Ok, so this is where I'm actually at 7.8:1. So .100 off 60cc is 45cc and .045 off the block puts me right at 10:1. Glad I asked, now I can bookmark this page.
,Cliff
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| Compression ratio, again https://slantsix.org/forum/viewtopic.php?t=40183 |
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| Author: | hellion_locdogg [ Mon May 10, 2010 9:30 pm ] |
| Post subject: | Compression ratio, again |
So I have my (75'-80') head in the shop getting 1.44 1.70 valves put in. After that we will cc the head, guessing avg of 60cc. so using a calc these are my figures, am I missing something? What I have: 60 cc (guestimation) 3.440 bore .175 deck Felpro 3.5 & .037 stock stroke 4.125 = 8:1 I would like 10:1 and that means .100 (45cc) off the head and .045 off the block. I also have a Clifford 264 cam, 1.5 stock adj rockers w shorter push rodsand yes, damper dual springs. ,Cliff |
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| Author: | Joshie225 [ Mon May 10, 2010 9:48 pm ] |
| Post subject: | |
Stroke of a 225 is 4.125". You do have a 225 correct? |
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| Author: | hellion_locdogg [ Mon May 10, 2010 9:58 pm ] |
| Post subject: | |
Yes and I'm a ritard that is why I asked... LOL Thanks let me change some numbers then and see where I'm at. Thank you much Josh! ,Cliff |
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| Author: | hellion_locdogg [ Mon May 10, 2010 10:04 pm ] |
| Post subject: | |
Ok, so this is where I'm actually at 7.8:1. So .100 off 60cc is 45cc and .045 off the block puts me right at 10:1. Glad I asked, now I can bookmark this page. ,Cliff
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| Author: | Doc [ Tue May 11, 2010 8:26 am ] |
| Post subject: | |
If milling both the block and the head, I would take the heaver cut off the block & leave the head as thick as possible. (the block is a bigger, thicker, more stable piece of cast iron so it takes the heavy cut a little better) DD |
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| Author: | hellion_locdogg [ Tue May 11, 2010 12:20 pm ] |
| Post subject: | |
Thanks Doc! ,Cliff |
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