If i were to put 850s in the primary and keep the secondary their stock size and run my turbos non-sequential. Would it be safe to just run the pfc without tuning it, off course i would set the pfc non-sequential and change the size in the primaries to the correct 850cc setting. Does the pfc self adjust the fuel maps when i change the settings for the primary injectors. I'm planning on running 14 psi. I rather not send my pfc for a $150 makeover.

 

As far as the install of the 850's is concerned all you have to do is change the per minute flow value and the inj pulse correction as per manual page 26 and of course do the battery reset/relearn and you should be good to go. I just did this and I'm happy with the results(and cost)

 

Does the car run the same i mean does the pfc adjust the fuel to compensate for the larger primary injectors. Does you car run rich and back fire at low rpms. I have pretty much the same stuff as you but i dont have a fmic yet.

 

it runs the same but you have to adjust the accel settings to get low speed drivablity back.If you just plug them in and set the PFC Injector settings to 850cc and change the injection pluse correction to 64.5 and the change the lag to .04ms(all of this is on page 26 in the manual) it runs ok and will work but it bogs and hick ups a little in low speed ,light load starts. To fix this I played with the pim maps but that didn't help much, so I tried the accel settings. At first it took fuel out thinking that a bigger INJ was adding to much fuel but it wanted more fuel. I guess the bigger injector takes longer so you have to "kick it" into gear with more fuel in the accel table. What ever, I'm just guessing, but all in all it was easy/cheap and works good. My duty cycle went from 90% at 7k to 73% and shifting at 7.5k

 

I was wondering what other people did to their's after the install?

 

I went out for a long test drive and had some beers afterward

Relearning was what I forgot to do. So after about 15 minutes of test driving, I unhooking the battery and had some beer.

 

My power fc showed 98%, but i think my car was tuned way too rich because i hear that the base map is good for full exhaust and 12 psi i'm not sure about 14 psi. I've heard the same concept about the accel maps on the haltech list for bigger injectors(usually 1600cc). Did you have any fitment problems, someone said that they hade to use an extra o-ring to keep the stock one from popping out. I have an extra manifold and injectors. I'll mess around with them. Badog did you have to readjust your correction maps or did you just reset the computer. Should i set the maps back to the original one by initializing the pfc because i want to start from scratch. Plus i dont think the shop that tuned my car before knew what they were doing and theya are not a power excel dealer. 90% is not that bad as compared to 98%. I think it hit 98% at the drag strip but all i really remember was saying "Holly **** what the f**k" I dont think my car will see the drag strip again till i put in the injectors.

 

I used the values from the PFC manual for the 850's...I thinks its page 26. I used the datalogit to set them.

I did the extra O-ring behind the lower one (nearest the tip). But I am thinking about going back in and grinding the seat down. Reason why is that I am not sure I used fuel-safe o-rings.

I really didn't reset anything, I re-learned with the new settings. Once that happened the idle settled down. I did end up fine tuning a little bit to get the idle and A/F down a little bit...at rock solid 820 rpms.

Yah, anything over 90% is like wide open. Since the conversion I have seen about 83% as the highest. Still need to baseline soon, the 16th....dyno time.

 

Going today to dyno with a wideband will let you know whats up.

 

Why not just get a extra set of stock o rings from the dealer. I think Mazda calls them insulators. Seems to me that they are only a few dollars and you know they fit perfect.

STEPHEN

 

You use them too. The extras are small ones that ensure the stock ones sit at the end of the injector and seal in the primany location. Thay are used as spacers.

 

What is the good news!

Edit: I see it on another now.
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