Rocker, and rocker stud help
Thread Starter
Drifting
Joined: Oct 1999
Posts: 1,722
Likes: 0
From: Gloucester Va
Rocker, and rocker stud help
Ok as some know and others may not. Quick run down. I had a broken rocker stud, and am in the middle of trying to figure out what to do.
Most have said to upgrade to the 7/16, but I'm afraid this will cause problems with the valve cover fitting? I plan on using the comp cams pro mag. I have also read in LPE's book that roller rockers take longer studs. Or they will break. I had normal length studs. Could this be more or less the cause of my broken stud? Which means I would be OK to go with 3/8's stud again but longer for the roller rockers? I just want to do this right the first time. I am running the LPE 219 cam with lift @ .560.
Thanks for your help.
Most have said to upgrade to the 7/16, but I'm afraid this will cause problems with the valve cover fitting? I plan on using the comp cams pro mag. I have also read in LPE's book that roller rockers take longer studs. Or they will break. I had normal length studs. Could this be more or less the cause of my broken stud? Which means I would be OK to go with 3/8's stud again but longer for the roller rockers? I just want to do this right the first time. I am running the LPE 219 cam with lift @ .560.
Thanks for your help.
Burning Brakes
Joined: Sep 2000
Posts: 1,199
Likes: 1
From: NewCastle IN. USA
Re: Rocker, and rocker stud help (88_vette)
sorry to hear about your breakage.
I don't think that longer 3/8" studs will fix your problem, if it just stripped the threads off from the nut not being down far enough then it might.
But if your stud actually broke in half, then I would get the 7/16" studs for sure. of course that means new rockers and nuts in 7/16" sizes too.
RJ
I don't think that longer 3/8" studs will fix your problem, if it just stripped the threads off from the nut not being down far enough then it might.
But if your stud actually broke in half, then I would get the 7/16" studs for sure. of course that means new rockers and nuts in 7/16" sizes too.
RJ
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
Re: Rocker, and rocker stud help (88_vette)
I used std length 7/16" studs when installing my 1.6:1 ProMagnums. No problems from these fitting the stock valve covers. I did have to grind down the drip tabs and the sides of the bolt bosses to clear the ProMagnums though. Keep water on the job when grinding that Mg down.
BTW did you toss those oil shedders from atop your springs? I tossed mine and went to Ti retainers and 10deg locks. This new spring assembly felt substantially lighter than the stock setup.
BTW did you toss those oil shedders from atop your springs? I tossed mine and went to Ti retainers and 10deg locks. This new spring assembly felt substantially lighter than the stock setup.
Former Vendor
Joined: Jun 2001
Posts: 7,204
Likes: 6
From: St Marys PA
Re: Rocker, and rocker stud help (65Z01)
88_vette,
I think I replied to your post form before, but anyways, with that .560" lift cam (LPE219) you needed to have the Spring and Valve upgrade from AFR! If you didn't you only have springs that are rated for .550"! This may be and probably is the root of your problem. I would either check with AFR and see what you have and upgrade to 7/16. You won't have any problems with height. Clearance "between" the RR is an issue, but can be taken care of with a dremel tool. Do yourself a favor and check with AFR. Good luck and sorry to rain on your parade!
I think I replied to your post form before, but anyways, with that .560" lift cam (LPE219) you needed to have the Spring and Valve upgrade from AFR! If you didn't you only have springs that are rated for .550"! This may be and probably is the root of your problem. I would either check with AFR and see what you have and upgrade to 7/16. You won't have any problems with height. Clearance "between" the RR is an issue, but can be taken care of with a dremel tool. Do yourself a favor and check with AFR. Good luck and sorry to rain on your parade!
Thread Starter
Drifting
Joined: Oct 1999
Posts: 1,722
Likes: 0
From: Gloucester Va
Re: Rocker, and rocker stud help (ski_dwn_it)
Thanks guys. Good to hear the RR will fit with some mods. I've already cut the drips tabs, so half the work is done.
Ski_dwn_it
I called AFR sometime ago, when the fact my lift was .560, and they only rate there deal .550. The tech guy said that I'm fine at .560. That those springs could handle about .580. They just rate them a little under for insurance. I hope they are right.
Thanks again guys
Ski_dwn_it
I called AFR sometime ago, when the fact my lift was .560, and they only rate there deal .550. The tech guy said that I'm fine at .560. That those springs could handle about .580. They just rate them a little under for insurance. I hope they are right.
Thanks again guys
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Re: Rocker, and rocker stud help (88_vette)
Just a couple of cautions. You have established that the spring is good for your lift...but at what installed height? I would double check to be sure that you aren't running into "coil bind". The other item to check is the clearence between the retainer and the valve guide. Interference at either of these points will break a stud a lot quicker than just a stud that "could" be a little stronger. In fact a stronger stud may CAUSE greater damage next time, just because it won't "give up" as easily. These items hadn't been mentioned in this thread. Maybe they've been taken care of. I didn't think it would hurt to bring them up. I hope all is well.
Thread Starter
Drifting
Joined: Oct 1999
Posts: 1,722
Likes: 0
From: Gloucester Va
Re: Rocker, and rocker stud help (CFI-EFI)
No it does not hurt to bring it up. I have not checked these items mainly because these heads were suppose to be made to take my setup so I never checked it out. I'm finding out that a number of things we talked about were not taken care of.
I'll be checking thing out soon. I have not ordered the RR or studs yet until I know for sure what's going on else where.
Thanks again guys
I'll be checking thing out soon. I have not ordered the RR or studs yet until I know for sure what's going on else where.
Thanks again guys
Former Vendor
Joined: Jun 2001
Posts: 7,204
Likes: 6
From: St Marys PA
Re: Rocker, and rocker stud help (88_vette)
88_vette,
Hey there guy. I spoke with Mike at AFR and he said they rate there springs at the ragged edge. In other words if they say they are good till .550" they are ONLY good till .550". He said that they are for racing applications and guys want to know what the EXACT rating is for. He also cautioned me about being right at the cutoff point. That is why I went with the valve/spring upgrade. Now I have a bit of cushon. I would strongly recommend that you either stay with 1.5 RR or have the upgrade done. Since the heads are on your car and you would have to take them off and probably have them sent back to AFR to be set for the correct springs, I would probably elect to just stay with the 1.5RR. Thats a decision you will have to make. Sorry man, I almost made the same mistake. I caught it just in time and NO ONE at AFR warned me about this. I had to ask to find out the above. I can't say that they should have known, its up to the caller ask the right questions. Nevertheless, I will follow the progress of this and wish you luck. I can't even say that your performance would be affected with the 1.5RR. It all depends on what you are shooting for. Hell, put a 50 hp Nitrous kit on it and make up the difference and then some! Good Luck.
-jesse
Hey there guy. I spoke with Mike at AFR and he said they rate there springs at the ragged edge. In other words if they say they are good till .550" they are ONLY good till .550". He said that they are for racing applications and guys want to know what the EXACT rating is for. He also cautioned me about being right at the cutoff point. That is why I went with the valve/spring upgrade. Now I have a bit of cushon. I would strongly recommend that you either stay with 1.5 RR or have the upgrade done. Since the heads are on your car and you would have to take them off and probably have them sent back to AFR to be set for the correct springs, I would probably elect to just stay with the 1.5RR. Thats a decision you will have to make. Sorry man, I almost made the same mistake. I caught it just in time and NO ONE at AFR warned me about this. I had to ask to find out the above. I can't say that they should have known, its up to the caller ask the right questions. Nevertheless, I will follow the progress of this and wish you luck. I can't even say that your performance would be affected with the 1.5RR. It all depends on what you are shooting for. Hell, put a 50 hp Nitrous kit on it and make up the difference and then some! Good Luck.
-jesse
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Thread Starter
Drifting
Joined: Oct 1999
Posts: 1,722
Likes: 0
From: Gloucester Va
Re: Rocker, and rocker stud help (ski_dwn_it)
Thanks SKi_dwn_it
:cry Though it's conflicting info with what I got, I think you are right on the money. I'll go with 1.52 RR (I think that's what Comp cams has? Have to double check) which would put me at .530 lift or close to it. SO, I loss 1/32 of lift. Not a great deal really. Which is about as far as I can go safe I think? Hell I'd rather have a car that ran well, and safe then not at all. I don't think .035 will make a over whelming difference? Maybe a few HP. In fact I know A guy with a hot cam putting out a good 360HP at the wheel in a LT-1. Plus I want to supercharge later which means new heads @ min to lower the compression. I'll keep you guys up todate.
:cry Though it's conflicting info with what I got, I think you are right on the money. I'll go with 1.52 RR (I think that's what Comp cams has? Have to double check) which would put me at .530 lift or close to it. SO, I loss 1/32 of lift. Not a great deal really. Which is about as far as I can go safe I think? Hell I'd rather have a car that ran well, and safe then not at all. I don't think .035 will make a over whelming difference? Maybe a few HP. In fact I know A guy with a hot cam putting out a good 360HP at the wheel in a LT-1. Plus I want to supercharge later which means new heads @ min to lower the compression. I'll keep you guys up todate.
Former Vendor
Joined: Jun 2001
Posts: 7,204
Likes: 6
From: St Marys PA
Re: Rocker, and rocker stud help (CFI-EFI)
88_vette,
Sorry to be the one to break the news to you. :( But I am reluctantly glad to hear that you decided to stay with 1.52RR. I really don't think you will even *feel* the difference. Plus as you said, you would rather have a reliable and good functioning car. I agree 100%. As for the 7/16 studs. Its only going to cost ~35 bucks to upgrade, and the cost of 3/8 or 7/16 RR are the same so I have to ask why wouldn't you? For the extra insurance you will buy much more than 35 bucks. To me its a no brainer. I'm glad I could help out and let us know when your back up and running! Good Luck. :cheers:
Sorry to be the one to break the news to you. :( But I am reluctantly glad to hear that you decided to stay with 1.52RR. I really don't think you will even *feel* the difference. Plus as you said, you would rather have a reliable and good functioning car. I agree 100%. As for the 7/16 studs. Its only going to cost ~35 bucks to upgrade, and the cost of 3/8 or 7/16 RR are the same so I have to ask why wouldn't you? For the extra insurance you will buy much more than 35 bucks. To me its a no brainer. I'm glad I could help out and let us know when your back up and running! Good Luck. :cheers:
Thread Starter
Drifting
Joined: Oct 1999
Posts: 1,722
Likes: 0
From: Gloucester Va
Re: Rocker, and rocker stud help (ski_dwn_it)
Thanks to all that have helps. I'm just glad I was able to hold off on buy RR. I tend to want these things now.
Yeah I knew the 7/16 studs and what not didn't cost more, just not real up on all this stuff (as you can tell), and didn't know if there would be a reason not at this point. I would rather have the stronger ones.
Thanks again guys.
Yeah I knew the 7/16 studs and what not didn't cost more, just not real up on all this stuff (as you can tell), and didn't know if there would be a reason not at this point. I would rather have the stronger ones.
Thanks again guys.
