Big Chris
Member
So, for those of you who are interested.
One of red plate clones went to the 2019 Maxxis Thunder in the Valley Nationals and took second place. Andy Partridge of Khemical Khaos did the tire prep. And Mason from Keystone Heights, FL was the wheelman. Jason, Mason's father, was the crew chief, coach, and chassis setup man. Mason's invite came after winning the Big O Tribute race in Blacksburg, South Carolina. Mason also is the two time Callahan Speedway rookie champ.
So in an effort to help the little guys out there, I thought I would share some of this particular engines build components. All the parts for this build came from either the Box Stock Project or ARC Racing.
The engine block is a 2019 vintage Box Stock Engine.
The head is a #223 casting head, and as per the rule set in FL, it is an AKRA spec head w/o porting. 3 angle valve job at 30/45/60 degree. This head was cut to ensure flatness, and to set combustion chamber cc. Pro tip combustion chamber cc was not set to the minimum of 26.5cc
Piston is a stock BSP piston at stock sizing. Cylinder to piston wall clearance was set to .0035" as measured at wrist pin centerline. Rod is a stock BSP cast rod.
Top ring end gap was .018" second ring end gap was .026" and oil control ring package was stock.
Cam was a BSP4, ILC was set to my spec.
Light weight lifters, light weight retainers, and square tip rockers were used. Valve lash was set to my spec. Pro tip, valve lift was not set to the max of .238"/.242" Springs were seasoned (pre fatigued) dyno green stripes.
ARC 6689 flywheel was used, with no key. Ignition timing was set to my spec, and coil air gap was set to my spec.
ARC 6934 air filter adapter was used, and of course an ARC red plate was used. Carb jetting and blueprinting was set to my spec.
RAPP Fab thick flange weenie pipe was the header of choice and the spec RLV screw in muffler rounded out the exhaust system.
One of red plate clones went to the 2019 Maxxis Thunder in the Valley Nationals and took second place. Andy Partridge of Khemical Khaos did the tire prep. And Mason from Keystone Heights, FL was the wheelman. Jason, Mason's father, was the crew chief, coach, and chassis setup man. Mason's invite came after winning the Big O Tribute race in Blacksburg, South Carolina. Mason also is the two time Callahan Speedway rookie champ.
So in an effort to help the little guys out there, I thought I would share some of this particular engines build components. All the parts for this build came from either the Box Stock Project or ARC Racing.
The engine block is a 2019 vintage Box Stock Engine.
The head is a #223 casting head, and as per the rule set in FL, it is an AKRA spec head w/o porting. 3 angle valve job at 30/45/60 degree. This head was cut to ensure flatness, and to set combustion chamber cc. Pro tip combustion chamber cc was not set to the minimum of 26.5cc
Piston is a stock BSP piston at stock sizing. Cylinder to piston wall clearance was set to .0035" as measured at wrist pin centerline. Rod is a stock BSP cast rod.
Top ring end gap was .018" second ring end gap was .026" and oil control ring package was stock.
Cam was a BSP4, ILC was set to my spec.
Light weight lifters, light weight retainers, and square tip rockers were used. Valve lash was set to my spec. Pro tip, valve lift was not set to the max of .238"/.242" Springs were seasoned (pre fatigued) dyno green stripes.
ARC 6689 flywheel was used, with no key. Ignition timing was set to my spec, and coil air gap was set to my spec.
ARC 6934 air filter adapter was used, and of course an ARC red plate was used. Carb jetting and blueprinting was set to my spec.
RAPP Fab thick flange weenie pipe was the header of choice and the spec RLV screw in muffler rounded out the exhaust system.