The cam specs aren't the same as the one Sean had long time ago...TA changed the grind. What we have is: Lift X 1.6. Intake: 0.584". Exhaust: 0.572" Duration: 282. 292 Open: 31*. 76* Close: 71*. 36*
We are going down on Friday to pick up the balancer, and new header gaskets. I'm gonna call the shop today and see if the bearings showed up, or just where they are at with this thing. I think the only other "parts" required are the pushrods now....NICE! I'm off for three weeks now, so hope to make some headway with this build, and see what's up with the engine in my truck....hopefully just a broken rocker arm.
Bummer......they haven't touched it since we brought them the second crank. Picked up the new balancer though.....VERY NICE! I'll grab a picture of it later this morning....heavy little bastard.
All pistons are now 0.013" to 0.014" in the hole. Yeaaa! So we pick everything up to take home to test fit everything before they balance the rotating assembly.... Bring it home, set it up on the engine stand, slide the cam in....install the timing chain at what we think is +2 degrees advanced...just to get it in as a starting point... Install piston & rods for cylinder #1 & 2. Try to roll it over, aaaaaaaand.....clunk. Houston, we have contact.
Tell me this is NOT +2 degrees advanced...that way there's a chance we did something wrong, and the cam clearance will change to allow no contact when we spin the engine over.
Ivan, Check crank to cam lobe clearance in front. Mine was very close(.005) and needed .020 off crank. Did you have align hone? Brings cam closer to crank. Rollers are big cams.
Will do. Yes, align hone was done, but from what they said, it was perfect. Apparently this isn't that big of a cam according to the shop that is doing most of the work.
Check your rod to cam clearance as well to make sure its not one of those huge cam lobes hitting rod.(huge for a sbb that is) Grinding corner off of rod is not a big deal if clearance needed there. Eagle sells sbc rods that are clearanced so much they're cut into the bolt for the 4" stroke sbc cranks so the rod clears a small base circle cam! Yours should only need a tiny bit probably not even to the bolt if that's even where its hitting. Derek
It's not the crank hitting...it's the rod. I pulled out piston/Rod #2, and it still hits on #1 rod. I'll pull number one out as well, and make sure the crank clears.
Ok, nothing but crank and cam installed. Got AT LEAST 0.030" clearance on all counter weights to cam lobes for clearance. (Used feeler gauge with 0.020" & 0.010" feelers stacked...and still had a bit of room yet.
Are you saying with just the crank and cam in with the timing chain connected that the engine still doesn't spin? If so, it could be that your thrust bearing is binding it up, take that one out and try again. Derek
Negative. With just the crank and cam, assembly spins freely, and all counterweights of the crank has at least 0.030" clearance on all lobes that could be affected. I pulled the piston off of the rod, and inserted the rod by itself....and took a picture.....lemme get it.... Here is the problem on the rod clearances. (I'm assuming they will all have to be ground...a lot!)
