350 HP Potential for CIS

[JShadzi at aol.com]

In a message dated 9/12/00 3:40:49 PM Pacific Daylight Time, 
wlockwoo at zoo.uvm.edu writes:

<< I have read different posts that indicate the Ned Ritchie says that CIS is
 good for about 350 hp in a MAC-11 engine.  What are the necessary steps to
 building one of these 350 hp engines?  How did the rally cars using the
 10v head get 400 hp?  What injection did they
 use?  Graydon? Scott? Igor? What do you guys know about this?
 
 If I left you out I didn't mean to...
  >>

    The race cars used EFI, some 2 injectors per cylinder.  You will be hard 
pressed to push an I5 to 350 hp without seriously freeing up air restrictions 
as Todd mentioned earlier.  I believe it would at minimum require a custom 
free flowing header to start with, as well as a larger, single pass IC.  Gary 
K would know about pushing CIS to its limits, but if I remember correctly he 
said about 260 was the limit for him (Gary?)
    If you did a serious port job on the head and manifold, went to bigger 
intake valves (I measured a TransAm head at Eurospec, it had 41mm/36mm 
valves), did a custom exh. manifold, a larger turbo such as RS2 or 
turbonetics, and went to an after market EFI system you could get rid of that 
darn fuel dist all together.  Plus, by removing fuel dist. it will make room 
for a bigger turbo and manifold.  Lastly, a 4" exhaust thru the firewall past 
the passenger seat out the side door to finish it up (that last one optional  
;)
    I am currently involved with a few projects converting to EFI, definitely 
the way to go, that dist. is nothing but trouble!  HTH,
Javad