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Messages - Tx-Z 302

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16
General Discussion / 69 cowl tag
« on: October 13, 2018, 09:56:47 PM »
What does NBR mean on the trim tag? It seems to be where it should be LOS or NOR.
Thx.

17
Originality / Re: Z sticker on glove box
« on: October 06, 2018, 08:13:29 PM »
Chris, I am away on vacation & can not get to my glove box cover, can you measure the diameter of the "CUP" holder recess to the nearest 1/32"?

JIM

It's beveled so I'm not sure if which measurement you want but the floor of the holder is 2-9/32 ?

18
Originality / Re: Z sticker on glove box
« on: October 05, 2018, 07:46:14 PM »
Chris, I am away on vacation & can not get to my glove box cover, can you measure the diameter of the "CUP" holder recess to the nearest 1/32"?

JIM

I'm at the station till 7am. I will post the measurement tomorrow.

19
Originality / Re: Z sticker on glove box
« on: October 05, 2018, 12:55:51 AM »
Good for you, glad you found it. Now where is my carb and air cleaner? I bought the correct carb for my car and had it rebuilt by Daytona. It's SOMEWHERE in my shop still in the plastic bag from them.  I found the box with the right hubcaps, the '63 SS caps. I am running out places to look and the rest of the engine is done,in the frame, painted and ready to fire.
[/quote

Sorry, you must look in every box and then it will be in he second to last box lol

20
Originality / Z sticker on glove box
« on: October 04, 2018, 11:19:44 PM »
I have finally found the box that had my glove box door protected. disregard the black paint on the out side, some where in its life someone rattle canned the whole interior with black semi gloss, my interior is gold and appears greenish more than gold. My sticker is very brittle and been exposed to the elements. When I first got the car the glove box was in the open position with no glass and the hinge was rusted so bad the door wouldnt close. I have soaked the hinge with penetrating oil to the point I can move the hinge in its full range. the sticker and a couple of places on the door itseld had mold growing I very very carefully wiped away all I could but it left black stains. I am considering placing a this piece of plexi glass on the whole door back to preserve the sticker?  thoughts?

21
Originality / Re: 1968 Z28 water pump bypass fitting
« on: September 18, 2018, 01:51:26 AM »
Hex
X2 on hex but limited originals observed but believe that to be what is considered technically correct. Here is an original with stampings.


is that plated brass? or steel with yellow/gold primer?

22
Forum members that live in the country of Texas should call Patti or Kerri at Firewheel Classics.
They are in Wiley, just north of Dallas. Very good prices, several specials run throughout the year, THE best customer service ever!   1-800-711-0125

23
General Discussion / Re: Setting up valve springs?
« on: September 13, 2018, 12:49:04 AM »

Not a pro here, just trying to help.
Darrell posted some good links.  Those guys are racing and do a lot of tear down, check and reassemble but maybe you will just build it once and drive?  Those guys will add shims as the spring looses pressure over time until you cant add more shims.  At that point, they replace a spring. Tear downs and checks happen pretty regularly for those guys.   

I do not do that.  Maybe pay attention to what they are doing, and just do it one time to set up your heads. 

The spring requirements are set by the cam supplier.  The required seat pressure and spring rate are what you need to keep in mind.  The "spring rate" is how stiff it is as it compresses.  The spring will provide a stiffness described as "pounds of force per inch of deflection".  How stiff is the spring?  Just math.... (Open pressure-seat pressure)/(installed height-open height) = Spring rate....expressed as "pounds of pressure/inch of deflection".  "Open pressure" comes from the "open height" spring specs, not the actual cam you are using so don't get confused.  Springs can work on more than one cam so the spring spec needs to be generic.

Installed height gives you "seat pressure".  Full actual cam lift gives you "nose pressure".  Need to have enough pressure to control the valve train but not so much that it wears or damages components.  Your valve train cost and complexity will increase as spring rate goes up. 

Add shims to provide the required seat pressure on a spring that meets the spring rate required but make sure you have at least .030" available additional spring travel available before you go into full spring bind zero space between the coils.  Watch the actual installed nose pressure to determine if you need to upgrade the studs, rockers, seals, pushrods, guide plates, etc.
Thanks for the info. I watched the videos in the links and understand the general principal of what he's doing.....finding values to be able to add shims over wear time to increase the usable life of the springs while maintaining his proper pressures.   I guess I'm wondering if I have a virgin head and buy a cam/lifter/ spring set. Do I still need to do this?  I bought a comp cams complete cam kit ?

24
General Discussion / Re: Setting up valve springs?
« on: September 11, 2018, 01:13:11 AM »
Learn it and use it.

https://www.youtube.com/watch?v=MsjT1rZZ90M

https://www.youtube.com/watch?v=s2aWcSIE198

http://www.kenlowe.com.au/Documents/Docs%2099%20-%20Procedure%20for%20setting%20valve%20springs%20101022-2.pdf

http://www.kenlowe.com.au/Alpha-Index.htm

Good Lord! I've built several engines in my time, degreed came, recurved distributors, etc etc etc.... But never really messed with valve springs other than getting the ones recommended for my cam?  Have I been leaving power on the table or is this a wear and tear issue?

25
General Discussion / Setting up valve springs?
« on: September 10, 2018, 11:07:57 PM »
So what's the abridged version of how and why " setting up valve springs" ?

26
Restoration / Re: GM hood hinge springs
« on: September 09, 2018, 07:25:23 PM »
So what's this washer trick for spring replacement?

27
Originality / Re: 1968 Z28 water pump bypass fitting
« on: September 09, 2018, 07:19:14 PM »
I'm in the market for one of these!

28
General Discussion / Re: 814 alternator on TC site
« on: September 05, 2018, 02:05:19 AM »
I think it was the other way around. The 4 was too close to the 1.
You just might be right Jon ! Lol

29
General Discussion / Re: 814 alternator on TC site
« on: September 04, 2018, 09:13:25 PM »
Not surprised that one sold quickly!

Yes it did. Interestingly enough the 1 and 4 spacing on this one is a bit wider than most? Kinda like the one I was advised against. Lol

30
General Discussion / Re: Need help on GM intake manifold
« on: September 02, 2018, 01:09:45 AM »
L48/L82 350

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anything