84B23F
Well-known member
- Joined
- Feb 11, 2008
- Location
- Kansas, USA
A high revving.......................would be awesome.
Awesome - 2006 Williams Cosworth CA2006 V8 F1 20,000 rpm
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A high revving.......................would be awesome.
Awesome - 2006 Williams Cosworth CA2006 V8 F1 20,000 rpm
Yeah, I worded that awkwardly. The B18 and 6-bolt B20 rods are dimensionally the same, although the B18 rods are lighter and weaker.
They changes the bottom end bearing sizes for the 8-bolt B20's. The 8-bolt B20 rods are dimensionally the same as B21 rods. basically Volvo redesigned the bottom end of the motor a few years before they redesigned the top end for the B21.
I bought a set of B20E rods. I'll have the same thing done with the wrist pins as I had done with the B18 rods - press out the brass bushing, and ream it lightly for an interference fit on the 24mm wristpins.
The weird little marks inside the big ends were *right* on that weak spot.Good move getting the B20 rods. When compared side by side the weak spot in the B18 rod becomes obvious.
I bought a set of B20E rods..
but the rotor had a little burn hole near the center
In the meantime, I dremeled out the hole in the rotor and filled it with JB Weld, I'm not sure if that will work or not. I'll try it when I get home.
I've been using that cap/rotor/distributor for probably 30K miles prior to this. Never an issue. The MSD 6A box has only been on for about 5K miles though. Prior to that the Crane optical box was driving an old square Mallory coil directly. powerful - but nothing like the lightning bolts the current setup is tossing out.
I think perhaps the issue was that the cap/rotor had been off and sitting around for a while on the work bench while the motor was apart, it had a little oil in it. I cleaned it out with a shop rag, but it might have been enough to get a carbon track started?