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Discussion Starter · #1 ·
Hey guys,
In looking through the old posts I still have not been able to draw any real conclusion about what is needed. I have a 1985 chassis with an 84 5m w/ 84 ecu. i have just purchased an s-afcII. What is needed to hook this up and be able to tune it correctly? Do I need an 85 ecm, intake w/tps, and an 85 wiring harness? or do I need to get that boost sensor from a mk3? Tell me what I need to do and if any one who reads this post has the parts that I need, I will buy them if you have extras! Any suggestions will be greatly appreciated. :ugh:

Thnaks in advance,
Mike Rapp
 

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Discussion Starter · #3 ·
Hey guys,
Sorry for the lack of information. I do have an 85 5mgte. I am looking to replace the fcon, which I used for my 295s, and go with the SAFCII so I can use the 440s I installed. After all the funny replies I have read lately I guess I kinda feel like a :dumbass:

I just need to know what to do with the 84 5mge vs the 85 5mge to get this thing to work.

Thnaks in advance,
Mike Rapp
1985 5mgte HKS Turbo kit
 

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WadeT said:
What's a boost sensor from a MKIII?


The little black box,located on the injector resistor,that tells the boost gauge what to say :lol: We don't use them.
 

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Junkie said:
WadeT said:
What's a boost sensor from a MKIII?


The little black box,located on the injector resistor,that tells the boost gauge what to say :lol: We don't use them.
Ahhhh.. I thought those MKIII boost gauges were manual/electronic... Shows how much I know about those cars, lol :oops:
 

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Wade & Shawn,

Mike in Atlanta is running an old HKS Turbo system. Thus the usage for a S-AFC. Possible that he has a old mechanical boost guage (if such a thing), unless he's upgraded...
 

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there was a thread not too long ago about hooking up a map sensor to the safc instead of the tps for lo/hi settings. it might be worth looking into even though you have a later style TPS. given the fueling situations 5/6m-gtes with 295s face, it makes more sense to have boost settings/off-boost settings, though throttle position probably isnt a bad rough estimation of being on/off boost.

also, you could set the afc up so it wasn't just in terms of boost settings/off bost settings. if you don't have the same high throttle setting as low throttle setting, the afc interpolates to find settings at positions in between. like, if high throttle is 60% and low throttle is 0%, values between 0% and 60% will be a linear interp. based on the high and low settings.

so you could get it to linearly add fuel with increasing pressure from vacuum to boost. vacuum settings and high boost settings will have to be kind of have to be in appropriate ranges, but if they are, with so many different RPM bins in the map, and with good luck playing with the numbers, there's a chance you could get away with tightening the AFM spring a lot less. it might be worth trying

you can get 2 bar map sensors made for underhood mounting from GM turbo cars, dodge turbo cars-- check ebay for some cheap ones, and maybe get a connector at a yard.

or if you prefer mounting them inside, the motorola units that were mentioned in that earlier thread might be nice too. they're available from any electronics supplier and are really tiny.

someone should try this it would be really cool if it worked out without increasing the spring tension so much

also, are people having any sorts of part-throttle-boost, deceleration, idle, annoyances with 295s and an afc? if so fiddling with the map sensor could help with that as well

shiva
 
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