Flat Plane Crank LT5 - Page 5 - ZR-1 Net Registry Forums

A26B · 06-27-2016

Sam is correct, the stroke is stock.

mgbrv8 · 06-27-2016

Thank you for the correction

Dave

Quote:

Originally Posted by SAM/CH ZR-1

No Dave

The engine run with a stock 93 mm stroke.

tpepmeie · 06-27-2016

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.

SAM/CH ZR-1 · 06-28-2016

For the next race season we plan to go with another bore x stroke configuration and increase the max. rpms up to 10'000.

Fully Vetted · 06-28-2016

OMG…I'm going deaf just thinking about it.

Sent from my iPhone using ZR-1 Net Registry

A26B · 06-28-2016

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

Paul Workman · 06-28-2016

Quote:

Originally Posted by A26B

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!!

WARP TEN · 06-28-2016

Excellent and simple explanation that is made even more clear by the video. --Bob

Quote:

Originally Posted by ZRapid-1

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.)

spork2367 · 06-28-2016

Such a cool build.

FU · 06-28-2016

That is some setup on the Opel. Driver is right on target.

06-27-2016	#41
A26B Join Date: Dec 2003 Location: Arcadia,OK Posts: 3,394	Re: Flat Plane Crank LT5 Sam is correct, the stroke is stock. __________________ Jerry Downey 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.

06-27-2016	#43
tpepmeie Join Date: Aug 2005 Location: Fishers, IN Posts: 815	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. __________________ Todd ____________________________________ *** our email address has changed! info@pepmeierengines.com pepmeierengines.com Friend us on Facebook too: www.facebook.com/profile.php?id=100011443683384 Pepmeier Engine Development

06-28-2016	#44
SAM/CH ZR-1 Join Date: Jul 2005 Location: Basel/Switzerland Posts: 152	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. __________________ Sam DR.Z/LT5-Performance 1990 #1822 with 383 cui

06-28-2016	#45
Fully Vetted Join Date: Sep 2012 Location: Rockwall, Tx Posts: 1,510	Re: Flat Plane Crank LT5 OMG…I'm going deaf just thinking about it. Sent from my iPhone using ZR-1 Net Registry __________________ _________________ 1994 AB/Grey #141 430 RWHP/392 RWTQ FBI Lyposuction / Secondaries relieved of duty / SW Long Tube Headers / Corsa Exhaust / FIC SS Injectors / MSD Coils / Lightweight Pulleys / Corey tuned B & M Shifter / Aluminum Flywheel / Samco Hoses / Shelby Series One's / C4 No Flex Frame Stiffener BBC - Bling By Carter: Custom ZR-1 Center Caps / Custom Plenum Plate / Air Box Knobs / TB Cover / Oil Filter Cover

06-28-2016	#46
A26B Join Date: Dec 2003 Location: Arcadia,OK Posts: 3,394	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 __________________ Jerry Downey 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.

06-28-2016	#49
spork2367 Join Date: Jun 2013 Location: PA Posts: 879	Re: Flat Plane Crank LT5 Such a cool build.

06-28-2016	#50
FU Join Date: Mar 2004 Location: Found Member Posts: 4,346	Re: Flat Plane Crank LT5 That is some setup on the Opel. Driver is right on target. __________________ Frank Urbo. NCM Lifetime member # 982 Registry Founding # 237