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Can anyone properly explain the SI Drive system to me?i'm trying to figure out how come legacies equipped with it run past the older models (06) which don't have it, since its just supposed to be a throttle controller:s

si drive come with a vf44 turbo where az non si drive comes with vf38 which is smaller. also aside from different throttle inputs it has two mappings so the sport is alot more aggressive than the non si drive .

OOHHHHHH....alot clearer now..tnx much!!

So is it safe to assume that the Si drive equipped leggy comes with more boost than the regular leggy??if so how much boost stock?

nt sure abt si drive but auto non si comes with 14.5 psi normal/sport and 8 psi eco

swordsman wrote:Can anyone properly explain the SI Drive system to me?i'm trying to figure out how come legacies equipped with it run past the older models (06) which don't have it, since its just supposed to be a throttle controller:s

First time I've heard that.
It is a throttle map.
The non SI drive LGT has economy/ sport
SI drive one has economy/ sport / sport sharp

Same max output.
Sport sharp is the same except you get full throttle with just a light press of the accelerator.

Civic 2nr wrote:nt sure abt si drive but auto non si comes with 14.5 psi normal/sport and 8 psi eco

How's the EJ207?

So the attached graph shows the engine response with each drive option selected...is it safe to assume that the non
Si Drives run the same way (in terms of engine output in S#) as those equipped with the Si drive??

Throttle maps on non si drive cars can be adjusted to give about 30% more response.

^ no definitions for the 6MT ECU yet

i'm considering going with a piggy back...

Make a request and hope for the best.Not sure a piggy back is the right way to go,get a standalone instead.

i did make a request...

been some months, they have started to work on it but cannot give me a timeframe

my tuner (ecutek) tld me that the si drives have two maps to tune as opposed to one map on my legacy. the 207 wokin besss!!!

^^^Hmmm unless you have a USDM model your car has two maps...

^ thats what i know...

A & B