Team Camaro Tech banner

1 - 9 of 9 Posts

·
Registered
Joined
·
152 Posts
Discussion Starter #1
I don't have a service manual yet. Can someone tell me what the correct engine timing spec is for a stock 350/295HP '67 SS motor? Also, which plug is the number one?

Thanks,
Steve
 

·
Registered
Joined
·
891 Posts
i believe it was 6* btdc but you should be able to run 8*.
#1 plug is the passenger side closest to the front of the car.
set timing with engine warmed up,at idle(about 650rpm)in park or neutral.parking brake set.plug the vacuum advance line at the distributor end.
BE CAREFUL!i had a friend severly lacerate his elbow on an aluminum flex fan!
remove jewelry,roll up long sleeves,and tie your hair back if it's long!
loosen the distributor hold down bolt or nut until the distributor turns with a bit of effort(not loose or it will spin on you before you can re-tighten it).
set timing and re tighten distributor(not too tight or you can bend the distributor shaft).
re-check timing.
since your car is stock you might want to pick up a distributor wrench from the local auto parts store,it will make things a bit easier.
that should do it!
Eric B
 

·
Banned
Joined
·
21,341 Posts
He, He!!

Turn her up until she try's ta kick back the starter AND then turn her back a schosh works fine!!

pdq67
 

·
Registered
Joined
·
308 Posts
I am having the same problem at this point. Where should I set the timing at idle? Should it be at 0 (the groove in my balancer) or should it be at 34*? Someone told me to plug the vacuum advance off then rev engine to 3000 rpm's and set timing to the 34* mark. I have done this, but then the car will not idle and it runs rough? I rev it higher than 3000 and it spits and sputters and cracks? It doesnt seem to have alot of power. I am a novice when it comes to engine timing and need some help. This is a new 350 HO crate engine. I just had to get a new distributor because of clearance issues with the firewall. Since I put this new distributor in I lost the old timing mark and had to start from scratch and I dont think I have something right. I do have the wires correct (check that a hundred times) This is getting very frustrating and I can't wait to try this engine out. Could I have the valves tighten too much?
 

·
Premium Member
Joined
·
22,122 Posts
pdq67 said:
He, He!!

Turn her up until she try's ta kick back the starter AND then turn her back a schosh works fine!!

pdq67
A time tested and VERY effective way to set the timing... seriously.

I generally leave the timing light in the tool box until I'm ready to get serious. Yes, it's important not to have too much total timing, very important. In a perfect world, that would be changed inside the distributor, not by backing down the initial until the motor would barely run. I have no idea why the factory sets the timing so conservatitively, perhaps JohnZ or someone might clue me in?

Seems my engines always like a lot of initial timing. If it don't wanna crank over hot, that's too much. If it pings at part throttle, that's too much to, but that can be worked out be changing the mechanical and vacaum advance curves. My current 327 wants 18 degrees initial, plus another 18 from the vac can on full not ported, for a total of 36 degrees at idle!
 

·
Registered
Joined
·
152 Posts
Discussion Starter #7
How many degrees does each notch on the timing scale represent? I think 2 degrees per notch from TDC? I timed my stock SS 350 and it's at the fourth notch before TDC. So must be 8 degrees BTDC. That's at idle without plugging the vacuum hose at the distributor. What would the timing be with the vacuum hose plugged?

Steve
 

·
Registered
Joined
·
891 Posts
good catch joe!guess i was thinking about a 6 cylinder.
Eric B
 

·
Premium Member
Joined
·
22,122 Posts
SFCamaro said:
How many degrees does each notch on the timing scale represent? I think 2 degrees per notch from TDC? I timed my stock SS 350 and it's at the fourth notch before TDC. So must be 8 degrees BTDC. That's at idle without plugging the vacuum hose at the distributor. What would the timing be with the vacuum hose plugged?

Steve
8 would be right, each notch is 2. you should only set the initial with the vac hose removed and plugged tho.

If the vac advance is on ported vacaum, it should have little or no effect on the timing at idle, but if it's on full it will ad a bunch of advance at idle. Easiest way to tell is start the motor, pull the hose off the dist, and put your finger on the end of the hose. If it's sucking hard, it's on full.
 
1 - 9 of 9 Posts
Top