3 Degrees in the right direction?

[Air Gramps]

I heard for a while, advance the timing 3 degrees.

Does this sound right and advanced by rotating the pickup CCW.

I have a cut head.
Mild Exhaust porting on 62T jugs, with the intake opened and the sleave cut back in the intake side at the cases..
Pistons 82.5mm
Riva red pipe.
Carbs jetted w/130H and 120 lows.

 

[Matt_E]

Yes, advance is to the right....you'll notice that one mark is further away from the two others. The center mark is TDC, and the further one is BTDC

 

[Air Gramps]

Yes, advance is to the right....

Just checking... You mean "Advance to the right on the underside" = CCW cause I rotated it to the left.

Thanks.

Do you know the jug to case bolt torque specs too?

 

[waxhead]

in my op you are asking to blow your engine up
the riva red has a smal stinger and already runs the back of the pistons hot and now you are throwing more timing at it
not a good thing in my mind

 

[orange flattop freestyler]

Agree with Wax here dude,

Advancing static timing on an engine not setup for it is bad news IMO.

It will end in tears........ trust

 

[Air Gramps]

do i want any advance? 1 or 2 degrees?

 

[waxhead]

i wouldnt
some people say ok
if you are not planing on holding your engine flat out then maybe it will be ok

 

[orange flattop freestyler]

I personally wouldnt at all to be honest.

If you really want to advance id use an aftermarket progamable ignition, like the wax racing one for example.

These are digital and can dail in heaps of advance where you want it but then retard the timing up the rev range to reduce/ eliminate any det.

This will provide you with a much bigger gain than what you were planning to do and will be safe at the same time.

 

[waxhead]

i agree a ignition unit where you can retard the timing up top and set it up for your own boat is by far a much better way of making your ski have the best of both worlds

 

[Air Gramps]

Thanks...

I knew I couldn't run wide open, only 1-2 second shots. Trying to make it for the surf and the hole shot.

I was hoping to get by on a budget and didn't want to get the programable ignition yet.... This engine job started as a simple hull painting, but when I pulled the motor, found the piston took a hit. It has couched up a few more $'s then expected. :17:

 

[orange flattop freestyler]

^^^^

Dont think you'd enjoy spending even more cash fixing it again by taking the "budget" route.

 

[LBE]

Thanks...

I knew I couldn't run wide open, only 1-2 second shots. Trying to make it for the surf and the hole shot.

I was hoping to get by on a budget and didn't want to get the programable ignition yet.... This engine job started as a simple hull painting, but when I pulled the motor, found the piston took a hit. It has couched up a few more $'s then expected. :17:

Sounds terribly familliar.
Just FYI: 1mm=1 degree of timing.

 

[Yamah0]

Where does one buy a degree wheel?

 

[waxhead]

http://www.tavia.com/free_degree_wheel.html

print this put carboard on the back and your done

 

[Yamah0]

Brilliant... now all i need is to know how to use it correctly to set my timing.. anyone?

 

[waxhead]

align the marks on the cases and leave it at that
you will be fine

 

[orange flattop freestyler]

Buy a proper ignition!!!!!!!




or advance it and get your credit card out for when your pistons look like they've been shot blasted :biggrin:

 

[freestylegeek]

I've been running 3 degrees advance on all my motors (ported stock cylinder w/ domed pistons, and flat-top Lamey) and I've seen no signs of detonation. I usually do top-ends around 40 hours. I had a red RIVA pipe for one season when I first started, but have been running a 'b' pipe for the rest of the time.
My ignition is a modified (no rev limiter) 62T CDI, and I'm running a 61x stator and flywheel.
After looking at the MSD enhancer vs Stock timing curves, the advance would only effect it way up high.

Any thoughts fellas?

 

[Yamah0]

align the marks on the cases and leave it at that
you will be fine

Thanx Waxhead.

So i should be fine without using the degree wheel and just align the two marks?

Zane...

 

[waxhead]

yes that will work well