[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Carbs? (was'85 Coupe GT engine swap)

<<< While that sounds cool, practically speaking, what advantages would such a
 solution provide?  Does it ensure more even breathing between the cylinders?
 Quicker throttle response?  Greater maximum HP?

    Well, there are many reasons why EFI is better than carb. and CIS, if 
there were not it would not be the universal choice for supplying fuel to 
motors these days.  First of all, all Eurospec products are designed for 
"racing" only.  Would I recommend this system for someone driving a mildly 
tuned street car?  No.  But for a race motor capable of over 200hp, CIS is 
going to be very untunable and have difficulty supplying enough fuel.  With 
EFI, incremental adjustments to fuel can be made from idle to redline, 
specific to each rpm need.  This is where EFI really shines with turbo 
applications.  Typically, many racers try to enrichen fuel mixture and high 
rpm by using the mixture screw to enrichen the mixture, but this is a linear 
system so idle and low rpms will run very rich.  There are many problems with 
being too rich, washing the cylinder walls being a big one.  
    Also, all tuning comprises is plugging in your computer and making the 
appropriate adjustments.  With individual butterflies for each cylinder, air 
flow is not a problem, nor are poor flowing intake runners/pleniums that do 
not distribute proper air to each cylinder.  Also, fuel efficiency, 
emissions, throttle response are all advantages that exceed carbueration and 
    A wonderful application would be a 20v I5 in a turbo application.  Boost 
would a matter of adjusting the proper parameters and increasing power.  No 
messing around with fuel enrichment devices or overboost protection.  
    Of course, this all really applies to racing applications, but could 
definitely work in a street car too.