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Messages - X33RS

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Garage Talk / Re: Muscle car assembley line video
« on: November 16, 2017, 07:43:14 PM »
Neat video.  At 2:44 those 348/409's in the back row all appear to have something written on the passenger side cylinder heads.  Very clearly appears to be on top of the paint too.  Pretty interesting.  Thanks Mike.

Garage Talk / Re: Tire age vs. risk
« on: November 02, 2017, 03:20:55 PM »
I keep my trailer tires covered.  I agree it's a good idea to protect from UV rays.  Didn't help mine in the one instance I posted however.  The heat gets to them too.  Black top is hot with the sun beating down on it, causes belt separation when the tires overheat.  When they decide to come apart, they literally COME APART.  If I could post pictures I'd show a few of my escapades.

No way I'd trust 17 year old tires, even if they look fine. 

Garage Talk / Re: Tire age vs. risk
« on: November 02, 2017, 02:50:33 PM »
This is even more prevalent here in Arizona.  Or any of the South Western states for that matter.  Constant sunshine and hot black top wreaks havoc on tires.  There are always blown tires on the roads around here, especially in the summer time.  I see at least 2 or 3 a week.  Under inflation is another issue that creates more heat.  I always run near max cold air pressures per tire recommendations and I check them frequently here.

I don't go more than 5 years or so on a set of tires, whether they look good or have tread life left or not.  I blew a left front on my truck, tire was only 3 years old. Literally exploded at 70 mph with no warning signs.  Did $3500 damage.  A year later I blew a trailer tire, left rear.  Those tires were just 4 years old.  I replaced all four tires in both incidents.    I also prefer to spend more money and buy good quality tires.  I prefer Michelins but they don't always make the size I need.    Anymore, when I'm planning a trip, I'm usually buying a new set of tires before I leave.

ALWAYS carry a spare too.  The way tires let go here in Arizona, a can of fix-a-flat isn't going to get you back on the road, lol.

Something else it's taught me.  I don't care to keep pace on the highways with people.  Most go 85+ here.  70 is about my limit.   When you have a left front go at 70, it's a butt puckering experience.

Garage Talk / Re: Tri Power
« on: October 20, 2017, 08:09:43 PM »
Well, I don't know if it's an ideal way of making HP with all the aftermarket parts we have today.  I just know that trick used to be done decades ago and it worked under the right circumstances.
One detail about that engine that's worth mentioning, he ran a real set of L88 aluminum heads on it.  Back then there weren't a lot of good aftermarket options.  But now we have excellent aluminum heads available that don't need huge intake runner volume to flow big CFM.  Most new heads today are flowing better with smaller ports.

My square port AFR's are only 305cc intake runner (compared to stock GM stuff at 315-320+)  Yet my AFR's flow 370 cfm out of the box with no CNC work.  GM heads weren't even close to that.

Garage Talk / Re: Tri Power
« on: October 20, 2017, 01:23:04 PM »
. Can I use oval port intakes over rectangle port heads? .

This is generally the preferred method when trying to gain velocity in the intake track, at least it was 20 years ago.  Buddy of mine for years ran his street/strip 68 chevelle this way.  427 with square ports, then ran a Victor Jr. oval port intake on top.  Tony Bischoff (multiple EMC winner) built the engine and it made fantastic power for a small engine.  The all steel chevelle ran 10.60's at 125+ with a  small tire and stock suspension (no back half) and he drove it on the street everywhere.

General Discussion / Re: "DZ" grease pencil mark
« on: October 17, 2017, 01:13:03 PM »
I seem to remember a picture of a as delivered car here or ? that was to show paint overspray on the exhaust manifolds. I remember it having grease pencil marks on the head.

If it's out there I'd love to see more pics.  James' picture is a great example of what is an original 69 photo, but I can't figure out what's on there.  Bill's car had the stripes on the head that he took great photos of.

General Discussion / Re: "DZ" grease pencil mark
« on: October 16, 2017, 01:36:49 PM »
Here is the best I could get in photoshop... I enlarged and then manipulated hue saturation and lightness...
Here is the best I could get in photoshop... I enlarged and then manipulated hue saturation and lightness...

   Thanks James.  There is definitely something there.  It doesn't appear to be the dual racing stripe deal I've seen before.  If it's letters my imagination isn't working.  What are your thoughts??

General Discussion / Re: "DZ" grease pencil mark
« on: October 15, 2017, 03:30:15 PM »
I'll have to get my wife involved, I can't enlarge it anymore than what it is.  But I appreciate the pic Bill.  As it is though, I think I do see something there.

General Discussion / Re: "DZ" grease pencil mark
« on: October 15, 2017, 12:59:09 PM »
Great discussion.  I don't mind what it's been morphed into.  I think it's helping to possibly understand, and I love the pictures.

I could possibly see the need for the engine code to be written on the head for the line workers as demonstrated on that 68 photo.  I can only imagine after doing the same thing day in and day out that all these engines just start to look the same after a while.  An easier way to identify to lessen mistakes does make sense.

But as Kurt mentioned, he's seen more on 67-68.  I've never seen stickers used on the small block stuff.   So what changed to not see the hand written marks as often (or not at all) on 69 SBC's???  Other than the alternator location obviously. 

General Discussion / Re: "DZ" grease pencil mark
« on: October 13, 2017, 10:41:43 PM »
Here is one picture sent to me. It was taken in '68, notice the 'MO' on the head. As Bryon noted it was easy to spot a DZ motor. I am sure we can spot a DZ motor easy enough but maybe the person who had to pull many motor’s off the racks for in-line builds in a fast paced environment was not as knowledgeable about what to look for so a hand written block code would have made it easier and less prone to error and time wasted to get the correct one.
 It's great having CRG back up to have discussions like these.  :D


That's interesting.  Notice on a 68 it's on the passenger side because the alternator is opposite??   Reversed on 69.   That tells me these engines were fully dressed so they were making their notations where they would be visible....   Do you guys come to that conclusion or am I way off base?

General Discussion / Re: "DZ" grease pencil mark
« on: October 13, 2017, 06:46:41 PM »
Very cool James, first I've seen of that.  Neat to see the writing right side up with the block up side down.  Tells a story.

I have a couple of BBC's here that revealed grease pencil markings on the block after hot tanking.  I figured hot tanking for sure would take that off but it didn't.   I'm guessing this stuff stays somewhat preserved if you're looking for it.  Paint doesn't stick well to the grease markings so even though they are painted over, after a while they tend to bleed through it seems.
  I also have a 1966 HE code 327 here that has HE written on the side of the block in huge letters.

What Bill showed are the dual stripes I was talking about.  I've seen that before.  I always thought that was to help a line worker quickly identify a double hump head, but just a guess.  I've only seen engine designation stuff on the sides of blocks, similar to what James posted and similar to what I have here.  I haven't seen DZ written on the front of a cylinder head until most recently so I thought I'd ask the question here.  Thanks guys.

General Discussion / Re: "DZ" grease pencil mark
« on: October 12, 2017, 09:38:21 PM »
So was this done at the plant originally?

I've seen original dual stripe marks on the cylinder heads so I know that was done off and on at Norwood.  I'm just curious about the "DZ" I've been seeing lately.

General Discussion / "DZ" grease pencil mark
« on: October 12, 2017, 01:56:33 PM »
I've looked at 2 very nice 69 Z/28's recently that had DZ written on the passenger side head.  Both Norwood cars.

Was this a common thing or another case of someone adding something that wasn't there originally?

Decoding/Numbers / Re: Caveat Emptor..funky rivets
« on: August 29, 2017, 05:21:30 PM »
If it can be verified definitively through the vin stamp, then there is no deception with the DZ stamp, they simply replaced what was already there.  On the flip side others would still complain if there were no stamp at all so you can't win either way.  However, with the documention of what was done, the rebuild that included decking, all disclosure, then there really shouldn't be an issue.  The vin stamp proves it's legitimacy.   In this case, on top of all that,  things were also verified with Jerry McNeish, whom some consider the last word, or at least good reassurance of what you're buying. 

   Without the vin stamp at the oil filter obviously that changes the whole perspective.   In this case, December and onward for 69 Norwood cars,  it's a benefit making it easier to document.  We don't necessarily have to weigh everything solely on that engine pad stamp.  I agree, nice to have, but......

Decoding/Numbers / Re: Caveat Emptor..funky rivets
« on: August 29, 2017, 02:55:48 PM »
It seems they've added that the block was decked and re-stamped during restoration.  To me that just means non born with block.  It may be the born with, but no way to prove it other than hearsay.

Actually there is.  Norwood was already stamping the vins at the oil filter well before this Z was produced.  Wouldn't really matter if it was decked or not, if the vin is still legible at the oil filter and matches the (untampered) hidden vins on the car, that answers the question.    If the car in question is a real Z, and the vin stamp on the block is legit, there leaves little doubt that it has it's born with DZ motor.

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