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Author Topic: Alternative performance pistons & squish  (Read 10549 times)

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Offline PeWe

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Re: Alternative performance pistons & squish
« Reply #50 on: September 25, 2018, 11:54:08 AM »
Quote from: simon#42 on September 25, 2018, 11:48:13 AM
sorry captain i miss understood that , not the first time that has happened .
maybe a little bit too advanced in thought, need to retard a little...  8) there are various technical terms and ways of explaining
I did not follow that either. thanks to you we are more that know
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CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline Old Scrambler

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Re: Alternative performance pistons & squish
« Reply #51 on: October 01, 2018, 07:14:48 AM »
Regarding my C.B.R. motor......We retarded the ignition from stock setting and FOUND 5-HP when ONLY tuning for peak power at WFO
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Dennis in Wisconsin
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Offline Ilja

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Re: Alternative performance pistons & squish
« Reply #52 on: October 06, 2018, 03:17:21 PM »
I tuned the ignition of my turbo cb750 with an ignitech module with MAP sensor (and GPZ stator+rotor), and just followed the torque curve of the dyno a bit. After peak torque I gradually increased another 2-3 degrees.
And the whole thing is boost retarded from 0-7 degrees at 0 to 15psi.

Works nicely and is also not expensive.  8)
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