bonus_2000 Posted February 5, 2006 Share Posted February 5, 2006 Hi All, I have purchased a while back a set of the 550cc injectors, and then went to Mr Toyota and purchased the resistor pack also. I want to install these, but want to know if this is a simple installation job, or whether I need to get some form of after-market management to increase the fueling i.e. Apexi SAFC? Any information would be good, as I have read the guide to installing these on the jap spec car, but it doesn't seem to mention anything like this from what I can remember. Cheers Guys. Link to comment Share on other sites More sharing options...
adi2009 Posted February 5, 2006 Share Posted February 5, 2006 You do have to install an Apexi SAFC atleast to trim down the fuelling. It will also have to be done using a Wideband O2 sensor. Link to comment Share on other sites More sharing options...
paul mac Posted February 5, 2006 Share Posted February 5, 2006 its pretty straight foward you will have to trim down the locating lugs on the plugs with a good set of cutters and thats about all i can remember on the subject so nothing to worry about Link to comment Share on other sites More sharing options...
Guest **BETSY** Posted February 5, 2006 Share Posted February 5, 2006 Hi, are the 440cc inj low impedence and the 550 high impedence? Link to comment Share on other sites More sharing options...
Kopite Posted February 5, 2006 Share Posted February 5, 2006 440s are high impedence, 550 low Link to comment Share on other sites More sharing options...
INDYPWR Posted February 6, 2006 Share Posted February 6, 2006 what is your purpose of installing the 550's? did you swap to usdm twins? Link to comment Share on other sites More sharing options...
bonus_2000 Posted February 7, 2006 Author Share Posted February 7, 2006 what is your purpose of installing the 550's? did you swap to usdm twins? A friend advised me to get a set, for when I want to increase from the standard boost. I bought a complete uk turbo setup also, because heard they were more durable than the jap spec ones because of the steel blades. Was aiming to do something with all this at some point, but would like people to point me in the right direction. Link to comment Share on other sites More sharing options...
JohnA Posted February 7, 2006 Share Posted February 7, 2006 The right direction is to keep the car as it is, if you have no troubles with it - and try to refrain from breaking it. (limiting yourself to 1.0 ~ 1.1bar is a good start) There is no immediate reason to swap the turbos or fit the injectors (the 440s run out of puff at boost levels where the stock turbos shouldn't be operating in the first place) Link to comment Share on other sites More sharing options...
bonus_2000 Posted February 7, 2006 Author Share Posted February 7, 2006 The right direction is to keep the car as it is, if you have no troubles with it - and try to refrain from breaking it. (limiting yourself to 1.0 ~ 1.1bar is a good start) There is no immediate reason to swap the turbos or fit the injectors (the 440s run out of puff at boost levels where the stock turbos shouldn't be operating in the first place) Ah OK. I originally bought the other turbo setup because I though mine were passing a bit of oil, seems not to be the case now. The ones I bought had just been reconditioned (so probably better than the ones on the car - 90k?), and a friend told me that the UK ones being steel bladed would handle more boost, but also when doing it I would need to upgrade the injectors/fueling too? Link to comment Share on other sites More sharing options...
JohnA Posted February 7, 2006 Share Posted February 7, 2006 The UK ones are steel-based, yes, and they can indeed handle a bit more boost. They can't run .5 or 1 bar more though, the difference is marginal. So that doesn't outweigh the mess of swapping and the aggro from the bits that don't fit exactly afterwards. If your turbos are not in need of reconditioning, just leave them alone and avoid going over 1.1bar max. The 550cc injectors are overkill for such a setup, I run a bit more power and still need to have them trimmed down (by 30% at some points!) That way you'll avoid all the mess with trying to make the JSpec ECU work with injectors it was never meant to work with. The KISS principle: Keep It Short and Simple Link to comment Share on other sites More sharing options...
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