CRG Discussion Forum
Welcome, Guest. Please login or register.
Did you miss your activation email?
September 18, 2014, 08:53:15 AM

Login with username, password and session length
Search:     Advanced search
Welcome to the CRG Discussion Forum!
Forum registration problems: Make sure you enter your email correctly and you check your spam box first. *Then* email KurtS2@gmail for help.
104509 Posts in 12235 Topics by 4716 Members
Latest Member: Hgtech
* Home Help Search Login Register
  Show Posts
Pages: 1 ... 12 13 [14] 15 16 ... 37
196  Camaro Research Group Discussion / General Discussion / Re: 69 Z/11 L78 Pace Car "Unrestored survivor" on: April 28, 2014, 10:26:35 AM
As I have been told by more than one machine shop, Big Blocks almost always need align bore. I don't neccessarily agree as bearing wear should be a good indicator of align bore. Whether a "wives tale" or not, I have never verified what I have been told and it is this: "When Chevrolet align bored the Big Block at Tonawanda the fixtures were designed to do the Small Block and the boring bar was not long enough to do the Big Block in a single step, so the block was indexed 180 degrees and did the back two mains on a second pass coming in from the back. This is why B. Blocks always should be align bored.". Not saying this is the gospel, but how it was explained by more than one shop. I personally, do not like doing machine work for sake of just doing it, but rather, try to just what is needed or neccessary. Sometimes it is hard to know where to stop when doing machine work. Decking just to true up surface would probably leave evidence of block numbers as only .010 or .015 should be all that is needed. If I were taking more off, I would consider doing more, like making deck have zero deck height (blueprinting) and making all rods and pistons even. This would improve the "quench area" and improve combustion and full burn across top of piston increasing power and reducing detonation. If piston is clean across top (farthest away from plug) upon tear down, this indicates that fuel is not being fully burned leading to lost power. Even more critical with a domed piston. Ideal quench area (distance from piston flat on top to deck)is .030 which is achieved with a composition head gasket and zero deck height machining(this according to Smokey Yunick). I built a 350 like this once. Of course, this leads to more machining as heads have to be CC'd. So to wring out extra ponies, it gets exponentially more expensive to achieve as you approach 100 percent efficiency (not possible). Basic performance tricks and machining yield close to 80 percent and is a practical approach for most. Stack up tolerances effect so much of a builds performance and that is why two identical stockers can have such a varying difference in performance.
197  Camaro Research Group Discussion / General Discussion / Re: Had Camaro out first time on: April 28, 2014, 10:01:06 AM
What's not to like, cool place to cruise and car looks great! When we would cruise at a drive-in, BITD, We would back into the spot to show off our ride and, I'll add, be ready for a match race out front of the Big Boy on the long straight 2 lane. Sigh! Those were the days. Wink
198  Camaro Research Group Discussion / General Discussion / Re: 69 Z/11 L78 Pace Car "Unrestored survivor" on: April 27, 2014, 07:29:22 PM
Why would you deck a standard bore block ? If the bores were in that good of shape, the deck surface should be pretty flat. Hard to imagine a 92,000 mile block that didn't require some overbore, considering yesterday's materials. Could be wrong, but normally one might require the other. That early a casting for a May car ? One month, maybe two, but 9 is unlikely.

Regards -

Machine shops, what are they in the business of doing? Why, machining, of course!! I never and mean NEVER had an engine where the shop did not recommend it all. Regardless if I thought it needed boring or whatever after checking with my own guages/mics, the shop wanted to do everything to the engine. Two reasons: They want to insure, as much as possible, the engine lives, protecting their reputation. 2, That (machining) is their business, so of course they will sell what work they can. The material and casting/machining variances from that era, as pointed out, almost if not always guarantee boring, align boring with relatively low miles. I only insisted that the decking was not to be done to protect the numbers after some discussion with shop owner.
199  Camaro Research Group Discussion / General Discussion / Re: 69 Z/11 L78 Pace Car "Unrestored survivor" on: April 27, 2014, 04:54:25 PM
Saw that car and ain't buying that claim. Car, according to Vin is late April/early May 69. Block casting is August 68. Stamp by filter looks suspicious, but will hold my comment as I have not seen that many oil filter pads. Most of my cars have had stamp on pad. Also (conveinently) decked pad, I may add. Just not giving it the "Survivor" claim stated.
200  Camaro Research Group Discussion / General Discussion / Re: How long have you owned your Camaro? on: April 25, 2014, 09:23:29 PM
Mikes 69 coupe-Very very nice! LeMans Blue-a favorite among myself and many here on site. Welcome to the site,congrats on the long "affair" with your car-nice story
Daytona Yellow Z/28- That is a sweet looking ride-Love Big Blocks! Nice to see the old pics and congrats on your long time owning and commitment.
Dino67 - Pics! need pics. Sounds like a real righteous ride. L78 Wow! Welcome to the site and keep posting to all you great guys with great cars.
201  Camaro Research Group Discussion / Originality / Re: Front Bumper Guards on: April 24, 2014, 04:35:22 PM
My car, as well, has (had) them (front guards). I look at a lot of 69's and check out what options they have. Like these front guards in topic, I am surprised how many cars appear to have rear defrost, when it was scarce, also, according to production figures. I wonder now how many cars had several dealer installed options that ,of course, are not recorded? That may explain why seemingly scarce options are more prolific than production figures indicate. This is not considering the recent increase in adding options to restos as more and more repro parts become available.
202  Camaro Research Group Discussion / Decoding/Numbers / Re: vin numbers on: April 23, 2014, 08:36:56 PM

   . Automatic tranny.

Could you tell what kind of trans? 2 or 3 speed? TH400 could possibly indicate a SS Big Block car.There are so many things to check that may be definitive of what car is or was with TT #'s being somewhat useless as stated on a 68
203  Camaro Research Group Discussion / Originality / N44 in non HP 69s on: April 22, 2014, 08:31:11 PM
My Yellow 69 has N44. I have conversed with Jon Mello about this car. It is a 3E Nor 307 4speed Saginaw, drum brake car. I am looking for other non Z or SS car owners with N44 (confirmed) to see just how unusual this option occurrence is. RPO production sheet shows 2161 with this option (non Z, SS). This is a manual steering car also. Other N44 owners chime in please. Also, did all SS cars receive N44? My L48 car has manual steering and it appears to be a Non-N44 setup. I guarantee these cars are untampered originals. Thanks CRG. Smiley
204  Camaro Research Group Discussion / Originality / Re: Parts found from the Original owner of my 1969 Z/28 on: April 22, 2014, 06:55:46 PM
Well under date it says: 03222. Anybody have any ideas?
Or anybody have an original license frame bracket that can confirm on the "C" stamp?
http://www.camaros.org/forum/index.php?topic=10725.0 All you ever wanted to know about front license bracket, but were afraid to ask. Nothing on package date, at least , I don't think there is, but plenty about stamped letters and ID of original Bullitt65.
205  Camaro Research Group Discussion / General Discussion / Re: Bad Luck is Better Than No Luck; Right? on: April 21, 2014, 04:23:19 PM
My experience with 11:1 slugs (closed chamber) are they were meant for square port heads. The corner of the dome will hit the combustion chamber on oval ports. Are the pistons made for oval ports? Not that this would cause your problem, just an observation and my knowledge of these engines. Back when I was a teen, a guy (kind of a butcher, I will add) told us he did this piston swap all the time and just revved the engine to shave off that little corner that hit. I have a set of pistons that had "gone through this treatment". Like Janobyte, I am suspect of a timing problem or a geometry problem. Can you take a pic of all affected PRs along with an undamaged? It might shed a little more light?
206  Camaro Research Group Discussion / General Discussion / Re: Bad Luck is Better Than No Luck; Right? on: April 21, 2014, 01:39:27 PM
I had a feeling you were just venting as I think you are about as savvy a Chev guy as they come. I also know you already had thought of all I suggested too. Some of those P-Rods have one end hardened for the guide plates. May have been installed wrong? I had a P-Rod shatter on the lifter end once. Usually, gasoline or geometry causes bent P-rods. I have also seen some Sm. Blocks P-rods go through the rocker. Are the P-Rods 5/16, 3/8 or 7/16 in.?
207  Camaro Research Group Discussion / General Discussion / Re: Bad Luck is Better Than No Luck; Right? on: April 21, 2014, 12:53:30 PM
Many things come to mind. Very hard to give opinions from far away though. I have seen old gas, more so with newer type gas blends, cause gumming and sticking valves. This could have caused the valves to hit piston tops and an interference that caused damage. I have seen one head milled more than another causing geometry problems. I would use an indicator to determine Cam dimensions by setting the plunger on the retainer and setting lash to zero (may have to bottom out Hyd. lifter). If cam seems to indicate a high lift (.550 or larger) I would use a rocker mounted spring compressor  and install a set of light springs using indicator you can check for valve to piston clearance. Lastly, while the original two springs are off, have them tested for spring rate. Floating a valve on Big Blocks are more common, since the components are heavy and springs lose tension quickly. It could be floating the valve and damaging pushrod.
208  Camaro Research Group Discussion / Originality / Re: Amazing 69 Z/28 Survivor on: April 20, 2014, 06:44:05 PM
How did his jacking instructions not yellow ? No "spider web" cracking in the stripes ? Top edge of the spoiler flawless. Once again all I can say is wow. I can see were you would be excited going over that car in person.
Yep, its been a joy and wish all of you could participate in looking it over as we have and will continue. Guess we will try to be your eyes....... Smiley
Chick, I am thinking that you could provide a series, say each week (later to be offered on a DVD for one's library) that could highlight components and areas of the car. This would be an incredible restoration tool and valued documentation. How many pristine examples of 69 Z's exist? JohnZ's car and that one with, like, 2000 miles on it?
209  Camaro Research Group Discussion / Originality / Re: Amazing 69 Z/28 Survivor on: April 19, 2014, 10:09:05 PM
I can't believe that the plating is still on the booster and MC cap. That is incredible! What a find!
210  Camaro Research Group Discussion / General Discussion / 14x7 ralley wheel on CL on: April 19, 2014, 09:58:44 PM
FYI  http://lexington.craigslist.org/pts/4419936791.html  Seems like a deal IMHO
Pages: 1 ... 12 13 [14] 15 16 ... 37
Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2013, Simple Machines Valid XHTML 1.0! Valid CSS!
Page created in 0.324 seconds with 18 queries.