Double Jetting, with Carb's - TwoWheelForum: Motorcycle and Sportbike forums
 
LinkBack Thread Tools Display Modes
post #1 of 1 (permalink) Old 05-23-2008, 08:41 AM Thread Starter
 
Join Date: May 2008
Posts: 1
Double Jetting, with Carb's

Hi, this idea came with a solution used on the cbr 600rr, the DSFI (Dual Stage Fuel Injection). The idea is using a similar scheme but with regular carbs.

The Bike is a CBR 125R 06, and the point is adding an air trumpet, twin ram air ducts to the air box, and a fuel line and venturi-based valve, so that at higher rpm's and speed, the air passing trough the trumpet forces fuel trough the venturi-based valve.

Like in this scheme:



The venturi-based valve, is simple a small cone pointing against the air dirrection, so that when the air passes, it creates a depression that forces fuel out.

The trumpet is a short-tipe (length=diameter), wich is used for high rev's.

My biggest issue here, is about tuning the carb, because obviously the engine will be receiving more gas, but according to the design it should only receive that extra amount of gas from 6000 our 8500 rpm's (the engine goes to 12000), and I'm not an expert doing that so...

What do you think/advise?

Should I change the jet/gigleurs of the original carb so the mod will work properly?

What kind of tuning will the carb need?

What other mods should I do, so that the idea works properly?
duke_cbr is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the TwoWheelForum: Motorcycle and Sportbike forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome