90 Turbo

iTrader: (3)

Hello,
I am about to change injectors. Currently have 460cc injectors and am changing to 550cc purple tops (although look more like red).
My current required fuel setting is6.2 and 6.2 ms. I know I need to change them by the percentage of injector change.
17% i believe. So do I add 6.2 x .17 = 1.054
So do I add or remove 1.054.

What about ms do I change that.
I have the ms2 diypnp.

Also in looking at my ve table at the top in boost I am in the 120-129 range is that ok.

Idle is at 32 ve.

Thanks in advance I tried to figure it out by searching.

Techsalvager

remove, also I bet your dead time is what 1.2?

90 Turbo

iTrader: (3)

so 5.2 req fuel do I change the 6.2 ms to 5.2 too.
What is dead time and should I change it.
You are right it is currently at 1.2. Should I change it.

90 Turbo

iTrader: (3)

In my searches it showed the 550 needed a 7.0 to 7.6 req fule why is mine so low?

Also most ve table I see dont have any # over a hundred but mine does. Can some one please explain.

Also what is dead time?

Braineack

iTrader: (62)

new req_feul should be 5.2. thats all you should change.


/thread.


math, since you messed it up: 460/550 = .84 x 6.2 = 5.2

y8s

iTrader: (8)

to add to brain's "/thread" comment... here is why:

your engine's VE is not changing. therefore the VE table shouldn't need to change. just the scaling of the fuel and req_fuel addresses that.

90 Turbo

iTrader: (3)

Ok. I get that I guess my question is what are the acceptable limits/range of ve cells. I see most people dont have anything over 100 in htere map. Mine goes to 129 in boost at high rpm.
Is that anything to be concerned about.

Braineack

iTrader: (62)

nope. you could techincally leave the req_fuel value the same and rescale the entire ve table by 117%


then youd be well above 129%VE

y8s

iTrader: (8)

VE Table can go 0-255 I believe.

the more you use, the better your fuel resolution. Just dont run out!

VE can be above 100% with boost since you're pushing more air into the cylinder than it can suck in by itself via vacuum.