How to tune 60lb injectors - 56k = ZZzzzzz...

[RooTBeeR]

>_< well i'll play with it tomorrow...just found my tune still had the stock map/vac injector offset tables so i fixed those and will play tomorrow

[thebucky84]

basically what your saying is to get new Inj. Flow rate numbers i take my numbers from flow matching that match the kpa values in the editor and divide them by 1.3. that new list of values becomes my new offset chart values? if that's the case i have 80LB Siemens injectors but when i got them they didn't have the flow math paperwork with them all they had was a paper stating Static Flow Rate: 80 lb/hr at 43.5 psi
Static Flow Rate: 92.38 lb/hr at 58 psi so if i dived the 92.38 by 1.3 then i get 71.061..... but if i use that i would have to make all the values the same and i don't think it will work correctly? trying to get this right and don't understand the walk through completely please help.

[thebucky84]

ok wow i just figured this out ......the injector flow rates table ends at 63 lb.hr flow rate max and you use the offset table to multiply a lower value in the offset table which equals your true injector flow rate. so for my 80lb.hr injectors to work they actualy flow the 71 but i ended up using a flow rate mod of 1.85 which landed in the 50lb.hr range in the offset table. now she runs like a champ!!! the gears are turning ..... the lightbulb just went from dome light to HID's haha

[RooTBeeR]

i used tables from this

[omnigear]

i used tables from this

[RooTBeeR]

Why are you logs secret mac?

[chevyalltheway]

Sorry for bringing this back up but I've tried doing this your way but can't get it down. This is for an LS1 Camaro. I have flow-matched injectors ranging from 661-663cc at 3 bar. I took the short adder table and recorded my Inj PW vs AFR Error. I then used the Error % and multiplied it to the total PW then subtracted the original PW to get the difference which was the adder. So my total PW was multiplied by my Err %.

Am I going at this wrong? It doesn't seem to be making a big difference. Is it possible I just need to continue doing it until it gets closer? I have done this 4 times and haven't seen a major improvement. I copied your Offset table as accurately as possible...Meaning that I only copied the actual offset that matched my Camaro's table, the ones that ended in 0 or 5. I interpolated the numbers between and seemed pretty accurate to yours. Maybe this was wrong?

After copying your Offset I then copied Greg Banishes IFR table ranging from 72-79 lbs/hr.

I adjusted my Min Fuel Milligrams to .0199.

Changed my Min Injector Pulse and Default Injector Pulse to .805.

Note: First time after running these settings and Greg Banish's SPA data I noticed everything was about 6% lean, so I changed my IFR vs Volts to account for the overall lean.

So I started tuning in the way that you described, I am lean at about 1.52 PW so I started adding to the SPA table in accordance to my AFR Err%.


What am I doing wrong???? I'm going crazy.


-Kyle

[chevyalltheway]

Just to add to that, I thought it was odd that my entire VE was within 2-3% prior to the injectors and then it was about 6% off on the entire table. This is not accounting for the fact my Fuel Press is actually at about 60-62 which is about 7% higher then stock. So letting my IFR table sit 7% lower then what I believe to be my accurate I had to lower it 6% lower then that to be accurate. That is 13% lower on my IFR vs Vacuum to be close to what my original error % was.

But I can live with that small inaccuracy if I can account for it in the VE and SPA table. I need some serious help lol.

Thanks,

-Kyle