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'72 K5 - AJ's Gray Matter Build

5/13/16 - Building a big block - Friday the 13th...and I spent it at the shop with a couple of friends. We had two engine builds going. Not sure why one guy likes to wear crocs at the shop. :dunno:

Made some good progress, at least I think so.

Cam bearings installed and cam in place. Cam slid in like the block was a cheap hooker.
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Main bearings and crank dropped in. Studly
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Cap bearings, main caps. and timing chain.
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Then the torquing fun commenced. 110 ft/lbs in 10 pound increments. I was beat by the last one. But the crank turns smoooooth.
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Plan today is to wrap up the rotating assembly. More to come.
 
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Building a motor on Friday the 13th..... Bold move! :)


-G
 
I think the dyno sim is wrong.
No way that engine is less then 600hp.
Interested to see how the heads do.
I think they might be a limiting factor here.
 
I think the dyno sim is wrong.
No way that engine is less then 600hp.
Interested to see how the heads do.
I think they might be a limiting factor here.

Hard to say. It's pretty close to dang 600hp. I take it you approve of cam choice?

Heads are big oval. Intake valves are 2.25", exhaust 1.88". Shouldn't have much trouble breathing. It is going to be pushing the limits of my FAST EZ EFI though.
 
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Saturday the 14th. Anybody remember that spoof? For me, it was piston and rod assembly day.

Got it all laid out and cleaned. Shiny
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Piston and rods assembled and rings laid out. The circle clips were a pain in the a$$. I'm told I lucked out that they weren't spiral locks. :dunno:
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Rings in, but didn't get a pic with the bearings
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Called it a night here. Buddy left his ring compressor at home. :doah:
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Yes, I like the cam choice. I think your fast should be fine, but you might think about an upgrade there.

You going to invest in dyno time?
I would recommend it.
I am interested in your setup compared to mine.
 
Yes, I like the cam choice. I think your fast should be fine, but you might think about an upgrade there.

You going to invest in dyno time?
I would recommend it.
I am interested in your setup compared to mine.

I think so. It'd really be just for AFRs and timing.
 
Double check valves.

Really no reason to spend that kind of dough to build that beast and then cheap out on 5 bills for legit numbers. Plus optimize your air/fuel/timing.

I dyno'ed my 406 once finished and found made the most power at 38degrees. I would have never put that much into myself....
 
Double check valves.

Really no reason to spend that kind of dough to build that beast and then cheap out on 5 bills for legit numbers. Plus optimize your air/fuel/timing.

I dyno'ed my 406 once finished and found made the most power at 38degrees. I would have never put that much into myself....

Double checked the Brodix site. 2.25/1.88 is correct.

Good point on the dyno.
 
Am curious where the timing is happy. We build a 540" and tuned it on the dyno. Not where I expected the timing for that.
It had squeeze tho
 
Picking up where I left off...got into the shop a few nights this week to finish up the short block.

Dropped in 8 piston assemblies
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Forget old school snug down ring compressors. These guys are the way to go. Ridiculously easy and way smoother. Wish I woulda stopped to get a pic of one going in... :doah:
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Checked how far in the hole I ended up with the rings holding the pistons steady. Zeroed out on the block
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0.005" in the hole
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Had my friend degree the cam. He's way more proficient than I am...plus it was 1:00am. Cam was happy at just about 3* advanced.
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The windage tray needed a lot of finesse to clear everything. :grind::hack:
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Buttoned it up with the timing cover, oil pan, and freeze plugs.
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Now we wait on Brodix.
 
So what's the deal with that ring compressor? Is it tapered from one end to the other? :deal:

-G
 
So what's the deal with that ring compressor? Is it tapered from one end to the other? :deal:

-G

That's basically it. The first half inch is tapered so that it compresses the rings into their grooves as you slide the piston in. Bottom couple of inches are cylinder bore diameter. The piston skirt will stick out of the bottom a bit to help align it with the cylinder.

All you have to do is index your rings, slide the piston into the sleeve, align the piston in the cylinder, and push it into the cylinder. When you say it like that, it sounds like a teenage nerd trying to describe sex. :haha:
 

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