T/D 7020 rocker set up? Who has a set they want to part with?

[BattlestarGalactic]

Sure, thanks.  It would be great for others to see how it all goes together anyway.

I've seen other heads at the shop get this style rocker, with the mounting plate, but never an FE.

[Jb427]

I have been Busy BattlestarGalactic here is the pic

[CaptCobrajet]

 JB, hopefully you have shim washers for the head bolt bosses.  They need to be exactly the right thickness to flush out with your milling, or you should spot face to get there.  We make some special shim washers for that purpose that we use.  I like for the subplate to sit right on the milled area when torqued.  My washers are 1.020 x .502 x .142 thick, and we spot face .140.  They will embed about .002 when torqued.  Most manufacturers' bolt bosses are not machined right-on, although BBM's are the most consistent.  Edelbrocks especially need a tune up of the bosses.  Just a little info that might save you some pain.........Deck surface to subplate on an unmilled BBM head needs to be 3.560 with my valve length and prep, bolt bosses 3.420 using my shims. That may be different with other valves and prep, but it shouldn't be much different.

[Jb427]

Cheers for that info

[cjshaker]

So how does the oil get over to the stand? That machined slot comes up a fair bit short, or is it just far enough to reach the stand hole? It doesn't seem like it would be. I realize this has no bearing on a pushrod oiling system, but on shaft oiling....

[blykins]

There is no shaft (or stands) as you would traditionally think of one.  There's just a little short shaft that each rocker rides on. 

Each rocker arm gets its own oil from the pushrod, which oils the fulcrum.

[cjshaker]

There is no shaft (or stands) as you would traditionally think of one.  There's just a little short shaft that each rocker rides on. 

Each rocker arm gets its own oil from the pushrod, which oils the fulcrum.

Yes, on the paired shaft system, but what about the Street system? Or using factory stuff? The drilled angle seems to come up short from connecting to the stand bolt, where oil is transferred up. And the stands need to be milled down a bunch on TFS heads, so that removes most of the "slot" that is present in factory stands, making it worse.

[blykins]

You only mill the head down when you're using the T&D paired rockers.  The head that JB427 is showing has been cut way down for the sub-bar for the T&D paired rockers.  The traditional oil hole in the head doesn't function anymore.

[cjshaker]

Got it. I was assuming that was factory machined height.

[BattlestarGalactic]

I have been Busy BattlestarGalactic here is the pic

Thanks.  I think this will help others that are contemplating this change.   If you do run a shaft rocker, you have to remove the heads to convert over to this set up.

[BattlestarGalactic]

Well, ordered on May 4th, delivered on May 14th.  Not bad.   

Best guess....they were returns from someone else and that is why they were done so quick.  Not complaining though.   

[blykins]

Doing a set of TFS heads right now with the paired rocker setup.  The TFS heads will make a lot more chips, for sure, as the stands are raised much higher than the other heads.







Trying to remember off the top of my head, but I think these were cut to within about .118" of the bolt bosses.  I have some .120" hardened washers to go under the sub-bar. 

With the TFS length valve, I didn't need to shim or cut anymore.  Got a nice little .050" pattern on the stem. 

[62Fordguy]

Would like to know how the rockers are offset? Can I buy a standard 7020 set, and then use washers to make the offset, or does the offset have to be fabricated in the rocker? Looks like lock rings on the sides of the rocker, so washers might not be possible. Also can a needle bearing rocker be easily switched to bushings?

[blykins]

Would like to know how the rockers are offset? Can I buy a standard 7020 set, and then use washers to make the offset, or does the offset have to be fabricated in the rocker? Looks like lock rings on the sides of the rocker, so washers might not be possible. Also can a needle bearing rocker be easily switched to bushings?

The offset is built into the rocker arm.  Not able to do it with washers.