this is gonna sound really stupid but i kinda wanna know the difference between them lol and i wanna know whether my 91 crx si is dpfi or mpfi and when i drop my ls does it change lol....
and yes i know its a stupid question, but noone has ever explained it to me

 

first of all dpfi only has 2 injectors, and they just spray gas and each cylinder takes what is needed, mpfi has 4 injectors 1 for every cylinder. if you have a 91 si then most you will have mpfi unless they have swapped engines to an hf d15b2 . it should say what it is right on the intake manifold also check how mayny injectors you have. mpfi is better for tuning because you can adjust how much fuel is going into each cylinder since each injector is specifically for that cylinder. but dual piont is also good cause its a carbeaurator and it atomizes the fuel particles better.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 19REX89 &raquo;</TD></TR><TR><TD CLASS="quote">unless they have swapped engines to an hf d15b2</TD></TR></TABLE>

HFs were MPFI, it was the DX that was DPFI.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 19REX89 &raquo;</TD></TR><TR><TD CLASS="quote">its a carbeaurator and it atomizes the fuel particles better.</TD></TR></TABLE>

It's not really a carb, and as far as being good... It's arguably better for fuel economy, but an Si can get 45mpg+ and still make more power, so I'm not 100% sold on which is actually better.

 

bump

 

If it is DPFI,
Dual-point fuel injection will have a throttle body
with two injectors like this:


If it is MPFI &gt;Multi-port fuel injection looks like this:

The stamp in the red circled area will tell you what engine it is..

 

MPFI = Muli-port Fuel Injection found int 85 to current CRX/Civic's Si's (88-91 HF models were also MPFI).

DPFI = Dual-Point Fuel Injection found in 88-91 CRX/Civic's DX and Standard models

87 and older CRX/Civic's that were not Si models WERE carburated!!


MPFI has 4 fuel injectors that are at the end of the intake manifold directly at the intake ports.

DPFI has 2 fuel injectors this is similar to TBI (throttle body Injection) you have a primary and a secondary. They atomize

what other questions do you have?



Modified by vtecn8ive at 2:13 PM 10/31/2005

 

DPFI = Dual-Point Fuel Injection found in 88-91 CRX/Civic's DX and Standard models

 

I accidentaly put port instead of point.

 

How many people have to chime in here and say the same thing over and over? Did anyone scroll down to see if anyone else answered the topic already?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Lynx Bus Type R &raquo;</TD></TR><TR><TD CLASS="quote">How many people have to chime in here and say the same thing over and over? Did anyone scroll down to see if anyone else answered the topic already? </TD></TR></TABLE>


At least we are helping rather then offer no help. Like you.

 

oh w3rd? My bad home boy. It is very annoying to come in here to learn a little something, and to have the thread cluttered with half the replies the same thing. Like a good song on the radio that get played tice per hour every hour. I didnt know redative broken records were helpful. As you like homedawg, VTEC y0!

Lookie lookie im a know it all and since i saw 3 other people post the exact same thing i think i'll do the same so i can be cool and bump my thread count.

 

After it was explained the guy still said 'bump' if you didn't notice.

I was typing it while 88DXCRX was posting. So I never knew.

Dude you are the gayness of H-T. people try to help others out and your the stupid a$$ that comes in with his stupid inputs.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vtecn8ive &raquo;</TD></TR><TR><TD CLASS="quote">I was typing it while 88DXCRX was posting. So I never knew.</TD></TR></TABLE>

Yeah, if you look at the time of the posts, you can see he was typing at the same time the other one was being posted. ***. So thank YOU for making worthless posts, cluttering up the thread.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Lynx Bus Type R &raquo;</TD></TR><TR><TD CLASS="quote">How many people have to chime in here and say the same thing over and over? Did anyone scroll down to see if anyone else answered the topic already? </TD></TR></TABLE><TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Lynx Bus Type R &raquo;</TD></TR><TR><TD CLASS="quote">oh w3rd? My bad home boy. It is very annoying to come in here to learn a little something, and to have the thread cluttered with half the replies the same thing. Like a good song on the radio that get played tice per hour every hour. I didnt know redative broken records were helpful. As you like homedawg, VTEC y0!

Lookie lookie im a know it all and since i saw 3 other people post the exact same thing i think i'll do the same so i can be cool and bump my thread count. </TD></TR></TABLE>

Nice myspace http://www.myspace.com/kidnkorner

So should we call you captain huggybear? Or just captain obvious?

 

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

Nice myspace http://www.myspace.com/kidnkorner

So should we call you captain huggybear? Or just captain obvious?

</TD></TR></TABLE>

Thanks for the compliment, the women that I go out with really like my myspace profile . Sure you can call me Huggy Bear, it was my user name before the one i have now.

I can see weather It be good or bad H-T is not the place to be voicing ones opinion.

Is it me, or am I the only one that noticed that "I" didn't single anyone out. hmmm......

 

[QUOTE=Lynx Bus Type R]

I can see weather It be good or bad H-T is not the place to be voicing ones opinion.

<U>Is it me, or am I the only one that noticed that "I" didn't single anyone out. hmmm......[/</U>QUOTE]

weather? or whether? eh

Dude you are the person that got this topic off topic. Hey real gay guys wear pink. Keep it real home boy.

-Shane (the first time I'm disappointed to have the same name as someone else)

And I can't believe you are proud to meet women on the internet. LMAO

 

 

Everything but this was good information..
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Lynx Bus Type R &raquo;</TD></TR><TR><TD CLASS="quote">How many people have to chime in here and say the same thing over and over? Did anyone scroll down to see if anyone else answered the topic already? </TD></TR></TABLE>

 

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

So you're going to come into someone elses thread, expletive it all up with whining and complaining, and then want it locked? Let it go.

 

multi port runs off of 4 injectors were as the dual point is kinda of a carb turned into fuel injection but just off of 2 insted of 4