Anyone In the D/M/V good with 1jz's?
11-11-08 | 04:24 PM
#1
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Driver School Candidate
Joined: Jun 2008
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From: Northern Virginia/DC
Anyone In the D/M/V good with 1jz's?
This Saturday Im going to be swapping out injectors on my 1jz and attempting to highway tune, anyone in the area with experience? Funds if needed.
11-12-08 | 04:59 PM
#3
11-13-08 | 12:23 PM
#5
if you are just swapping out injectors you shouldn't have to tune very much.
It will most likely be a map adjustment based on the percentage difference.
so lets say you are going from stock 380cc injectors on a 1jz to 440cc
you would have to cut out (1 - (380/440)) = (1 - .86) = 0.14 or 14% fuel across the whole map. an safc or similar tuning device can do this very easily. or you can adjust the duration of the injector pulsewidths if you have an advanced tuning device.. not 100% sure about the latter.
It will most likely be a map adjustment based on the percentage difference.
so lets say you are going from stock 380cc injectors on a 1jz to 440cc
you would have to cut out (1 - (380/440)) = (1 - .86) = 0.14 or 14% fuel across the whole map. an safc or similar tuning device can do this very easily. or you can adjust the duration of the injector pulsewidths if you have an advanced tuning device.. not 100% sure about the latter.
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