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Toymods » Tech & Conversions » 267 Deg Cams for my 4AGE, Wade Cams, Regarding ECU

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IRA11Y
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Re: 267 Deg Cams for my 4AGE, Wade Cams, Regarding ECU Sun, 17 October 2004 07:58 Go to previous messageGo to previous message
Quote:

he would be very suprized if i have to replace any shimms at all as most of the ones he has fitted it was just bolt the cams in and nothing else.


hahaha sounds like someone doesent know what they are measuring then Very Happy

If you use a billet cam ( not stellite reground ) then there is no way that you will use the ALL the original shims, there may be one or two within tolerance but there will more than likely be over a third of the shims out of spec. Even stellite regrinds will usually need some re-shimming.

As long as your not increasing the lift ( factory lift is about 7.4mm from memory, somebody please correct me?)then 260ish cams should run on the 100kw ecu, all larger than factory degree cams will affect idle and fuel mix to some degree unless you dyno the cams in to get the cleanest idle ( which may not neccesarily give you the best overall result in terms of your fuel map anyway ). The big port ECU should run as well.

Increasing injector size is really not the best way to go about fixing the lean out, and youd probhably get better results by using the temp sender mod to richen up the mix than trying to go to injectors that will deliver too much fuel over the whole range. Working out and then finding an injector size to suit the air/fuel mix over the whole factory map to a feasable rate will be niegh on impossible.. the best thing of course is to use an aftermarket programable ECU ( illegal in most states for a road car )

AFM systems will as mentioned be better at sorting out the fuelling issues, but most AFM 4AGE's were either import engines or out of MR2's here AFAIK

JDM or USDM computers although varying in mapping for things like emmisions and fuels wont really make a lot of difference to how the ecu reads air/fuel and therefore responds to larger cams.


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