LT5 with velocity stacks spun to 9200 RPM!

[bdw18_123]

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]

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

[RHanselman]

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

[LGAFF]

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]

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

[Hib Halverson]

What are they using for cam chains and sprockets?

[LGAFF]

I assume stock

[scholtmj]

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]

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]

Here is the first one.