Gramma's Car: the new project!

[Ryan1969Chevelle]

This is the first time I have see the value of degreeing a cam during installation.

Bummer that the part is not right on specs, but so important to know now!!

Ryan

[njsteve]

Same here. All these decades I always just threw the cam in and assumed it would be right. Rather enlightening to see what I have been missing all these years.

Next episode: What actually goes into the hotdogs you eat. Stay tuned! If you dare! [img]<<GRAEMLIN_URL>>/naughty.gif[/img]

[njsteve]

I just installed an old double roller setup from a prior engine and it came back with 1 degree BTDC when installed straight up. So it looks like it is the cam that might be slightly off since I got the exact same result with another timing set.

[njsteve]

I spoke with the tech people at Cloyes and the 9-3512X9 timing set I ordered from Summit will hopefully do the trick. The nine-position gear has a &quot;+2&quot; positon that is 1/4 the distance from 0 that the &quot;+4&quot; position is on my old gear.

On the Cloyes gear, that &quot;+4&quot; position that is on my old gear is actually stamped as &quot;+8&quot;. He indicated that is how their gears are stamped: with the actual correction factor, so the final result will be two degrees not four.





Fingers crossed...waiting on the UPS guy now.

[njsteve]

Well, here's today's lesson in &quot;You Get What You Pay For&quot;.

The Cloyes true roller set arrived today. Slipped it on in the &quot;+2&quot; position and voila! Perfect 3 degrees BTDC and 109 degrees intake centerline to match the cam card. I was all giddy - I just kept repeating the calculations and spinning the engine and doing it again and again just to make sure I was not hallucinating. I guess there's a reason they charge $100 for the timing set!

Now we can finally get to buttoning up this monstrosity.