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| sawbones |
 Posted: Wed Oct 26, 2005 9:23 pm |
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Rookie
Joined: 26 Oct 2005
Posts: 3
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Hello,
I was reading your write up on the new Keihin CRs and was wondering if you might now where to get a set of aluminum velocity stacks for them. They run great on my 750 chopper with the included plastice stacks, unfortunately they looka bit hokey on my bike.
Thanks for all you help,
Sean |
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| Satanic Mechanic |
| Posted: Mon Nov 21, 2005 4:29 pm |
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Moderator
Joined: 04 Sep 2005
Posts: 309
Location: Munich, Germany
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Sean,
there is a person on German Ebay who is manufacturing aluminum stacks for CRs. Have a look at item #8016307899 - they're billet made and niceliy polished, but they have their price. I am not afiliated in any way, I just ran into them on Ebay.
Seller's name is macgreifer just in case the auction ran out already.
He is making them on request. |
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| sawbones |
| Posted: Tue Nov 22, 2005 8:36 pm |
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Rookie
Joined: 26 Oct 2005
Posts: 3
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Thank you for the link to the velocity stacks! I have searched everywhere for them so I am much appreciative!
Thank you again,
Sean |
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| Satanic Mechanic |
| Posted: Tue Nov 22, 2005 9:02 pm |
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Moderator
Joined: 04 Sep 2005
Posts: 309
Location: Munich, Germany
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| Glad you like them! If you need help with the language, just let me know... |
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| sawbones |
| Posted: Tue Nov 22, 2005 10:41 pm |
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Rookie
Joined: 26 Oct 2005
Posts: 3
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Hello again,
The velocity stacks are listed at 40mm long. Is this a good length for street use? I would like to have my power during acceleration instead of high end!
My motor is a well built 836 that dynoed around 93 hp at the crank.
Thank you again,
Sean[/quote] |
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| Satanic Mechanic |
| Posted: Wed Nov 23, 2005 5:41 am |
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Moderator
Joined: 04 Sep 2005
Posts: 309
Location: Munich, Germany
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Most velocity stacks I have have around 40mm length. In general, a longer intake duct provides more bottom end power, altough I guess the length of the velocity stacks only has little influence on the power band. The stacks should have a certain length, though, to avoud turbulence at the carb mouth.
Bottom line is: 40mm sound perfectly well 
And 93HP out of 836cc is pretty good! Congratulations! |
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| Satanic Mechanic |
| Posted: Sat Dec 03, 2005 4:37 pm |
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Moderator
Joined: 04 Sep 2005
Posts: 309
Location: Munich, Germany
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Michael Niemann of Egli Racing has given me a word of caution on using other than Keihin's velocity stacks on CR carbs: Differently shaped stacks may cause a low pressure zone around the air correction jet which in turn leads to either lean mixture at WOT and/or bad idling.
It's a different situation on the FCRs, but the CRs seem to be pretty touchy with the stack length and shape. |
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| kekems |
| Posted: Mon Jan 02, 2006 4:38 pm |
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Rookie
Joined: 23 Nov 2005
Posts: 4
Location: BRUSSELS
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hello, everybody
happy New year 2006
concerning the stacks , i ordered from the guy in germany a set for my
CR 33mm ramp and they look great
How they work , well a bit of patience... the engine is still far from turning.
Marc |
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| matt1 |
| Posted: Thu Jul 20, 2006 6:59 pm |
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Junior member
Joined: 13 Feb 2006
Posts: 11
Location: Boston
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I have tried to find these stacks on German ebay, but can not. I am buying a set of 29mmCR's and would like the look of these stacks. Can some one help me out?
Thanks
Matt
hubbell_1@charter.net |
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| Satanic Mechanic |
| Posted: Sat Jul 22, 2006 1:53 pm |
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Moderator
Joined: 04 Sep 2005
Posts: 309
Location: Munich, Germany
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| Try ebay item 8072456576 - they are for FCRs not for CRs but this is the guy who manufactures them. |
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