slammin86

I am running a vortech supercharger @ psi and am having some problems.
I have my settings at -40 from 1000 to 3500 rpm. then i -40 from 4000 to 5000, then i have -39 to 7000, then -38 to redline. Problem is i am throwing codes 13 and 77. Each time i have been leanin it out 1% at whatever rpm i am throwing the code at. but it still throws the same codes. How lean can i go before i start leanin out and hurtin my engine?

d16tuner

actually I think leaning it out is probably part of the problem with the code 13. I wouldn't worry about that one - it is pretty common with the hack and doesn't seem to affect performance. I have no idea what a code 77 is tho.

TurboEF9

Depends on injector size. There is a formula in the Engine Management FAQ, section 2. I wouldn't go below the settings calculated for you setup using that method. IF you're still throwing baro, then I would try a set of larger injectors (I think you're running 390s, right?). Then you can still scale MAP input back futher, but still have the right amount of fuel.

slammin86

im usin 440's....how much more can i scale them back?

TurboEF9

Use the formula in the FAQ. It's very simple. Plug in your injector size, 2 seconds later, you have your base limit. Don't go below that limit.

slammin86

i have already done that.....it says -46+ 5 for injector latency....but it also says to go up 1% per 1000 rpm;s.....according to the formula i am runnin lean now....

TurboEF9

You are running 440cc injectors..

240 / 440 = -0.54
-0.54 - 1 = -0.45
45% is your fuel flow difference.

-45% + 5 = -40%
40% is your corrected fuel flow.

Do not go below -40%!!!

[EDIT]
Keep in mind, -40 cut across the board will run you lean up top due to higher air flow rate. That is why you correct 1% per 1000rpms.
[/EDIT]

slammin86

I have to dip to 41 for 4000 and 4500 rpm under low throtel....if i go with 40 i throw a cel, code 13. any ideas

TurboEF9

That is dangerously low. By that time, you should be at 8psi (at least). And since you're running at your flow difference, you're effectively relying on your stock (240cc) injecto pulse widths to compensate for the increased cfm.. which it will not.

[EDIT]
..oh, and no, I don't know why you're throwing a code. A -40% cut should be fine. I run -34% at 8000rpm without a code. Maybe Baro needs more massaging than MAP. ..or, it has to do with that 77(I have still yet to find this code listed on ANYTHING.. you're sure it's correct?) code you're throwing.
[/EDIT]

slammin86

I think its probably code 67...bad cat...
what are some warning signs that the cat is goin out?
with the vortech supercharger i dont achieve 8 lbs of boost till about 8000 rpm....i rarely see boost below vtec