Gramma's Car: the new project!

[earntaz]

Sure is pretty Eric ...

[SuperNovaSS]

No problem with the cc difference. Just bore one size .030 an the other side .060.


Jason

[njsteve]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: SuperNovaSS</div><div class="ubbcode-body">No problem with the cc difference. Just bore one size .030 an the other side .060.


Jason </div></div>

That would go great with a swapped main cap or two! [img]<<GRAEMLIN_URL>>/grin.gif[/img]

[njsteve]

I was getting an old pair of lifters ready to use for degreeing the cam: popping the clip and taking out the internal spring and replacing it with a solid washer, Of course I proceeded to slip with the screw driver and jam it halfway through my finger. OUCH!

It seems that the mechanical dieties always require some type of blood scarifice for every engine I have ever assembled. This one was no different. I proceeded to bleed all over the short block looking for a rag to wrap my finger with...

The worst one was the time I tried to install an oil pick up into a smallblock Chevy oil pump. I slipped the open end wrench over the pick up flange and took aim with a 32 oz. ball pean hammer. I swung. Perfect on-target hit - right onto my thumb nail. [img]<<GRAEMLIN_URL>>/eek.gif[/img]

[70 Forest Green Zee]

Eric.....you are truly a craftsman in every sense of the word! Outstanding job!!

[cook_dw]

I would really like to pick your brain on how your process of finishing the carb body.. [img]<<GRAEMLIN_URL>>/grin.gif[/img]

Nice work.. Not many realize the excellence of your plating abilities..

[njsteve]

Here's a question for you camshaft gurus out there:

We started the process of degreeing the camshaft and have come up with some numbers that don't seem to match the tech card on the Summit 2802.




Intake cam timing @.050 is supposed to open at 3 BTDC with intake centerline of 109 degrees

What we got @.050 was: intake opens at 1 degree BTDC with intake centerline of 110.5 degrees.






Exhaust cam timing @.050 is supposed to open at 56 degrees BBDC with exhaust centerline of 119 degrees

What we got @.050 was: exhaust opens at 54.5 degrees BBDC with exhaust centerline of 116 degrees

These results were the average of 3 tests.= for each set. I used two solid lifters.

So I tried using the three position crank sprocket at the advanced position (it has a &quot;+4&quot; stamped there) and it moved the intake opening to 9 degrees BTDC from 1 degree. Now, instead of being 2 degrees retarded from the 3 degree spec, it is now 8 degrees from its original position (or 6 degrees advanced from the 3 degree BTDC spec).

So I assume that is way too far in the other direction for an adjustment. I guess I have to buy another double roller set with a 9 position keyway and try to adjust from there. Cloyes makes a nice one that is around $95 from Summit.

I am not a math whiz so I am guessing that a 4 degree crank sprocket advance position actually moves the cam 8 degrees due to the fact that the crankshaft rotates twice for every single rotation of the cam?

What about an offset cam sprocket woodruff key? The smallest increment they sell is 2 degrees (Mr. Gasket). Here is my question: will a 2 degree cam key move my final dial reading two degrees to the preferred 3 degree spec or will it add 4 and make it 5 degrees total?

Help me Obewan Kenobee, You're my only hope...

[VintageMusclecar]

Welcome to the wonderful world of mass produced parts. [img]<<GRAEMLIN_URL>>/frown.gif[/img]

Just outt'a curiosity, what brand is your existing timing set?

Assuming your 1st attempt was straight up?--of so, I'd save yourself a lot of unnecessary aggravation and install it there. It's basically within 2° of spec. With the 3.42 screw in the back, running the cam a couple degrees late won't hurt a thing, plus it'll help ward off spark rattle.

[cook_dw]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: VintageMusclecar</div><div class="ubbcode-body">Welcome to the wonderful world of mass produced parts. [img]<<GRAEMLIN_URL>>/frown.gif[/img]

Just outt'a curiosity, what brand is your existing timing set?

Assuming your 1st attempt was straight up?--of so, I'd save yourself a lot of unnecessary aggravation and install it there. It's basically within 2° of spec. With the 3.42 screw in the back, running the cam a couple degrees late won't hurt a thing, plus it'll help ward off spark rattle. </div></div>


I agree.

[njsteve]

I installed a &quot;2 degree&quot; Mr Gasket offset cam key... Now it is reading 5 degrees BTDC. So that answers my question as to whether you double the advertised degree of the cam offset key or crank sprocket keyway. Either way, the end result is doubled.

Grrrrr. [img]<<GRAEMLIN_URL>>/mad.gif[/img]