rocker arm stud diflection
#21
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iTrader: (3)
The head has issues. It's not a myth. When you use a rocker arm the geometry is always wrong that's why there is a pattern/ sweep. What's your point? You walk on water. Have a magic wand you can wave over a valve train and it becomes perfect. Not sure what you are getting at. I on the other hand was simply trying to give the OP I different idea than what was posted by others as what to look for.
#23
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iTrader: (4)
I have seen a broken boss as stated by Black Baja on a Pro1 head. This head had the wrong rocker studs in the head. The PRO1's need the longer stud that protrudes past the boss and into the head. ARP has a special part# for Pro1 heads.
Dart:
"ROCKER ARM STUDS
All Dart big block heads use an exhaust rocker arm stud with an increased thread length where it is installed in the cylinder head. It has a 1.300” thread length for the raised rocker arm boss. Do Not Use a Shorter Length. Part# Dart 27002204 exhaust stud Dart 27002223 intake stud ARP 235-7202 Kit"
https://www.google.com/url?sa=t&sour...iBCVp6GJwPbuHg
Dart:
"ROCKER ARM STUDS
All Dart big block heads use an exhaust rocker arm stud with an increased thread length where it is installed in the cylinder head. It has a 1.300” thread length for the raised rocker arm boss. Do Not Use a Shorter Length. Part# Dart 27002204 exhaust stud Dart 27002223 intake stud ARP 235-7202 Kit"
https://www.google.com/url?sa=t&sour...iBCVp6GJwPbuHg
#24
Registered
iTrader: (3)
I have seen a broken boss as stated by Black Baja on a Pro1 head. This head had the wrong rocker studs in the head. The PRO1's need the longer stud that protrudes past the boss and into the head. ARP has a special part# for Pro1 heads.
Dart:
"ROCKER ARM STUDS
All Dart big block heads use an exhaust rocker arm stud with an increased thread length where it is installed in the cylinder head. It has a 1.300” thread length for the raised rocker arm boss. Do Not Use a Shorter Length. Part# Dart 27002204 exhaust stud Dart 27002223 intake stud ARP 235-7202 Kit"
https://www.google.com/url?sa=t&sour...iBCVp6GJwPbuHg
Dart:
"ROCKER ARM STUDS
All Dart big block heads use an exhaust rocker arm stud with an increased thread length where it is installed in the cylinder head. It has a 1.300” thread length for the raised rocker arm boss. Do Not Use a Shorter Length. Part# Dart 27002204 exhaust stud Dart 27002223 intake stud ARP 235-7202 Kit"
https://www.google.com/url?sa=t&sour...iBCVp6GJwPbuHg
#27
Registered
iTrader: (3)
I have seen a broken boss as stated by Black Baja on a Pro1 head. This head had the wrong rocker studs in the head. The PRO1's need the longer stud that protrudes past the boss and into the head. ARP has a special part# for Pro1 heads.
Dart:
"ROCKER ARM STUDS
All Dart big block heads use an exhaust rocker arm stud with an increased thread length where it is installed in the cylinder head. It has a 1.300” thread length for the raised rocker arm boss. Do Not Use a Shorter Length. Part# Dart 27002204 exhaust stud Dart 27002223 intake stud ARP 235-7202 Kit"
https://www.google.com/url?sa=t&sour...iBCVp6GJwPbuHg
Dart:
"ROCKER ARM STUDS
All Dart big block heads use an exhaust rocker arm stud with an increased thread length where it is installed in the cylinder head. It has a 1.300” thread length for the raised rocker arm boss. Do Not Use a Shorter Length. Part# Dart 27002204 exhaust stud Dart 27002223 intake stud ARP 235-7202 Kit"
https://www.google.com/url?sa=t&sour...iBCVp6GJwPbuHg
I have many many friends running Dart Pro 1's, or race series heads. From mild 600hp marine engines, to 1000+hp blown marine engines, for years, that have not had any issues.