, they USED to make refrigerators last 50 years...then they got wise.
FWIW, my CAM ONLY LS3 (spec'd by LMR) would get 26 MPG (real calc) on the highway and put down 465 through a shitty y pipe in a 98 Camaro weighing over 3800lbs wet, without me in it. The physics was there BEFORE direct injection and VVT, it's there even moreso now.
It's GOOD to be a car person now...
Apparently you ALL forgot:
GM likes to UNDERrate their engines. Anyone remember cars rated at 305hp hitting that at the rear wheels?
Guess what else?
They are WAY overpowered on both pumps and injectors, have to be for flex fuel. Tuning direct injection will be as simple as keystrokes unless you get SERIOUS.
We all know GM Powertrain are morons. Otherwise, no one else would use their tech...wait a sec... For real, there's ONE division of GM that has been world class through all the Obama administration and before and after, GM Powertrain.
For anything but nostalgia, you are a moron to put a carb and distributor on a modern engine.
Final word, they better NOT take cues from BMW on water pumps as a maintenance item. You never know, though, they USED to make refrigerators last 50 years...then they got wise.
FWIW, my CAM ONLY LS3 (spec'd by LMR) would get 26 MPG (real calc) on the highway and put down 465 through a shitty y pipe in a 98 Camaro weighing over 3800lbs wet, without me in it. The physics was there BEFORE direct injection and VVT, it's there even moreso now.
It's GOOD to be a car person now...
10-28-2012, 07:05 PM
#70
10-28-2012, 09:47 PM
#74
ModSquad
iTrader: (6)
And for the off-roaders ready for an LT1 buggy
http://www.youtube.com/watch?v=LvVK6...e_gdata_player
http://www.youtube.com/watch?v=LvVK6...e_gdata_player
Very cool dyno test cell btw.
10-28-2012, 11:48 PM
#75
This thread is full of fail.
Was there this much hate when the LS engine came out in 97? Or when they introduced the LT1 engine in 92? How did the 3rd gen guys cope?
Times are changing. Not everyone at GM is worried about if parts on their new engine will fit a 4th gen F-body.
The LS engine was one of the best things to ever come out of GM and they know that. Do you really think they are going to take step backwards from that?
Was there this much hate when the LS engine came out in 97? Or when they introduced the LT1 engine in 92? How did the 3rd gen guys cope?
Times are changing. Not everyone at GM is worried about if parts on their new engine will fit a 4th gen F-body.
The LS engine was one of the best things to ever come out of GM and they know that. Do you really think they are going to take step backwards from that?
.
10-29-2012, 10:53 AM
#78
TECH Apprentice
10-29-2012, 11:39 AM
#80
Noticing other differences here and there.
The 'vette accessory drive appears to place everything on one belt and on the passenger side.
Driver's side appears to have a mechanical provision, perhaps for PS / hydro pump?
Piston oil squirters
Knock sensors higher and closer to the rear side of the block
Dry sump
No offset rockers
No apparent reason for the humps in the valve covers (maybe for a different configuration of the Gen V?)???
2 piece intake manifold? Hard to tell from the animation
The 'vette accessory drive appears to place everything on one belt and on the passenger side.
Driver's side appears to have a mechanical provision, perhaps for PS / hydro pump?
Piston oil squirters
Knock sensors higher and closer to the rear side of the block
Dry sump
No offset rockers
No apparent reason for the humps in the valve covers (maybe for a different configuration of the Gen V?)???
2 piece intake manifold? Hard to tell from the animation