carb timing Options

[ruddyboys]

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]

"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]

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]

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 (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)

[tat2dphreak]

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 (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif)

(IMG:http://www.914world.com/bbs2/html/emoticons/huh.gif) 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 (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif)

I dunno... maybe the Jake will see this and rescue me on this one... and clarify?

[Mueller]

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]

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...