you can get offset rockers.

AFR can tell you if they are mandatory or if you can clearance the head to get them to fit.

Do you have the Isky adjustable guideplates?

 

I have the 195 street heads. the only offset rockers that i know about are the jessel shaft rockers.(very expensive) I had an engine shop work on them to clearance my push rods and they created a hole in the intake that had to be patched. I would prefer another method even if it means going with a new mechanical roller cam so that i can use offset lifters. I only have the audjustable AFR guide plates that came with the AFR heads. Does anybody know where i can find a push rod gauge sleeve to check the clearance between push rod and head?

 

Which AFR head, they are not all the same?

Bogie

 

What you're working on would be a little helpful and how much is it hitting. If it's in the ballpark, clearance the head if you're not upsetting the geometry of the rocker over the valve.

 

Did you contact AFR before making modifications to these heads? If so what did they say?

For a more or less standard head where they weren’t moving the valve center for a larger diameter this is not a common problem on the 195 head.

Bogie

 

It is perfectly okay if the cylinder head material contacts the pushrod, as long as it is just a brush touch against it....it acts lke a soft finger placed on a vibrating guitar string to silence it....which means is it acts as a damper for harmonic vibration on the pushrods.
What you don't want is a contact hard enough to flex the pushrod or try to force it out of the pushrod cup on the rocker.
If it is just a light graze you can barely tell, it will be fine.

As far as offset pushrod cup rockers, several companies make stud mounted rockers lke this....Harland Sharp .050" cup offset(you'll find them listed on AFR's web site), Scorpion (.150" cup offset), Crower Cams (.150" offset).

Nobody makes a hydraulic roller lifter with an offset cup because there is no way to prevent the plunger and cup from rotating inside the hydrailic section of the lifter, creating a clearance and alignment disaster.

You can also run solid roller lifters on a hydraulic roller cam, just have to be tight lashed really close at around .006"-.008" cold lash.....there was just an EngineMasters/MotorTrend/Roadkill episode about this a while back(you can find it on YouTube i think also), marine enndurance guys have been doing it for years.

 

So now we go from hitting the guide holes in the head to already having them worked on by a machine shop. On those types of heads, there is normally more than enough room to move the guideplates around to provide the hole clearance needed. You didn't say what you were running for pushrods either. If moving the guideplates isn't quite enough, the guideplates can be modified for clearance. As far as the machine shop getting into the intake port - well, you picked the wrong machine shop. As the saying goes, none of this is rocket science but it does take patience to get it right. I see way too many people just throw parts at something without taking the time to make them work together.

 

you will need 4 rights and 4 lefts, if I understand their numbering.

1.65 SBC Race Series Rocker Arm Right Offset – Scorpion Racing Products

scorpionracingproducts.com

these make life easier with aftermarket heads.

Isky Racing Cams 200AGP Isky Adjustable Guideplates | Summit Racing

Free Shipping - Isky Adjustable Guideplates with qualifying orders of $99. Shop Guideplates at Summit Racing.

www.summitracing.com

 

195's ahould not need any offset rockers or lifters...something isnt right. Use adjustable guide plates, mark them after alignment and tig weld solid, or some do it actually on the head after rocker studs tightened

Sent from my SM-G960U using Tapatalk

 

You could actually cut the current guideplates in half, hog out the mounting hole a bit and massage the "U" that guides the pushrod. Once you have it then you could weld the halves back together.

 

I bought assembled Profiler 210 heads, and the Erson guideplates wouldn't allow the rocker tips to align centered with the valve tip.
I bought AFR adjustable guideplates, and I'd recommend that everyone use adjustable guideplates.
It allows you to get proper alignment, even though the ones near the intake ports may not be "perfect", but with adjustable plates those won't affect the others.

Also keep in mind that once adjusted, the gaps between my guideplate halves vary.
So if you decide to weld them, as suggested above, you'd want to mark the cylinder number on them.

Oh yeah, these guideplates were only $33.99...

Airflow Research (AFR) 6103 AFR Racing Pushrod Guideplates | Summit Racing

Free Shipping - AFR Racing Pushrod Guideplates with qualifying orders of $99. Shop Guideplates at Summit Racing.

www.summitracing.com

 

I have AFR guide plates they work fine the problem i have is to adjust two of my rockers where they are centered on the valve they will rub the rod hole and bend my push rods .

 

As long as the roller contacts the full width of the valve stem, it's just as good as offset rockers. Think about it! The offset rockers still operate with a side load from the offset pushrod cup.

I bought a 1.5/1.6 set of 1043 Scorpions that had the 4R and 4L 0.150 offset rockers to try and correct alignment on a couple that had interference on my AFR 195's, but never installed when I realized I was gaining nothing and would have to redo all my guide plates. Still have them sitting in their box on a shelf.
https://scorpionracingproducts.com/wp-content/New SRP Catalog.pdf

On p. 5 Scorpion has sets Specifically for AFR 180-220 heads. 0.100 offset. They weren't available when I bought mine. But I really don't see the point on AFR 195s anyways.

 

Then you just need to see if you can clearance them... as someone mentioned.
That's what I did to mine, but still needed the adj plates as well.
As long as you have enough thickness... I didn't have to remove that much material really.

 

Technically speaking, Offset rockers keep the pushrods inline with the lifter motion and transfer the motion laterally.
Running standard rockers slightly angled/slighty pigeon toed in or out intruduces a slight geometrical error when the pushrods are then NOT inline with the lifter motion. It's so slight that it's well within the already less than perfect design of the stud mounted rocker and espeically for street performance use a non issue as the rocker and studs themselves have enough flex that it changes things more than the toe in or out of the rocker. This is a common thing in performance heads to gain room for bigger valves and ports. It's just all part of the comprimises of packaging a 23 degree head and being able to use the standard 23 degree stuff.