ruddyboys
Jun 20 2005, 12:27 PM
Reading an article on the bird board it says timing for a carbed engine should be 34 degrees @ 3200RPM? Is this right or should I stay with 27 degrees @3500RPM.
ArtechnikA
Jun 20 2005, 12:36 PM
"a" carbed engine ?
what *kind* of carbed engine?
i know of some for which that'd be too much, others for which it'd be too little.
cam? compression? octane rating?
tat2dphreak
Jun 20 2005, 12:41 PM
I *THINK* 34 is optimum, BUT IIRC, there is no way to acheive this without a Mallory dizzy, I think the 009 tops out at 28(or so) and the 050 stops at like 31...
my numbers may be a bit off, but you see the problem.
Mueller
Jun 20 2005, 12:50 PM
QUOTE (tat2dphreak @ Jun 20 2005, 11:41 AM) |
I *THINK* 34 is optimum, BUT IIRC, there is no way to acheive this without a Mallory dizzy, I think the 009 tops out at 28(or so) and the 050 stops at like 31...
my numbers may be a bit off, but you see the problem. |
huh???? a dizzy tops out at whatever spec you want it to depending on the base numbers...try it at 27° first, then move it up until you loose power or start to ping/heat up.
you can run 50° advance with a stock dizzy if you want, but it'll be hard to start the car
tat2dphreak
Jun 20 2005, 01:20 PM
QUOTE (Mueller @ Jun 20 2005, 01:50 PM) |
QUOTE (tat2dphreak @ Jun 20 2005, 11:41 AM) | I *THINK* 34 is optimum, BUT IIRC, there is no way to acheive this without a Mallory dizzy, I think the 009 tops out at 28(or so) and the 050 stops at like 31...
my numbers may be a bit off, but you see the problem. |
huh???? a dizzy tops out at whatever spec you want it to depending on the base numbers...try it at 27° first, then move it up until you loose power or start to ping/heat up.
you can run 50° advance with a stock dizzy if you want, but it'll be hard to start the car |
maybe I misunderstood, but Jake was saying that peak advance on a 009 and 050 are quite lower than the advnce curve needed for carbs
I dunno... maybe the Jake will see this and rescue me on this one... and clarify?
Mueller
Jun 20 2005, 01:28 PM
you are correct in the "advance curve" might be less...
see these 2 examples:
if you set the dizzy to have 10° at idle and it swings 17° you have a total of 27°
now if you set it at 17° idle, you could get a max advance of 34°...the car will be harder to start at 17° static timing
tat2dphreak
Jun 20 2005, 01:40 PM
QUOTE (Mueller @ Jun 20 2005, 02:28 PM) |
you are correct in the "advance curve" might be less...
see these 2 examples:
if you set the dizzy to have 10° at idle and it swings 17° you have a total of 27°
now if you set it at 17° idle, you could get a max advance of 34°...the car will be harder to start at 17° static timing |
ok, I see, you were talking static timing and I was saying total advance...
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