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Old 06-27-2016   #41
A26B
 
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Default Re: Flat Plane Crank LT5
Sam is correct, the stroke is stock.
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Old 06-27-2016   #42
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Default Re: Flat Plane Crank LT5
Thank you for the correction

Dave

Quote:
Originally Posted by SAM/CH ZR-1 View Post
No Dave

The engine run with a stock 93 mm stroke.
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Old 06-27-2016   #43
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Default Re: Flat Plane Crank LT5
Again, Great job by all involved. Did you dyno it before installation?

I am itching to do one of these. Although slightly different dimensions. Wish one of you ZR-1 brothers would win the Mega Millions tomorrow and pony up the cash for the ultimate LT5. I've got the crankshaft sourced and the cams to go with.
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Old 06-28-2016   #44
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Default Re: Flat Plane Crank LT5
For the next race season we plan to go with another bore x stroke configuration and increase the max. rpms up to 10'000.
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Old 06-28-2016   #45
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Default Re: Flat Plane Crank LT5
OMG…I'm going deaf just thinking about it.


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Old 06-28-2016   #46
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Default Re: Flat Plane Crank LT5
Just received word from Norbert Vornholt, "First race done. Second place. All doing well engine is running good. 750HP at 8800 Revs/min."

"Here two videos of that weekend."

https://youtu.be/JpMiTX_fqgs
https://youtu.be/XGrg98-mvnE
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JERRYS LT5 GASKETS & PARTS
http://www.jerrysgaskets.com
1994 ZR-1, Black/Black, Lingenfelter Aerobody, 416cu in, 3.91 gears, coil-over susp, Brembo brakes, etc.
2016 Black-Red, 3LT-Z51 Auto 8-speed.
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Old 06-28-2016   #47
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Default Re: Flat Plane Crank LT5
Quote:
Originally Posted by A26B View Post
Just received word from Norbert Vornholt, "First race done. Second place. All doing well engine is running good. 750HP at 8800 Revs/min."

"Here two videos of that weekend."

https://youtu.be/JpMiTX_fqgs
https://youtu.be/XGrg98-mvnE
Ooooo! That goes right to my bones!! WOW!!
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Old 06-28-2016   #48
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Default Re: Flat Plane Crank LT5
Excellent and simple explanation that is made even more clear by the video. --Bob


Quote:
Originally Posted by ZRapid-1 View Post
Crossplane Crankshaft


Flat Plane Crankshaft


The Bottom Line

Crossplane Crankshaft Advantages: Smooth, vibration-free performance; distinctive American muscle car burble.
Crossplane Crankshaft Disadvantages: Heavier (harder to rev), requires larger crankcase.

Flat Plane Crankshaft Advantages: Lighter, more compact, more responsive (high-revving), better exhaust scavenging.
Flat Plane Crankshaft Disadvantages: Prone to vibration, lower torque levels.


Good video showing how the pistons move relative to each other:
https://www.youtube.com/watch?v=2AzrOPPZFzs
(Should have added exhaust sounds instead of music in the video.)
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Old 06-28-2016   #49
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Default Re: Flat Plane Crank LT5
Such a cool build.
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Old 06-28-2016   #50
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Default Re: Flat Plane Crank LT5
That is some setup on the Opel. Driver is right on target.
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