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some good options ...
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Posted by Kevin K [Email] (#374) [Profile/Gallery] (more from Kevin K) on Tue, 7 Aug 2001 20:35:20 Share Post by Email
In Reply to: Proper LH 2.2, heavy duty, Kevin K [Profile/Gallery] , Tue, 7 Aug 2001 10:55:49
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to improve EFI performance were posted:

a) chip, mabe from speedparts overseas

great concept, have chipped ecu in a non-saab track car. But yet to happen in US for C900(0) 2.2 LH. Daughter board may be req'd, and should be able to handle lambda function. Gregg, I think just 12% more fuel at wot would be good for moderate power increase, but this could also be had with a rrfpr. Better concept would be to provide chips for injector upgrades, big ones for big power. Jouko, DSM 2.0L's here do fine passing emmisions tests with 450 cc/min oem inj's .... not sure 5th inj is needed if a big inj'r chip is avail over there.

b) op-amp, stock ecu

this sounds like what the ARM1 does, mabe. been a while since I wrestled with kirkofs law keith. some BMW/toyota guys had better performance with the more tunable hks unit. But right idea for use with big inj'r.

c) 005 amm and real big inj's, stock ecu

sounds like this amm has same input and output voltage range as stock amm, and mabe double the flow capacity. mike may have best option here if stock amm goes outside accurate flow range at high hp levels.

d) simple add on resistor, stock ecu

seemed to work for kooch, may be valid for others, and diff R for diff inj's.

-> In each case, proper fueling should occur for all driving conditions, not just for a wot dyno run. The bigger inj's should allow more accurate high power fueling, avoiding saturation, if properly controlled.


posted by 63.10.1...

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