Mopars, Drag Racing, Engine Building, etc…
Archive for January, 2010
Trike Race
Jan 31st
You’ll probably enjoy this video I made of the kids today. I was trying to teach them how to control their trikes around corners so that they maintain speed and not spin out. Xavier got the concept and could do it quite easily. Zander got plenty frustrated! 
Main Caps and Bearings
Jan 31st
Ok I got the motor back apart. I checked the bearings. 2 of them have scuffing in a spot. Both are lower bearings. All upper bearings are fine. #4 lower bearing is scuffed on the drivers side. #3 lower bearing (this is the one with the thrust bearing) is scuffed a little bit on the passenger side. Of the two, the #4 bearing has the bigger scuff.
Some pictures – you can really see the #4 bearing scuff. The #3 bearing scuff is harder to see (in the 2nd picture it is about where that blob of bearing guard is, left side). The rear main looks like it has a scuff but it is not – it is just a black mark from the factory.
#4 main scuff is obvious to see…
#3 main scuff is harder to see (easier to see with naked eye – camera just couldnt take a good picture of it). Black “scuff” on rear one is not a scuff.
Final Piston to Deck Measurements
Jan 30th
Today I took the time to make really precise measurements of the piston to deck distances for all four corners of the block. Piston in cylinder 1 is .009 down the hole, .011 for cylinder 7, .007 for cylinder 2, and .011 for cylinder 8.
I also put one head on the block and took some pictures.
Measuring Piston to Deck Distance
Jan 27th
Today I took apart a rod, put the piston and wrist pin on it, put the upper rod bearing on, and put bearing guard on that bearing. Then I put that rod / piston assembly in each of the four corners of the block and measured the piston to deck distances. I think I will redo this step tomorrow just to double check all the measurements and make sure they all came out right.
Loaded Crankshaft
Jan 26th
I put the stroker crankshaft into the motor. First I cleaned all the mains and bearings, put the upper bearings on, and put bearing guard on the bearings. Then I cleaned the crankshaft journals and put the crankshaft in. Then I cleaned the main caps, and put the lower bearings into them. Then I put the caps on with studs and very snugly tightened everything up.
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