View Full Version : lower compression for b18c7
votek
10-11-2008, 04:19 PM
hi, if i put a 2.5mm head gasket on my b18c7 .. does anyone know how much it will lower the compression compared to standard?
like 10.1. etc etc
cheres.
WTNESS
10-11-2008, 05:10 PM
u will be looking at 10 or 9.8
votek
10-11-2008, 07:53 PM
how do i work it out?
OMG.JAI xD
10-11-2008, 08:13 PM
http://www.csgnetwork.com/compcalc.html
explains on site.
you need more than just bore x stroke and headgasket thickness.
=]
VTi_b0i
10-11-2008, 08:20 PM
thats the site i was looking for! haha its on my bookmarks at home lol
Limbo
10-11-2008, 10:23 PM
do i see a big boost setup on the way........
votek
11-11-2008, 01:32 AM
does anyone want to help me work it out
Capacity (cm3) 1797
Compression ratio 11.1:1
Stroke (mm) 87.2
Bore (mm) 81.0
2.4mm head gasket
votek
11-11-2008, 01:40 AM
sorry its a 2.6mm one
vinnY
11-11-2008, 03:27 AM
http://www.c-speedracing.com/howto/compcalc/compcalc.php
should be able to work it out yourself
WTNESS
11-11-2008, 09:39 AM
b18c5 results with a 2.6mm gasket to compression of 9.0:1
b8c7 audm spec should be similar i presume, if u strap a turbo on it, it will bog to death til turbo kicks in.
u need a slightly thinner one than that, so it equals 9.8 thats usually the best compression for turbo VTAK!!
votek
12-11-2008, 02:45 PM
thanks for the help..
still in planning
votek
12-11-2008, 02:46 PM
whats the compressions of b16a2 and b18c2 ?
and a sr20det
WTNESS
13-11-2008, 09:41 AM
b16a2 = 10.4:1
b18c2 = 10.0:1
sr20det = 8.5:1
votek
13-11-2008, 02:24 PM
cheers. thanks for your help
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