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  #61 (permalink)  
Old 03-14-2019, 05:05 PM
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Originally Posted by Dfish1247 View Post
If I had the rocker way up the stud it was close to going off the exhaust side, but bottomed out, it was trying to fall off the intake side.

Talked with Mr. Straub and he gave a big explanation of what was going on, said brodix put a taller intake valve in than factory, and the pitfalls of not setting this up right. IE, ruining the valve guides for one example. It's put the brakes on for now as I have to work over the weekend, so I"ll get back on it Monday.
That's where I was headed, the +.100" longer valves Brodix puts in these heads and the rockers Straub has made to his spec to fix the problem, with the shorter length between center pivot and roller tip and the shorter distance between the pivot and the pushrod cup to keep the ratio what it should be.

Crower and Comp Cams also sell a "backset" rocker for this same situation.

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  #62 (permalink)  
Old 03-14-2019, 07:44 PM
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Welcome to the world of "bolts right up", can't remember where I read that, but if it ain't the truth. I'll call him tomorrow and if not outrageous, just take the engine up there and get them to measure and get me the right parts. 16mpg from the truck and a 30 minute drive each way who knows how many times will negate any savings doing it myself.


But, this is my first big block, so gotta learn somehow.
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Old 03-21-2019, 10:09 AM
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My dad went to straub for me and got the rockers as I had to work. I think he's more excited than me to see it run,hehe.

Anyway, got them measured and ordered, hopefully be here next week sometime and I'll get to close the top end up. Measured 3 times and got 7.6185" intake and 8.4100" exhaust all 3 times.
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Old 03-31-2019, 02:26 PM
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Guys, pushrods and rocker arms are in. But, I stumbled on lunati's instructions for pre load and they say 1/4 turn, my pushrods are .050" longer than measured for pre load, so I done 1 full turn after I couldn't rattle the pushrods up and down. Which one is right, baring the engine over I can't feel any binding anywhere currently, and I have not primed the engine yet either.
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Old 03-31-2019, 07:05 PM
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One full turn is more than .050" preload at the lifter plunger.....sure, it is .050" down at the 7/16"-20 stud, but the pushrod cup end of the rocker is going to move farther than that, as the fixed end it pivots on in this case is the valve tip...the roller rocker trunnion goes down the stud .050" and the pushrod cup end goes down somewhere close to .080".

Lunati's 1/4 turn is for typical performance use, to avoid having much clearance for the lifter to pump up if valve float occurs.. sets the actual plunger only about .020" down from the snap ring.

Somewhere about 2/3 to 3/4 turn will get you close to .050" plunger travel....you can check by rigging a dial indicator over the pushrod cup end of the rocker and get an exact turn amount to use if you want to.
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Old 03-31-2019, 10:23 PM
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Good thing I didn't put loctite on the poly lock set screws,lol.

Thank you for the explanation, gotta work in the morning so I'll get them straightened out Thursday when I get home.

Can I just back the poly lock off 1/3 of a turn and be ok, or should I start from scratch? I don't mind starting all over, but if I don't need to, I won't.
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Old 03-31-2019, 11:15 PM
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Either way will work, as this isn't a solid lifter....the plunger can be off a few thousandths and it doesn't matter.
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Old 04-11-2019, 06:19 PM
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Finally got my lazy butt up and backed the poly locks off a 1/3 turn. If a couple grand would mysteriously appear, I could order a transmission and toque converter, and get this show moving. That is the last major expense I have to get the engine in the car. Once the trans does arrive, I'll put the 455/th400 combo up for sale and for a couple weeks the car can be driven to show it works, that should be the finishing money there.

Speaking of leftover items to pick up, I'm going to get the robmc sending unit with 1/2" pickup for the gas tank, for fuel line up to the front, would that ni-copp line be good to use?

I'm running hardline as much as I can with rubber line at fuel pump inlet and sending unit outlet.
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Old 04-11-2019, 06:29 PM
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NiCopp will work great for that. Forms easily to match the factory route if you want it to.
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Old 04-11-2019, 07:23 PM
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Sweet, laying on the ground and bending stainless is terrible.

For where I hook the rubber hoses to the hard line, will a flare and 2 hose clamps be sufficient or should I pony up for threaded connections, I know the first idea sounds Leroy engineered, but it works on my truck, so I wouldn’t see why not here.
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Old 04-11-2019, 08:34 PM
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The factory just uses a little bead formed into the end of the line to help prevent pull-off, you can come close to that at home by doing the first half of a double flare, then only partially finishing it by not fully pressing the second flare step fully down, just press it 20% or so.

No problem with the way you want to do it.
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Old 04-17-2019, 11:52 AM
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Fiddled around a little last night putting in the fuel pump pushrod. My question is, shouldn't the pushrod fall out of the hole easily? It fits like a glove, just the hole is dirty and it hangs up.

What I done was oil the rod and slide it in, it stuck and had to remove it with needle nose pliers, I don't mean locked up stuck, just held up, it slid out easily. Can a 20ga gun barrel brush and pb blaster be used to clean the hole?
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Old 04-17-2019, 01:50 PM
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Hopefully the last time I have to see the lifters. Intake is going on now.

Oh, 20ga shotgun brush, pb blaster, and barrel cloths got the push rod moving freely and falling easily.
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  #74 (permalink)  
Old 04-17-2019, 05:50 PM
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Quote:
Originally Posted by Dfish1247 View Post
Fiddled around a little last night putting in the fuel pump pushrod. My question is, shouldn't the pushrod fall out of the hole easily? It fits like a glove, just the hole is dirty and it hangs up.

What I done was oil the rod and slide it in, it stuck and had to remove it with needle nose pliers, I don't mean locked up stuck, just held up, it slid out easily. Can a 20ga gun barrel brush and pb blaster be used to clean the hole?

Yes you can clean it like that. Mine always gave me trouble falling out, even with grease. Now it's gone, had to go electric.
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Old 04-17-2019, 05:55 PM
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What kind of covers are you using? Just curious if there are any other rollers that fit under stock covers. I did suspect then someone confirmed that the comp super magnum or something steel ones with short polylocks fit stock covers with 2 gaskets.
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