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| safe bore size https://slantsix.org/forum/viewtopic.php?t=15152 |
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| Author: | stolan83 [ Fri Nov 25, 2005 5:26 pm ] |
| Post subject: | safe bore size |
what is a good and safe bore 30 over ,,,,,,,125over what? |
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| Author: | Dart270 [ Sat Nov 26, 2005 2:53 am ] |
| Post subject: | |
0.060" is very safe. 0.100" over is quite common with racers, although some feel the need to sonic check. 0.140" is about the max safe overbore I've heard - good idea to sonic check. Lou |
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| Author: | slantzilla [ Sat Nov 26, 2005 6:38 am ] |
| Post subject: | |
It depends on what you want to do. On a stock rebuild, +.030 would be fine. For any kind of performance build, the bigger the bore, the better the head will flow. Mine has always been +.065 on my street motor, and that was mandated by the pistons I used. My next rendition will be +.100". +.100" gets you into a bore size that is somewhat easier to get pistons made for. 
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| Author: | MJF [ Sat Nov 26, 2005 6:57 am ] |
| Post subject: | |
How about 170. Is it safe to bore to 89mm, ~+.100? It´s going to be turbocharged and will see lots of boost. Or should I stay with 88mm bore, ~+.065. The same piston is available in 87mm, 88mm and 89mm. |
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