R33 Ecu Decision

[stocksy]

Hi i got a Auto r33 gtst i have been tossing up wat to get.. It is either APEXI-S-AFC2 or a Greddy E-manage.. I want about 220kw-240kw atw eventually. I just dont know wat to get, can everyone give me some insite into this issue.. i just bought my r33 and recently had a wrx so my knowledge of r33 mods are minimal..

[MR331307]

Hello

if you want a replacement ECU i can supply a HYDRA EMS which is a straight plug in and Controls the Auto box features.The ECU gets rid of the AIR FLOW METER and runs A 3 BAR MAP SENSOR which will give you a better tune. It also allows you to change the type of coils you run EG falcon Coils.

$1500 with a Base map

[rob82]

  MR331307 said:

Hello

if you want a replacement ECU i can supply a HYDRA EMS which is a straight plug in and Controls the Auto box features.The ECU gets rid of the AIR FLOW METER and runs A 3 BAR MAP SENSOR which will give you a better tune. It also allows you to change the type of coils you run EG falcon Coils.

$1500 with a Base map

So it actually controls the auto or does it just render it into complete limp home mode aka wolf3d.

[paulr33]

how does a map sensor give you a better tune? its less accurate.

also curios does it actaully interact with the autobox or is it like the other ecu's and just assumes manual and doesnt cut timing on gearchanges.

i would go with apexi safc, apexi sitc and that should give you all you need. that power level should be easy with those piggybacks and it will be cheaper and more useful than the emanage

[MR331307]

No AIR FLOW METER ECU Gives you an accurate TUNE

i aint starting this argument AGAIN

How can you state it doesnt give you an accurate tune you musnt have any knowledge behind tuning

and the ECU fully controls the Gearbox . It has its own Gearbox AUX to control Pressures and other Custom settings. When the ecu is installed into the car the ECU comes with a base tune which has this function controling it.

[paulr33]

the best and more accurate way to measure the amount of air coming into the engine is via a hotwire airflow meter. the map sensor method guesses the mount of air in the system by working out a given pressure and doing a mathematical guess on how much is likely to be present.

ie: once you hit target boost the amount of "air" present never increase

even though more air is coming into the system

with an airflow meter system the amount of air coming into the system is always increasing, despite being on target boost in the manifold.

so please explain how a map sensor is more accurate

[rob82]

  MR331307 said:

No AIR FLOW METER ECU Gives you an accurate TUNE

i aint starting this argument AGAIN

How can you state it doesnt give you an accurate tune you musnt have any knowledge behind tuning

and the ECU fully controls the Gearbox . It has its own Gearbox AUX to control Pressures and other Custom settings. When the ecu is installed into the car the ECU comes with a base tune which has this function controling it.

So you can command the shift solenoids as well? TPS vs VSS shifting like most OEM manufacturers I presume? Can you give us so more info cause that sounds too good to be true.

[predator]

An airflow meter is not actually reading "air" either.. it's measuring the change in heat to the afm element cooled by the amount of "air" flowing through the "hotwire".. again, it pretty much uses calculations to work out the amount of air going in. They're too different methods to do essentially the same thing and each has pros and cons.

[MR331307]

i understand where your comming from

i aint starting an argument again i think more people should do research into MAP sensors and get out of the Air flow meter ECUS

1 majour bad thing about the Air flow meter is that it restricts air flow

the second in big injected and turbod cars have problems idleing with Air flow meters while with Map sensors you can adjust the map to suit and fine adjust it to give you stable idling

personally i have researched into ecus and have found the map sensor is much more reliable and accurate

giving you no restrictions

Edited May 9, 2006 by MR331307

[MR331307]

so far there are only certain cars which this ecu works on

and currently the Skyline

GTR GTS is one that is proven

yes it adjusteds shift points,Stalls and any other Gearbox auxs needed. i know i have tried it and carnt believe it works myself thats why i recommend this ecu to everyone. Its one of the best on the market.

i think the designer must of designed it Specially for SKYLINES

lol

[stocksy]

  paulr33 said:

how does a map sensor give you a better tune? its less accurate.

also curios does it actaully interact with the autobox or is it like the other ecu's and just assumes manual and doesnt cut timing on gearchanges.

i would go with apexi safc, apexi sitc and that should give you all you need. that power level should be easy with those piggybacks and it will be cheaper and more useful than the emanage

yeh i was kinda goin towards the apexi safc, but does the e-manage have more features. I aint worried about the price but seriously wat is the best between the two..... I have never heard of a HYDRA EMS . Are they very reliable??

[rob82]

  paulr33 said:

the best and more accurate way to measure the amount of air coming into the engine is via a hotwire airflow meter. the map sensor method guesses the mount of air in the system by working out a given pressure and doing a mathematical guess on how much is likely to be present.

ie: once you hit target boost the amount of "air" present never increase

even though more air is coming into the system

with an airflow meter system the amount of air coming into the system is always increasing, despite being on target boost in the manifold.

so please explain how a map sensor is more accurate

As long as you can calculate the mass of the air charge ie manifold pressure and temp, both systems will be equally accurate in steady state systems. However the majority of cars life is spent accelerating and decellerating hence it is a very dynamic system. This is why MAF based ECU's can provide a more consitent tune as there is a delay in pressure drop with respect to throttle postion. This is mhy most map based system rely hevily on tps based enrichments.

I'm neither for nor agianst either. But I can tell you for sure that it is alot easier to get a result drivability wise using a MAF based system then it is with a MAP.

[paulr33]

you can certainly run airflow meters on large powered system, just get more, scale is sideways instead of up and down and you wont have an issue. if its a restrict fit a larger sized unit, or another unit.

map sensor will always be second rate

[mad082]

the emage can be bought with aditional harnesses, such as ignition and injector harnesses. one of the big things against it is that there are fewer people who can tune it. if money isn't that much of an issue go a power FC... unless they are no good for auto's. someone please confirm or correct me on this.

[Kaido_RR]

if your going to get the e-manage you might aswell spend the extra cash and get the ulimated

and if you play on running aftermarket injectors just buy the injector harness at the same time its only like an extra $40

[stocksy]

Do u guys know if the e-manage comes with software and some type of map for the skylines that u can upload into it??

[Kaido_RR]

  stocksy said:

Do u guys know if the e-manage comes with software and some type of map for the skylines that u can upload into it??

the e-manage comes with a usb plug and the software... also it is car base so therefore it would have a basemap for a skyline

[stocksy]

Ok now i have two decisions either e-manage or hydra ems... So wat power restrictions does a e-manage have?? e.g 250kw i really dont know

[paulr33]

if you are looking at spending that much, get the stock R33 remapped. it will be better and wont be unfriendly to the autobox

[stocksy]

any good places to get it re-mapped???