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Old 03-29-2012, 01:05 AM   #1
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Question ZL1 is Happy at what RPM range

Ok, I know people haven't driven their ZL1 YET, but for those that are in the know with the LSA motor, what RPM range is this motor happy at?

I never owned a vehicle with a SC or Turbo, so I have no idea what is a safe range to cruse in.

In my previous cars I would cruse between 3000 - 4000, then step on it and shift at 6000 with a redline of 7000.

I know the mpg won't be pretty, but then again it's not pretty to begin with.

Thanks!
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Old 03-29-2012, 06:51 AM   #2
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If your talking about a cruising RPM, based off my LS3 I'd say 2K. The power band comes in around 4K.
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Old 03-29-2012, 07:02 AM   #3
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With the supercharger I would think the tork would come in alot lower than 3-4K rpm. So cruising around at about 2000-2500 rpm is probably good.
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Old 03-29-2012, 08:03 AM   #4
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Maximum grunt (torque peak) occurs at 3800 rpm on my CTS-V (manual).

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Old 03-29-2012, 09:06 AM   #5
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What's happy? LSA should be able to lope around on the freeway at less than 2K. Fuel cut-off is about 6200 or so, and it is making power right up to it. I think you're going to have to give circumstances before anyone can comment more, like racing, just driving, or whatever.
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Old 03-29-2012, 12:05 PM   #6
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the correct answere is about 800-6200. anything below and it start to feel a little melancholy and anything above that it and starts to get a bit pissed off.
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Old 03-29-2012, 12:24 PM   #7
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Originally Posted by OVRKLL View Post
In my previous cars I would cruse between 3000 - 4000, then step on it and shift at 6000 with a redline of 7000.
That's a high rpm to be crusing at with a V8, unless you're traveling at pretty high speeds, or have a really low rear end ratio. I'd expect the LSA in ZL1 not to be much different than the LS3. The supercharger wouldn't affect the speed the engine is comfortable crusing at.
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Old 03-29-2012, 12:54 PM   #8
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Originally Posted by radz28 View Post
What's happy? LSA should be able to lope around on the freeway at less than 2K. Fuel cut-off is about 6200 or so, and it is making power right up to it. I think you're going to have to give circumstances before anyone can comment more, like racing, just driving, or whatever.
Happy would be driving down the freeway...i.e. 60 mph...would you be in 6th gear, 5th, 4th etc. I know the lower gear will cause higher gas consumption, but then again you don't want to be lugging the engine either....So Happy would be the point between lugging the engine - overly revving the engine in the higher RPM range while driving down the freeway, blvd, back road etc.

I guess a better way to ask this is:
If I'm driving at 35mph what would be the appropriate gear to be in?
If I'm driving at 60mph what would be the appropriate gear to be in?
etc. etc. etc.
Key word being "appropriate".

Thank you!
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Old 03-29-2012, 12:56 PM   #9
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Originally Posted by DangerouSS View Post
That's a high rpm to be crusing at with a V8, unless you're traveling at pretty high speeds, or have a really low rear end ratio. I'd expect the LSA in ZL1 not to be much different than the LS3. The supercharger wouldn't affect the speed the engine is comfortable crusing at.
Yeah that's what I thought hence my question.
Sorry I wasn't clear on this...those rpm ranges were in a 4cyl bimmer and a 6cyl porsche.
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Old 03-29-2012, 01:05 PM   #10
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Quote:
Originally Posted by OVRKLL View Post
Happy would be driving down the freeway...i.e. 60 mph...would you be in 6th gear, 5th, 4th etc. I know the lower gear will cause higher gas consumption, but then again you don't want to be lugging the engine either....So Happy would be the point between lugging the engine - overly revving the engine in the higher RPM range while driving down the freeway, blvd, back road etc.

I guess a better way to ask this is:
If I'm driving at 35mph what would be the appropriate gear to be in?
If I'm driving at 60mph what would be the appropriate gear to be in?
etc. etc. etc.
Key word being "appropriate".

Thank you!
In my '95 with a T56, I'd cruise at those speeds in 5th and 6th, respectively. The gear ratios were the same, but I had OEM 3.42s (not 3.73s) and shorter tires, at 26" (not +28").

I'd say, if you're maintaining the same speed, keeping RPMs from LSA between 1600-1800 should be great for MPG and putting-along. GM small-blocks make great low-end power. 1800 is not lugging at all for these motors. Don't expect to pass anyone at those RPMs, but I've taken a lot of mountain grades at high elevations in my '95, with considerably LESS power (and weight, lol) so I suspect ZL1 isn't going to be too different

JMVHO - obviously - I don't have one, so these are just educated guesses only
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Old 03-29-2012, 01:53 PM   #11
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Originally Posted by radz28 View Post
In my '95 with a T56, I'd cruise at those speeds in 5th and 6th, respectively. The gear ratios were the same, but I had OEM 3.42s (not 3.73s) and shorter tires, at 26" (not +28").

I'd say, if you're maintaining the same speed, keeping RPMs from LSA between 1600-1800 should be great for MPG and putting-along. GM small-blocks make great low-end power. 1800 is not lugging at all for these motors. Don't expect to pass anyone at those RPMs, but I've taken a lot of mountain grades at high elevations in my '95, with considerably LESS power (and weight, lol) so I suspect ZL1 isn't going to be too different

JMVHO - obviously - I don't have one, so these are just educated guesses only
Thank you very much...your educated guess is better than mine at this point. I hear you on the weight...oh sorry, you were talking about the car's weight...
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Old 03-29-2012, 02:14 PM   #12
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61mph is 1700 in 6th

36mph is 1600 in 4th
35mph is 2000 is 3rd

with the torque this car will have any highway cruise should be in 6th. www.f-body.org/gears/

1st 2.66
2nd 1.76
3rd 1.3
4th 1
5th .8
6th .63

3.73 gear
305/35-20 tire size.
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Old 03-29-2012, 02:24 PM   #13
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Originally Posted by hognutz View Post
61mph is 1700 in 6th

36mph is 1600 in 4th
35mph is 2000 is 3rd

with the torque this car will have any highway cruise should be in 6th. www.f-body.com/gears/

1st 2.66
2nd 1.76
3rd 1.3
4th 1
5th .8
6th .63

3.73 gear
305/35-20 tire size.
Mahalo for the info...the link doesn't work though...:(
Yeah this is going to be a Torquey one!
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Old 03-29-2012, 04:46 PM   #14
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Quote:
Originally Posted by OVRKLL View Post
Mahalo for the info...the link doesn't work though...:(
Yeah this is going to be a Torquey one!
fixed it.
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Old 03-29-2012, 06:29 PM   #15
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fixed it.
Mahalo...it's now bookmarked!
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Old 03-29-2012, 06:37 PM   #16
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I saw this...Name:  CamaroZL1_TorqueCurve.jpg
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Old 03-29-2012, 08:11 PM   #17
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I think 2000rpm seems like a sweet spot for cruising. In my V, in 6th at 70mph I am at around 2000rpm even at 55 I can still accelerate in 6th. In traffic on the LIE I go from 1st to 3rd and sometimes stay in gear from 15 mph to 45 mph, less shiftingand braking.
There's so much torque any gear is good, just depends on how much gas I want to use or save. Even driving conservatively around town I have yet to break an average of15mpg. At 70 mph in 6th the instant mpgs read anywhere from 16 to 22 with trying to maintain speed.
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Old 03-29-2012, 10:15 PM   #18
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There is 500+ ft/lbs of torque from 2500-6200, That is a very flat curve and seat of the pants response will be very fun.
That graph is all f***ed up tho, should cross over at 5252 rpm
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Old 03-29-2012, 10:28 PM   #19
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There is 500+ ft/lbs of torque from 2500-6200, That is a very flat curve and seat of the pants response will be very fun.
That graph is all f***ed up tho, should cross over at 5252 rpm
The ordinate axis scale is messed up. The ordinate axes for horsepower and torque are not the same. If they were, you would see the correct crossover behavior.
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Old 03-29-2012, 10:31 PM   #20
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The ordinate axis scale is messed up. The ordinate axes for horsepower and torque are not the same. If they were, you would see the correct crossover behavior.
Exactly, it's just easier to read with similar ordinate axes if you are looking at curves in the power delivery.
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Old 03-30-2012, 02:29 PM   #21
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Old 03-30-2012, 11:51 PM   #22
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Quote:
Originally Posted by OVRKLL View Post
Ok, I know people haven't driven their ZL1 YET, but for those that are in the know with the LSA motor, what RPM range is this motor happy at?

I never owned a vehicle with a SC or Turbo, so I have no idea what is a safe range to cruse in.

In my previous cars I would cruse between 3000 - 4000, then step on it and shift at 6000 with a redline of 7000.

I know the mpg won't be pretty, but then again it's not pretty to begin with.

Thanks!
ZL1 seemed to REALLY like the 1300-2000 range for cruising on our little driver. Very little noise (if any, really..), reasonable throttle/acceleration responsive, and good fuel economy (relatively speaking).

It's just so flippin' torquey. There was a small stretch where rpms dropped to 700-900 or so...you could tell the engine was huffing a little...but it wasn't upset about it.

Shifting above 5500 activates skip-shift, for whatever that's worth...redline 6200. It's not a screamer...but it PULLS HARD!
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