360 LA installing Promaxx Aluminum heads

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Rockers installed.. all looking good. Decided to go with the stock stamped set even though I have a brand new set of Harland Sharp 1.6 ratio rollers sitting on the bench. Time constraints, can't afford to wait for the custom push rods to be made. Would likely add 10 business days to project.

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Anyway.. topic comes up a lot... shafts sit perfect in seat.

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They do look shallow but there are also many pics of the rocker stands cut with an incorrect radius. Mostly speedmaster heads.
 
I would have thought you would need custom pushrods more using the stock non adjustable rockers, since they are adjustable and can make up some of the difference.
 
Have some downtime today waiting for a drill bit to arrive, need to resize the hole in the new intake to 3/8 NPT for the temp sensor.

Unboxed the Harland Sharp roller rockers and shafts.. figured I'd get a head start on getting them together. Cleaned first rocker and shaft ID and OD and tried to fit with light coat of assembly oil... rocker barely goes onto shaft. It's tight... like REALLY tight. Left it on the end of the shaft and I was barely able to get it to move. Took it off and inspected. Looks ok.. no galling in the aluminum. Is it common to have to touch up brand new rockers?
 
Here is the reply from HS:

We supply the rockers to Mancini and they get the shafts from another source. We have run into discrepancies with this before when making these rockers. The simple solution is to run the rockers on a hone to open up the holes slightly until they slide freely on the shafts. The second option would be to grind the shafts to a small OD, however it would likely be more difficult to find somebody who could do that. If either of those 2 don’t work you could send me the shafts and rockers and I can hone them here for you. I’d have to charge you $30 plus the cost of shipping to get this done for you. If that’s what you want to do you can send the parts to the address listed below in this email. Make sure you include a note.

At least I'm not going crazy.
 
If you bought those new, that’s absolute bullshit that they want you to pay anything to make them right.
 
If you bought those new, that’s absolute bullshit that they want you to pay anything to make them right.

I purchased the kit through Mancini and have not taken this up with them yet as they say HS covers the warranty. I've had the kit over a year and just opened up, kinda my bad for not checking. Ya know the drill.. life got in the way... lol. Anyway I just measured and the shaft is .8745, ID of the rocker is .874 even. Not too keen on shipping these off. Thinking a light touch with something like this: Brake Cylinder Hone, Adjustable Honing Tension, 0.750 in. - 2.500 in. Diameter, Each would to the trick fairly quickly. I can pick one up will call today... I like that aspect.
 
I know it’d be easily fixed but it’s the principle of it. $800 for a set of rockers should mean they are absolutely perfect. I’d be more understanding if they were $200 Chevy rockers.
 
I know it’d be easily fixed but it’s the principle of it. $800 for a set of rockers should mean they are absolutely perfect. I’d be more understanding if they were $200 Chevy rockers.

Normally I'd be right there with you.

But I did sit on these for over a year and the shafts are not HS parts. I'll give HS support a hat tip for replying promptly and offering a solution for a problem not of their making.

I'm just gonna hittem with a hone and wd40... time lost is my bad for not checking fitment when they arrived.
 
I was until I realized they didn't supply the shafts.
It depends on what the specs are and if his numbers are correct and accurate. The hole in the rocker comes in at .874. I would have expected that the target dimension would be .875", who would pick .874? That would be the first question I would ask HS, what should the hole in the rocker be and if it isn't where it should be, they should fix or replace for free. If the hole is anodized, they may have gotten it too thick or it may not have been big enough to begin with. A couple tenth's per side add up to too tight.
 
It depends on what the specs are and if his numbers are correct and accurate. The hole in the rocker comes in at .874. I would have expected that the target dimension would be .875", who would pick .874? That would be the first question I would ask HS, what should the hole in the rocker be and if it isn't where it should be, they should fix or replace for free. If the hole is anodized, they may have gotten it too thick or it may not have been big enough to begin with. A couple tenth's per side add up to too tight.



Harland Sharp has a vendor that does their anodizing work. And although I use rockers with bearing I don’t thing they anodize the inside.
 
After honing an embarrassingly small amount off each rocker and spacer ID, then deburring the shaft holes and ends... I was able to get both sides assembled. The salt... they shorted me one thin spacer. :rolleyes: That'll cost me gas to Summit and $15 tomorra.

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Gettin there... grabbed the shim I needed at Summit today. Did a driver and passenger side mockup. Driver side rockers are tight on on #3, I'll likely need some thinner shims or massage the ones I have. Passenger side is dead nuts on w/o issues.

Position on the valve tip.. spring clearance and saddle position all look good. Took push rod measurement on both sides

Driver 7.232
Pass 7.279

Planning to order some 5/16 rods right in the middle at 7.250. Is Smith Brothers the outfit most here use?

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