Somebody Needs to Turbo the CB1100

[grover_imp]

I'd be interested to watch it happen. My thoughts are that at 9.5:1 compression, the CB does not seem too high-strung to prohibit turbo'ing, though to be super safe you might want to install head studs and possibly install a thicker than OEM metal head gasket.

Before getting that far, I think you'd need to rework the cams to call for the additional air/ fuel and exhaust expulsion. Is it possible to commission a cam to be made?

I'm no expert, but sounds like you have some solid experience in fabrication. Keep us posted on your experimentation!


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[kDiqq_imp]

I'd be interested to watch it happen. My thoughts are that at 9.5:1 compression, the CB does not seem too high-strung to prohibit turbo'ing, though to be super safe you might want to install head studs and possibly install a thicker than OEM metal head gasket.

Before getting that far, I think you'd need to rework the cams to call for the additional air/ fuel and exhaust expulsion. Is it possible to commission a cam to be made?

I'm no expert, but sounds like you have some solid experience in fabrication. Keep us posted on your experimentation!


Sent from my iPhone using Tapatalk

Due to the uniqueness of the eninge I'm willing to bet that head studs and thicker head gaskets are out of the question.

A camshaft change isn't need but you're right that it would benefit from more duration. The only thing that comes to mind is CB1300 cams. Based on the extra displacement alone I'm guessing it has a bit more lift and a bit more duration with probably a bit less overlap.

Again though, if you're only looking at a few pounds of boost (again we have no idea what this motor will hold) you can pretty much just bolt it up and it's gonna run fine with tuning.

The cool thing is this engine shares the same bottom end design as the more powerful 1300cc motor, so I know it has quite a bit to go before it feels stressed. I'm too strapped for cash to take on this project myself, but my services are offered to those who want one built! I will try to find a turbo to best fit this application in the meantime. Though my gut is saying it's probably gonna be GT15 or GT20 series.

I'm very excited to try this! Someone in the Houston area needs to show interest so I can help

[ClassicVW_imp]

Why would you try to make the CB into something completely different? Just go buy yourself a 170HP bike fer cryin out loud!

See [url=http://cb1100forum.com/forum/showthread.php?tid=3921&pid=58208#pid58208]here for the Cormanus Theorem and the Spaceman Corollary which, roughly restated say, "We all know better than the original designer and any modification we make is always applicable and appropriate for everybody else."

See [url=http://cb1100forum.com/forum/showthread.php?tid=3921&pid=58208#pid58208]here for the Cormanus Theorem and the Spaceman Corollary which, roughly restated say, "We all know better than the original designer and any modification we make is always applicable and appropriate for everybody else."
Thanks for the link, I totally agree, Cormanus!