427 with 4.280 pistons?

[machoneman]

Yeah, those SS rocker pics show interference failure, not casting or machining failure. Something's not right with the valve train set-up.

[turbohunter]

I think you can break anything if you try hard enough.

[Barry_R]

A casting with inadequate cross section around the bushing.  Just too close to the "edge" on design - any flaw or issue with get a failure.

[turbohunter]

Not arguing, just discussing. I’ll never know as much as you’ve forgotten. I agree the round the shaft section looks small. But it is steel not aluminum.
My set up runs very well but it’s a low rpm, moderate spring pressure truck that doesn’t see much over 5k rpm (except maybe on a couple hillclimbs ). And my valve train geometry is good.
We really don’t know anything about what happened to the rockers in the pix. I assume rpms and spring pressure did them in. If that is the case then I wouldn’t have chosen those rockers for that app.

[NIsaacs]

Starting to look like an FE again. I think those rockers are Speedmaster. Are they any good? Crane solid roller can, no clue on the lifters.

Think those rockers are PRW. They’re stainless. I’ve been running a set in my truck for years on a hydraulic roller with no problems.

Thanks for the response, I didn't have a clue so I looked them up and found these, they look the same as the PRW.

https://r.search.yahoo.com/cbclk2/dWU9NTIwNkIxMUQ2RUJDNDg3NiZ1dD0xNTQ2MzM2MDU3OTYxJnVvPUlHU3lFUGxpMzV4R3UxNk9SalptYWk5eUF1Jmx0PTImZXM9eE0wOEIzQUdQU19SJmplPTQ1ZTZlZWUyLTBkYWEtMTFlOS1hNThmLTAwOGNmYTViNTY1Yy0yYWVjYjc3Yjc3MDAmdWk9NTAuMzguMjE0LjE2NCZqdD0xNTQ2MzM2MDU3OTg3JnBwPWUy/RV=2/RE=1546364858/RO=10/RU=https%3a%2f%2fwww.bing.com%2faclick%3fld%3dd3TjW_yQpa3fdau0XAIMTJAzVUCUwJq5dsaYWtyN8epDg9dLS93z0xvrV7MwcaIe58lzHksvGBQvmgeXgUduAz3eDEj_NtJj6xuhhWF2V5f6gaurJe6lR1o7WwoYkbDqaQcPVCBNpKevaNhcLLaZJyg9vOGAYvj5fS4hkGmmWZGwWXoGle%26u%3dhttps%253a%252f%252fwww.jegs.com%252fi%252fSpeedmaster%252f746%252fPCE261.1173%252f10002%252f-1%253fCAWELAID%253d230006180038154520%2526CATARGETID%253d230006180038440114%2526CADEVICE%253dc%2526https%25253A%25252F%25252Fwww.jegs.com%25252Fi%25252FSpeedmaster%25252F746%25252FPCE261.1173%25252F10002%25252F-1%25253FCAWELAID%25253D230006180038154520%2526utm_source%253dbing%2526utm_term%253d%2526utm_campaign%253dBing%252520Shopping_New%2526utm_medium%253dcpc%2526utm_content%253d_pcrid_75522711385578_pkw__pmt_be_pdv_c%2526ref%253dpaid%2526brand%253d%2526channel%253dShopping%2526jegspromo%253dthirdparty%2526msclkid%253d%257bmsclkid%257d%26rlid%3d7e7ae16c64491b8feed3bd4753735299/RK=2/RS=iE27osgyfIddEfhv3l0SpM2jsJY-;_ylt=AwrNGsc5NytcSiMAS5NXNyoA;_ylu=X3oDMTFiM3VlMTRqBGNvbG8DYmYxBHBvcwMyBHZ0aWQDQjY4MzNfMQRzZWMDb3YtZWFzdC1wbGE-;_ylc=X3IDMgRydAMx?p=fe+ford+roller+rockers

[NIsaacs]

I would also check the rocker arm pattern as well.   Rocker stands need a big cut off the bottoms to work with Trick Flow heads.

That's what I understand. I asked my son if the shop did that and he didn't know. I really hate to get involved too much and cause a rift with the machine shop. They are excellent at what they do ( I have had them do numerous projects for 35 years) but, they are not FE people or really even Ford.


They built my son a 501 BB Ford for his pulling truck and installed oem tapered seat, short, 14 mm threaded spark plugs in his Edelbrock heads....twice!

[blykins]

I would also check the rocker arm pattern as well.   Rocker stands need a big cut off the bottoms to work with Trick Flow heads.

That's what I understand. I asked my son if the shop did that and he didn't know. I really hate to get involved too much and cause a rift with the machine shop. They are excellent at what they do ( I have had them do numerous projects for 35 years) but, they are not FE people or really even Ford.


They built my son a 501 BB Ford for his pulling truck and installed oem tapered seat, short, 14 mm threaded spark plugs in his Edelbrock heads....twice!

Nick, it will be apparent just by looking at it.  Look into the end of the heads, like you're getting an end-view of the rocker arm.  If they haven't been cut, the rocker tip will start way towards the exhaust and roll to the edge of the valve as you roll the engine over.

[NIsaacs]

Thanks Brent, if I can get there before they button it up I will look at that geometry, you would think they would know that, but....

[NIsaacs]

Update:

He drove it and says it revs like a small block. He says it is plumb wicked, the 12.50 street slicks go up in smoke. He is running a FiTech system, not sure which one.

Worthless without pictures....can't post one for some reason....

https://www.turbodieselregister.com/threads/1970-ford-f-100-4x2-build.261034/#post-2581589

https://www.turbodieselregister.com/threads/1970-ford-f-100-4x2-build.261034/page-2#post-2620738

[badcatt]

I was able to load them here. Nice looking truck.

[NIsaacs]

badcatt, thank you!

[frnkeore]

If Blair is still following this, I'd be interested in what the machine work costs, to do a set of the flanged sleeves.

[TomP]

Posted on Turbodiesel site.  Don't those people hate gas engines?
Nice to hear it's all worked out. If it holds coolant it's probably going to be OK.

 I have a 64 block that i've put 4.28" as well. And possibly need to do that with my other marine block since it is at 4.270" now with the many honings on a 4.263" bore.

[NIsaacs]

Welp, about 20 street miles....lost two mains and a cracked block between two cylinders....probably going to be hard to find a stock bore block so he can reuse the pistons.

Have you hugged your Cummins lately?

[Tommy-T]

Seems I'm always late to a conversation.

The C4 top oiler in my blown Mustang had 8 sleeves. The block was .030 when I got it and a sonic check showed several spots at .070 and thinner. So it was sleeves or junk it. After spending $1500 in block work at the machine shop I took it home and assembled it. It ran for 5 years, mostly car shows and such, but it never achieved really good ring seal and after a couple of years it would "use" some coolant.That is not to say the motor didn't run good...put 8lbs. of boost to a 454 inch FE and things get exciting!

I eventually sold the car and the new owner broke the cast 428 crankshaft right behind #1 main within a couple of months. I bought him a new Eagle crank because I felt bad. BUT, when he took the block to the machine shop for cleaning they found 3 cracks between adjacent cylinders on the deck. He bought a BBM block and is happy as hell with it now.

The point of all of this is 3 things. 1.) I think I'm done with forced induction on my FE motors. But if I do it again it'll be with an aftermarket block and an aftermarket steel crank. The learning curve is VERY fast with a blower and I've got a couple sets of $1000 dollar pistons to prove it. 2.) Say NO to 8 sleeves. Really, say no to sleeves next to each other period. 3.) If the machine shop says your block needs $1500+ in machine work, put that money towards an aftermarket or NOS block.