Crude single injector like a ''5th'' on high boost?
Turbo Mini Forums

ok, im going to give this a go.
And as i dont know much about injection il need some help.....waste of time maybe? but why not...

i have a couple of adjustable pressure switch's that would activate an inj at say 15psi? or whenever it was needed,
i know inj need to be pulsed, so for this i have thought about using a 555 timer that pulses , i wont be able to control the pulses but can control the injector size and the pressure that goes into it, to an extent,

mounted in the plenum facing the butterfly is where it should be i guess????

the reason for doing this is so that to save me having to run a high boost fuel setup on my daily all the time and when i choose to run higher boost i can,
i know AFR's wont be bang on, but they arent always with a carb and like i said it was to be Crude....


So help and suggestions needed please.
thanks

beari in mind if you are running this along side a carb you will need 2 fuel pumps and regs.

could i just not T-off before the reg?? and loop unused fuel from the other side of the rail back into the ''in'' on the Reg?

before the reg is still at the 3psi + boost that the carb see's, for normal injectors you need about 3bar.

ok i see, hence not knowing about it,
but is the idea sound enough?


once the 2nd pump was in etc....

There is no reason why it will not work, Microdynamics used to do a crude PWN controller that would be ideal to drive an injector.

The Turbo Technics kits for cavaliers and such also used to use 5th injectors as I recall.

http://www.suntekstore.co.uk/goods.php?id=...utm_source=gbuk

looks like what i was looking for !!
cheers Tom,

injectors? start small i suppose, then go from there....


got one of these
http://www.alcohol-injection.com/en/water-...ure-switch.html

and one of these just incase,

http://www.ebay.co.uk/itm/330719744930?ssP...9#ht_669wt_1270


then all i need is a bunch of wire and fuel hose a pump and a fuel rail,

BUT
this all seems pretty straight forward in my head, if so, why has nobody else bothered???


Same as turbo-supercharging i guess.....what a waste of time....


OH and the initial idea came from Roberts ''pulling'' the Choke method....

or just buy this??

http://www.ebay.co.uk/itm/hks-5th-addition...d#ht_500wt_1287

but wheres the fun in that...

Can't you find a used MS1? That would seem like a better idea than trying to use whatever crude setup you can get away with. And you would learn about how to use a 'real' ECU.

Jean

http://www.jbperf.com/

could do jean, but il doing that on the Sprint typhoon in fact,

i like to try really,and fail if need be....

http://www.suntekstore.co.uk/product-14002...ler_w_knob.html

pokeyer one. now imagine connecting the arm of a wastegate actuator to the knob so the pulse width goes up with boost ... or , is there a variable output on the megajolt that could control it ?

Edited by robert on 20th Apr, 2012.

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Hasn't Matt Woods just done something like this to his willy?

Pretty sure I have some k series injectors throwing round if you want them Ron? Just cover the post.

I'd love to see matt's willy squirting system, i may take you up on that Andy thanks, let me see what i have laying around atm....may have some from the V6..

Robert, i see what your saying,unsure about if the MJ can do that il have a look,
I think the Apexi avcr i have could do something, i know i can change the duty cycle of the solenoid to change the way the boost comes in,

But if that gizmo above can control the pulse's/flow rate then i think that will suffice for know,have a think for me Robert , thank you..

Or instead of fixing something upon the actuator how about a series of of pressure sensor's that controled a stepper motor of some kind? so as the boost rises, i activates the motor a tad more......unsure of exactly how that would work tho....

There's a few outputs on the MJ that can be triggered at a set boost pressure.

In the 13's at last!.. Just

well at 6 quid a pop ,you could use pressure switches ,and run say 6 pwm units for 36 quid and have each one do a different pulse width on a diferent inj. clicking in at a different rpm.
.

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

What car or engine is it for, and what is the primary means of fuelling ?

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

http://www.jbperf.com/

A very simple solid state circuit aroud something like the ne555 chip you mention can give a variable square wave signal. It would vary the frequency between whatever range you choose from a starting resistance to max varied by a potentiometer. What you connect it to is your choice as robert said the actuator arm moves set amounts dependant on boost. But as others have said a programable ecu is more acurate. weren't you gona be using one on the pickup v6 thing rubicon

My small bore turbo project http://www.turbominis.co.uk/forums/index.php?p=vt&tid=473901