CRG Discussion Forum
Welcome, Guest. Please login or register.
Did you miss your activation email?
April 23, 2014, 03:29:08 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.
97442 Posts in 11712 Topics by 4581 Members
Latest Member: Cooper48
* Home Help Search Login Register
  Show Posts
Pages: 1 [2] 3 4 ... 24
16  Camaro Research Group Discussion / Mild Modifications / Re: Vacuum Advance - Converting to Full Manifold Vacuum on: October 05, 2013, 01:03:47 PM
Steve - No dashpot.  Carb was just rebuilt, so it's clean.  The shaft bores were bushed during the rebuild, so maybe it needs a little time to settle in.  It's just strange that it only does it with the engine running.  It will be just above the stop when idling, then I shut the engine off and it closes against the idle stop.
17  Camaro Research Group Discussion / Mild Modifications / Re: Vacuum Advance - Converting to Full Manifold Vacuum on: October 05, 2013, 11:54:06 AM
Leave it on manifold vacuum, set your idle above the "whistle" point, and drive it.
Well, there is one other piece to the puzzle that I haven't told you (sorry for holding back).  With the stock return spring, the carb doesn't always like to return to idle - it stops just short of the idle speed stop screw.  If I blip the throttle or pull the gas pedal up with my toe it goes  back to a nice idle.  It only does this with the engine running, and when the engine isn't at full operating temperature (but not running on the choke).

Could too much vacuum at idle be trying to keep the throttle plates open?  I hate to throw a stiffer return spring on it because I'm worried about premature wear on the throttle shaft bores.

18  Camaro Research Group Discussion / Mild Modifications / Re: Vacuum Advance - Converting to Full Manifold Vacuum on: October 05, 2013, 11:47:54 AM
... but how is the seat of the pants feel during acceleration?
If its not pinging I would leave that alone.
The car drives great and pulls harder than I ever remember before changing the timing curve.  I have not noticed any pinging, and I'm running 93 octane fuel.

 Should be relatively easy to make a home-made limiter plate.
So, keep everything the same, just limit my vacuum advance to 10-12 degrees?
19  Camaro Research Group Discussion / Mild Modifications / Re: Vacuum Advance - Converting to Full Manifold Vacuum on: October 04, 2013, 11:52:31 PM
Update:
Here's what I ended up with:
9 degrees initial static timing
Idle timing with VAC connected = 9 + 16 = 25 degrees.
23 degrees of centrifugal advance
Centrifugal advance starts at about 900 rpm, and is all-in (9 + 23 = 32 degrees) at about 2500 rpm.  This is a little earlier than I wanted it to be all-in by, but the car doesn't seem to ping or knock under any conditions.  Should I mess around with even more springs to bump this up to 2800-3000 rpm??

The car runs great with the timing set-up as above.  However, there is one weird issue.  I have the idle set at 700 rpm per the manual, but I like the idle a little lower - around 500 rpm.  If I try to go below 700 rpm I get a loud whistle from the carb.  I contacted Cliff's High Performance, who rebuilt the carb.  He said that with my idle timing at about 25 degrees, I have too much idle vacuum (I measured it at 20") and that's what is causing the noise.  He says that to get my idle down, I'm closing the primaries too much and the airflow is whistling past them.  He suggested that I run ported vacuum to reduce the advance at idle, thus decreasing vacuum.

So, I hooked the VAC back up to ported vacuum and I get a nice idle at 500 rpm, but I haven't driven the car this way.  So, if I keep the VAC connected to ported vacuum, what are the downsides of having the idle timing at only 9 degrees instead of 25 degrees?  Should I give it a try?  

Under all other driving conditions, the distributor advance system should function the same whether the VAC is connected to ported or full manifold vacuum, correct?
20  Camaro Research Group Discussion / General Discussion / Re: I found a Sequoia Green Z28 with air plenum 9 k miles ! on: August 02, 2013, 03:16:29 PM
Just wondering what it would apprase for a bank loan.
Only 1 way to find out - have it appraised.
21  Camaro Research Group Discussion / Originality / Re: 68 Ignition Switch - No Ground? on: July 29, 2013, 09:59:21 AM
^^ I'll put that on my list.  Thanks.
22  Camaro Research Group Discussion / Originality / Re: 68 Ignition Switch - No Ground? on: July 29, 2013, 09:09:23 AM
Thanks Ed!  I have console gauges, so all is good.  I'll make a note and put it with my wiring diagram.
23  Camaro Research Group Discussion / Originality / 68 Ignition Switch - No Ground? on: July 28, 2013, 12:32:12 PM
I'm putting the dash back together on my 68 convertible.  It has the original ignition switch & harness that plugs into it.  The spot on the plug that corresponds to "GRD" on the switch is empty.  There is no sign that there was ever a connector in that spot.  So, only 6 out of the 7 connectors are used. 
Is this normal?
24  Camaro Research Group Discussion / Restoration / Re: '68 window fuzzies - ordered Steele.....got Repops on: July 26, 2013, 11:33:14 AM
Does anyone know where to order the PUI from?
Per the PUI web site, the coupe outer kit w/ reveal moldings is p/n 0236-10.
You can also find them on e-pay:
http://www.ebay.com/itm/68-Camaro-Outer-Window-Felt-Fuzzies-WindowFelt-OE-Style-Hardtop-Kit-STD-W-Mldg-/251219775140?pt=Motors_Car_Truck_Parts_Accessories&hash=item3a7ddd8ea4&vxp=mtr
25  Camaro Research Group Discussion / Maintenance / Re: Vacuum advance on: July 26, 2013, 07:37:25 AM
What vacuum advance are you looking for?  NAPA should have a good selection available.
26  Camaro Research Group Discussion / Restoration / Re: '68 window fuzzies - ordered Steele.....got Repops on: July 22, 2013, 08:41:10 AM
I can't comment about ordering Steele and getting RePops.  I bought a set of RePops ages ago for my convertible with reveal moldings and noted the same issues.  Also, the RePops are way too think.  I threw them in the trash (since it was too late to return them).

IMO, your best bet is to order the PUI fuzzies.  They are very close to the originals.
27  Camaro Research Group Discussion / Originality / Re: 68 SS RS Wheel well moldings on: July 15, 2013, 07:54:54 AM
For 68, the front moldings differed between Z21 Style Trim Group & RS.  The rear moldings were the same for both.
Here is additional info on the 68 moldings:
http://www.gmpartswiki.com/getpage?pageid=64641
http://www.gmpartswiki.com/getpage?pageid=64643
28  Camaro Research Group Discussion / Restoration / Re: '68 wheel rear wheel opening molding correctness. on: July 10, 2013, 09:24:42 AM
I bought mine from Heartbeat City and he lists 1967-68 mouldings and 68 Rs mouldings separately.
Almost all vendors list them the same way, and I don't know why. 
I actually like the look of the longer moldings on the rear, but I installed the correct shorter ones on my car (luckily I bought a nice set of NOS ones ages ago when prices were reasonable).
29  Camaro Research Group Discussion / Restoration / Re: '68 Standard gas cap fitment problems on: July 10, 2013, 09:18:24 AM
I agree that the cap contour doesn't match the tail panel, but you're planning on getting the cap centered in the opening, correct?
30  Camaro Research Group Discussion / Restoration / Re: '68 wheel rear wheel opening molding correctness. on: July 09, 2013, 02:06:12 PM
They had two different wheel well moldings for 1968.Non RS 68 moldings shared the same ones as the 1967 Camaro.68 RS Camaros had the molding stop at the rocker crease.    
Can anyone actually confirm this?
I have looked through all the original parts listings on gmpartswiki.com, and the longer 4229493 & 4229494 rear moldings are listed as applicable only to the 67 Camaro.  The shorter 7795063 & 7795064 moldings are shown as applicable to all 68 Camaros.  I have original pictures of my 68 non-RS car that show the shorter moldings.

Here is an example from the GM books:

1967 Only:
http://www.gmpartswiki.com/getpage?pageid=64638
http://www.gmpartswiki.com/getpage?pageid=64639

1968 Only:
http://www.gmpartswiki.com/getpage?pageid=64641
http://www.gmpartswiki.com/getpage?pageid=64643
Pages: 1 [2] 3 4 ... 24
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 0.08 seconds with 18 queries.