With a bore of 4.300x4.375 stroke it makes a 508. You can bore the existing sleeves just like any block. If they end up unservicable, they are replaceable. I'm not going to make an undersquare engine. It will be 4.280 x4.250. I thought about doing an odd ball engine just to be rare, but it adds stress to the pistons limits the rpm potential a Hair.....
There were a few factors. Weight, GM Engineering, and last but certainly not least, history. The 540 idea came and went pretty quickly. I had to be a little economical. This allows me to reuse my pistons, carb, clutch, and fuel system. Going 540 would have added 50 lbs even in aluminum and my components just aren't ideal. This should provide all the power I need to do what I intend. Pretty sure I found the only resale block for sale in the US. It hasn't been used but I saved about $900 over getting it at the parts counter.
The usable RPM won't change to much from the old motor. My exact words to him were, "This car is 50% race and 50% street" I don't want to give up my highway cruising drivability but want it to rev higher. I'd say it will have usable power from 2500-6500. Redline should be in the mid to high 6k.....The cam is still up in the air.
Bore x's pie - times stroke times 8 -- 473 cubic incheroos
Somewhere my math SUCKS Phone water! I've checked this three times and it comes out 473 --- but the actual displacement would - as Todd states - be 508
so what am I missing??
Just a question but did you have the oil filter bypass blocked off? I had the same thing happen except my gear failed due to poor engagement coupled with MSD's crappy gear. I haven't put enough miles on mine since to know what the filter looks like but since I have the bypass plugged and everything is forced through the filter I'm crossing my fingers that no major damage was done. You're making me doubt that now
Brian Hobaugh SCCA National Tour June 2014
First Hemi 'Cuda Convertible Ever Built
Short clips: Goodguys Pleasanton autocross and pit videos
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