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Gs 1000 with injection
Posted: Thu Nov 26, 2009 11:00 am
by Bat.gs
Hi, this is my first topic in this forum, and i`m shure my questions have been asked probably several times.
My projekt is to tune my `78 Suzuki GS 1000 Bike with EFI.
I got the throttle bodies from a GSXr 1000 that seem to fit well, modifications of course.
But now i do not Know if a microsquirt is the right choice.
I want as less sensors as possible, which ones do i need?
How much pressure the inline fuel pump must have? And do i have to use a Pressure regulator?
I`m thankfull for any information!
Re: Gs 1000 with injection
Posted: Thu Nov 26, 2009 11:31 am
by 24c
You need to read the manual my noob friend. You might look in msruns.com and see if anybody has done your bike before, use the search facility.
As I am feeling kind

... to answer your questions...
First off are you doing fuel only and using stock ignition?
If not what trigger wheel do you have? Does it conform to the versions that MicroSquirt can cater for?
Sensors, you'll need a throttle position sensor (TPS), probably comes with your throttle bodies, inlet manifold pressure sensor (MAP), coolant temperature sensor (CLT) and air temperature sensor (IAT) as a bare minimum.
Fuel pressure depends on your injectors, but a minimum of 2 bar 30 psi is normal, and a pressure regulator will be on your throttle body injector set up, but you'll need a return pipe back to the fuel tank, and a better than stock GS1000 fuel filter.
Hope this helps.
Re: Gs 1000 with injection
Posted: Fri Nov 27, 2009 3:29 am
by Bat.gs
Hey , thanks for the answer.
Of course i didn`t read the manual yet
In the msruns.com can`t find my bike, so i´m the first? Wow.
I think i´m doing fuel only, i want to keep the stock ignition. Guess there is no trigger weel.
Am i right, you think the fuell pressure regulator is already on the throttle bodies? ( as the TPS i hope)
So i only need the Fuell pump.
Coolant temperature sensor is a problem, the bike is Aircooled.
Perhaps picking up the temperature on the cylinder-head?
Also,I wanted to run without a big manifold-case, as for "open" inlet.
greetz
Re: Gs 1000 with injection
Posted: Fri Nov 27, 2009 9:51 am
by 24c
Guess you need to do some more research, parts breakdown and see what sort of ignition trigger there is to make sure. Quite a few fuel only bikes, so you can search for that sort of post too.
Air cooled, you can use head based sensor, but you'll find tapping into an oil line will be easier. My throttle bodies have regulators in them, and so do quite a few others, they aren't hard to spot. More research required
You will need a fuel return back to the tank...check out turbocharged GS1000s, as they will have done all this before you, and you might be able to mod the fuel tap.