Compression test /High altitude = lower readings
#1
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Compression test /High altitude = lower readings
Hi, I am recently back to an Rx7 and read all the stuff about buying a used one and what to look for,etc...., well I bought it and decided to run a compression check on it.It bounced up to about 85 or in that range, but!!! I found out later that high altitudes affect compression readings. They will be lower. Is anyone familiar or have any info on that? I live in AZ at 7000 feet...so Im hoping my compression would be higher if this is true? Thanks
#3
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Foxed.ca - Rotary Compression Calculator
This might help you out. Found it on a thread somewhere in this forum but can't find the thread itself at the moment.
This might help you out. Found it on a thread somewhere in this forum but can't find the thread itself at the moment.
#4
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You can use the calculator in the above post, or click on the RX-7 Manuals tab and use the graphs in Chapter 1 of the 1988 FSM.
I would recommend a turbocharged engine for high altitude. Non-turbo engines suck wind at high altitude.
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