My car is scheduled to finally get the AEM EMS installed next week. Ive called around to a few places just to see what options I had as far as tuning goes. The place I am taking it to is an authorized tuner of the AEM unit, so naturally I want to go there to get things rolling. However, as far as I know, he will only be doing dyno tuning.

When I called around to some other shops, such as DRT and Performance Factory(both very reputable shops), they both said they a majority of the tuning would take place out on the street, and that dyno tuning is mainly for full throttle tuning.

Im kind of confused now about the whole tuning process. I would think that if you tuned it on the dyno full throttle, then that would also cover regular street driving.
Can someone explain why full throttle tuning wouldnt be sufficient and would still need to be tuned out on the street during normal driving? As far as I know, the AEM unit is not able to be tuned or programmed while driving so Im stumped.

 

full throttle - a good tuner should be able to tune the car good enough on the dyno. it should also be enough to make the car streetable.

its not a bad idea to have it tuned on the street to correct the a/f ratio.. its not necessary to do dyno tune after that, but doing so might bring out extra hp.

street tuning would be more of drivability tuning... if thats your daily driver, most of your driving is partial throttle.. - any of tuning should be done with wideband o2,
just make sure you get your money worth on that one. - if taking too long, your car is a practice car.

 

I always thought street tuning is for people who don't have access to a dyno. Weird.

 

Thats pretty much what I thought as well.

 

no, street tuning is good for partial throttle. my car ran great on the dyno with hondata, but on the street it had its flaws. 1.5hrs later on the street using the wideband and stage 4 things were so much better. better mileage, better response and it still dynoed at the same peak # on the dyno +/- 2pts on whp and ft.lbs

but on the other hand, i agree that a good tuner should be able to make the car very driveable just using the dyno. it just depends on what you expect from the car and how particular you are.

 

another thing, WOT runs on the highway are probably a little bit more realistic i guess do to airflow and what not....

 

true

 

if your car is used as a daily driver, street tuning is much more valuable then dyno tuning.

only dyno tuning is needed if running off the stock ecu. but with a stand alone, street and dyno is a must.

 

So you think as long as this guy knows how to tune with the dyno for WOT, then I should be ok for awhile on the street until I can get another more detailed street tuning session scheduled?

EDIT: I cant speel


[Modified by RTW DC2, 4:43 PM 10/18/2002]

 

you're correct ... street tuning is best plus its more accurate than the dyno in terms of the air that will be used vs that around the dyno.

How I do it is tune WOT on the dyno, then graph 3d timing and fuel curves to clean up all the "flaws" in the non WOT maps. if your EM does not have the 3d graph flexibility then you need to tune it on the street wihtout WOT, leave WOT for dyno.

Also, DRT is your best bet like I said, Ralphy has done this a million times before and I'm sure he will cut you slack on price and install plus dyno tune ... he's also an AEM dealer.

Greg

 

yeah, no probs should occur. i was fine when i came off the dyno, but like i said, i like things to be perfect, its stupid, but that how i am. you will be fine, just tune on the dyno, save up some money, and go spend some time on the street, things, like idle and partial throttle a/f are better tuned on the street in my opinoin. just my 2 cents.

 

i *believe* the EMS does have that......at least according to the SCC article, and we all know how accurate those are...

 

Thanks fellas

 

It definitely does have the 3d graphs

 

I always think that you can only tune part throttle on the street with a wideband O2 sensor.
Dyno is only good for full throttle setting.