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Old 03-27-2016, 09:50 PM   #1
2SSRS@Gen5diy
 
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N.A. Z/28 only way to go

IMO the z/28 has to stay N.A. for track use, the camaro team needs to keep the LT4 out of the track car, there way to limited for the track, they don't like heat at all, was at the race track this weekend and 3 of 3 15-16 C7 Z06 went home on a flatbed tow truck from over heating, most did not go past the 2nd set of runs, don't do this to the Z/28.

Still hoping the go with a smaller C.I. motor that pulls to 8500 RPM, that will help on Lang tracks, and get the weight down in the 3500lb range.
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Old 03-27-2016, 09:54 PM   #2
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If the Z/28 is n/a, I bet it will be something along the lines of the LS6. Better heads, hotter cam, better intake manifold. The LS6 saw a 15% increase over the LS1. That would put the LT6 at 530 hp.

That should keep development costs down as well. Put the extra money into the light weighting. Imagine a Z/28 making 530 hp, 480 tq and weighing 3600 lbs.
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Old 03-27-2016, 10:01 PM   #3
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The Camaro platform does not seem to suffer from the issues that the Vette platform does if the media track rides of the ZL1 are any indication.
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Old 03-27-2016, 10:55 PM   #4
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For track purposes, I would take NA over boost any day. Not due to the over heating "issues" which like Eric SS said, they did MASSIVE amounts runs without holding anything back @ track for the press and not a single overheating issues but you want NA for "instant" torque and power delivery over boost to get you out of the corners much faster. Boost will help more on straights but it's not like the car will have a 2.0 engine where it suffers on straights so with enough power, it won't be an issue and will definitely be a BEAST on track.

I do like what Bhobbs said. That would be amazing! LT has a lot more potential than the LS did, so I can even see it being 560 hp and 500 tq easy and weighing very little. Not to mention that the gen5 z28 did have a "rotofab" intake on it and not the klenex tissue panel air filter like the gen6 SS / ZL1 so they could easily start it off with the CAI one which right there is a 15+ hp to start off on top of the 455! Cams, intake manifold, heads, tri-y headers even stock with a little bit of a more aggressive factory tune, greatness can happen!
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Old 03-27-2016, 11:24 PM   #5
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N.A. Z/28 only way to go

I like NA for the track too, but your comment about "instant torque" isn't an issue with a roots blower. The boost is instant, there is no lag like with turbos or centrifugal SCs.

Last edited by Nataphen; 03-28-2016 at 06:12 AM.
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Old 03-28-2016, 12:34 AM   #6
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Naturally aspirated isn't the only way to go for fast track times.....but it probably is the best. Should be interesting to see how this plays out.
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Old 03-28-2016, 01:40 AM   #7
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Quote:
Originally Posted by 2SSRS@Gen5diy View Post
IMO the z/28 has to stay N.A. for track use,.......Still hoping the go with a smaller C.I. motor that pulls to 8500 RPM, that will help on Lang tracks, and get the weight down in the 3500lb range.
I want to see an N.A. 5.5L in the next Z/28. Back in the day I had some playtime in a 1969 Z/28 with the crossram dual 4bl 302ci V8. What a quick reving high rpm motor.
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Old 03-28-2016, 02:30 AM   #8
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Originally Posted by Bhobbs View Post
If the Z/28 is n/a, I bet it will be something along the lines of the LS6. Better heads, hotter cam, better intake manifold. The LS6 saw a 15% increase over the LS1. That would put the LT6 at 530 hp.

That should keep development costs down as well. Put the extra money into the light weighting. Imagine a Z/28 making 530 hp, 480 tq and weighing 3600 lbs.
15% more power isn't always so easy. That isn't too different from LS3 to LS7 power differences, and the LS7 had some "exotic" hardware to get there. The LS7 is an expensive engine. As it is, the LT1 is an expensive engine as well relative to the LS3. To get to 15% more power while meeting emissions and MPG standards may make it as or more expensive as the LS7 is/was.
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Old 03-28-2016, 06:17 AM   #9
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I for one like the idea of an N/A Z/28. But when it comes to lag, twin scroll turbos and belt driven superchargers do a good job of mitigating that.
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Old 03-28-2016, 07:48 AM   #10
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I'm curious to see what they do with it as well. There's no way it will have the problems that the C7 does. The C7 has everything stuffed into such a tight package. Even the 2014 and 2015 Z51's without a blower overheat on warm days with spirited driving on the regular road. And they're overheating in both the transmission (esp. those that got the A8) and their oil temps. I don't think the Camaro will have that problem if they add a blower...there's more room for everything to breathe.

I think the real issue with adding a blower is screwing up the weight balance. The weight of the SS is already skewed to the front of the car.
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Old 03-28-2016, 09:52 AM   #11
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Quote:
Originally Posted by Nataphen View Post
I like NA for the track too, but your comment about "instant torque" isn't an issue with a roots blower. The boost is instant, there is no lag like with turbos or centrifugal SCs.
That is a very good point! Manufacturers always love a roots system anyhow as it's so much simpler for them to put on. Just slap it on top of the engine and done.

Quote:
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Naturally aspirated isn't the only way to go for fast track times.....but it probably is the best. Should be interesting to see how this plays out.
Very true, definitely NA isn't THE only way to go. I really am curious of which way and what they will end up going with.
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Old 03-28-2016, 10:32 AM   #12
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Originally Posted by Zeke.Malvo View Post
15% more power isn't always so easy. That isn't too different from LS3 to LS7 power differences, and the LS7 had some "exotic" hardware to get there. The LS7 is an expensive engine. As it is, the LT1 is an expensive engine as well relative to the LS3. To get to 15% more power while meeting emissions and MPG standards may make it as or more expensive as the LS7 is/was.
The cost of the LS7 was due to the unique block and heads, along with the titanium components. The LT4 is much cheaper than the LS9, despite making more power and torque.

Building the new engine off the LT1 block and heads will help keep costs down.
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Old 03-28-2016, 11:47 AM   #13
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If the Z/28 is n/a, I bet it will be something along the lines of the LS6. Better heads, hotter cam, better intake manifold. The LS6 saw a 15% increase over the LS1. That would put the LT6 at 530 hp.

That should keep development costs down as well. Put the extra money into the light weighting. Imagine a Z/28 making 530 hp, 480 tq and weighing 3600 lbs.
I don't know even know if it would need that much HP. with how good the Alpha is I think 500 or a bit over would be plenty.

But I agree with you somethign ala LS1 to LS6 is what I see happening
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Lets keep it simple. ..
it has more power...its available power is like a set kof double Ds (no matter where your face is... theyre everywhere) it has the suspension to mame it matter...(
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Old 03-28-2016, 12:08 PM   #14
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I don't know even know if it would need that much HP. with how good the Alpha is I think 500 or a bit over would be plenty.

But I agree with you somethign ala LS1 to LS6 is what I see happening
Yeah but if 500 is good 530 is better.
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