Original stock engine question

[bcsilverado]

In the original stock engine before being blueprinted, we're the cams no compression?

 

[flattop1]

Yes no compression release .
From 2005 at least.

 

[scooter_trasher]

Is that non pull start models ? does the newer pvl ignition have an electronic spark advance ? Because with 28* static ignition timing without a compression release to keep from making combustion before 5* someone using a pull starter will likely have their arm ripped off at the shoulder.

 

[flattop1]

Yes , you had too use the electric starter . The Lo206 is really the only one where pull start was common.

 

[scooter_trasher]

Yes , you had too use the electric starter . The Lo206 is really the only one where pull start was common.

Thanks, I take it the new PVL ignition doesn't have electronic spark advance either.

 

[Chipg56]

Thanks, I take it the new PVL ignition doesn't have electronic spark advance either.

It does have an intentional spark advance for easier starting. It is irrelevent for on track performance. Embarrassingly, I do not recall how much it advances or at what RPM. I am sure someone will remember the details.

 

[flattop1]

^^^ correct the pvl has always had digital advance /timing .

 

[steve baker]

The PVL ignition( black, red, blue color coils ) advances from 10 degrees to 29 degrees at 850 RPM.
The green LO206 coil advances from 10 degrees to 29 degrees at 1350 RPM.

 

[scooter_trasher]

So they finally came up with a spark advance to prevent kick back, that's a good thing, a hundred years late , but still a good thing.

 

[CarlsonMotorsports]

So they finally came up with a spark advance to prevent kick back, that's a good thing, a hundred years late , but still a good thing.

Just another advantage of going to a digital coil.
As a race engine builder, it's nice to not have to put so much ignition advance on the bench and watch it fall off as rpm increased as per the old coils.

-----
Thanks and God bless,
Brian Carlson
Carlson Racing Engines
Vector Cutz
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34 years of service to the karting industry ~ 1Cor 9:24
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