aem ems What will it do ?

[burldude]

I was wondering how a stock 94 eagle will respond to the AEM ems . I have currently a 6bolt conversion and a tubular header, and kn filter on my turbo awd . What can I expect as far as hp gains ? Is it going to be the best thing for me to buy ? I plan on having this a 450 hp daily driver with much work i assure you . I am not afraid of overkill I would like to have the best for the money , I work hard to get it and want to see this car last me . I have heard of 300hp 14b cars and I would like that to be my first measurable hp mark . Can I regulate the boost timing curves and fuel flow with the ems to acheive this ? I know that there will be other small things such as fuel pump and prefferably larger injectors but will the ems bring this all together ? . I have also heard that it is very hard to tune a ems ? What is the truth behind this . I have read the previous posts and would like to have as much info as I can before I buy one, or if I will buy one .

 

[5150DSM]

Honestly, if you are asking questions of this nature, you are not ready to own/tune an AEM EMS. The learning curve on these devices is steep and the consequences of improper use can be catostrophic.
To answer your questions...The EMS is a fully programmable plug-in unit that allows you to manipulate the fuel and timing maps in the ECU via laptop. It has logging and monitoring capability, external hook-ups for other tuning devices(egt, wideband A/F, etc...)and the ability to coordinate nearly any combination of engine, parts, accessories, etc.. That is a watered down version but it covers the basics. Go with SAFC/datalogger combo, it is fairly easy to tune and much more user friendly, the learning curve is also less extreme and more forgiveable. Also, check out Kyle's tuning guide in the tech article section, there is lots of good information on general tuning and a greater level of understanding to be had there.

 

[HighPSI TSi Guy]

buy an SAFC

 

[hostile]

If you have the cash buy the AEM from somebody like roadrace and have it tuned by them.

Once you have a good solid map then you can learn all the little details and work out how to tune it.

If your going to buy the AEM get wideband and the MAP upgrade.

Since your in cali I recommended Road Race, I don't know how far the drive is but it would probably be worth it.

Minimum would be some denso 660 injectors and a fuel pump, I don't see the point in having a pro tune on the stock fuel system.

If your going to make 300whp on the stock turbo you will need racegas, you might even need cams.

 

[burldude]

Thanks for te replies I still have not decided what I will do yet . The aem ems sounds like it will be the best hp increase for the dollar and a good investment twords long term durabillity . Mapping and timing advance curves can be pretty tricky and I have ruined my far share of Gm 350 but nothing ever boosted . I would like to get in touch with Roadrace and find out what the whole system would cost me from them . How can I contact them ? In will search a little more for there address and Phone number . I dont not have a laptop so Iam assuming that I shall have to buy a data logger . Will the map program record af readings and graph if for me so that I can download it ? Or will I have to plot it with a datalogger and then replot it ?

 

[5150DSM]

Road/Race Engineering roadraceengineering.com
13022 La Dana Ct.
Santa Fe Springs, CA 90670
562-777-1522

A laptop is a neccessity for tuning the AEM EMS, it uses Windows based programming and is manipulable through 3D spreadsheets. You can use a palm to record data and then hotsync to a pc for analysis; however, you will still need a laptop to tune the thing. A new AEM EMS will run you about $1500.00, a wideband, about $350 and a 5bar MAP sensor will run you another $2-300. Fuel pump is $100, 660's will run you about $300 and of course an AFPR should be added to keep your fuel curves linear and tunable. Paying someone to tune the EMS can be very expensive... upwards of $200.00 per hour or more, plus you will not have the experience to deal with any issues that may come up(and they will) so you will have to pay someone every time you change or add parts or anytime your tune changes.
I would venture to say that the SAFC/pocketlogger combo is good until you are maxing out 660's, (around 400-450whp) at that point the correction factors in the SAFC will be insufficient for tuning larger injectors/more fuel flow. By that time you will more than likely have upgraded turbos, cams and possibly the intake manifold, which would then neccesitate a more powerful tuning device. Basically what I am trying to say, is that you don't need the AEM EMS now and based on your goals, you won't anytime soon. It seems to me that the $2000.00+ you would spend on the EMS and having it tuned could be used for many more beneficial upgrades for your car. My .02, take it as you will. Good Luck!

 

[burldude]

Thank you and points well taken . I am looking into getting a Afc gen 2 and a pocket logger . I am also planning on getting some 550cc injectors and a walbro fuel pump . I also am going to need a boost control . I also see an Evo3 big 16g in order . That brings my total to 1500.00 . Without a pocket logger . Choices , I have 1500.00 to spend what are the recomendations. Thank you ,once again .

 

[5150DSM]

Used SAFC-$250
Pocketlogger-$170
660's-$300 (you'll regret 550's later)
Pump-$100 (reccomend a 255lph)
AFPR-$150
MBC-$50
Port 02 housing/manifold (free)
EVOIII 16G-$550
There's your $1500.00, of course you will get a lot more out of the EVOIII if you add a FMIC, also it will be pretty hard to get the most out of your set-up on the stock exhaust. I say chuck the turbo upgrade for now and invest in a 3" turbo-back, that way when you do upgrade the turbo, all of your supporting mods will already be in place. The 14b can push 18+ psi on race gas and does it pretty well, it's good enough for 350hp and low 12 sec passes on a daily driver.

 

[burldude]

I guess I will end this post with , I got a 2.5 turbo back exhaust for 450.00 . Safc in the near future , God be willing ,thanks to all and I am learning with every post read .