Dynamic compression ratio and pump gas
WebCompression Ratio Calculator. Static and Dynamic compression ratio. (considers cam timing and rod ratio) This calculator will give you the proper compression ratio with a known piston head volume. It will also estimate a dynamic effective compression ratio taking into account the cam timing and rod ratio. Effective Compression Ratio Calculator WebAug 11, 2007 · 120 engle cam, street, non daily driver, pump gas (91) right now the compression ration is 10.6 to 1 94 bore 84 stroke 50cc heads .060 deck height with the biggest spacers. ... the FK8 allows for a higher compression ratio because of dynamic compression with that cam (or static, don't remember which is which).
Dynamic compression ratio and pump gas
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WebJan 24, 2024 · There are a lot of 347s running 11:1 static compression with aluminum heads on premium pump gas with no detonation issues. My Cleveland has 10.7:1 static … http://www.maniacmechanic.com/calculate-required-octane-for-compression-ratio/
WebApr 16, 2011 · It takes some goniometric skills but you can calculate the effective compression ratio by calculating the cylinder volume at intake valve closing and using … WebApr 4, 2005 · I'm reluctant to draw a line to the limits of compression vs octane. A long time ago 6:1 was considered High Compression. I was talking the other day to Scott at King motorsports and he claims to have street Honda's running 12:1 with 93 octane. These have VTEC so the DCR is variable as well.
WebMar 1, 2024 · My concern is, using GoFastMath.com, dynamic compression calcs to 8.76:1. Static is 10.21:1. They suggest 8.5 is a safe max for aluminum heads and pump gas. I realize there are a lot of variables that go into this but can some of you guru's give me some confidence (or not) that this will be ok in my application? … http://cochise.uia.net/pkelley2/DynamicCR.html
WebDynamic Compression Ratio (DCR) is an important concept in high performance engines. Determining what the compression ratio is after the intake valve closes provides valuable information about how the engine will perform with a particular cam and octane.
WebJan 8, 2013 · Effective and dynamic compression drops as altitude increases which is why the higher the altitude the lower the octane requirement. There is only reason for concern … dan taylor authorWebFor carbureted engines with compression ratios of 9:1 or less and boost levels in the 8-14 psi range, pump gasoline works very well. Compression ratios of 10:1 and higher … birthday rhyme for 32WebMar 30, 2012 · on zero lash and theoretical rocker arm ratios. When we enter all of the data into United Engine and Machines calculator we end up with 10.468 static and 8.728 dynamic compression. The owner wants this to be a reliable runner without detonation on 91 pump gas. The car is a 70 Chevelle with auto/3.31's and A/C. dan taylor educational psychologistWebApr 7, 2010 · Pulled out my cam card while in the shop today. the cam is ground with a 110 intake centerline and 277 advertised duration. Using a calculator program I got intake … birthday rhyme monday\u0027s childWebNov 11, 2008 · it all depends on the build. compression relate to not just pistons, but stroke and cc of heads. if you'r motor is 11 to 1 total with stroke, cc in head, and pistons you will be "ok" with 91 octane.but no higher. thats the max. it will run better with higher octane if its 11 to 1. so better to go with 10 3/4 to 1 total. dan taylor fletchersWebDec 21, 2011 · as a side note when i first put the engine in it had a full tank of 87 and stock ignition timing and it didnt detonate/ping then. Static compression ratio of 11:8:1. … birthday rhyme for 65WebSep 21, 2024 · Dynamic compression ratio factors in the intake valve closing point. Some will say this is a more accurate representation of your compression ratio, and some will disagree. Static compression ratio is simply the volume of your cylinder with piston at bottom of stroke divided by volume of cylinder with piston at top of stroke. birthday rhyme monday\\u0027s child