LT5 with velocity stacks spun to 9200 RPM! - ZR-1 Net Registry Forums

bdw18_123 · 01-29-2012

Just came across this video of an LT5 with velocity stacks on an engine dyno that the poster says was spun to 9200 RPM.

Maybe you guys have seen it, but I thought I'd post it anyway. Here is the info on the engine that is in the description:

"LT5 C4 ZR1 engine spun up to 9200rpm. Engine was built by Bonefied Customs and runs Bigstuff3 as the management system. Made 550hp and 450ftlbs at 8500rpm. Engine was destroked to a 5.0L to run at the Bonneville salt flats in the D/GT class. Enjoy!"

Why did they need to destroke it to run at Bonneville? And I thought the timing chains couldn't handle RPMs much past 8K?

Wow, what a sound! Crank up the volume...

http://www.youtube.com/watch?v=x2T3A...eature=related

Daniel_Mc · 01-29-2012

Isn't that the one Lee posted a while back?

RHanselman · 01-30-2012

Did you notice the lack of an oil pan... must be a dry sump...

LGAFF · 01-30-2012

Ron,

Note post #7 same comment...this engine I believe was built by Rippie as was the stand alone ECM.....Rippie had a dry sump setup on some of his LT-5 race car and that makes sense that this does not either.

The LT-5 inability to run over 8K was related to oiling on the lower end....when the car would hit 8K, pressure was pushing the oil to the top 1/2 of the motor, resulting in failure...the weakness was not a chain issue. I tried calling these folks awhile back and no one picked up....also tried conecting with them on FB.

http://www.zr1.net/forum/showthread.php?t=15864

bdw18_123 · 01-30-2012

Oops, forgot that Lee posted that, sorry for posting it again guys.

Hib Halverson · 01-30-2012

What are they using for cam chains and sprockets?

LGAFF · 01-30-2012

I assume stock

scholtmj · 02-20-2012

Interesting comment! I thought Fastlane was the only one to try solid lifters? Can't make it to Detroit this weekend, maybe someone from the east side of the state could attend?

The engine has a Stock Car Products dry sump pump with a Peterson tank. The internal mods are Crower custom billet steel cams, Supertech solid lifter buckets, a Bryant billet 3" stroke crankshaft, Oliver billet rods and JE pistons. It also has a custom Bonefied billet front cover, billet aluminum oil pan and a Lotus Aardvark intake and injectors. If you want to know more about it the car is going to be at the upcoming Detroit Autorama this weekend.

LGAFF · 02-20-2012

They tested a high HP solid lifter for one of the open road events....built at Mercury but it below up on the dyno...some of the race cars ran solid lifters

Tyler Townsley · 02-21-2012

Here is the first one.

01-29-2012	#1
bdw18_123 Join Date: Apr 2009 Location: Prather, CA Posts: 804	LT5 with velocity stacks spun to 9200 RPM! Just came across this video of an LT5 with velocity stacks on an engine dyno that the poster says was spun to 9200 RPM. Maybe you guys have seen it, but I thought I'd post it anyway. Here is the info on the engine that is in the description: "LT5 C4 ZR1 engine spun up to 9200rpm. Engine was built by Bonefied Customs and runs Bigstuff3 as the management system. Made 550hp and 450ftlbs at 8500rpm. Engine was destroked to a 5.0L to run at the Bonneville salt flats in the D/GT class. Enjoy!" Why did they need to destroke it to run at Bonneville? And I thought the timing chains couldn't handle RPMs much past 8K? Wow, what a sound! Crank up the volume... http://www.youtube.com/watch?v=x2T3A...eature=related

01-29-2012	#2
Daniel_Mc Join Date: Jan 2007 Location: Pineville, LA Posts: 584	Re: LT5 with velocity stacks spun to 9200 RPM! Isn't that the one Lee posted a while back?

01-30-2012	#3
RHanselman Join Date: Jul 2005 Location: Cresson, TX Posts: 970	Re: LT5 with velocity stacks spun to 9200 RPM! Did you notice the lack of an oil pan... must be a dry sump...

01-30-2012	#4
LGAFF Join Date: Mar 2007 Location: Crystal Lake, IL Posts: 7,180	Re: LT5 with velocity stacks spun to 9200 RPM! Ron, Note post #7 same comment...this engine I believe was built by Rippie as was the stand alone ECM.....Rippie had a dry sump setup on some of his LT-5 race car and that makes sense that this does not either. The LT-5 inability to run over 8K was related to oiling on the lower end....when the car would hit 8K, pressure was pushing the oil to the top 1/2 of the motor, resulting in failure...the weakness was not a chain issue. I tried calling these folks awhile back and no one picked up....also tried conecting with them on FB. http://www.zr1.net/forum/showthread.php?t=15864 __________________ LGAFF 90 #966-150K miles-sold 92 #234-sold 1987 Callaway TT #17 1991 ZR-1 #1359

01-30-2012	#5
bdw18_123 Join Date: Apr 2009 Location: Prather, CA Posts: 804	Re: LT5 with velocity stacks spun to 9200 RPM! Oops, forgot that Lee posted that, sorry for posting it again guys.

01-30-2012	#6
Hib Halverson Join Date: Jun 2005 Location: CenCoast California Posts: 898	Re: LT5 with velocity stacks spun to 9200 RPM! What are they using for cam chains and sprockets? __________________ Hib Halverson Technical Writer former owner 95 VIN 0140 current owner 19 VIN 1878

02-20-2012	#8
scholtmj Join Date: Nov 2008 Location: Grand Rapids, MI Posts: 382	Re: LT5 with velocity stacks spun to 9200 RPM! Interesting comment! I thought Fastlane was the only one to try solid lifters? Can't make it to Detroit this weekend, maybe someone from the east side of the state could attend? The engine has a Stock Car Products dry sump pump with a Peterson tank. The internal mods are Crower custom billet steel cams, Supertech solid lifter buckets, a Bryant billet 3" stroke crankshaft, Oliver billet rods and JE pistons. It also has a custom Bonefied billet front cover, billet aluminum oil pan and a Lotus Aardvark intake and injectors. If you want to know more about it the car is going to be at the upcoming Detroit Autorama this weekend.