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Old 06-20-2013, 08:37 PM
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New timing problem

Started a new thread cause it seems like a new issue...

Replaced to gear drive on my vortec headed 383 tonight, it had erratic timing previously, was bouncing around everywhere. Now its running, and with the vacuum advance unplugged its showing 36* at 850-900 rpm, if u touch the throttle it jumps fast, and by 2500 rpm its almost pegging the timing light. This makes zero sense, its starts hot with no slow roll, it doesn't run on or anything, its not pinging (now that the gear drive is gone u can actually hear things). It does respond to turning the dist, but I'm as far retarted as I can go due to firewall interference. But before I go pulling the dist I wanna make sure I'm not missing something.
383 with vortec heads
Performer rpm cam, 234/244 @ .050
Msd HEI with external blaster 2 coil
Msd 6A
Taylor wires
Msd mini starter.
I know the msd box can mess with a dial back light, but this reads constant and doesn't jump or anything weird. And its the same light I have used forever.
Could the 6a be simply making it read high?

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Old 06-20-2013, 08:47 PM
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It's not pinging or detonating while free revving, how about when under load? That's a ton timing.
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Old 06-20-2013, 08:53 PM
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Quote:
Originally Posted by 68NovaSS View Post
It's not pinging or detonating while free revving, how about when under load? That's a ton timing.
Well that's Kinda what i thought. I haven't driven it yet, it had a flat and its late....bringing the tire to the shop to fix tommorow. But i don't know if I would have heard it with the stupid gear drive. He was driving it like this previously, but only about 2000miles. And I would have guessed with that much timing it would ne impossible to start or it would run on on other odd things.
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Old 06-21-2013, 01:44 AM
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It may all be exactly as you're seeing it, but make sure that TDC as seen on the damper/timing tab is correct. Be sure you're timing off #1 (or #6).

Determining TDC
Distributor installation
Differences in SBC timing tabs and damper TDC lines
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Old 06-21-2013, 04:34 AM
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Originally Posted by cobalt327 View Post
It may all be exactly as you're seeing it, but make sure that TDC as seen on the damper/timing tab is correct. Be sure you're timing off #1 (or #6).

Determining TDC
Distributor installation
Differences in SBC timing tabs and damper TDC lines
It is yah, I was TDC, dot to dot on my cam/crank, balancer and timing tab matched up. I spoke to the PO this morn, he says it was set up on a dist machine and was 16* initial and 34* total all in by 2500.
Now this is going to sound dumb, but if he used#6 when he dropped in the dist and I'm checking it off #1 what's that going to look like?
I have a Snap On light at work that says its good with multi discharge boxes so i will bring it home and try that tonight as well.
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Old 06-21-2013, 07:31 PM
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Quote:
Originally Posted by bygddy View Post
It is yah, I was TDC, dot to dot on my cam/crank, balancer and timing tab matched up. I spoke to the PO this morn, he says it was set up on a dist machine and was 16* initial and 34* total all in by 2500.
Now this is going to sound dumb, but if he used#6 when he dropped in the dist and I'm checking it off #1 what's that going to look like?
I have a Snap On light at work that says its good with multi discharge boxes so i will bring it home and try that tonight as well.
#1 and #6 come up to TDC simultaneously (one on compression, one on exhaust), so the timing light doesn't care which you use.
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Old 06-21-2013, 11:12 PM
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Quote:
Originally Posted by cobalt327 View Post
#1 and #6 come up to TDC simultaneously (one on compression, one on exhaust), so the timing light doesn't care which you use.
Grabbed a new gun tonight, all good, 24 initial, 36 total. Runs good, seems to be using some oil under hard accel, not sure what that's about yet, whether its a real issue or not. Had someone behind me while we were out and he said under hard accel he could see blue smoke, and on decel the same. But only after a hard run. The motor has about 1800k on it, so what, maybe 1000 miles. I would assume the rings have seated by now....? Will check pcv valve tommorow, I know its baffled, and run into the top of the intake right behind the Carb pad. The motor sat almost untouched for the last 2 years so who knows. Any suggestions?
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Old 06-23-2013, 02:27 AM
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The PCV should not be connected to the top of the intake manifold.
This is the wrong spot. Connect to the base of the carb.
Connecting it to the vac port on the top of the #8 runner will result in #8 running lean.
The vac port on top of #8 is for the power brakes and auto trans vac modulator.
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Old 06-23-2013, 08:19 AM
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Quote:
Originally Posted by F-BIRD'88 View Post
The PCV should not be connected to the top of the intake manifold.
This is the wrong spot. Connect to the base of the carb.
Connecting it to the vac port on the top of the #8 runner will result in #8 running lean.
The vac port on top of #8 is for the power brakes and auto trans vac modulator.
I actually moved it yesterday after I read an old post from you saying the same thing.
Just swapped the brake and pcv. Now just trying to nail down my oil burning issue.
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