Originally posted by Motorsport1207
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M20 885 Cylinder Head w single valve spring
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89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...
new build thread http://www.r3vlimited.com/board/showthread.php?t=317505
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Originally posted by digger View Post
but the duration is very small thats why it is junk for power.
Trapped mass is a tricky subject. To say "junk for power" is subjective if you include torque lol. Trapping mass helps get things moving, but they fizzle out up top. :/
digger
I am surprised the seta and eta have the exact lobes - was it only the bearing count that's different?
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Originally posted by ForcedFirebird View Post
Trapped mass is a tricky subject. To say "junk for power" is subjective if you include torque lol. Trapping mass helps get things moving, but they fizzle out up top. :/
digger
I am surprised the seta and eta have the exact lobes - was it only the bearing count that's different?
I'm not sure if they are the exact same lobes, my only involvement in that graph was supplying the Alpina cam89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...
new build thread http://www.r3vlimited.com/board/showthread.php?t=317505
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Originally posted by digger View Post
yes, i mean good trapped mass/VE at higher rpm. An eta cammed engine is hardly a torque monster havent seen a dyno of one for many years.
Changed the intake from 325i to 325e, added 325i TB and ground TB to "i"spec, 145whp, 170wtq.
Fresh m20b25 ready for spec class, 169whp, 159wtq.
2.7 crank, "i"pistons, stock cam : 180whp
You know me, Digger.....
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Originally posted by ForcedFirebird View Post
Max power with 2.7i: 145whp, 145wtq
Changed the intake from 325i to 325e, added 325i TB and ground TB to "i"spec, 145whp, 170wtq.
Fresh m20b25 ready for spec class, 169whp, 159wtq.
2.7 crank, "i"pistons, stock cam : 180whp
You know me, Digger.....
89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...
new build thread http://www.r3vlimited.com/board/showthread.php?t=317505
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Measured both cams i (K) cam and the SETA. Both lobe circle is similar 1.094 - 1.100. Both lobe heights are the same. 1.360- 1.369. lThe duration on the SETA cam is much shorter. See pic. Don,t really see a need for the SETA cam. I am just going to convert this 885 head with dual valve springs and a “K” cam. Sent from my iPhone using Tapatalk
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