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LS-1 double overhead cam engine?

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Old Oct 16, 2008 | 03:31 PM
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St. Jude Donor '09-'11-'12-'13-'14
Default LS-1 double overhead cam engine?

Supposedly these were made for some kind of one-off racing class in a Cobra body, and supposedly GM built them.

I have a chance to buy one cheap, and I need whatever info I can find.

Thanks, Dave
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Old Oct 16, 2008 | 04:24 PM
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If it was a dual overhead cam theres no way it would be an LS1 black.
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Old Oct 16, 2008 | 04:53 PM
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The LT5 used in the '90 - '91 ZR1 is a double overhead cam motor. Designed by Lotus and manufactured and assembled by Mercury Marine.
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Old Oct 16, 2008 | 04:58 PM
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Originally Posted by ssmith512
The LT5 used in the '90 - '91 ZR1 is a double overhead cam motor. Designed by Lotus and manufactured and assembled by Mercury Marine.
I always thought the ZR1 was a 4 cam 32 valve motor.
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Old Oct 16, 2008 | 05:01 PM
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I always thought the ZR1 was a 4 cam 32 valve motor
It is. ('90-'95 ZR1 we're talking about here...)

If you have a V engine with two heads, 4 cam and double overhead cam are synonymous. (2 overhead cams per head x 2 heads = 4 cams total)
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Old Oct 16, 2008 | 05:01 PM
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Here ya go.............................

LS1 With DOHC, 4 valves per cylinder
































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Old Oct 16, 2008 | 05:01 PM
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Originally Posted by ssmith512
The LT5 used in the '90 - '91 ZR1 is a double overhead cam motor. Designed by Lotus and manufactured and assembled by Mercury Marine.
Originally Posted by 1sickz51vette
I always thought the ZR1 was a 4 cam 32 valve motor.
You're both right. It was a 4 cam, 32 valve motor designed by Lotus and manufactured by Mercury Marine.

Back on topic, I did hear rumors about a 4 valve head for LS motors, but never saw any pics or heard anything more about them. Anybody know if some were ever made?
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Old Oct 16, 2008 | 05:05 PM
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Originally Posted by 1sickz51vette
I always thought the ZR1 was a 4 cam 32 valve motor.
Yes it is.

There is also a company that makes 32 valve heads for the LSx block.

http://www.araoengineering.com/LSX.htm
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Old Oct 16, 2008 | 05:16 PM
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The engine is new, has heads like ARAO engineering shows on their site, and I can buy it for 2K. I am still looking for more info if anyone has it.
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Old Oct 16, 2008 | 05:41 PM
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Never seen or heard about it
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Old Oct 16, 2008 | 05:49 PM
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Originally Posted by MIKE-C5
Never seen or heard about it
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Old Oct 16, 2008 | 05:54 PM
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Originally Posted by claysmoker
The engine is new, has heads like ARAO engineering shows on their site, and I can buy it for 2K. I am still looking for more info if anyone has it.
why can you buy it so cheap, and what the hell are you waiting for?
If I could buy those heads alone for $2k I would do it in a minute and to hell with what the rest of it is.
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Old Oct 16, 2008 | 06:24 PM
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The guy had 3 of them, and has only one left. He sold the other 2 for 5K each, but is really having $ problems and I'm in the right place/right time for a change. I'm usually 10 minutes late on things like this.
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Old Oct 16, 2008 | 08:15 PM
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for 2k its really worth a shot just my .02$ good luck with your decision
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Old Oct 16, 2008 | 08:20 PM
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Nice, I'd like to see some dyno #s on it
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Old Oct 16, 2008 | 08:45 PM
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According to the website posted above, the heads alone sell for $7500. I would be EXTREMELY skeptical of this deal on a built engine with those heads for $2k. Unless it's stolen, it just doesn't make sense, even in this economy.
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Old Oct 16, 2008 | 09:10 PM
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Got any pics? Almost sound like an Olds Aurora (Racing?) engine.
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Old Oct 16, 2008 | 10:00 PM
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Originally Posted by Tim01Coupe
Got any pics? Almost sound like an Olds Aurora (Racing?) engine.
You guessed it! I went by to see it and it is a modified L47. 320hp. Oh well. Don't think I'll bother.
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