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Advantage or disadvatage of this type of throttle body
Posted: Sun Mar 09, 2008 6:29 am
by racemier
Hi,
What are the advantages or disadvantages of using a throttle body like from Ducati?
Could this setup be used to convert carbs to throttle bodies.
Question is because my engine is e V-twin and throttle bodies are hard to find. Also the still need to be connected with each other and have the possibility to sync them. All this I have already with the carbs.
Posted: Sun Mar 09, 2008 9:03 am
by old guy
I would look at TL 1000 or SV 650 Suzuki throttle bodies. Probably a lot cheaper than Ducati. Look on E-Bay.
The SV 650 would probably be the best, because the TB's for the 1000cc bikes are pretty large.
Re: Advantage or disadvatage of this type of throttle body
Posted: Sun Aug 24, 2008 7:17 pm
by FIntruder
According to a website I just visited, the farther the injector is away from the intake valve the better for high revving engines. This has to do with giving the fuel more time to atomize with the intake air. The throttle body needs to be as close as possible however. What kinda V-Twin are you working on?
Re: Advantage or disadvatage of this type of throttle body
Posted: Mon Aug 25, 2008 10:06 am
by SQLGUY
Can you post a link to that web site?
Re: Advantage or disadvatage of this type of throttle body
Posted: Tue Aug 26, 2008 10:29 pm
by FIntruder
This is the link:
http://www.dtafast.co.uk/Throttle%20bod ... #positions
Specifically this paragraph:
Where is the best place for the injectors?
Where one injector is to be used per cylinder the best compromise position is immediately downstream of the butterfly. This gains maximum advantage from local turbulence and gives results surprisingly close to the optimum at both ends of the rev-range. This is the recommended position for most applications
For performance at low RPM, economy and low emissions the injector needs to be close to the valve and firing at the back of the valve head. This is the favoured position for production vehicles.
For higher RPM (very approximately 8,000+) the injector needs to be near the intake end of the induction tract to give adequate mixing time and opportunity. The higher the RPM, the further upstream the injector needs to be. As a result, use of speeds above approximately 11,000 RPM may give best results with the injector mounted outside the inlet tract altogether (see our remote injector mounting). It is common to fit both lower and upper injectors in such a system to cover starting and low RPM as well as high speeds.