Got a Cam with .550+ Lift and stock rockers, You've got problems
04-24-2009, 09:14 PM
#61
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I would have to agree based on the pictures. I am going to be pulling mine shortly to upgrade the valvesprings. I plan to check and take a picture of them at full lift.
Also I plan to weight both the aluminum & stainless steel rockers we have. A friend scrapped his shaft mounted ones due to valve float at 6200 RPM with them because they were to heavy.
Also I plan to weight both the aluminum & stainless steel rockers we have. A friend scrapped his shaft mounted ones due to valve float at 6200 RPM with them because they were to heavy.
04-24-2009, 09:46 PM
#62
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I am running afr 8019 springs on my 205's with a lsl lobed 241/253 .624/.624 with stock rockers for at least 10 k miles with no problems.
I spin this thing to 73-7400 all the time.
most on this site just seem to look to spend cash to turn 6300 rpm's
makes me l.o.l damn
fyi the stock **** is good for 6300 for 150k mile's
crazy this site is.
i would buy the most expensive **** you can buy just to be safe. thats not how i feel but that is what most would post. most peaple post too much and don't read enough on this site
I spin this thing to 73-7400 all the time.
most on this site just seem to look to spend cash to turn 6300 rpm's
makes me l.o.l damn
fyi the stock **** is good for 6300 for 150k mile's
crazy this site is.
i would buy the most expensive **** you can buy just to be safe. thats not how i feel but that is what most would post. most peaple post too much and don't read enough on this site
04-28-2009, 02:40 AM
#65
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Here are some pictures of the 2 randomly selected rockers that came out of my LS1 after running an LGX3 and an X4 for a combined milage of about 15K miles. Both of these cams are over 600 lift and as you can see it is clear the section of the rocker pad that made contact with the valve tip. I would be real curious to see the same pictures done for a stock cam to see if the wear area is similar. As for my uneducated eye it looks like the wear area does not come that close to the tip but I could be overlooking something. Anybody feel free to comment on this.
04-28-2009, 06:27 AM
#66
I personally think the take-away from the article is to make sure your geometry is correct, irregardless of what rocker is installed. This is something most don't even consider or verify when assembling the valve train. Most just "bolt it together". Wear problems can occur with any improperly set up rocker.
05-12-2009, 01:48 PM
#70
"I personally think the take-away from the article is to make sure your geometry is correct, irregardless of what rocker is installed. This is something most don't even consider or verify when assembling"
X2 on that. It appears with the proper pushrod length they would not have had that problem.
X2 on that. It appears with the proper pushrod length they would not have had that problem.
05-13-2009, 04:04 PM
#72
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FWIW, the rocker angle is only 3.5° more going from .550 to .650 lift at the valve. 3.5 degrees of rocker angle doesn't mean dick ****.
05-13-2009, 06:29 PM
#73
The problem is they show a "picture" of a rocker arm jamming on the tip of the valve tip. IHMO for lift they are using the pushrod is to long using their picture as the example. A shorter pushrod would back the rocker arm off the tip of the valve stem. This would correct the situation and of course the geometry would need to be checked to get the correct length pushrod.
Now there have been pictures posted above that show the correct wear pattern on the factory rocker arm when the correct geometry had been used. These are within the lift criteria of the story. So IMHO the story was just trying to sell an aftermarket lifter and no doubt one of their advertisers.
Now there have been pictures posted above that show the correct wear pattern on the factory rocker arm when the correct geometry had been used. These are within the lift criteria of the story. So IMHO the story was just trying to sell an aftermarket lifter and no doubt one of their advertisers.
Last edited by 1989GTA; 05-13-2009 at 07:38 PM.
05-15-2009, 03:03 AM
#76
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So who needs to run roller rocker? My stocker has 104 miles on them. I don't feel like putting them back with my new head and cam. How much it cost for a rebuild?
05-15-2009, 01:36 PM
#79
It's funny how they generated an image of the rocker arm contact to the valve tip to prove demonstrate their theory, when it would have been obvious to take actual pictures of different lifts that their theory was just trying to sell snake oil.