[70SS]

I've noticed how my SS has a very subtle shake when the engine is idling. I assume this is from this big V8 I have under the hood. Its actually very impressive feeling sitting still at a stop. Is this from timing, cam shaft size or something different I'm not aware of. This is for all you engine guys. I love this car!

 

[SlingShot]

Normal for the LS3 ... It's from the cam that is in it.

 

[Headrat]

In the January Car and Driver magazine when they did the comparo with the Dodge they noted that " the LS3 gently rocks the car at idle-----". Soooo it is a characteristic that we can live with.

 

[70SS]

Thanks for the info. I wasn't complaining that's for sure. It constantly reminds you of what your driving! A sleeping giant!

 

[bpoirier]

Sounds like an LS3 running just right.

 

[PFWiz]

I've noticed how my SS has a very subtle shake when the engine is idling. I assume this is from this big V8 I have under the hood. Its actually very impressive feeling sitting still at a stop. Is this from timing, cam shaft size or something different I'm not aware of. This is for all you engine guys. I love this car!

I noticed that today too....

Also noticed tach only indicates about 550 rpm idle! I wonder if very low idle (maybe to minimize fuel usage?) causes engine to subtly stumble a couple times a minute? That's kinda what it felt like to me.

Did not feel like the lope of my stage 2 (cammed) Harley..... Gotta admit though , I never had a LS3 powered vehicle before....

 

[2074]

If it isn't rocking at idle the cam's too mild!

 

[Commodoreman2000]

I noticed that today too....

Also noticed tach only indicates about 550 rpm idle! I wonder if very low idle (maybe to minimize fuel usage?) causes engine to subtly stumble a couple times a minute?

The reason why it idles so low is due to no Hydraulic Power steering. With the Electric Power Steering (EPS) they were able to lower the idle as it no longer needs to compensate for the parasitic loss of the engine needing to run the old school system.

As a result of the lower idle they were able to gain a marginal fuel economy improvement. I suspect the the PPV will be when idling be the ducks nuts as it inherits EPS and I suspect PD's will see improvement in fuel use when idling for long periods.

 

[PFWiz]

"I suspect the the PPV will be when idling be the ducks nuts"

Are the "Duck's Nuts" something like the "Cat's Pajamas".

 

[z51vett]

No more like dunkin donuts or krispy crème. Haha not sure!!!!!!!!!!!
z51vett
Doug

 

[SlingShot]

The reason why it idles so low is due to no Hydraulic Power steering. With the Electric Power Steering (EPS) they were able to lower the idle as it no longer needs to compensate for the parasitic loss of the engine needing to run the old school system.

As a result of the lower idle they were able to gain a marginal fuel economy improvement. I suspect the the PPV will be when idling be the ducks nuts as it inherits EPS and I suspect PD's will see improvement in fuel use when idling for long periods.

My current 2010 Camaro LS3 SS idles at 550rpm and it doesn't have EPS, on the other hand my current ZL1 Camaro with EPS idles at 600rpm ...

 

[Headrat]

Hey, Doug, The training wheels are coming !!! Now donuts?? I think I'm going to need them also if I don't get away from this "seefood" diet. Love the holidays.

 

[z51vett]

Hey Jere that has been a big problem vacation in fla 3 lbs can't loose got up this morning another 3 has jumped on for the ride. Here is the funny part I cut back on my usual holiday eating. Nothing works at this stage of life not even the gym.
Its the apple dapple cake ham and turkey.
z51vett
Doug

 

[Commodoreman2000]

My current 2010 Camaro LS3 SS idles at 550rpm and it doesn't have EPS, on the other hand my current ZL1 Camaro with EPS idles at 600rpm ...

Maybe the Camaro engineers used different calibrations? I'm just going off of everything I know for Commodore based applications of the V8 variants, VE to VF. Hydraulic vs EPS.

I do know they made the biggest gains in reducing Idle RPM on the V6 variants.

 

[2074]

Maybe the Camaro engineers used different calibrations? I'm just going off of everything I know for Commodore based applications of the V8 variants, VE to VF. Hydraulic vs EPS.

I do know they made the biggest gains in reducing Idle RPM on the V6 variants.

Yeah I remember seeing somewhere that GM was touting the fact that EPS allowed them to lower the idle rpms.