[Gmecm] Understanding injection system acronyms

[Robin Handley]

I'm currently looking for 2000-3 GSXR 750/1000 TBs ! :-)

Robin

----- Original Message ----- 
From: "William Lucke" <william.lucke at highspeedlink.net>
To: <gmecm at diy-efi.org>
Sent: 14 May 2006 00:32
Subject: Re: [Gmecm] Understanding injection system acronyms


> I have acquired two sets of 98-99 Suzuki GSXR 750 throttle bodies in 
> order to go throttle per cylinder on my Cadillac Northstar. Sport bike 
> throttles are very handy because they already include injector bosses 
> and vacuum ports as well as a way to integrate them into a single 
> actuation mechanism. The 98-99 GSXR 750's have the biggest per cylinder 
> sport bike throttles (46mm). Suzuki GSXR 1300R (Hayabusa) throttles are 
> much more common and are around 42mm. Beware that many of the most 
> modern sport bikes use ECM controlled secondary throttles behind the 
> rider controlled primary throttles to smooth the power delivery. You'll 
> either need to chose a set without or remove the secondaries and plug 
> the shaft holes if you buy a set with.
> 
> Also check out: http://www.msefi.com/viewtopic.php?t=6627 for motorcycle 
> throttle info.
> 
> In extreme racing engines, particularly dragsters, it is possible to run 
> both PFI and TBI at the same time... PFI supplies fuel at idle and low 
> throttle and when the PFI injectors get maxed out, the larger TBI 
> injectors start spraying. This allows the latent heat of vaporization of 
> the fuel to cool the intake charge and supplants the need for 
> intercooling in alcohol fueled forced induction cars.
> 
> 
> Will