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LT1 vs ZR1

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Old Nov 6, 2006 | 12:13 AM
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Default LT1 vs ZR1

May I ask the differnce between LT1 and a ZR1?
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Old Nov 6, 2006 | 12:16 AM
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everything motor to the rear end of the car. http://www.zr1netregistry.com/ZR1_about.htm

the short list is:
motor
trans
wheels/tires
windshield
all the body work save the hood, front bumper, top
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Old Nov 6, 2006 | 12:22 AM
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Originally Posted by 90 Corvette ZR-1
everything motor to the rear end of the car. http://www.zr1netregistry.com/ZR1_about.htm

the short list is:
motor
trans
wheels/tires
windshield
all the body work save the hood, front bumper, top
about 100hp base, and enough technology that it took GM until 2001ish to match the hp with the Z06. The ZR1 is one bad ****
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Old Nov 6, 2006 | 12:31 AM
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OK thanks for the info...I have a 95 LT1, and just wondered did not see
ZR1 anywhere on it.
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Old Nov 6, 2006 | 01:09 AM
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LT1 is an engine.
ZR-1 is a performance package option, which has the LT-5 engine.
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Old Nov 6, 2006 | 09:33 AM
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Originally Posted by 90 Corvette ZR-1
the short list is:
motor
trans
wheels/tires
windshield
all the body work save the hood, front bumper, top
Actually, the ZF6 gearbox is the same, as I recall, as is the hood.
The top is not the same, since the CHMSL is up there on the ZR-1.


Larry
code5coupe
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Old Nov 6, 2006 | 10:17 AM
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What is CHMSL?
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Old Nov 6, 2006 | 10:36 AM
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Center High Mounted Stop Light.
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Old Nov 6, 2006 | 10:55 AM
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Originally Posted by GKK
Center High Mounted Stop Light.
I always thought that part name was WAY to long.


To the OP. Here are just the visual differences of the engine between the:

LT1 (91-96)
http://www.corvetteforum.net/c4/bcunningham/engine1.jpg

LT5 (ZR1 90-95)
http://rogerscorvette.com/spots/sep98/zr1_engine1.jpg

and just to confuse you, here is an LT4 ('96 manual only)
http://www.rogerscorvette.com/spots/aug01/engine2.jpg
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Old Nov 6, 2006 | 11:00 AM
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Originally Posted by kwik_ta
about 100hp base, and enough technology that it took GM until 2001ish to match the hp with the Z06. The ZR1 is one bad ****
Yep!

LT5=LT1x(400/300)^.5 = LT1x1.1547 or put another way, the LT5 is about 15% faster than the LT1 against the wind

LT5 = LT4x(400/355-average for LT4) = LT4x1.0615 or put another way, the LT5 is about 6% faster that the LT4 against the wind



FWIW,

P.
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Old Nov 6, 2006 | 12:19 PM
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Originally Posted by Paul Workman
Yep!

LT5=LT1x(400/300)^.5 = LT1x1.1547 or put another way, the LT5 is about 15% faster than the LT1 against the wind

LT5 = LT4x(400/355-average for LT4) = LT4x1.0615 or put another way, the LT5 is about 6% faster that the LT4 against the wind



FWIW,

P.
But the ZR-1 is not quicker than a heads/cam LT1 in the 1/4, or any acceleration contest below 150mph. The ZR-1 weighs more and it's easy to get 400+ HP from any mild upgrade to an LTx.

The LT5 design lives on as the Cadillac Northstar engine.

And so the argument rages on.
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Old Nov 6, 2006 | 12:26 PM
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The LT5 made the LT1, at least, that's what Corvette Magazine told me at breakfast...
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Old Nov 6, 2006 | 12:30 PM
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Originally Posted by FELNGR8
it's easy to get 400+ HP from any mild upgrade to an LTx.

I suppose it depends on your definition of "easy".

If simply writing a nice, fat check is "easy", then, yes, I suppose it is.


Larry
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Old Nov 6, 2006 | 12:46 PM
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Originally Posted by rocco16

I suppose it depends on your definition of "easy".

If simply writing a nice, fat check is "easy", then, yes, I suppose it is.


Larry
code5coupe
If you look at the ZR1 option package cost, it's not that fat of a check to write.
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Old Nov 6, 2006 | 12:51 PM
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Originally Posted by JCD
The LT5 made the LT1, at least, that's what Corvette Magazine told me at breakfast...

The LT4 was based on the feedback and knowhow of the LT5...thats the way I understod it anyway....
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Old Nov 6, 2006 | 01:15 PM
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Gueuss this was a good question after all.
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Old Nov 6, 2006 | 01:38 PM
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Originally Posted by rocco16

I suppose it depends on your definition of "easy".

If simply writing a nice, fat check is "easy", then, yes, I suppose it is.


Larry
code5coupe
Well, I don't have the skill or tools to port my heads myself,.... but that check was only $4500. To a speed shop that builds race engines, not to a big name Vette tuner.

Another 2 grand for headers, cats, and custom exhaust. I did wrench the headers and a few other things.

For a fact the Hotcam with pocket ported LT1 heads is enough to pull on a ZR-1.

But my car will never have the WOW factor or high value of a ZR-1.
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Old Nov 6, 2006 | 03:44 PM
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Originally Posted by FELNGR8
Well, I don't have the skill or tools to port my heads myself,.... but that check was only $4500. To a speed shop that builds race engines, not to a big name Vette tuner.

Another 2 grand for headers, cats, and custom exhaust. I did wrench the headers and a few other things.

For a fact the Hotcam with pocket ported LT1 heads is enough to pull on a ZR-1.

But my car will never have the WOW factor or high value of a ZR-1.
But... you're able to drive and enjoy your LT1 and not have to worry about accident repair, long discontinued parts, etc. that a lot of the ZR1 guys have to worry about. But yes...the "King" is still that, IMO.
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Old Nov 6, 2006 | 04:04 PM
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Originally Posted by RacerX70CC
But... you're able to drive and enjoy your LT1 and not have to worry about accident repair, long discontinued parts, etc. that a lot of the ZR1 guys have to worry about. But yes...the "King" is still that, IMO.
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Old Nov 6, 2006 | 04:59 PM
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for 36+k you got a 100 more hp AND you couldnt get it in a vert. you did get a bunch zr1 emblems, though......whoopee.
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