did search and found out only very few people using it so i didn't find any answer to my questions.

i can't afford standalone systems like hondata, aem ems and etc. so i'm choosing between e-manage and vafc hack but from what i've been reading, e-manage is better than the vafc hack.

so here are my questions:
1.) do i need to change my stock injectors when using e-manage? on vafc hack, it uses 450cc injectors. is it better to change injectors?

2.) from search, some people mentioned that the max injectors it can control is 30% from stock or 370cc but from the pic(below) it states that it can control up to 150% larger than stock. so is the 370cc info wrong?

3.) i was told that you need the ignition harness(sold seperately) to adjust ignition timing, so does that mean without that harness i won't be able to adjust timing at all?

4.) same thing with the injector harness(sold seperately) does it mean that i can't use any bigger injectors without the injector harness, i read the manual and it said the injector harness is used to control main injectors or sub-injectors? does main injector means the stock injector and without the harness you can't control injectors?

5.) there's also the pressure sensor and harness, do i need them?

i hope you guys especially those who are using the e-manage on their turbocharged cars. by the way the car is 99 SiR boosting at 9psi.

any help will be very much appreciated.




[Modified by _Endless_, 5:13 AM 1/2/2003]

 

I haven't read up on the e-manage in a long time, I cant remember if the features on that pic are the e-manages basic funtions or if it's the advanced functions you get with their software.

But as far as running the VAFC hack have you come up with a list of what all you will need to get this to work properly?

When you get the AEM EMS there are a few things that you wont need to buy. For example a boost controller and BTM (not sure about the BTM). But just compare the price of all the components you would need to run the hack or e-manage and compare that price and the features you have with the price of an AEM EMS and the features you get with the EMS.

 

You do not have to upgrade your injectors, but its very handy in turbo applications usually. You do need the seperate harnesses to utilize the other features, but they aren't that costly. I think you only need the pressure sensor if your going to exceed the limitations of your stock MAP sensor, but I could be wrong. Hope that helps some....

 

I believe Avatar on this board used the e-Manage on his car. you might want to contact him and he might be able to answer your questions.

 

I would recommend going with bigger injectors, most hondas typically run their injectors at very high duty cycles (90+%). With a standalone (or piggyback) you wont be able to raise the duty cycle much more to give you enough fuel when boosting. Go with a decent sized injector that will allow you to run them at a conservative duty cycle.

Stock injectors are usually ok for low boost and by raising the fuel pressure to add more fuel (RRFPR).

 

what size injectors are the correct ones when using standalone or "piggy" back system? are 450cc too big?

 

You can go with any size injector that meets your HP goal with a standalone. And as long as you aren't running the injectors at really high duty cycles you are fine too.

Here is something I posted up on po.com a while back, it tells us what the various HP limit is for a injector size. The HP numbers are for stock fuel pressure, and 100% injector duty cycle, I suspect that they are a bit off so dont use it as a solution to your problem. I would still take the injector size and ask around to see if they are the right size.

EDIT: by raising the fuel pressure you can get more fuel from the injectors, and remember since the HP numbers are for 100% duty cycle, you should select the next highest sized injector for you HP goal.


270cc = 187 HP
310cc = 214 HP
320cc = 220 HP
370cc = 256 HP
400cc = 277 HP
440cc = 304 HP
450cc = 311 HP
500cc = 346 HP
550cc = 380 HP
600cc = 415 HP
650cc = 450 HP
800cc = 554 HP
880cc = 609 HP



[Modified by BlueShadow, 7:09 AM 1/2/2003]

 

Good Info. Is that Wheel HP?

 

Yes they are in WHP (BHP actually), but they are only estimates. And those HP numbers are if the injectors are run at 100% duty cycle at about 40 PSI fuel pressure.

It's all in Maximum Boost, here is the formula:

[(expected BHP x 0.55) / number of injectors] * 10.5 = CC size of injector

EDIT: and I just wanted to repeat my disclaimer that you should not use my numbers as a sole guide to selecting injector sizes.


[Modified by BlueShadow, 2:58 PM 1/2/2003]