Hard to start with compression releases
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From: SW MO
Hard to start with compression releases
I installed manual compression releases during my recent motor project, even though I really didn't need them with the cam and compression ratio I used (Andrew's TW50s). The motor starts easily without popping the releases open. It is however harder to start when using the releases. It has to crank a little longer before firing up. If the motor is warm, it's worse. For example, yesterday on a warm start I popped the releases open and cranked the starter for 4-5 seconds without it starting followed by another 3 second try immediately after. I then closed the releases and it fired right up. I have also noticed the releases don't like to close on their own.
I have 800 miles on this build right now. I did a compression check recently which showed 174 cranking compression on both cylinders. If I plug my motor specs and cams into Big Boyz calculator, that's what it shows it's supposed to be. I have not done a leak down test yet because I don't have a tester, but I am going to get one.
Does this sound like a problem I should be trying to hunt down, or is it just the nature of a cam with longer duration/overlap? I would appreciate any thoughts or advice on the matter. See my signature for additional info on the build.
http://www.andrewsproducts.com/image...alog-Page4.pdf
I have 800 miles on this build right now. I did a compression check recently which showed 174 cranking compression on both cylinders. If I plug my motor specs and cams into Big Boyz calculator, that's what it shows it's supposed to be. I have not done a leak down test yet because I don't have a tester, but I am going to get one.
Does this sound like a problem I should be trying to hunt down, or is it just the nature of a cam with longer duration/overlap? I would appreciate any thoughts or advice on the matter. See my signature for additional info on the build.
http://www.andrewsproducts.com/image...alog-Page4.pdf
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