Lowest compression on engine you were able to get running.
I'm gonna be working on my car tomorrow to see if I can get running but it has low compression. Like 50 on back and 55 on front. Really shitty for a rebuild engine. Anyways, I'm wondering what the lowest compression engine you've worked on and were able to get running and how long has that engine lasted?
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60-0-0 front
80-90-10 rear Didn't run for long, but I was able to do a couple donuts in it... (87 TII) :D |
S5 Vert, with 189,xxx miles. I took it out of comission although it was in running order, but smoking on deceleration. Front ~70-70-70, rear ~65-65-65. The actual motor hasn't been taken apart, and it is sealed, so it might still turn over.
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Originally Posted by idsigloo
I'm gonna be working on my car tomorrow to see if I can get running but it has low compression. Like 50 on back and 55 on front. Really shitty for a rebuild engine. Anyways, I'm wondering what the lowest compression engine you've worked on and were able to get running and how long has that engine lasted?
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last month 0-0-0 and 0-0-0
This customers car had a little excess pressure buildup, oil covered the entire engine bay, and the exhaust ports were caked with wet oil deposits. engine was only 30k miles old, all I had to do was clean clean clean, and replace the oil control rings. |
Originally Posted by vaughnc
Ok you listed the cold compression numbers, what's the hot compression numbers (using a ROTARY ENGINE compression tester).
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I had an s5 block with 63 on the front and 68 on the rear dyno at 210hp at 12psi, lol
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managed to get my turbo II to start with 0-0-0 front and 75-75-75 rear, barly when its cold, hot it wouldnt start unless you push it down a big hill when hot.
i managed to get the car up to 100 mph took quite a while! , i hit 13 psi on 1 rotor!! haha my boost gauge was bouncing back and forth like somethin was gonna xplod!! |
Originally Posted by idsigloo
I don't know yet, haven't started the car yet. Tried to start it but didn't work. Wasn't able to do much else, will be working on it tomorrow.
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Mine ran with 25-25-25 in the front and 35-35-35 in the back
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Originally Posted by vaughnc
Ok you listed the cold compression numbers, what's the hot compression numbers (using a ROTARY ENGINE compression tester).
You need to put some ATF or 2 cycle oil in the spark plug holes to see if you can raise the compression. Also make sure you have a strong battery, if it is weak the compression numbers will be lower due to decreased engine RPM. |
i got 75 front 50 rear
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car runs on 80 80 80
and 60 60 80 |
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