FC Injectors - Part 2

[sadgoth]

that assumes the FD fuel pump runs at 40PSI without an FPR.

[Iwan]

just reading Iwan\'s post again



so if i drop in a FD fuel pump ( which im fdoing anyways ) - that should handle upto 340 BHP - its just the injecotors that wont ?

SOOOOOOOOOOOOOOOOOO

a good starting point to modding an FC is to aim for a min of

2x550 and 2x700cc injectors: up to 330-360 hp on thy fly
with FD Fuel pump

Stu

Cheers Stu!

The FD Pump will manage 340hp for sure. I\'m running one on my FC3S with T04E on 1,1 BAR and about 350hp without probs.

Stu, you have to go for Microtech, you will be suprised about what you (or the tuner) can get of your car

REgards
Iwan

[antnicuk]

the jap model 12a turbo model with fuel injection came with 850 cc inj, but they only had two of them,  they are now well over 20 years old, so its difficult to find matched ones that work properly

[antnicuk]

you are better off dropping in a bosch 040 fuel pump in the tank which you can get for about 80 quid new as FD ones are getting old and they only flow slightly more fuel than a FC. The 040 flowed 350 rwhp on mine and as the FC has a smaller swirl pot in the tank you dont have a problem with \'hicups\' round the bends.   Its a direct replacement virtually and you are getting a new pump.

[grinder]

thing is - i already have the FD pump in the garage

itr got to be better than the FC one ( with 107K on the clock !! )

and i knw what you mean about the injectors - the hunt will continue !

Stu

[Prof]

An FD pump should be good for upto 400 bhp even.  I went with a walb... (can\'t spell it), and that was easy to fit.  They say it supports upto 500bhp - I\'m never going there in a vert !  :evillaugh

Thing is there is no benifit until you change the fuelling pressure or injector sizes.  And as soon as you do either it will need tuning (hence the ecu or piggy back).

If you don\'t, it just gets swamped with fuel.

Still worth doing, as I never have any hesitation and the car runs really smooth now.

Thanks for the info on the water injection.  Steam Power !

[Prof]

Found another possible way to boost pressure on the fuel rails - not sure how naughty this is. :spank

There is a solenoid which is called PRC which cuts vacuum to the pressure regulator, giving an increase in fuel pressure.  This is used when restarting the engine warm, to avoid fuel perculating in the fuel rails.

That means this solenoid probably does sweet FA at any other time, and might be persuaded to lend a helping hand.  There is no feedback loop for the fuel pressure, so the ECU would not be aware that we did anything here.  

Another ECU / piggy back would still have to be used to map the increased fuel.

No idea how much of an increase this might give, but all these few percent all add up.

More Air + More Fuel =  :cool

More Air + Same Fuel =  :flamed

Same Air + More Fuel =  :Hammer

[grinder]

Prof : you scare me

[Prof]

It must be spring !

All these TII\'s being broken,  ebay full of exotic parts - maybe it\'s Christmas! :Santa

Seriously though - this PRC doo hickey could be just the ticket - and it\'s electrically accessable as well - as I\'m keeping my car I don\'t mind modding the loom - but will document everthing in case the car has to go  

[grinder]

can we just stick with the simple IC temp mod to start with !! LOL

[Prof]

You\'re right of course  - running before walking again.....  :Giggle

Did you still want some 720cc Injectors ?

I found some 800cc ones on ebay -  US Seller - for the 89-92 TII, brand new and these were £85 with £20 postage - no doubt I will get stung for duty, but it seemed worth it.

Guy has a shop on ebay - TLF Performanceparts

TLF Performanceparts

Check them out.

What it means is that I now have an throttle inlet that needs a tube welding to it, but it does have a pair of SARD 702cc\'s in it - they are used.  If you want them, make us an offer  :Thumbs-up

Did you see my other post about some bits to test out the project - looking for spare temp sendors? thought you might no someone who has bits

[grinder]

i could be interested in the 720\'s yes

not sure how easy they are to fit though !! LOL

i saw your post - but i dont have any

Nas might have some - or brett might .. he has lots of spares

Stu

[Brett]

What might I have?

[Prof]

Here are some pictures of the inlet with the injectors :

They are low impedance 2 Ohms type - so would need resistors for an S5

I have not tested them, and they are \'used\'.

Sensible offer ?

[Prof]

Brett see the other thread

http://www.mazdarotaryclub.com/forums/showthread.php?t=25281

it might make more sense!


cheers  :cheers