Any engine failures on the LS3 yet?
10-31-2007, 03:49 PM
#1
Safety Car
Thread Starter
Any engine failures on the LS3 yet?
I was just curious to see if anyone has had any major or minor issues with the LS3. I have read on the Z06 forum that they are having all kinds of issues with the LS7, spinning rods, droping valves, etc... I know the LS2 has been bullet proof so far and want to see how the LS3 is measuring up.
10-31-2007, 04:00 PM
#2
I was just curious to see if anyone has had any major or minor issues with the LS3. I have read on the Z06 forum that they are having all kinds of issues with the LS7, spinning rods, droping valves, etc... I know the LS2 has been bullet proof so far and want to see how the LS3 is measuring up.
In any event,
10-31-2007, 04:25 PM
#3
Race Director
Haven't heard of any problems, but its been out for only a few months. Hardly enough time to get them all broken in yet. Isn't the LS3 based on another older GM motor, though? If it is it is probably bullet proof too.
on his car.
10-31-2007, 04:37 PM
#6
I don't believe this is the case. I think the LS3 is based on a truck engine design that is different than the LS2 in fundamental ways. I don't know the details of it completely but that's my rudimentary understanding. The LS3 is not an evolution of the LS2 (which indeed the LS7 is) but rather a redesign of a different engine altogether. Someone can correct me if I'm wrong or perhaps add more info.
10-31-2007, 04:41 PM
#7
Advanced
Member Since: Apr 2005
Location: Huntington Beach Ca, Hawaii
Posts: 69
Likes: 0
Received 0 Likes
on
0 Posts
I don't believe this is the case. I think the LS3 is based on a truck engine design that is different than the LS2 in fundamental ways. I don't know the details of it completely but that's my rudimentary understanding. The LS3 is not an evolution of the LS2 (which indeed the LS7 is) but rather a redesign of a different engine altogether. Someone can correct me if I'm wrong or perhaps add more info.
10-31-2007, 05:15 PM
#9
Safety Car
Member Since: Aug 2007
Location: Rushsylvania Ohio
Posts: 4,836
Likes: 0
Received 6 Likes
on
6 Posts
Wrong. You guys really need to do some investigating. There are many web sites detailing all the changes made to produce the LS3. The block is different, the heads are different, the intake is different, the camshaft is different, the rocker arms are different and so on. Some parts are used from the LS7, like the fuel injectors, but for the most part, it is a brand new design. Just because they started with the engineering drawings for the LS2, does not make it a warmed over LS2.
10-31-2007, 06:08 PM
#10
Safety Car
Thread Starter
Are you sure they used a new block, I thought I read it was longer rods and crank shaft to get the added CI. The cam is the same they just added .025 to the intake side of the lift. I am not sure if the pistons are any wider or not, does anyone know? As far as the cylinder walls they are not sleaved like the LS7 are they?
10-31-2007, 10:12 PM
#15
Frankly I don't care if they got the motor out of an abandoned Fiat plant. The LS3 so much better than the LS2 in every way but fuel economy that pedigree is the last thing on my mind. Maybe something was wrong with my LS2 because the difference between this and the LS3 is night and day. I really mean that....sometimes I wonder if all was right with my '05 because it had more vibration and seemed like the run up the tach was rather slow compared to the mad rush of the LS3. I often find myself revving to the engine cut off at 6.5K before I've realized it and shifted because it get's up there so much quicker than my '05..which gave me plenty of time...did.
10-31-2007, 10:18 PM
#17
Team Owner
Frankly I don't care if they got the motor out of an abandoned Fiat plant. The LS3 so much better than the LS2 in every way but fuel economy that pedigree is the last thing on my mind. Maybe something was wrong with my LS2 because the difference between this and the LS3 is night and day. I really mean that....sometimes I wonder if all was right with my '05 because it had more vibration and seemed like the run up the tach was rather slow compared to the mad rush of the LS3. I often find myself revving to the engine cut off at 6.5K before I've realized it and shifted because it get's up there so much quicker than my '05..which gave me plenty of time...did.
10-31-2007, 10:35 PM
#18
Frankly I don't care if they got the motor out of an abandoned Fiat plant. The LS3 so much better than the LS2 in every way but fuel economy that pedigree is the last thing on my mind. Maybe something was wrong with my LS2 because the difference between this and the LS3 is night and day. I really mean that....sometimes I wonder if all was right with my '05 because it had more vibration and seemed like the run up the tach was rather slow compared to the mad rush of the LS3. I often find myself revving to the engine cut off at 6.5K before I've realized it and shifted because it get's up there so much quicker than my '05..which gave me plenty of time...did.
10-31-2007, 11:01 PM
#19
Pro
Member Since: Aug 2007
Posts: 536
Likes: 0
Received 0 Likes
on
0 Posts
I love the hype, once case and all of a sudden its 'all kinds' of them are happening. LS7's spin higher and are likely driven harder, neither as good for longevity so they should be expected to have a higher mean failure rate. But I wouldnt say its the norm as is the inference of the thread. There wouldnt be any running around if that was the case.
10-31-2007, 11:01 PM
#20
Team Owner
Member Since: Jun 2005
Location: Northern, VA
Posts: 46,106
Received 2,481 Likes
on
1,944 Posts
St. Jude Donor '15
"In honor of jpee"
We need a new thread:"who has hit the rev limiter?"
I know I have. And you are right: that first to second redline comes up very very fast.
