New Snyders head

[walls]

There are some small inconsistencies in the combustion chamber.

Should I smooth these out before installing? Is it worth worrying about?

[denniskliesen]

I would contact them and voice your concerns. Ask them what they would do if it were them making the purchase.

[Ernie Vitucci]

Agree...Ernie in Arizona

[Tod]

That is just the texture of the metal as it is cast against the sand. Perfectly normal.


Tod

[41plym]

It looks pretty nice to me....

[modelAsteve]

Sponsored Links (Register now to hide all advertisements)

I would knock the bumps down a little to eliminate hot spots- just run!

[Chuck Sea/Tac]

I would have it checked for straightness, as not only my one, but several others I’m aware of weren’t flat. Several lost gaskets.

[Mike V. Florida]

Originally Posted by Chuck Sea/Tac

I would have it checked for straightness, as not only my one, but several others I’m aware of weren’t flat. Several lost gaskets.

I read that Steve of Bert's in Denver has installed 260 of them and only found 2 not flat?

[Tod]

Originally Posted by Mike V. Florida

I read that Steve of Bert's in Denver has installed 260 of them and only found 2 not flat?

I've made upwards of 10,000 of these and there seems to be one or two chronic complainers. Some complaints we hear are so absurd you wouldn't believe it.


Tod

[Chuck Sea/Tac]

Originally Posted by Tod

I've made upwards of 10,000 of these and there seems to be one or two chronic complainers. Some complaints we hear are so absurd you wouldn't believe it.


Tod

Well, I know of at least three people with warped heads. Mine was .008”, right out of the box.

[Tod]

Originally Posted by Chuck Sea/Tac

Well, I know of at least three people with warped heads. Mine was .008”, right out of the box.

What caused the warp? And what inspection equipment did you use to determine that figure?


Tod

[Fordfan29]

I use a 5.9 Snyder's head and smoothed the combustion chambers with an air grinder to eliminate the potential hot spots as in an earlier post.

I also set the head on my bare block with out a head gasket and it rocked back & forth! It was warped several thousandths & had to be milled. Snyder's offered to ship another head but the first on took three weeks to arrive. After talking to them I had the head milled & sent them the bill and was reimbursed.

I had heard many suppliers machine green castings and they will move around after machining is initially done.

[old31]

I bought a 6.0 head from Snyders and the shop told me it was far from straight. The areas where the nuts go had to be ground and the water inlet had to be repaired.

But, 3,000 miles later it makes a heck of an improvement in performance.

[MikeK]

I ran two foundries for 30 years. The as-cast appearance in the combustion chambers is absolutely normal. I see no inclusions (sand, slag, etc.), no penetration/scabbing, no rat-tails, shrinkage, cold shuts, core shift, or visible porosity.

The head in the photo is absolutely normal. Should you wish a greater degree of finish within the combustion chambers take it to a shop experienced with polishing and CC'ing heads.

To sell a head with either hand finished chambers or fully CNC'd would add at least $100 to the end price.

Now, if you look at a collection of original Ford heads, bead blasted in the chambers to remove the carbon and reveal the original as-cast appearance, you WILL FIND a myriad of defects.

[MikeK]

Originally Posted by 2831A’s

Can you please explain why these heads are all warped out of the box!!

Yes. All metal and alloy parts contain internal stress when they are initially formed from a hot state. Over time that stress causes the part to change dimensionally as it ages. The majority of the dimensional change in gray iron castings occurs within 30 days of shakeout. Parts are generally held that long before machining if dimensional accuracy is critical.

Castings can also be artificially aged by intentionally subjecting them to heat/cool cycles. This is usually done on parts that have finish tolerances down it the tenths range.

Flat machined surfaces can also end up 'warped' if the clamping used during the machining operations stresses the part.

Even storage conditions of finished parts can affect dimensional stability. Lack of proper support imposes stress that will impart directional bias to the movement of the grain structure as the part ages.

Now, as to what is the specific problem with this run, you would have to talk to the foundry and machine supplier of the part.

[Wick]

I buy my 6.0 heads from Schwalm at Hershey. The head has already been inspected and surfaced.

[CarlG]

IMHO, all the surfaces in the combustion chamber should be like a "mirror finish". This keeps carbon deposits from forming and all the other problems that propagate from that, as well as permitting a better air flow in and out.

[24ruxstel1339]

As long as it's flat, I would run it.
Those casting imperfections are not a big deal...just my $0.02.

[Tom Wesenberg]

I agree with Mike. Those combustion chambers look fine, and there is no reason to send it back or complain about the head. I knew a guy who polished his heads and piston tops to a mirror finish on an Olds V8. When he honed the cylinders to install new rings, he didn't get the honing grit cleaned out very well, so he had worn rings in one week. He took the engine apart, and the heads and piston tops had the same coating of carbon, just as they would if he never polished them. Also, polished isn't always the best for flow.


I bought a Snyder's 5.5 head years ago, and it's still in the box. Just for kicks I'll have to check it for flatness, and see how the combustion chambers look.

[ronn]

That head looks pretty darn good!


Think about what you are paying-pretty darn cheap!