A newbie (to SP) question on ECU and manifold air pressure sensor for boost:
15.1.D. Alternate computer control modules may be used whenever an
equivalent change to the conventional system is allowed. For
example, alternate computer module control of ignition settings
or fuel injection is allowed.
15.10.C.1. Carburetors, fuel injection, and intake manifolds are unrestricted.
15.10.C.4.f) Boost regulation systems, either electronic or mechanical,
and electronic fuel cuts referencing boost pressure may be
altered or modified except as prohibited herein. Boost
pressure changes resulting from authorized changes are
permitted.
So, the ECU is covered by both the fuel injection and boost regulation
system (can be replaced with programmable fuel map, etc.).
Would changing the MAP sensor be legit? This is a(nother) weak link, since
reaching it's accuracy limit is too easy. Seems like it would be legal
to me, but I want to make sure because I've already experienced
14-15psi boost and fuel-cut as a result!
Not that I intend to exceed 15psi with a stock twins/fuel regulator/etc. setup, but I'm uncomfortable running close
to it knowing the stock MAP sensor is no longer accurate in that range. My safety option is to make sure the fuel map is exceedingly rich anywhere that might be over 15psi and sleep well knowing there is a good buffer if it overboosts.
Dan
124 ST[S|X] - '89 Civic Si (red or white, depending)
24 HS - '89 Civic Si white
95 ASP - '95 RX-7 R2 (for fun days)