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> Anyone running 9:1 or higher on the street?
-JR-
post Dec 19 2004, 02:55 PM
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I'm still hashing over compression ratios. I've been reading online that these motors don't or won't run compressions as high as 9:1 without taking extra steps. Like aluminum cylinders or electronic fuel injection. Mainly just because of the heat involved.

Has anyone "got away" with running higher compressions like this on stock cylinders?

*** IF anyone has any feedback on what fuel grade they are running at their higher compression and if they are getting any knocks ect... I would also greatly appreciate that information too.

Thanks everyone!

James
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Brando
post Dec 19 2004, 11:16 PM
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Also a friend of mine in the petro-chemicals industry desribed such:

Running a higher-octane gasoline blend allows you to advance your timing more, as it has a lower flash (ignition) temperature and burns slightly slower.
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-JR-   Anyone running 9:1 or higher on the street?   Dec 19 2004, 02:55 PM
spare time toys   I have like 19 to 1 buts its in a TDI :D   Dec 19 2004, 03:20 PM
skline   I am running about 11 to 1 in mine. Very responsiv...   Dec 19 2004, 03:23 PM
cha914   Mine is 8.8 to 1 and I run premium (93 around here...   Dec 19 2004, 03:55 PM
SirAndy   9:1 on a 2056 with no special cyl. or heads ... 9...   Dec 19 2004, 03:58 PM
Aaron Cox   euro pistons get me what? 9 ish to 1? i run 89.......   Dec 19 2004, 04:01 PM
Bleyseng   Euro's are 8to1 Aaron..... I am running 8.2to...   Dec 19 2004, 05:30 PM
Brett W   AAAAHHHH the urban legend is back. Compression do...   Dec 19 2004, 11:02 PM
Brando   Also a friend of mine in the petro-chemicals indus...   Dec 19 2004, 11:16 PM
Brett W   Higher octane does indeed burn slower. More timin...   Dec 20 2004, 12:04 AM
Jake Raby   In my testing and experience I have seen that inad...   Dec 20 2004, 11:08 AM
Bleyseng   but isn't that what VW/Porsche wanted to do in...   Dec 20 2004, 11:27 AM
Jake Raby   While melting the heads and dropping seats.... Th...   Dec 20 2004, 12:37 PM
Red-Beard   CO gets better, but NOx goes up, way up, with flam...   Dec 20 2004, 12:47 PM
lapuwali     Dec 20 2004, 02:01 PM
Jake Raby   I have had 10:1 2270s pass emission tests in CA an...   Dec 20 2004, 02:04 PM
lapuwali  
  Dec 20 2004, 02:19 PM

 

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