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Messages - R68GTO

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46
Maintenance / Re: At a loss - engine stalls under load
« on: November 04, 2022, 11:18:21 PM »
One more update....periodic stalling problem under moderate to heavy load continued.  Took it to a chassis dyno so we could troubleshoot under load.  Dyno guy has been tuning engines and using a dyno for over 20 years - after 3 hours he's scratching his head.  Because the stalling was so immediate (like turning the key off), he decided to temporarily install an MSD distributor and MSD box to effectively bypassed my entire ignition system.  Viola!  problem disappeared.  Made another jet adjustment and some other tweaks and the car has "woken up" pulling well to 5,500 rpm.
So the problem is on the inbound side of my coil.  Ultimately found a melted wire that goes to the positive side of the coil.  I'm not sure I understand why that condition caused the symptoms to be what they were as a melted wire is melted at both low and heavy throttle.  What I do know is when we took it out of the circuit, the problem went with it!

47
General Discussion / Re: Speedometer Cable Codes
« on: September 06, 2022, 10:41:24 PM »
Build Date: 9/26/69
Plant: Norwood
Stamp: CW
Grommet: ?
Engine: L72
Trans: M22
Gears: 4.10 posi BE

48
General Discussion / Re: 1969 camaro inner drivers door decal placement
« on: September 02, 2022, 12:24:49 PM »
White background - I took this pic when I just had both labels stuck to the door with masking tape to make it easier to compare to photos I had taken of some survivor cars with labels intact.  The label backing had not yet been removed.

49
General Discussion / Re: 1969 camaro inner drivers door decal placement
« on: September 01, 2022, 09:19:47 PM »
Here's how I located mine - late September car.  I used the ECS VIN sticker

50
Originality / Re: Sheet metal stampings
« on: August 29, 2022, 12:01:27 AM »
Date stamp on quarter panels can be seen with trunk lid open.  They are located in the upper radiuses corner of the water channels on each side.

51
General Discussion / Re: Looking for opinions on a survivor car
« on: August 20, 2022, 10:40:41 AM »
I would repaint the engine the correct color and "age it" by employing various methods.  For methods on aging, go to some of the forums where guys build replicas of old board track racer motorcycles, they have lots of interesting techniques to recreate "patina".  Clay bar might remove the overspray from stickers.

52
Maintenance / Re: At a loss - engine stalls under load
« on: July 26, 2022, 11:37:55 PM »
Got the carb re-installed and it is 100% better so I guess I can confirm that I "jacked it up" somewhere along the line.

53
Maintenance / Re: At a loss - engine stalls under load
« on: July 19, 2022, 02:17:45 AM »
Update....I sent the carb to Eric who found a few minor issues plus found the rear float was set near the bottom of the bowl.  He said that would definitely cause my stalling at heavy throttle.  At one point I had checked the float level in both bowls and set them to the bottom of the sight screw hole but obviously jacked something up.  I won't have the carb back in time for the SuperCar reunion but think I have it running good enough to do a few smoky burnouts and take a couple of easy passes with it.  It's been roughly 50 years since this car made its debut on the strip as Rat's Nest 8)

54
General Discussion / Re: Camaro Nationals
« on: July 19, 2022, 02:10:09 AM »
It was a great show and venue.  It was great to see guys I knew plus got to meet some new Camaro enthusiasts.  Lots of great stories, info, fellowship going around!

Jim

55
Maintenance / Re: At a loss - engine stalls under load
« on: July 13, 2022, 12:36:43 AM »
primaries are bone dry at idle.  With old carb that Eric worked on, I had 14.5" vacuum.  New carb is 5 inches of vacuum.  I haven't reached out to Eric yet but probably will once I get done with Camaro Nationals and Supercar reunion.
KK, I'll double-check on the unused port thing in the morning.

56
Maintenance / Re: At a loss - engine stalls under load
« on: July 12, 2022, 05:27:29 PM »
Need some help understanding the question…..fuel spraying out at normal idle looking down into the primaries?

57
Maintenance / Re: At a loss - engine stalls under load
« on: July 12, 2022, 01:57:01 AM »
Did more testing tonight.  Set initial timing at 4 degrees BTDC, adjusted idle mixture screws (2 turns out) and set the idle at 1000 rpm.  Seems to run pretty good with no cutout or stalling under hard acceleration.  But just have 5 inches of vacuum?  What about a carb change takes me from 14.5 inches of vacuum to 5?  Nothing I tried seemed to bring the vacuum up other than rpm.  pulled about 12 inches at 2,000 rpm

58
General Discussion / Re: Camaro Nationals
« on: July 12, 2022, 01:50:12 AM »
I'll be there with Rats Nest, please stop by and say hi.

59
Maintenance / Re: At a loss - engine stalls under load
« on: July 11, 2022, 09:33:27 AM »
Carb is essentially the same, just a newer version

60
Maintenance / Re: At a loss - engine stalls under load
« on: July 10, 2022, 06:53:07 PM »
Update....borrowed a carb from my brother and swapped it onto the car.  Good news......stall condition under load is gone.  Bad news, I have almost no vacuum (5 inches) and the engine has a slight miss in it.  I adjusted the idle mixture to try to bring the vacuum up with no luck. 
One of the other things I noticed is that the new carb puts my car in fast idle when cold, my old carb never did that.  Could that be an indicator of the cause of my past problem?
Going to go back through my wires and plugs, adjust timing, etc. to see if I can find the source of the miss. Feel like I'm headed in the right direction, just not there yet.
Thanks again for all the ideas!
Jim

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