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Location:
Melbourne - NthSubs
Registered:
January 2004
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 mpfi vs efi vs carb
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Wed, 14 January 2004 14:28
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hi
would any one the major difference between mpfi and efi?
ie. the proformance on stock or mods (air filters, turbo, etc.)
any one?
thanks
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: mpfi vs efi vs carb
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Wed, 14 January 2004 15:11
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mpfi is a type of efi
older efi cars, (mitsu starion for one) have single pont fuel injection. Later engines (1jz, for example) have 1 injector for each cylinder, 6 in total (multi-point fuel injection).
mpfi in general gives better control over fuel delivery... I'm not sure why you'd got for single point injection anymore
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Location:
Melbourne - NthSubs
Registered:
January 2004
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 Re: mpfi vs efi vs carb
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Wed, 14 January 2004 15:19
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so efi is like spfi oppose to mpfi
well that was simple enough  thanks
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Location:
Brisbane
Registered:
February 2003
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Re: mpfi vs efi vs carb
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Wed, 14 January 2004 15:29
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the real acronym comparison should have been
TBI (throttle body injection)
versus
MPI (multi-point injection)
note :MPI does allow you to use monster injectors - but with a loss in accuracy of fuel control. For big iron (e.g. ford/holden/chev V8s) you can also replace a carbi with a injection without modifying the manifold as most TBI units are the same size as 2 or 4 pot holley carbs.
charles.
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: mpfi vs efi vs carb
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Wed, 14 January 2004 15:50
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no, efi is the general term for any car not carbied 
it comes in spfi and mpfi flavours
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Location:
Melbourne - NthSubs
Registered:
January 2004
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Re: mpfi vs efi vs carb
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Fri, 16 January 2004 07:31
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 hmmmm
so efi is like also mpfi but can also be spfi?
so wat would be the difference between 4afe and 4age? which are efi and mpfi
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Location:
Campbelltown, NSW, Austra...
Registered:
January 2004
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Re: mpfi vs efi vs carb
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Fri, 16 January 2004 07:49
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um the number of fuel injectors??
What system does a 3s-fe use, i know its efi, but is it single or multi point?
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: mpfi vs efi vs carb
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Fri, 16 January 2004 08:12
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Pretty much all Toyota EFI setups are MPFI, back to the early 4ME's etc. I don't know of a SPFI Toyota.
Basically MPFI allows you to have smaller injectors and hence finer degrees of accuracy than say 2 huge injectors in...
SPFI which is essentially an electronic carby. Both of the EFI setups can be tuned for more accuracy than a carby in regards to overall drivability although a carby setup may match an EFI setup for peak power.
Some carbies have much better throttle response also, but this comes down to the way they operate and this can be matched by a properly designed intake manifold and/or individual throttle bodies.
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Location:
Melbourne - NthSubs
Registered:
January 2004
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Re: mpfi vs efi vs carb
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Fri, 16 January 2004 08:13
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4afe (AE95) is 16v like the 4age (AE86/AE82), and both are 1.6, some said the 4afe had 4 injectors, how about the 4age? the same or wat?
is 3sfe a celica engine? so it should be the same eh?
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: mpfi vs efi vs carb
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Fri, 16 January 2004 08:34
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LOL
this thread is funny..
you know that EFI means "electronic fuel injection"
MPI = Multi point injection
TBI = throttle body injection
c'mon, surely this is a shit stir?
otherwise, have a look at my sig. sorry to be blunt but you didn't even bother did you?
Cya, Stewart
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Location:
Melbourne - NthSubs
Registered:
January 2004
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Re: mpfi vs efi vs carb
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Fri, 16 January 2004 08:53
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im new to this stuff 
but can any1 tell me the difference between a 4afe (ae95) or a 4age (ae86) both 16v? if any
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Re: mpfi vs efi vs carb
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Fri, 16 January 2004 08:56
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"f" means narrow angled (economical) twin cam
"g" means wide angled (sports) twin cam
all this is explained in the "articles" section, under "toyota information", Toyota engine codes - Explains the mystery behind reading the engine codes of Toyota engines.
who would have guessed
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Location:
Melbourne - NthSubs
Registered:
January 2004
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Re: mpfi vs efi vs carb
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Fri, 16 January 2004 08:58
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do you know where i can have a look at a list of these engine codes?
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Location:
Melbourne - NthSubs
Registered:
January 2004
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Re: mpfi vs efi vs carb
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Fri, 16 January 2004 08:59
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there one on this website
thanks for the help anyway guys
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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I supported Toymods
Location:
Epping, Sydney
Registered:
May 2002
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Location:
Melbourne - NthSubs
Registered:
January 2004
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Re: mpfi vs efi vs carb
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Fri, 16 January 2004 09:19
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with google you have to look at all these pages that are irrelevant
with forums u can ask ppl who know about this kinda stuff
but i understand now
thanks again ppl
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Location:
Campbelltown, NSW, Austra...
Registered:
January 2004
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Re: mpfi vs efi vs carb
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Fri, 16 January 2004 09:29
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Yeah but you don't get the same human interaction, its about the social factor.
That or im too lazy
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: mpfi vs efi vs carb
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Fri, 16 January 2004 09:56
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| Camry_omega wrote on Fri, 16 January 2004 20:29 |
Yeah but you don't get the same human interaction, its about the social factor.
That or im too lazy
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you'd be amazed how muchbetter social interactions are on forums when people actually do a bit of research beforehand...
unless of course you have the idea that "any attention is good attention"
lazy ppl don't get many forum favours..... nor should they....
Cya, Stewart
ps, wonder how i got my sig?? so i had to type less, but it doesn't seem to be working 
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Location:
Melbourne - NthSubs
Registered:
January 2004
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Re: mpfi vs efi vs carb
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Fri, 16 January 2004 09:59
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well i did start on google/yahoo but didnt find wat i was looking for
thus this thread
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Location:
Melbourne
Registered:
November 2003
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Re: mpfi vs efi vs carb
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Fri, 16 January 2004 12:44
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I thought Throttle Body Electronic fuel injection was just a weak ass bolt on replacement for a carby, that was very quickly surpassed by Multi-point fuel injection for response, price and fuel economy. As far as I know anyway.
How many examples of TBEFI are there? I don't know of ANY cars that have them.
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: mpfi vs efi vs carb
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Fri, 16 January 2004 13:01
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camira
US V8 thingos.
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Location:
Brisbane
Registered:
February 2003
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Re: mpfi vs efi vs carb
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Fri, 16 January 2004 13:04
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early mitsu i think - cordia for sure (factory turbo anyway)
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Location:
Campbelltown, NSW, Austra...
Registered:
January 2004
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: mpfi vs efi vs carb
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Fri, 16 January 2004 23:32
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Woohoo!!! well done 
howstuffworks is usually the second redirection amazing the amount of stuff they have there
often my first port of call for finding out.... how stuff works...!
yayy for searching
Cya, Stewart
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Location:
Campbelltown, NSW, Austra...
Registered:
January 2004
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Re: mpfi vs efi vs carb
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Fri, 16 January 2004 23:39
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No problems.
the website really came in handy last year esp. with engineering studies.
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Location:
Brisbane
Registered:
February 2003
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Re: mpfi vs efi vs carb
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Sat, 17 January 2004 01:53
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| Camry_omega wrote on Sat, 17 January 2004 09:39 |
No problems.
the website really came in handy last year esp. with engineering studies.
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so you can get around the handicaps of incoherent (both intellectually and spoken) lecturers and course designers who want you to buy their $130 book ...
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Location:
Campbelltown, NSW, Austra...
Registered:
January 2004
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Re: mpfi vs efi vs carb
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Sat, 17 January 2004 02:04
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mainly because the teacher i had spoke in a monotone and i kept falling asleep.
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Location:
Finland
Registered:
November 2002
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Re: mpfi vs efi vs carb
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Sat, 17 January 2004 02:20
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I don't know of a SPFI Toyota.
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1S-i is SPFI. It's only toyota engine that uses SPFI, that Im aware of. Another one of a kind feature is that it also has oil pressure adjuster things between cam and valve.
Whatta sad engine it is. 
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