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11-09-2017 | #1 | |
Join Date: Dec 2003
Location: Chicagoland,IL
Posts: 2,679
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Re: C7 ZR breaks cover
Quote:
Hans You left out that your LS3 is 376 cubic inches. An LT5 350 CI can also make 400RWHP with intake porting and newer CATS/ exhaust. Lets compare apples to apples. I'm in the process of building a 391ci LT5 looking to get close to 550+RWHP then we can compare torque thru the entire power band. We are getting the same HP numbers out of the LT5 as any LS based motor (apples to apples) with 30 year old technology and an ECM that has less technology then your old flip phone now imagine if we can add VVT etc. DOHC TT mid engine priced out of reach compared to what? I don't see to many 800+hp cars for $100,000- $150,000 Pete
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'91 #1635 PoloGreen 350 LT5 11.09 @ 129.27 11.04 @ 128.86 474RWHP 400RWTQ http://www.youtube.com/watch?v=SFNFOhGGlR4 http://www.youtube.com/watch?v=ZlRIOMwaDYY https://sites.google.com/site/peteszr1garage |
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11-11-2017 | #2 | |
Join Date: Jun 2005
Location: CenCoast California
Posts: 899
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Re: C7 ZR breaks cover
Quote:
The new (and apparently much-hated) LT5 makes 755 SAE net horsepower from 376 cubic inches. Even with the supercharger on it, it weighs less than fully-dressed LT5. So, the new LT5 has less displacement, is smaller on the outside, is lighter and makes almost 80 more horsepower than a 391 built with the most modern resources one can bring to the original LT5. It also meets GM durability schedules and passes Federal emissions standards. A year or so ago info "leaked" out of GM implying that the "new" LT5 was going to be a 6.2 L DOHC NA engine but clearly that was "fake news". Nevertheless, one can only wonder if GM Global Propulsion Systems is working on a DOHC 6.2 (LT6 or L88?) for the coming "mid-engine car." I'm looking forward to seeing credible power and torque dyno numbers from Pete's 670-hp 391. Are you going to post that info when it becomes available, Pete?
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Hib Halverson Technical Writer former owner 95 VIN 0140 current owner 19 VIN 1878 Last edited by Hib Halverson; 11-12-2017 at 03:14 PM. |
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11-11-2017 | #3 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,700
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Re: C7 ZR breaks cover
Here’s Mercury Marine showing how u make 750hp NA using LS architecture w a an engine footprint no latger than an LS7. Its as compact and as low as an LS 7 motor using in block cam. It is an LS7 w DOHC Cylinder heads. No FI needed for what is new gen LT5 power. Don’t think anyone could argue w MMR reliability and durability.
http://www.thedrive.com/video/11943/...xid=emailshare
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
11-08-2017 | #4 |
Join Date: Apr 2007
Location: Northern VA
Posts: 2,657
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Re: C7 ZR breaks cover
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Phil Wasinger 1994 Torch Red ZR-1 WAZOO Member George Braml Intake |
11-08-2017 | #5 |
Join Date: Jan 2017
Location: US
Posts: 233
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Re: C7 ZR breaks cover
Really though the c4 Zr1 was not an every man car being almost twice as expensive as a base Corvette.
Sent from my XT1585 using ZR-1 Net Registry mobile app |
11-08-2017 | #6 | |
Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
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Re: C7 ZR breaks cover
Quote:
H
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90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. Last edited by Ccmano; 11-08-2017 at 08:37 PM. |
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11-08-2017 | #7 |
Join Date: Jul 2017
Location: West Chester, PA
Posts: 378
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Re: C7 ZR breaks cover
There might be other ZR-1s, and we may witness the rebirth of the LT-5 (since GM is so fond of recycling engine codes), but there's only 1 King of The Hill!
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11-08-2017 | #8 |
Join Date: May 2007
Location: Chicagoland, IL
Posts: 9,700
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Re: C7 ZR breaks cover
Hans,
U know and I know that the Corvette will never be taken seriously until it gets a proper powerplant, which today would include a hybrid. But a truck motor ain’t going to get the job done. Its why McLellan did what he did. U can get prodigious amounts of torque from a diesel motor too but .... Any thought of producing a mid engine will need to include a modern motor configuration full stop otherwise its a Fiero.
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[SIGPIC][/SIGPIC]Former Membership Chairman Former ZR-1 Registry - BOD 1972 Corvette 4speed base Coupe SOLD long time ago 1984 Corvette Z-51/4+3 SOLD 1992 Corvette ZR-1 Aqua/Gray #474 SOLD 1992 Corvette ZR-1 Black Rose/Cognac #458 2014 Honda VFR Interceptor DX |
11-11-2017 | #9 |
Join Date: Jun 2013
Location: Toronto
Posts: 783
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Re: C7 ZR breaks cover
Im dissapointed in how GM is recycling designations for their engines. It makes for a mess and people will begin to talk about it much more very soon. Now theres a genii LT1 and LT4 and a current LT1/4 and now LT5... what a mess.
Styling wise I think its right on par with current manufacturers that are all about excess flares, scoops and spoilers. Clearly Pontiac was a few decades too early My guess is the dohc engine for the C8 will be a 4L, compact with twin turbos or a supercharger. Hopefully mid engine as well. Leaving the C4 ZR-1 the only DOHC Front engined corvette ever |
11-12-2017 | #10 |
Join Date: Sep 2010
Location: Bethany, CT
Posts: 119
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Re: C7 ZR breaks cover
Finally unveiled.
Fastest, Most Powerful Vette Ever With two wings and a top speed of more than 210 mph, the ZR1 is a supercharged superstar 755 horses and 715 lb-ft of torque from its supercharged, 6.2-liter LT5 V-8 engine, with a top speed in excess of 210 mph. There are no 0-60 mph or quarter mile claims yet, but expect mid to high twos to 60 and mid 10s in the quarter. |
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