Quote:
Originally Posted by ike84
For compression my understanding is multiply atmospheric pressure x compression ratio, so for our cars it should be on the 160 range. But, conditions vary as does equipment precision, so I always look for consistency rather than raw numbers. This is one reason why leakdown tests can be more helpful. Either way though your numbers look great.
Now that everything is back together you have strong vacuum and your fuel trims are spot on. Looks like you fixed it!
With the idle, it takes a few minutes after a big change for it to level out. Was your ac on though? Idle without ac should be around 650 but idle with ac on is much higher, closer to 1k.
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that formula for compression does not work
My 1969 Jaguar E-type XK engine has a 9:1 CR factory spec.for compression is 175 PSI
My 1960 Austin healey BT7 engine has 9:1 CR factory spec. for compression is also 175 PSI
