Dyno results for 427 stroker with hydraulic cam 776 hp
12-14-2015, 01:54 PM
#43
On The Tree
Thread Starter
What's wrong with the guides?
12-14-2015, 02:04 PM
#44
With the tip of the rocker designed like a rocking chair, it creates a lot of side loading on the valve and guide. It gets worse with increased lift as the nose of the rocker could dig into the valve tip at max lift. Bronze guides have been known to wear excessively quick with stock rockers, so powdered metal guides are often used of reduce the guide wear or roller tip rockers.
12-14-2015, 02:12 PM
#45
On The Tree
Thread Starter
With the tip of the rocker designed like a rocking chair, it creates a lot of side loading on the valve and guide. It gets worse with increased lift as the nose of the rocker could dig into the valve tip at max lift. Bronze guides have been known to wear excessively quick with stock rockers, so powdered metal guides are often used of reduce the guide wear or roller tip rockers.
12-14-2015, 02:43 PM
#47
Don't doubt ur knowledge at all. All I can say is what I've seen from shop cars. My car makes the least amount of power of all the shop cars and all of the shop cars are using Brodix heads, bronze guides and stock rockers with trunion upgrade with no issues. And spraying much bigger shots then me. 400+
12-14-2015, 03:35 PM
#49
On The Tree
Thread Starter
I'm not doubting it, I just find it interesting. LS7 rockers have a longer pivot lenght so they may be able to handle more lift than the other LS rockers. Brodix may have even machined the rocker stands to account for stock rockers with high lift as well. It's just an interesting combo I think.
12-14-2015, 03:38 PM
#50
On The Tree
Thread Starter
From What I've heard any issues that were coming into play in street cars at around 25k. I'd be thrilled if my motor lasts for 25k miles lol. I'd take 10k of race miles lol
12-14-2015, 04:46 PM
#53
On The Tree
Thread Starter
I'm sorry brotha I don't know that info. That's way above my pay grade. Lol. They are inconnel valves
12-14-2015, 11:53 PM
#57
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This point has absolutely nothing to do with the dyno numbers...
KCS is exactly right, if you understand the geometry involved in radius tip rockers you'll see that it's incredibly likely that those guides are going to wear incredibly fast. LS or not I've seen this dozens of other times in other motors utilizing radius tip rockers, one of which is a racing program of ours where the sanctioning body requires the use of stock rocker arms(rigid shaft mount radius tip)...it's understood that no matter how perfect the scrub pattern is set up, that due to the much higher life and thus wider scrub pattern with more side forces...the guides are going to wear out very quickly.
KCS is exactly right, if you understand the geometry involved in radius tip rockers you'll see that it's incredibly likely that those guides are going to wear incredibly fast. LS or not I've seen this dozens of other times in other motors utilizing radius tip rockers, one of which is a racing program of ours where the sanctioning body requires the use of stock rocker arms(rigid shaft mount radius tip)...it's understood that no matter how perfect the scrub pattern is set up, that due to the much higher life and thus wider scrub pattern with more side forces...the guides are going to wear out very quickly.
12-15-2015, 01:11 AM
#58
On The Tree
Thread Starter
This point has absolutely nothing to do with the dyno numbers...
KCS is exactly right, if you understand the geometry involved in radius tip rockers you'll see that it's incredibly likely that those guides are going to wear incredibly fast. LS or not I've seen this dozens of other times in other motors utilizing radius tip rockers, one of which is a racing program of ours where the sanctioning body requires the use of stock rocker arms(rigid shaft mount radius tip)...it's understood that no matter how perfect the scrub pattern is set up, that due to the much higher life and thus wider scrub pattern with more side forces...the guides are going to wear out very quickly.
KCS is exactly right, if you understand the geometry involved in radius tip rockers you'll see that it's incredibly likely that those guides are going to wear incredibly fast. LS or not I've seen this dozens of other times in other motors utilizing radius tip rockers, one of which is a racing program of ours where the sanctioning body requires the use of stock rocker arms(rigid shaft mount radius tip)...it's understood that no matter how perfect the scrub pattern is set up, that due to the much higher life and thus wider scrub pattern with more side forces...the guides are going to wear out very quickly.
12-15-2015, 08:12 AM
#59
Listen, I'm sure you can find an issue with any motor ever built. Something can always be different or "better". I don't understand the geometry because I'm not interested in it on that level. If the guides wear out they will be replaced. This car runs one 1/4 mile at a time and 1k miles in 1/4 mile increments is years worth of racing for me. The build parts are quality from the oil pan to the intake. Whether they are stock rockers or bronze guides. It is what it is
As far as the rockers go, if you're not concerned about longevity, then I would think that they're a pretty good choice. With the valves probably being really heavy, the OEM rockers being as light as they are would help a great deal in keeping the valvetrain stable at the RPM you're turning.
12-15-2015, 12:35 PM
#60
On The Tree
Thread Starter
I think you have a pretty interesting build and I'm sure I'm not the only one that appreciates you sharing it.
As far as the rockers go, if you're not concerned about longevity, then I would think that they're a pretty good choice. With the valves probably being really heavy, the OEM rockers being as light as they are would help a great deal in keeping the valvetrain stable at the RPM you're turning.
As far as the rockers go, if you're not concerned about longevity, then I would think that they're a pretty good choice. With the valves probably being really heavy, the OEM rockers being as light as they are would help a great deal in keeping the valvetrain stable at the RPM you're turning.