Messages

1

Decoding/Numbers / LA built Z28's

« on: March 10, 2007, 10:07:11 AM »

Whoops, oh yeah my 4 bolt block is 3932386 cast on I 25 8

2

Originality / Re: Is my DZ motor a phony?

« on: March 10, 2007, 09:55:31 AM »

Just for the record my car was built 12B second week of Dec 68 Tr 712 ,  71 71 PNT, whats all this about 12B being a cut off week ? Vin 124379L5128XX I have a DZ that was cast no 3932386 and date I 25 8

3

Maintenance / Re: What octane should I put in my '68 ??

« on: March 10, 2007, 09:30:28 AM »

Well, thank you for all of the answers.  I really appreciate it.  There's so many different things that you hear out there.  I used to work at O'Reilly's and people were always asking me which fuel additives and lead subs. to buy and so on.  As many products as they carry to add too your existing fluids, it's mind boggling.  I don't think anyone has all the answers.  I do think that a lot of the stuff is just marketing gimmics.  I do have my vacuum advance hooked to full manifold vacuum.  Although I should probably check and see if it's functioning correctly.  I need to take a close look at the distributor and check things over.  I adjusted the points last summer, but I'm sure it could use a good tune-up.  I'm hearing quite a lot about the advance springs also.  I never have fooled with them, but I may try it on this one to see what kind of a gain I can get out of it.

Why you have that distributor cap off grab the rotor and twist it, the springs should snap back. If they dont either the springs are weak or the centrifugal advance mechanism is seizing  up. This one problem has made engines temperamental and driven guys bananas over the years than anything else.

4

Mild Modifications / Re: 327 Engine Mods.

« on: March 10, 2007, 09:01:07 AM »

Looks like a nice street beast. I may be posting a bit late. But have you thought of using a sloid lifter cam ? They are very responsive. Here is a good example of a nice cam to use. It is the Lunati PN 20108 LK . It is particularly well suited to a 10 to 1 compression ratio 327. It is lunati's copy of the Duntov cam.
 It's static compression ratio is 10 / 1

Dynamic compression ratio is     8.23 / 1

So it will run quite happily all day on 91 octane gas

Most importantly the powerband is between 1800 and 6200 rpm. Thats a 4400 rpm wide band !!
This is quite a good cam for a light Camaro with a 4 speed stick, you will have plenty of low down torque

The valve lift  is .485 intake and .503 exhaust, so a good new set of chevy LT1 copy springs should live for a long time in this engine provided you dont miss to many shifts. 

5

Restoration / Re: 1969 302 DZ Heads

« on: March 10, 2007, 12:45:59 AM »

Thanks Jerry, I will go have a look and send a pic. Mike

6

Decoding/Numbers / Re: X11 z/28 on ebay??

« on: March 09, 2007, 10:48:04 PM »

Well,,,,,, some people get bid fever at some of these auction sites.

7

Restoration / Re: 1969 302 DZ Heads

« on: March 09, 2007, 10:41:48 PM »

i would probably like to keep mine original. the body of the car is going to be the fun.....Oh boy. It has been in CA most of its life, But I have and will be replacing most outside panels.

8

Decoding/Numbers / LA built Z28's

« on: March 09, 2007, 06:52:20 PM »

Great, because I was wondering, my camaro comes with the 4 speed and consul guages but no rev counter

9

Restoration / Re: 1969 302 DZ Heads

« on: March 09, 2007, 06:49:42 PM »

So what I have got here is some stock standard Z heads that came off that block then. Thats another question the block was cast on I 25 8 .....  25th Sept 1968 and the build date on the car is 12B.... 2nd week Dec 1968

10

Decoding/Numbers / LA built Z28's

« on: March 09, 2007, 05:43:23 AM »

Were any Los Angeles assembled cars Z28's ? Partial body vin is 124379L512XXX Car was picked up in San Diego, before shipping.

11

Restoration / 1969 302 DZ Heads

« on: March 09, 2007, 05:28:00 AM »

Hi, this is my first post on this forum. I am restoring a 69 Camaro. The heads are 3927186 castings witha date code of J 11 8 and J 28 8. They are the big valve 2.02 and 1.6. Untouched and unported.What I want to know is, did the Z28 motors heads come with guideplates or without in stock form ? As these heads have no guideplates and the (I presume) press in studs.

The cylinder block that these heads came of is  casting 3932386 4 bolt block date code I 25 8 The build date of the 69 body is 12B.

So is it possible the early 69 camaro Z's came out with the non guideplate heads and the later model 69 Z's as the production progressed come out with the guideplate heads.