I will be installing my greddy kit very soon but i need to rebuild my vortech fmu first.
I currently have the 1.6 injectors in but will be purchasing the 1.8 injectors as soon as i can find a set of the 265cc ones.
no bipes as of yet but will be purchasing as soon as i can afford it
I found a good deal on the msd miata box and might pick that up
No intercooler as of yet - no money for one yet.

i want to run 7psi
1.8 injectors - what size fmu disk should i get ?

 

i'll be using the 1.6 injectors for the time being and lower the boost till i get the 1.8 injectors

 

I run a 6:1 disk and it comes out real well. Just get the pack from vortech and change them out for what you need.

 

Well I Just Bought Some 1.8 Injectors And Should Have Them In A Wekk And I'm Ordering The 6:1 Recal Kit Too Hopefully Have It Up And Running In A Week

 

6:1 seems a little low even with 1.8 injectors.

I run RB20 injectors (270cc), a walbro 190lph HP fuel pump and an 8:1 disk.....works very well.

From what I have seen 8:1 seems to be what most people are running with 1.8 injectors FWIW.

 

depends on turbo, injectors, boost level, power output.

a 6:1 at 7 psi of boost will put you at 92psi or so of fuel. Which is good for about 215BHp with 265cc injectors or 175-180rwhp.

a 8:1 at 7psi of boost will put you at 106psi of fuel. Which is good for about 230BHP with 265cc injectors or 190rwhp.

so if you are making more than 180rwhp at 7psi, then try the 7:1 or 8:1 disc as you are probably getting close to running lean, if not, then you'll have more fuel than you need.

 

instead of fixing the vortec you could spring for a begi adjustable unit so you can better adjust your fuel pressures

 

I am just giving mine as an example. I tune for a 12.5:1 afr. The 6:1 disk gives me a real good afr for a vast amount of the rpm range. I am also running WI, which allows me to run like this with no detonation in my opinion.

 

I had 7:1 Disc, running 1.8 injectors and AFR was 10-11....

 

well i ordered the 6:1 disc already and im running the greddy turbo from the kit . well i guess ill see how it goes

 

They sell a whole pack of the disks for just a little bit more money.

 

didn't know that the site i ordered from had them all seperate

 

ahh i found it its 56 for all , i bought the 6:1 kit for $6

 

$6??? What is the site?

 

hehe called ebay - and i forgot to bid lol so i lost out it was a 6:1 kit for $1 and it sold at $1 w/ $3 to ship :(