Chipped MAC-14 Interest?

[GTJeff]

I'm wondering how many of you might be interested in a 2.5 bar chipset for the MAC-14. I have a "beta" version running in my car since Saturday. I replaced the ECU's 2 bar pressure transducer with a 2.5 bar unit. Programming wise, I have rescaled the timing maps, overboost fuel cut map, and N75 boost control, and I have made some tweaks to the enrichment tables. So far I am running 16 psi to redline with momentary overboost to 18ish psi with N75 boost control. So far it is working really well but my eventual goal is for N75 control to 20ish psi (with maybe 22 psi momentary overboost) then tapering to around 16 psi at redline.

If I were to offer this chipset it would be with instructions that the fuel pump must be relayed, the FPR vent must be rerouted to manifold pressure reference, maybe some other fuel system adjustments, and a 1.8 bar wastegate spring should be installed.

I would need to replace my K26 with a K24 and also test it in warmer weather to make sure my timing values are ok.

Let me know what you think and if you might be interested in a badass chipset for your lowly MC2 20vt a few months down the road.

[my2000apb]

dave de80q has been hunting for one

[DE80q]

Interesting.... very interesting... pm me with some details. I think I would be interested in this.

[quattro]

Id be down for one

[GTJeff]

Thanks for the replys.

I have been making some good progress with the MAC-14 tuning. I made some corrections to the MAP axes for the fuel enrichment tables. This is a separate set of axes from the timing tables which I had previously rescaled. Also, an issue I noticed is at part throttle the the ecu would stay in closed loop mode up til about 10 psi of boost pressure. 14.7 AFR at 10 psi is not so good. After examining the program I believe I figured out which map controls the switching point and I made some adjustments. After driving it around quite a bit yesterday it appears that my adjustments are working and the mixure is now richening up after about 5 psi of boost pressure.

Also the boost gauge is hitting more like 19 psi overboost and then it settles down to 16 to 17 psi which is pretty damn fun which is the main reason that I am doing this. Again, if I offer this for sale it won't be for a couple of months but I would like to know if you are interested.

Jeff

[MHCAudi200t]

Thanks for the replys.

I have been making some good progress with the MAC-14 tuning. I made some corrections to the MAP axes for the fuel enrichment tables. This is a separate set of axes from the timing tables which I had previously rescaled. Also, an issue I noticed is at part throttle the the ecu would stay in closed loop mode up til about 10 psi of boost pressure. 14.7 AFR at 10 psi is not so good. After examining the program I believe I figured out which map controls the switching point and I made some adjustments. After driving it around quite a bit yesterday it appears that my adjustments are working and the mixure is now richening up after about 5 psi of boost pressure.



Also the boost gauge is hitting more like 19 psi overboost and then it settles down to 16 to 17 psi which is pretty damn fun which is the main reason that I am doing this. Again, if I offer this for sale it won't be for a couple of months but I would like to know if you are interested.

Jeff

I would be intrested in something like that. Pm me details and im in!

[Wilford Brimley]

Is this modified MAC-11 code from the MG user seiche? If you have his -11 code I may be interested in it, depending on what the timing values are at higher boost (1.8 to 2.5 bar range)

[GTJeff]

The tuning is mine. Most of what I learned is from an ecuconnections.com thread for the MAC-11, 12. Huge help though from another person who hooked me up with the patch to blink the CEL when pinging is sensed.

[MHCAudi200t]

Jeff does good work. I picked up a 2.0 bar chip for my 200. He was very helpful! He even installed the chip and socket. Took the time to make sure it was reliable at the altitude i am at. Car really came to life with the chip! Have not had any issues, i would recommend his work!

[Wilford Brimley]

Since this is all custom tunes via ostrich, is there a way to give you the timing figures we want for a base tune?

Any rough estimates on cost?

[GTJeff]

If you send me the values that you want I could burn them onto a chip for you. Send me a PM with what you want and I'll let you know about pricing.

[Audiquattroturbo]

Need one of these chips bad!!!! My mc2 is painfully slow.