Wednesday, July 21, 2010 - 05:35 pm, by: Chris Prak(Carizma)
Okay guys, some of you may know about my saga but anyway, did a compression test today.
Tested dry, with the throttle closed, with a screw-on type tester and cranked until the needle on the gauge would not move no more (about 4-5 cranks). The results:
1- 80 2- 90 3- 115 4- 85 5- 95 6- 135
I didn't bother doing a wet test as I believe they will only tell if it's the valves or rings that are the culprit and as I won't be rebuilding, theres no point figuring out which one it is.
So I'm pretty confident in saying, I need another motor? Oh well number 3 on its way...
Wednesday, July 21, 2010 - 06:22 pm, by: Chris Prak(Carizma)
It's not completely shut when the throttle is closed, and I also thought the ISCV is used to for start-up anyway which bypasses the throttle body. Besides, if I got 135 out of cylinder 6, it's safe to say it's getting enough air to compress.
I don't kill them, they commit suicide because they fear my right foot.
Thursday, July 22, 2010 - 07:30 pm, by: Chris Prak(Carizma)
Thank You very much for that Ned. Great info!
I'm not going to bother with a wet test as the readings are too shocking to even bother fixing as I'm not after a rebuild right now. If I ever do rebuild, I will slowly build the current motor... though in the meanwhile, a second hand motor will suffice.
The current one doesn't even start, even though we have spark and fuel.
Thursday, May 12, 2011 - 06:17 am, by: Matthew Sharpe(Madmatt)
You can calculate maximum theoretical compression from cylinder volume and compression ratio - unfortunately I'm too sick this morning to apply myself to the problem And of course even a brand new engine doesn't give maximum compression.
Your figures look pretty good - well cared for motor there to go that long and still be so healthy