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| 12-28-2009, 10:24 PM | #155 | |
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Private First Class
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| 12-28-2009, 10:45 PM | #156 | |
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Banned
Drives: E92 Jerez DCT M3 Join Date: Jan 2008
Location: Anaheim Hills / Malibu
Posts: 2,244
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| 12-28-2009, 11:41 PM | #157 | |
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Automotive Industry Insider
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The average compression test numbers on a new or low mileage S54 engine is higher than the numbers you quoted. (160-175) You will typically see cylinder pressures in the 180-200 psi range on a healthy S54 engine, if the test was properly done (which is not always the case). I had a compression test done on my 2004 E46 M3 with 8800 miles on the odometer. (June 2005) Here were the results: cyl #1 190 psi cyl #2 180 psi cyl #3 180 psi cyl #4 180 psi cyl #5 190 psi cyl #6 180 psi My results are not uncommon. This is actually closer to the norm. A well-built S54 engine will tend to have higher compression numbers until you get 20,000-30,000 miles on them. This is typically where your leakdown numbers start to creep up toward 10%, and your compression test numbers start to dip into the 160-170 psi range. (naturally aspirated) It will be interesting to see what compression numbers Mike'e engine will get during the test tomorrow. If his numbers are as low as the first compression test, I would wonder if poor tuning may have caused some severe detonation damage to the ring lands under hard acceleration. This would explain the medicore compression test results.
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The best is yet to come...
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| 12-28-2009, 11:53 PM | #158 | |
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Private First Class
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| 12-29-2009, 11:25 AM | #160 | |
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Proove It!
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However his motor has been re-built with a lower compression so if it in fact has been lowered it will not achieve the same numbers as spec and def. not get the numbers u posted. So just incase u didnt know, a lower compression S54 engine is going to get lower compression test numbers. In most engines this is the case, ofcourse this can change with cams etc, but Mikes engine only has lowered compression which was most likely achieved by changing pistons & rods. Also in my experience I like doing 2 compression test, one with the engine cold and one with it warm. I dont find it useless to perform a compression test on a cold engine because then u can compare the 2 numbers and check for consistency, which at the end this is really what ur looking for. Mike, u wont really have a spec since u have had ur engine compression lowered. Find out from VF what it was lowered to, and Im sure Kise (not sure how u spell his name) at SBA will let u know if ur engines ok. He has a lot of experience and knows what hes doing.
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| 12-30-2009, 03:20 AM | #161 | |||||||||||||||||||
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Private First Class
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Here is a synopsis of various posts within many forums/threads:
The following is all from this thread: http://forum.e46fanatics.com/showthread.php?t=729112 Quote:
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http://www.m3forum.net/m3forum/showthread.php?t=300057 Quote:
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http://forums.bimmerforums.com/forum....php?t=1368731 Quote:
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| 12-30-2009, 03:25 AM | #162 | |
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Automotive Industry Insider
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The best is yet to come...
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| 12-30-2009, 03:37 AM | #163 | |
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Automotive Industry Insider
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My engine of course was in excellent mechanical condition (with low miles) and still had the stock 11.5:1 cr. Even at 9.8:1 cr, Mspireds engine should be ~160 psi if it was properly assembled by a competent engine builder don't you think? 135 psi across the board is too low in my opinion, and I hope the compression numbers of his second test come out 20-30 psi higher. (so he can have some peace of mind in the motor) The reason I think it may have just been a bad compression test the first time around, is that his cylinder leak down percentages were so low. That is usually a good indicator of a healthy powerplant. ![]() |
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| 12-30-2009, 10:58 AM | #164 |
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4th down; 4th quarter? Renegade.
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Mspired - I can't believe that you are able to compose coherent arguments and thoughts at this point. Given the same situation, I suspect I would be spitting out sentence fragments and filth flarn filth. I sincerely hope that you are able to put this behind you at some point and once again enjoy your M3. Good luck man!
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| 12-31-2009, 07:39 AM | #167 | |
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First Lieutenant
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Perhaps he wanted to ensure there were plenty of people around when I caught up with him in the interest of his personal protection . . . very wise move on his part. My dealings with Nick Saran and VFE were so disturbing it is almost funny, almost. |
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| 12-31-2009, 07:56 AM | #168 | |
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Banned
Drives: E92 Jerez DCT M3 Join Date: Jan 2008
Location: Anaheim Hills / Malibu
Posts: 2,244
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What in the world was his excuse? Did he even bother to try to come up with one? |
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| 12-31-2009, 10:14 AM | #169 |
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Lieutenant Colonel
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This is really snow balling
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| 12-31-2009, 09:19 PM | #171 |
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Private First Class
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Finally got a response and apology from Nik last night and today and received a check today for $5k ($3600 towards what I have paid to him for stage 3, and $1400 extra).
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| 12-31-2009, 09:33 PM | #172 |
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Major
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Hopefully it won't bounce.
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| 12-31-2009, 10:25 PM | #173 |
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Captain
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good for you. might not be worth all the time and energy, but glad you got your money back, and guessing the extra was for the experience you had to go thru.
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2010 GT3 - Sharkwerks Center Muffler Bypass
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| 01-01-2010, 05:09 AM | #174 |
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Lieutenant Colonel
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Hey Happy New Years!!!
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| 01-01-2010, 08:12 PM | #175 |
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I'm backkkk ;)
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08 E92 M3|DCT|DPE SP-5|RD SPORT|ELITE CUSTOM CATBACK|HAMANN FRONT&REAR|ALPINE HID ANGEL EYES|& MORE
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