i have some spare injectors a green one and a brown one form the d15b2 and was wondering if i can hook it up to the intake pipe or the black air chamber to a WOT switch. problem is where can i get the fuel from? this will be done on the d15b2. the green injector is the primary injector so is it bigger then the brown one?

 

what for? if you want power... that wont do it. it will just make the engine run rich

 

So if my a/f ratio is 16-1 and i add more fuel say making it 13-1 i will not gain power. sorry but you don't know what your taking about. whats the point of a mpfi swap then? i am just looking for some easy power on my daily while i build up my turbo d fund.
maybe someone else that know what there talking about can help me.

 

for you to have more power by injecting more fuel you would need more air to go into the engine. If you just throw more fuel in as was mentioned before you will just run rich and probably lose power. Nitrous works in a way where you are injecting more fuel and more oxygen into the engine therefore giving you more power for a short time. Same for a turbo or supercharger.

That being said in any of those cases you need something to manage the fuel and air going in so that it is safe for your engine and actually makes power.

MPFI has a much better intake manfold design and better fuel management that is roughly why it makes more power then a dpfi

do some reasearch read some threads on here and learn.

For cheap speed you could do a vtec head swap and mpfi swap. it would give you some gains but the d15b2 won't give you that much unless you really want to spend some money on it

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SFlCrx &raquo;</TD></TR><TR><TD CLASS="quote">So if my a/f ratio is 16-1 and i add more fuel say making it 13-1 i will not gain power. sorry but you don't know what your taking about. whats the point of a mpfi swap then? i am just looking for some easy power on my daily while i build up my turbo d fund.
maybe someone else that know what there talking about can help me. </TD></TR></TABLE>

the point of the mpfi swap is to put an injector in each cylinder.. gives about the same amount of fuel as dpfi . only difference is the dpfi sprays the fuel in the chamber and mixes with the air before going in to the combustion chamber, mpfi mixes in the combustion chamber. mpfi only give a little more fuel if any more then dpfi.. but i could be wrong.. anyone can correct me.

id think adding more fuel injectors in a dpfi is a waste of time and is pretty stupid. you cant get enough air to mix with the extra fuel.

oh and if you goign to turbo later on your going to use mpfi anyways.....at least i hope you do.

 

The main reason they make more power is cause u switch computers. If you did an MPFI swap and kept the stock computer it wouldn't work, right?

Just the same, if you keep the stock computer and just add a bunch more fuel it's not gonna be ready for it. You'll get all this extra fuel with no timing adjustment or no air to compensate for it.

It'd be like running a wet shot of nitrous with the nitrous soldenoid unhooked. Just plain stupid.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by janz3n &raquo;</TD></TR><TR><TD CLASS="quote">

only difference is the dpfi sprays the fuel in the chamber and mixes with the air before going in to the combustion chamber, mpfi mixes in the combustion chamber. </TD></TR></TABLE>

I do believe the injectors are still in the intake runner just ahead of the intake valves. They don't directly inject into the cylinder.

 

save up and just get a SI mani

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SupraRXZ &raquo;</TD></TR><TR><TD CLASS="quote">save up and just get a SI mani</TD></TR></TABLE>

with injectors, a PM6, resistor box. Anything else?

 

^ An Si dizzy. Not to mention the wiring.

 

lean is mean, extra fuel for no reason is just a waste of time, money and bandwidth

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Perfectionist &raquo;</TD></TR><TR><TD CLASS="quote">

I do believe the injectors are still in the intake runner just ahead of the intake valves. They don't directly inject into the cylinder.</TD></TR></TABLE>

ya your right.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boosted Chemist &raquo;</TD></TR><TR><TD CLASS="quote">lean is mean, extra fuel for no reason is just a waste of time, money and bandwidth</TD></TR></TABLE>

90% of H-T is a waste of bandwidth.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tippyman &raquo;</TD></TR><TR><TD CLASS="quote">

99.99999999999999999999999% of H-T is a waste of bandwidth.</TD></TR></TABLE>

fixed lol

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boosted Chemist &raquo;</TD></TR><TR><TD CLASS="quote">

fixed lol</TD></TR></TABLE>

Fairly accurate I would say...

 

i understand how mpfi works and nitious and i know what a mini me swap is and i appreciate the comments, like i said i was just looking for some extra power form some of the things i have just laying around. i dnyoed my car at school and i had an a/f ratio of 16.4-1 but i still made 83 hp and 85 torque out of the d15b2. To my knowledge best torque/ power is made between 12-1 and 13.5-1. correct me if i'm wrong.

 

doing anything to dpfi is a waste of time and money.. just put on a mpfi intake and be done with it.

 

LOL, how about you tune it then and not just add more injectors.......

And since its only a DPFI its difficult to tune. Do a MPFI swap and its easy to tune. Or you can always slap on an AFC. Theres pleantly of things to do b4 you add more injectors.

Just think of what your asking, think before you speak, and if you dont ask stupid questions you wont get stupid answers. And last but not least, is all this worth it for a stupid DPFI engine. You can seriously go to a junk yard and get an A6 IM for cheap and PM6 and a little wiring and do it the right way.

Also if you tune to 12:1 you will loose power, usually the leaner the more power until a point.