Guessing Whats Under the Z/28's Hood - Page 2

hotlap · 05-20-2016, 07:55 PM

For those that will buy one, the namesake of the car and to never read Bhobb's say Camaro is limited by Corvette again

..... I'm hoping for

"A new large displacement NA engine, serving as the successor to the LS7. Likely to put out something in the mid 500s".

Bhobbs · 05-20-2016, 08:22 PM

Quote:

Originally Posted by hotlap

For those that will buy one, the namesake of the car and to never read Bhobb's say Camaro is limited by Corvette again

..... I'm hoping for

"A new large displacement NA engine, serving as the successor to the LS7. Likely to put out something in the mid 500s".

I fully accept the possibility that I am wrong. I hope I am. A new 7.0 making 550+ hp would be awesome.

Egon · 05-20-2016, 08:37 PM

I really think if Ford hadn't come out with the Voodoo FPC engine especially for the GT350 the Z/28 would have been more likely to get the LT4. But because the Voodoo was so unexpected and has been praised so much by reviewers I think Chevy knows they have to step it up and do something different for the Z/28. Ford raised the bar and I think people will be really disappointed if there isn't something special in the works for the Z/28 engine.

Tractionless · 05-20-2016, 10:39 PM

Z/28 exclusive, all aluminum, DOHC, 32V, 427ci, V8 in the neighborhood of 600hp. Voodoo whoo?

oakaro68 · 05-21-2016, 07:13 AM

How does everyone feel about the idea of overhead cams? I know they experimented with that on the 90's ZR1, but moving away from the cherished old school pushrod design might indicate the beginning of the end of the pushrod for GM performance

233 · 05-21-2016, 09:16 AM

8 liter v10 hahahahahaha

DenverTaco07 · 05-21-2016, 11:38 AM

all good posts...

my guess is LT4 but on the other hand GM seems willing and capable of blowing our minds so who freakin knows.

90503 · 05-21-2016, 11:53 AM

Sticking with LT4 prediction....The game is for the fastest track weapon....That's heritage enough for the Z/28....FI's time has come. It's still Chevy/GM.

A brand new, very low volume, super-car unique engine still isn't in their mind-set. Maybe there is something in the skunk-works for a future mid-engine Corvette in a few more years. I think it's just too soon for the Z/28 if it comes out in the 50th anniversary year, which it should.

A slightly bumped up LT1 for the Z/28? I don't think so. That should be saved for a 1LE or re-fresh SS upgrade. A very high hp N/A v-8? They tried that road and had to turn around. I don't think they will build an in-betweener engine that can't keep up with the ZL-1 just to say that it's N/A.

The volume of Z/28 units just isn't/won't be there to justify a unique engine. We'll see, though!...Happy guessing!

IOMike · 05-21-2016, 12:13 PM

Quote:

Originally Posted by Tractionless

Z/28 exclusive, all aluminum, DOHC, 32V, 427ci, V8 in the neighborhood of 600hp. Voodoo whoo?

I like this...probably 560hp though, 427 or 396.

mkorgan · 05-21-2016, 05:29 PM

Quote:

Originally Posted by Tractionless

Z/28 exclusive, all aluminum, DOHC, 32V, 427ci, V8 in the neighborhood of 600hp. Voodoo whoo?

We could only hope for something this special.

Posaune · 05-21-2016, 06:04 PM

If it truly is N/A, I can think of four possible displacements, three of which are based on current production offerings:
1) 6.2 LT1 based - hotter cam and allowed to rev more
2) 5.3 L83 based - would have to be allowed to rev very high (same 96MM Bore and 92MM stroke as the L83
3) 5.7 using the 99.6MM bore and 92MM stroke for the GenV based LV3 4.3L V6.
4) 7.0 Same 104.8MM Bore and 101.6MM stroke as the LS7. This is the only bore/stroke combo that isn't currently in production

Could the smaller displacement options be configure to allow the RPMs above 7000?

Posaune · 05-21-2016, 06:05 PM

Quote:

Originally Posted by oakaro68

How does everyone feel about the idea of overhead cams? I know they experimented with that on the 90's ZR1, but moving away from the cherished old school pushrod design might indicate the beginning of the end of the pushrod for GM performance

I would much rather them stay with Cam-in-block, OHV configuration.

Bhobbs · 05-21-2016, 06:14 PM

A 5.3 liter isn't going to make 500 hp. The 5.2 voodoo is DOHC and has to spin to 7500 to make that much power.

Posaune · 05-21-2016, 07:17 PM

Quote:

Originally Posted by Bhobbs

A 5.3 liter isn't going to make 500 hp. The 5.2 voodoo is DOHC and has to spin to 7500 to make that much power.

No, probably not, at least not while making emissions.

Just laying out the possibilities. Like the 5.7L isn't in production in V8 form but the bore and stroke are in the LV3 V6.

My guess is either a 6.2 or 7.0 with AFM removed to increase RPM.

View Poll Results: What do you think will power the Z/28? (
Small (5 - 5.5L range) high revving engine	26	8.10%
LT1 with minor power bump (CAI, exhaust, etc)	10	3.12%
Heavily reworked LT1, similar to the LS6 from the C5 Z06; ~500 hp	65	20.25%
Large displacement sucessor to the LS7, ~550 hp	129	40.19%
LT4, same as from the ZL1, CTS-v, and Z06	50	15.58%
'super LT4' with a bigger blower or turbos making 700+	31	9.66%
Other (please specify)	10	3.12%
Voters: 321. You may not vote on this poll

05-20-2016, 07:55 PM	#15
hotlap Drives: 20 1LE 2SS M6 Rally Green Join Date: Mar 2014 Location: Franklin WI Posts: 6,632	For those that will buy one, the namesake of the car and to never read Bhobb's say Camaro is limited by Corvette again ..... I'm hoping for "A new large displacement NA engine, serving as the successor to the LS7. Likely to put out something in the mid 500s". __________________ "the trouble with our liberal friends is not that they're ignorant; it's just that they know so much that isn't so.” Ronald Reagan -

05-20-2016, 08:37 PM	#17
Egon Drives: 2014 2SS/RS 1LE Join Date: May 2013 Location: Charlotte NC Posts: 977	I really think if Ford hadn't come out with the Voodoo FPC engine especially for the GT350 the Z/28 would have been more likely to get the LT4. But because the Voodoo was so unexpected and has been praised so much by reviewers I think Chevy knows they have to step it up and do something different for the Z/28. Ford raised the bar and I think people will be really disappointed if there isn't something special in the works for the Z/28 engine. __________________

05-21-2016, 11:38 AM	#21
DenverTaco07 Drives: 2017 SS 1LE, 2017 Volt, 2013 Pilot Join Date: May 2014 Location: Colorado Posts: 4,274	all good posts... my guess is LT4 but on the other hand GM seems willing and capable of blowing our minds so who freakin knows. __________________ 2017 SS 1LE \| HBM \| Vortech V3-Si supercharger (620RWHP and 575ft lbs) \| PDR \| Black Bowties \| Illuminated Front Black Bowtie \| Illuminated Door Sills \| Smoked Tails \| vented seats mod

05-21-2016, 11:53 AM	#22
90503 Drives: 2011 2SS/RS LS3 Join Date: Nov 2011 Location: Torrance Posts: 14,426	Sticking with LT4 prediction....The game is for the fastest track weapon....That's heritage enough for the Z/28....FI's time has come. It's still Chevy/GM. A brand new, very low volume, super-car unique engine still isn't in their mind-set. Maybe there is something in the skunk-works for a future mid-engine Corvette in a few more years. I think it's just too soon for the Z/28 if it comes out in the 50th anniversary year, which it should. A slightly bumped up LT1 for the Z/28? I don't think so. That should be saved for a 1LE or re-fresh SS upgrade. A very high hp N/A v-8? They tried that road and had to turn around. I don't think they will build an in-betweener engine that can't keep up with the ZL-1 just to say that it's N/A. The volume of Z/28 units just isn't/won't be there to justify a unique engine. We'll see, though!...Happy guessing! Last edited by 90503; 05-21-2016 at 12:45 PM.

05-20-2016, 10:39 PM	#18
Tractionless Drives: '03 Silverado Join Date: Jun 2015 Location: Edinburg, Texas Posts: 52	Z/28 exclusive, all aluminum, DOHC, 32V, 427ci, V8 in the neighborhood of 600hp. Voodoo whoo?

05-21-2016, 07:13 AM	#19
oakaro68 Drives: 2015 Camaro Z/28 Join Date: Aug 2010 Location: San Antonio, TX Posts: 410 View My Garage	How does everyone feel about the idea of overhead cams? I know they experimented with that on the 90's ZR1, but moving away from the cherished old school pushrod design might indicate the beginning of the end of the pushrod for GM performance

05-21-2016, 09:16 AM	#20
233 Drives: I have a bike. Join Date: Aug 2015 Location: IN Posts: 87	8 liter v10 hahahahahaha

05-21-2016, 06:04 PM	#25
Posaune Drives: Four wheels and an engine Join Date: Sep 2014 Location: Garage Posts: 363	If it truly is N/A, I can think of four possible displacements, three of which are based on current production offerings: 1) 6.2 LT1 based - hotter cam and allowed to rev more 2) 5.3 L83 based - would have to be allowed to rev very high (same 96MM Bore and 92MM stroke as the L83 3) 5.7 using the 99.6MM bore and 92MM stroke for the GenV based LV3 4.3L V6. 4) 7.0 Same 104.8MM Bore and 101.6MM stroke as the LS7. This is the only bore/stroke combo that isn't currently in production Could the smaller displacement options be configure to allow the RPMs above 7000?

05-21-2016, 06:14 PM	#27
Bhobbs Drives: 2015 SS 1LE Red Hot, 1970 Chevelle Join Date: Apr 2012 Location: Chino, CA Posts: 6,989	A 5.3 liter isn't going to make 500 hp. The 5.2 voodoo is DOHC and has to spin to 7500 to make that much power. __________________

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