Hyaboosta

I have a 2002 civic ex-t I am tunning with emenage(yeah yeah I know it sucks whatever whatever not my choice only option is AEM bling or emenage) when we initial dyno tunned the car we pulled 2 deg timing at WOT and the car dropped on it's face 20whp. The car has been running stock timing on 10psi with a A/F ratio average of 10.5-11.2. Now my plugs over the years have all been fine no signs of detination or breaking up. I do have some spots that I have cleaned up on my tune and would like to get it to a more consistant 11.5 a/f ratio across the board My question is, If I am leaning it out a bit more is there a chance that the it may begin to cause detonation? The more fuel in the cylinders the cooler the temp but do you guys think it will make a large impact?

atec

I think 11,5 is wery rich also.

maybe aim for 12:1
And you should use a knocksensor to listen to audible knock.

ccivic

11.5 should be fine-- I'm not sure how eManage handles correction factors-- if it does at all. If you do not have IAT correction, then you're going to want a fairly rich AFR incase it gets colder (as you will run leaner in cold weather). No need to go into the 10s, though.. 11.5 should be fine all through boost.

nowtype

There is no way I'd run any richer than 11.5:1 AFR with something like Greddy Emange or Apexi AFC. With the way those work, you never know how much ignition timing you are running so you are better safe than sorry.

Hyaboosta

Well The temp os pretty steady in miami. no evry big variations. Emanage hasn't been as bad as everyone makes it seem. The pressor sensor is a plus over having to map trace and use the TPS voltage. Is there a better way to listen for knock when street tunning? Oh and when partial throttle tunning when should fuel begin being added. I know everyone has their own prefrece and suggestions. I have mine but would like to hear what others are doing. right now Im at 13.1-12.6 at partian throttle at about 3 vac and starts adding from there.

nowtype

Newer civics rely quite a bit on knock sensor feedback. this allows you to run Emange with more success. At part throttle run close to stoich(14.7:1). From about -10inHG to 0psi slowly work your way down from 14.7:1 to ~12:1. Once In boost I'd suggest being no leaner than 11.5:1. Remember, as decent as emanage might be, you still dont have the adjusability of your average standalone/chipped ECU. Because of this you need to be ultra conservative.

Also for detonation monitoring, do a search for "det cans". They are cheap and easy to make.

Hyaboosta

thats for all the feedback. yeah I was thining about making a det. I would def. not go any leaner than 11.5 but when I initial get on it, low in 3rd gear during spool my a/f ratio drops to about 10.5 initial and works its way up and levels at 11.2. I have read some about running rich during spool slows spool up down but im not too sure how much i belive that. any thoughts

trickeng

leaning out can definitely aid detonation.

11.5 is rich, but safe. i usually shoot for 11.8-12.0 with similar set-ups. but i'm using hondata or aem, so i have more control over whats going on vs emanage.

Hyaboosta

what about a/f ratio during spool? does a rich low rpm cause a prolonged spool or is that due to airflow intake and backpressure

nonvtecD

A hotter exhaust can spool a turbo faster (retarded timing, lean fuel).