VEMS Injector change procedure

[murat]

Hi, I would like to change my stock rs2 injectors to ev14 750cc ones.

What is the procedure step-by-step?

Only req_fuel change is enough?

[A80Avant]

No.
When changing to ev14 you will be hopefully sent injector dead times and voltage compensation. Therefore it is ideal to change to simple strategy as the injectors will work better that way.

However when you do that you will find that its likely that once you change the req-fuel, the ve table will need redoing.

[murat]

So the procedure is
1- set Reg_fuel, injector settings

2- remap VE table

I bought the injectors from 034, and I did not recieved any data for it. They are 750 cc EV14 injectors. Can i find this data from internet because if i write and email to 034 it will likely to get 1 month before I get any usable reply

034 is one of the worst companies I have ever dealt in my whole life! Their philosophy is "Never do the right thing at the first try!"

[A80Avant]

Write to them asking for the data. Otherwise if they are bosch original ones prj I think has posted them here before

[KRIENG]

Another step
idle tune 0.1 ms of 750cc maybe 8% of Eco correction
Hot start and cold start crank curve
Accelerator enrichment

[Jamo]

034 wont have the data, use this as a reference http://www.nefariousmotorsports.com/...0.0title,.html

migrating to 750c EV14 is quite easy the only thing to remember is that the various informaiton on the net is at 3 bar so you need to convert the data to 4 bar for ABY FPR or 3.8 for RS2 FPR

[prj]

034 wont have the data, use this as a reference http://www.nefariousmotorsports.com/...0.0title,.html

migrating to 750c EV14 is quite easy the only thing to remember is that the various informaiton on the net is at 3 bar so you need to convert the data to 4 bar for ABY FPR or 3.8 for RS2 FPR

Conversion will work for flow sqrt(railpressure/3.0)*flow, but dead times can not be converted that way.
There is no fixed relation between dead times at 3.0 bar or 4.0 bar. So all you can do is know that the dead times are all to be multiplied (or divided) by the same factor... unless you have access to a calibration sheet at different pressures and have the factors for each pressure.
A lot easier to find the factor on a mass-flow system with a 100% known MAF. It's much harder on a speed-density system, so you'll inadvertently end up coding some of it into the VE table.

[Jamo]

Not arguing but on the bosch white sheet it gives you the deadtimes according to fuel pressure

[prj]

Not arguing but on the bosch white sheet it gives you the deadtimes according to fuel pressure

If you have the cal data for each pressure that's good. If you only know dead time at a certain pressure, then that's not going to help you much unless you run said pressure.

[murat]

I have found it and calculated them yesterday. I am attaching the sheet here

ev14 750 cc Bosch 0 280 158 117