Ok I have a set of AFR 195's (not the new ones) they have the studs they came with 3/8. I was on AFR's web sight about a month ago they had a note on using the 3/8 Comp Pro Mags on the AFR 195's say the studs needed to be longer. Well damn if those arent the rockers I have.

I have seen some threads with other guys runing this same setup i was wanting to know if they used the longer studs. If I place the rocker on the head at the corect geometry it looks to be fine but I know this is half A$ and will only be able to tell for sure during true mock up with the cam in.

Anyone using this combo I would like to here your story before I call AFR.
(Only 50$ I just want to know ):bowtie:
Matt

I just bought a set of the AFR Eliminator heads & had to change the studs to 7/16" ones to match my rockers. Let me know how long your current studs are & if the ones I took out will work, you can have them for the shipping cost.
They are just going to sit in a corner of my tool box otherwise.

I've never encountered this with AFR in the past... and have used the pro-mag rockers lots of times.
I know AFR just did a major rework on the 210cc heads, I wonder if they made some changes to the 195's too

Its not just with AFR heads, that applies to ALL small block heads with those rockers - I found out from experience why. What happens is that with the larger trunion on the ProMag rockers, the poly-lock sits about 1/8-1/4" higher up on the rocker stud. You'll notice this when you try to tighten up the set screw, and it seems to go down into the poly-lock alot farther than it should (the top of the set screw should be roughly at the top of the poly-lock). Because of this, the poly-lock can only grab onto a few threads on the stud, and with any kind of performance cam/spring, one or more of the rockers will eventually snap off the top of the rocker stud, probably right below the bottom of the poly-lock, like what happened to mine. I had this happen to me last summer, about a month after I put an XE274 and matching valve springs into my car - and yes the heads were machined to handle the lift, nothing was binding here. They are factory #601 head castings, but were machined to handle .550 lift, and machined for screw-in studs and guidplates.

The cure is the 1/8" longer screw-in studs that ARP makes. I can't remember the part number off hand, but I bought that set of rocker studs from ARP and installed them, and haven't had any problems since.

Thanks for the reply's guys. Gregh my studs messure roughly overall 2.400 give or take a couple thousands. They were standerd equip nearly 2 years ago when I bought them.

With the 195 eliminators you do need the longer studs for the pro magnum rockers. Not sure about the older design

Boxcar,
I have those same heads and the ProMag rockers. I wasn't aware that AFR recommended longer studs with those rockers. I didn't set the lash on my valves because I dynoed my engine immediately after I assembled it so my dyno guy did it for me. So far I haven't had a problem but this a good reason to check them before I take it out this year.

I just remembered to measure my studs today. They are 2.585" over all & 1.885" from the top of the stud to the bottom of the hex head.

The longest ones that I saw(in 3/8) on summit that ARP sold were 1.895 usable lenth as they say. Mine are 1.725ish usable. So thats close to an 1/8 longer I will email AFR and ask them what the recomended lenth is and go from there. Gregh If you have what I need that would be awsome. And that would be a really standup thing to do for someone you dont know.

79 RallySport,
If you dont mind me asking how did your engine dyno with these heads? What combo? If you told me before Im sorry for asking I know a few guys made coments in the past.:bowtie:

box,
no problem. I responded to one of your older posts about how much power to expect or something along those lines. Click here: http://www.nastyz28.com/forum/showthread.php?t=58769

I wonder if this issue applies to the edelbrock performer heads?

I wonder if this issue applies to the edelbrock performer heads?

See my post above. ;)

79Rallysport
Hey man I remember you posting now I thought you did. I checked your home page and you have real close to the same setup. I even have a 010 block that looks just like yours. Short block is Identical except my cam is a bit biger so im gonna ask a few questions,How was your Piston to valve clearence? How was clearencing the block? I saw you used a small base cam,rev kit ect...

Matt

Gregh I would like to get those stud's. I just need to know how to go about doing it. I havent ever had to pay shiping on anything from a individual.


Matt

Send me your address & zip code in a PM & I'll check the shipping cost. It shouldn't be very expensive using the mail service. I might even be able to send them in an padded envelope & go airmail.

Paypal is the easiest for payment, Money orders across the border are a bit of a pain.

I wonder if this issue applies to the edelbrock performer heads?

I wasn't aware of this stud issue until I ordered my AFR's. I found that info on their website. When I removed my e-tech's from my engine I noticed that the nut was not really engaging the studs by that much. I never noticed that when I installed the e -techs with the pro-magnums. I would check if I was you. It might be an issue with every head using the pro-magnum rockers.


Jerry

I measured the ones one my rpm heads. From the bottom of the hex head to the tip of the stud is 1.85. So if I went with the AFRS' I would have another .045. Now when I was trying to figure out what pushrods I needed I noticed it did not take many truns for the rocker to tighten up on the stud. Also on the pic below the lock does go down quite alot. What do you think?

http://img341.imageshack.us/img341/6200/intakeclose1jpgwi6.jpg

Have you run these head's like this or not?

Where are you from in Va rust?

Matt

No, I'm still need to find out my pushrod length. I ordered the arp 1.895 studs. I figured they would be better and its cheap insurance for piece of mind. I will let you know how it turns out on my 383 pre-assembly thread. :shy:

Yeah man let me know Im not far behind. I have most everything just waiting on the last chunck of dough for the machine shop. I work outside so the weather has slowed me up a bit.

Matt

O yeah you never did say where in Va you where?

Matt,

I'm in Pulaski, VA. Its a small town about 30 min southwest from Blacksburg. I'm off exit 94 on I-81. Stop by if you ever get down this way. :bowtie:

Yeah man I know where you are same gos if your ever around Richmond. If you ever need a 4 bolt main 350 I will cut you a good deal I have been on a pulling spree latley.

Matt