Aftermarket Iron Heads
02-07-2011, 05:47 PM
#1
Thread Starter
Join Date: Feb 2011
Location: Texas
Posts: 2
Aftermarket Iron Heads
Are there any aftermarket iron heads that DON'T have stud mount rockers? I know alot of people like them for better roller rockers, but I'd prefer to stay away from them if possible. I've checked out Dart and World and even RHS but can't find anything with pedestal mounts. Any help would be greatly appreciated. Thanks!
02-09-2011, 10:23 PM
#7
Thread Starter
Join Date: Feb 2011
Location: Texas
Posts: 2
Hey thanks for the quick reply, the reason I was curious about stud mounts is because my understanding was that stud mount rockers need frequent adjusting. Not bashing stud mounts or anyting, I'm just new to the concept and don't know too much about them or properly adjusting them. I already have GT40s but was looking for something that produced a bit more power and was hoping to stay with iron heads to save money. Stud mounts aren't a big deal after all? Like I said, I'm new to these. Thanks again for the help everyone.
02-10-2011, 02:08 AM
#8
6th Gear Member
Join Date: Apr 2007
Location: California
Posts: 10,468
Stud mounts shouldn't need constant adjusting unless something wasn't set right(locks are too loose) or something is wearing.
That said, people underestimate pedestal mounts. They're actually a very stable platform and flex less than a lot of studs do(except for large studs made with high end steels). But the smaller capscrew can fail under heavy spring loads, the smaller shaft diameter means less total tensile load capability. So they're not a good idea in something using high spring pressures.
And just as an FYI, GM's LS7 engine uses pedestal mount from the factory with an 8mm capscrew(which is the metric equivalent of 5/16" that ford pedestals use).....on an engine with a 7,000rpm redline and a huge 1.8 rocker ratio and large valves(though they are titanium which helps with valve mass).
Studs are generally preferred because they're more easily adjusted.
That said, people underestimate pedestal mounts. They're actually a very stable platform and flex less than a lot of studs do(except for large studs made with high end steels). But the smaller capscrew can fail under heavy spring loads, the smaller shaft diameter means less total tensile load capability. So they're not a good idea in something using high spring pressures.
And just as an FYI, GM's LS7 engine uses pedestal mount from the factory with an 8mm capscrew(which is the metric equivalent of 5/16" that ford pedestals use).....on an engine with a 7,000rpm redline and a huge 1.8 rocker ratio and large valves(though they are titanium which helps with valve mass).
Studs are generally preferred because they're more easily adjusted.
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