What is the purpose of this table/modifier when you can just add to the fuel map directly?

 

you use this table when using the boost comp method.. the advantage is that you can achieve much greater control over low speed fueling and still be able to provide enough fuel for lots and lots of boost.

here are a couple of resources to explain. The first link is something someone basically copied from the aem forum post

http://en.wikibooks.org/wiki/AEM_EMS...hods_of_tuning

http://forum.aempower.com/forum/inde...&topic=11494.0

I use this method for nearly everything. With this I can have the fueling dialed about 90% in just a couple of wot pulls and about 10 minutes driving. The faster you can get the fuel right the better.. every pull you make when its not right is hurting the motor.

 

Yep. Totally see why you hate Hondata now. lol

 

I don't see how you can use a full boost comp table which is based off of RPM/Load and have it corrected with throttle injection correction which is based off of throttle position? Isn't there going to be times where the motor will be at same RPM/Load at different throttle positions? Wouldn't this cause a problem with a full boost comp map?

 

Nope.. if you tune your own car give it a shot.. you'll be very suprised.

What you can do a lot better with full boost comp is run the engine leaner at medium throttle angles under boost than with a normal style 3d map. This makes for wayyyy better mileage and better response.

Map doesn't exactly equal load ;-)

 

MAP is not Load? I thought these were the same things well not exactly the same but load is basically determined by the MAP sensor, no?

 

map and load correlate, but throwing a turbo in the mix changes how they correlate..

would you say 10psi at WOT is the same "load" on the engine as 10psi at 30% throttle?

 

Actually yes I would guess that it would be the same load. Since the throttle is only controlling just the throttle plate and is not actually playing a role on Load. The engine load would be pretty much be the same. This is one of the reason why I was questioning a full boost comp map. The engine could only take in so much air at a given RPM and if the pressure is the same at different throttle positions, that would throw off the boost comp map? 10 psi @ WOT vs 10 PSI @ 30% throttle..in this scenario the WOT would have less throttle inj correction vs the 30% throttle but both being still 10 psi at the same RPM. Wouldn't one of the scenarios be pig rich or lean?

 

If you search, you'll find a ton of posts (here, S2KCA, and AEM Forums) from WadZii on boost comp tuning. I also have a few in the mix. I agree that boost comp is amazing. It makes tuning the fuel map ridiculously easy and fast. You can also use it to get more resolution and better control. It's one of the things I miss most having gone KPro.

Tim

 

In that situation wot will be what ever aft you want.. at 30% it will be leaner.. which is fine. Get on the dyno and see what power you make at low Throttle vs wot, also watch egts. My philosophy is that load is a percent of Max available power... that's how most oems do it