67 Stamp pad opinions

[Richard E.]

Re: 67 Stamp pad opinions

sorry wrong thread

[Steven S.]

Re: 67 Stamp pad opinions

Again, I'd say the shop ran it through their shot blaster, that would give the pad surface that texture.

[Michael G.]

Re: 67 Stamp pad opinions

Steven,

You've repeated your opinion twice. Why do you feel so strongly about shot peening the block as it relates to broach marks not appearing?

All.....no defense for lack of not seeing broach marks, could the shininess of the block diminish being able to visually seeing the broach marks.

[Richard E.]

Re: 67 Stamp pad opinions

Why would anyone "shot peen" the entire surface of the block?Very risky as the cylinders might get "peened". but what do i know...

[Steven S.]

Re: 67 Stamp pad opinions

Michael,
Have you ever used a shot blaster? If you did you would know what it does to a metal surface .

Richard,
I don't know that specifics of that block, but if it was to be bored it really wouldn't have made a difference if they ran it through prior to machining .

Why doesn't the owner just ask the shop what they did to clean up the block?

Steve

[Joe R.]

Re: 67 Stamp pad opinions

Joe

Can that happen when prepping the block?

Bob,

No unless you just decided to mill the block and then sand it down until it was smooth.

Something smells here so I agree with others to check this out further before dropping some hard earned money on a 427/400 with four bolt mains and smooth as a babies behind.

JR

PS. Ooops, I just looked back and wuz confused about this being a 427/400 with 4 bolt mains since it is and 435HP JE stamp. But still concerned about that smooth block and that DIDN'T come from shot peening. I'll shut up now!

[Michael G.]

Re: 67 Stamp pad opinions

Michael,
Have you ever used a shot blaster? If you did you would know what it does to a metal surface .

Steve

Why don't you take a moment to educate us on the shot peen process. You appear to know something about this.

[Tom S.]

Re: 67 Stamp pad opinions

Imagine for a minute we are in Denmark. And everyone is out of cheese!

[Steven S.]

Re: 67 Stamp pad opinions

Why don't you take a moment to educate us on the shot peen process. You appear to know something about this.

There are only two types of shot blast processes I'm aware of, first is a basic blast "cabinet' much the same as a glass bead cabinet (but much heavier duty) which air is the propellant and one would manually have to blast the entire surface, the second is a "wheelabrator" type which the part would be fed in on a conveyor and the blast process is mechanical and completely automated. Shot blasting will give any steel part a sort of "sheen" because as a result of blasting the steel shot against the part you actually smear a thin layer of steel on it. It will also give a cast surface a real nice gray color as well. I have only myself used the cabinet type, but the wheelabrators are very popular with shops since they are basically hands free.

Like I said, IMO that block looks shot blasted, it certainly didn't just come out of the hot tank looking like that, and without question the process would ruin any trace of broach marks.

Steve

[Terry M.]

Re: 67 Stamp pad opinions

Why don't you take a moment to educate us on the shot peen process. You appear to know something about this.

Michael,
A quick Google search yielded:

http://www.wheelabratorgroup.com/xq/aspx/b.2/qx/brands.htm

Search on abrasive blasting equipment. Of course tomorrow I could walk across the street (Route 66 for you sentimentalists) and see what the engine machine shop over there uses to clean their cylinder cases. Last time I had occasion to use their services (about two decades ago) they used heat to clean them.

http://www.merchantcircle.com/business/Weimer.Machine.708-749-3420

[Loren L.]

Re: 67 Stamp pad opinions

Could I ask for a different (and better) picture? Or even better, one of the VIN and one of the Assembly stamp.

[Bob H.]

Re: 67 Stamp pad opinions

Hi

I will be back home this weekend and will post some better pictures