Well, summer is here in Las Vegas, so I decided to take a little bit out of the car to make it safe, untill Methanol Injection is here..

Here's a list o mods

05 Evo
3" TBE, No cat DP included
Megan Header
Ported 02 housing
MBC@20lbs
KNF Intake
Centerforce DF clutch
91oct
ARP headstuds
Comp 280 cams
Walbro 255lph

The wideband is showing 10.4-10.2 when at WOT at all times. I know this is rather rich, but I like to keep it on the safe side. I did all my logging in 4th gear, from 3000-7000(6-speedMR). I've got a full tank of Shell gas too.

Keep in mind that the temperature here get's well into the 100's, so yea.

Any tips or help would be appreciated. Im feeling fine with the tune atm, but if anyone has any pointers, in why I cant get much more timing in the car or it knocks like crazy (4-9 Counts)




TIA

 

It looks to me like you're running a ton of timing in the mid-range (3500-4000) for 91 octane. I run about 6 degrees less. Granted, I'm completely stock, so opening up the exhaust probably allows you to run quite a bit more.

Where are you getting the knock? I think I run about the same timing on the top end (6000-7000), but significantly less lower down.

Also, I take it that you have a walbro too?

 

Sorry, I knew i forgot something. Walbro yes..

I did notice this too about the timing.. I am going to take a look around and see if I can find any other maps, with 280 cams. A few friends of mine run the 272's, and they run more timing than I do, I run really low timing.. But, Ill check it out, thanks.

 

20lbs of boost w/ 10.4-.2 afr is beyond safe. NV has 93oct right?

 

Nope, no 93, only 91. We have 100 at the pump, but I dont like to waste teh moneys.

I know its more than safe, but Im trying to keep cylinder temperatues/EGT temps down too, just because Im driving around and not racing..

 

...thank god for meth. You'll be able to do wonders with the meth...do you have a 4th gear log? Where does the knock start ? and does it go away?

 

just try a 11.2 or so with less timing, and report back. I'll bet you like the performance better.

 

First, get rid of the bolck tuning in your timing map. follow the model set for you by Mitsu, but make it slightly more aggressive. As you move from the 160 to 260 colmuns decrement the timing. I would not run more than 2-3* of timing @ peak boost/torque (3500 rpm). You are running 6*. That is too much on 91 octane.

Second, what load cells are you hitting? What is Evoscan telling you? I suspect that you are off the ignition map when it comes to load. You might have to rescale your ignition map.

Third, as not there suggested try pulling timing and leaning out the AFR to a flat 11:1 after peak boost and 10.9-10.8 by redline. The results might surprise you.

 

Sounds good. Ill look into that. Thanks.

 

The load cells that im hitting are btwn 200-260.. Im going to mess around with the timing on the lower end, 3500 ect and see if I can clean it up.. Thanks.

 

10.5 a/f is not safe, just a waste of gas and performance. Get your a/f to atleast11.2 which is rich and safe then lower your timing from peak torque (3500) through out the midrange by 2 points, and then go from there.

 

I would also add that a rich mixture might trigger knock. I disabled lean spool once and went logging. The AFR was 9.8:1 @ peak and 10.5:1 by 7000+ and there was knock in the log.

 

It does trigger knock depending the situation, I can't never understand how people can justify running 10.5 A/F when ideal a/f is 12.5-13.0, of course we don't live in an ideal world so 11.5 for pump gas is pretty safe with the right timing of course.

 

- less power.

you got too mucho timing....


up afrs, reduce timing.

 

I have a Dynoflash with BC 280's and I am running 17 degrees Idle and at a dry rev (to the 2 step) I get 37 degrees. That is pretty similar to his