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Old 09-18-2012, 04:41 PM   #239
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Originally Posted by OldScoolCamaro View Post
....and, 1970 through 1974 SHP SBC's used in Z-28's were the identical SHP SBC 350 CID's used in Corvette's. So, there is a precident set in sharing motors between the two. Let's share the LS7 with a new '14 Z-28, shall we....?
Sharing is nice.
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Old 09-25-2012, 02:34 PM   #240
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Originally Posted by OldScoolCamaro View Post
....and, 1970 through 1974 SHP SBC's used in Z-28's were the identical SHP SBC 350 CID's used in Corvette's. So, there is a precident set in sharing motors between the two. Let's share the LS7 with a new '14 Z-28, shall we....?
yes, yes, yes... imagine the badge:

Z28
505hp
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Old 09-30-2012, 03:27 PM   #241
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I feel some on here need to purchase Netflix and watch what started it all......
The Z28 was the top of the heap in its date winning drag and road races.....
It got like the GTR is today where champion drag races were between two Z28's.....
Watch this series.....
http://movies.netflix.com/WiPlayer?m...&trkid=3326878
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Old 09-30-2012, 04:56 PM   #242
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I feel some on here need to purchase Netflix and watch what started it all......
The Z28 was the top of the heap in its date winning drag and road races.....
It got like the GTR is today where champion drag races were between two Z28's.....
Watch this series.....
http://movies.netflix.com/WiPlayer?m...&trkid=3326878
Some of us don't need to join Netflix and watch the movies/shows, we were there when it happened back in the day.
Clyde
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Old 10-01-2012, 10:47 AM   #243
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...that's because you are an OG Clyde...
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Old 10-01-2012, 11:32 AM   #244
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Originally Posted by OldScoolCamaro View Post
....and, 1970 through 1974 SHP SBC's used in Z-28's were the identical SHP SBC 350 CID's used in Corvette's. So, there is a precident set in sharing motors between the two. Let's share the LS7 with a new '14 Z-28, shall we....?
Didn't the Vetts '69/'70 have the TRW dome forged pistons where the camaro had the flat top TRW forged pistons. This would bump up the compression to 11:1.

Also I'm not sure if it was stated or not... the Z28 was the build code name and the SS had a z27 build code. These were stamped on the cowl tag.
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Old 10-01-2012, 11:58 AM   #245
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The 1970 Corvette HP small block was the LT1, same as in the 1970 1/2 Z-28. Both were identical 11:1 CR. After that CR's dropped to 9:1. Without going into exact specs, that can be easily looked up at nastyZ28.com (the best website to research early Camaro's, RPO's, specs etc..), '71 through '74 also shared the exact same 350 SHP engine configuration. The bottom ends were identical from '70-'74, only the heads, cam, intake and carb combination changed. '71 and '72 were the same as '70, but were 9:1 CR, '73 and '74 were 9:1 CR, but dropped the solid lifter cam, aluminum dual plane intake and Holley for a hydraulic cam, cast iron QJ intake and QJ carb. But each motor was identical (LT1 which changed to L82) for both. Replacement LT1 and L82 short blocks (only difference between the two was CR)and parts were available up to mid 1980's from the GM parts counter. The Z28 and Z27 RPO didn't initially show up on the cowl tag until after 1970 as I recall. My memory is growing foggier as I get older...but the website is a must read if you get a chance.
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Old 10-01-2012, 12:15 PM   #246
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'70 Vette LT1 rated 370 hp...better flowing exhaust
'70 Z/28 LT1 rated 360 hp.
As mentioned, internally the same.
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Old 10-01-2012, 12:20 PM   #247
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...it was rumored exhaust, but also it had to be "more" because the 'Vette's had to be more..you know...
'71-'72 Z-28 was 330 BHP due to drop in CR by 2 points.
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Old 10-01-2012, 12:25 PM   #248
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Maybe...but the Vette had "true" duals, while the Camaro was saddled with a single transverse dual-in/dual-out muffler, which no doubt ate some zip from the ZEE.
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Old 10-01-2012, 12:28 PM   #249
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Maybe...but the Vette had "true" duals, while the Camaro was saddled with a single transverse dual-in/dual-out muffler, which no doubt ate some zip from the ZEE.
...touche! Very good sir...!
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Old 10-01-2012, 04:08 PM   #250
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...it was rumored exhaust, but also it had to be "more" because the 'Vette's had to be more..you know...
'71-'72 Z-28 was 330 BHP due to drop in CR by 2 points.
Dumb question possibly, someone please correct me if I am wrong.

Lot of people here and in autoworld say the Camaro can't have more HP than the Vette,

I see here that even though engines were identical( in the 70 -74 cars), the Vette was rated higher. IIRC wasn't the highest rated ( or advertised HP) corvette 435HP

So if the Corvette had to have the highest HP how did the 70 Chevelle get away with its advertised 450HP in the LS6 454
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Old 10-01-2012, 05:02 PM   #251
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Dumb question possibly, someone please correct me if I am wrong.

I see here that even though engines were identical( in the 70 -74 cars), the Vette was rated higher. IIRC wasn't the highest rated ( or advertised HP) corvette 435HP

So if the Corvette had to have the highest HP how did the 70 Chevelle get away with its advertised 450HP in the LS6 454
Apples 'n oranges...

The 435hp L71 427 '67-'69 Corvette was the "highest Factory-RATED" Corvette...but NOT the most powerful. "Ratings" and "actual" didn't always correlate. The L-88 and ZL-1 Corvettes were rated 430 hp...at something like 5200 rpm, well below their 6000+ power peak. And the L71 (also available with aluminum heads as option L89 in '69) was a Corvette-only option.

The '70 LS6 454-450hp engine offered in the Malibu was NOT offered in the Corvette.

The LS6 454-425hp Corvette engine of 1971 was essentially a lower compression L-88 with 27 more cubes.

In early '70 literature, mention was made of an LS7 Corvette engine, a 454" version of the high-comp L-88 rated at 460hp, but emissions issues meant it never made production...

http://oldcarbrochures.org/index.php...vette-R1-06-07

Last edited by LOWDOWN; 10-01-2012 at 05:31 PM.
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Old 10-02-2012, 11:24 AM   #252
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So basically they "got away" with it bc that engine was not offered in the Vette. Got it.

The L-88 Corvette actually made something like 560HP didnt it?
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