bmw bike tb

Fuel Supply & Ignition Systems

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bugtub
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bmw bike tb

Post by bugtub » Tue Mar 21, 2017 5:22 am

Looking at efi my first engine and trying to decide on throttle bodies engine is 1835 with a Scat C25. I have come by some bmw bike tb which are very nice thinking of using in pears one each side. Question is would 44mm twin throttle bodies be about the right size

bugtub
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Re: bmw bike tb

Post by bugtub » Fri Apr 14, 2017 1:49 pm

68 views so far and no one can help with tb size :( :(

66brm
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Re: bmw bike tb

Post by 66brm » Fri Apr 14, 2017 11:12 pm

Are you saying one 44 per cylinder or one per head?

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Paul H
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Re: bmw bike tb

Post by Paul H » Sat Apr 15, 2017 3:13 pm

One 36mm throttle body on a stock manifold will give best results
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bugtub
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Re: bmw bike tb

Post by bugtub » Sun Apr 23, 2017 4:04 am

thanks guys
66brm wrote:
Fri Apr 14, 2017 11:12 pm
Are you saying one 44 per cylinder or one per head?
one per head would be my ideal setup
how do you work out what throttle body size to use ?

66brm
Posts: 195
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Location: Perth, Western Australia, The Southern Hemisphere

Re: bmw bike tb

Post by 66brm » Sun Apr 23, 2017 7:05 am

The 44's would work but would possibly benefit from itb style tuning.
Do a search for throttle body sizing

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