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Magna mpi finally! Iat correction?


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#1 boostinmini

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Posted 09 April 2019 - 05:55 PM

Hey guys, got my magna running!  So awesome, ms1 v2.2 edis water meth, had a decent base tune going with approx 11.5 afr under boost, now today a bit warmer out, it was very lean under boost, approx 13afr..

Any ideas?

http://www.mez.co.uk/ms15-new.html

This sounds like my problem





#2 psu_Crash

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Posted 09 April 2019 - 07:25 PM

I ran mine initially without an IAT sensor hooked up. Once I did it was undrivable. It will make predictable changes, but your tune will need significant changes. Shoot me a PM with your email and I can send over a copy of my current tune to give you an idea
'86 Starion, MPI with MS2extra, Ebay To4E 57 Trim (in testing), P&P head, OS SS Valves, Wiseco +.030, ARP head/rod, RPW Roller Cam, Crower Rods,AEM H2O/Meth Injection, Mighty Max CAS 4 Direct Fire Wasted Spark, BSE, Tial 38mm, JDL exhaust mani, HKS turbo timer and EVC3, AEM UEGO, 3" DP into 2 1/2" Dual Exhaust, 85# Delphi's, Magna modded by Chad, Accufab FPR, Walbro 255, D2 Coilovers, GNT Poly Bushings and mounts, Autopower 4 point cage, Funk-Lock, LED Tails and Dome ... etc^4
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#3 scott87star

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Posted 10 April 2019 - 09:07 AM

No, that's not your problem, where do you have the IAT mounted?
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#4 psu_Crash

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Posted 10 April 2019 - 09:59 AM

I have the IAT after the meth injection. I'd advise doing the same.
Like Scott said, where is yours?
'86 Starion, MPI with MS2extra, Ebay To4E 57 Trim (in testing), P&P head, OS SS Valves, Wiseco +.030, ARP head/rod, RPW Roller Cam, Crower Rods,AEM H2O/Meth Injection, Mighty Max CAS 4 Direct Fire Wasted Spark, BSE, Tial 38mm, JDL exhaust mani, HKS turbo timer and EVC3, AEM UEGO, 3" DP into 2 1/2" Dual Exhaust, 85# Delphi's, Magna modded by Chad, Accufab FPR, Walbro 255, D2 Coilovers, GNT Poly Bushings and mounts, Autopower 4 point cage, Funk-Lock, LED Tails and Dome ... etc^4
2016-17 SCCA Solo Glen Region Champion in Street Modified. Going for a 3-peat this year ;)
87 Valencia Gold TSI, The new Project
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#5 speedyquest

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Posted 10 April 2019 - 10:09 AM

Another thing, having your AIT mounted on your intercooler piping before your throttle body stops the sensor from getting heat soaked if its installed in the intake manifold.

1987 Flatty Starion -- Widebody Conversion -- V-Mount Setup --  JDL Tubular Manifold  --  MX-6 Intake -- MS3-Pro -- AEM FPR  --  ARP head studs -- 3" hood exit exhaust -- Hahn Racecraft 16g --  Tial F38 Wastegate -- Tial Q Bov -- Short route piping -- 5 lug & LSD conversion -- Tubular Front End -- Manual Steering Rack Conversion -- Manual Brake Conversion -- Stack Digital Dash -- AEM UEGO -- D2 coilovers -- full GNT poly bushings & mounts -- four 8" rears -- car lightened significantly...  More to come!


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