A.J. Fletcher, 1999 Saturn SC2 (Good info inside.)

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bluetrepidation
MegaSquirt Newbie
Posts: 2
Joined: Sun Nov 13, 2005 8:24 pm
Location: Youngstown Ohio

A.J. Fletcher, 1999 Saturn SC2 (Good info inside.)

Post by bluetrepidation »

1999 Saturn SC2 5 speed

Current Configuration:
-Stock computer only controls my gauge cluster.
-MS v3 main board, with MSII blue processor, running v2.687 code.
-OBDI Saturn ignition control module.
-Innovate LC1 WB O2 sensor.
-Spare output cooling fan.
-GM stepper idle control.
-MS Knocksence unit wired to stock knock sensor.

-K&N air filter.
-Intrax lowering springs.
-Summer 17" Enkei RS5 wheels with Kumho KH711 tires.
-Winter painted black stock wheels with Mastercraft Glacier Grip II tires.
-Bendix brake components all around.*

In progress:
-New engine being built by Ross Racing Engines Niles, OH.
-Blueprinted.
-Custom Wiseco piston set.
-Forged Scat connecting rods.
-8.7:1 CR
-Clutch Masters FX300 clutch kit.
-Fidanza aluminum flywheel.
-Valve train modifications? Haven't got that far.

-Garrett GT2560R turbocharger. http://www.turbobygarrett.com/turbobyga ... 6541_1.htm
-Log style exhaust manifold built by me.
-Intercooler?
-Blow off valve?

To be continued.......

Notes:
-OBDI Saturn ICM will NOT drive the optical isolator ignition input circuit correctly. This overloads the ICM's output. Use the VR circuit instead!
-Saturn ICM doesn't seem to handle RPMs over the rev limit correctly. Be cautious.
-I had to wire the MSII processor's ignition output pin directly to the ICM. I could not get the pull up circuit to work correctly. This works fine though.

-GM stepper idle control is very problematic. This stepper will not take single steps at all. I'm currently using modified code that forces a 3 step minimum. This has solved my idle speed issues so far. Cranking position taper time still sits longer than expected when engine is warm. I ignore this by setting cranking position to start value.

-Lean tip-in with AE is still a problem. Possible solution is to run 4 squirts alternating instead of 2 squirts alternating as suggested in the MS manual. Still need to experiment.

-Stock injectors seem to like 1.3 ms for injector open time. Still experimenting.

-* I HIGHLY recommend avoiding purchasing EBC Green Stuff pads and EBC dimpled and slotted rotors for your Saturn. These breaks where HORRIBLE. Super noisy. Unbearable pulsation 1000 miles after installed. Eventually these rotors literally CRACK on me. So far with Bindex components I haven't had a single issue under the SAME driving conditions. I did save the cracked rotors and pads if anyone would like a picture.

For questions, comments, or a copy of my .msq file please email: bluetrepidation@sbcglobal.net or PM me on: http://www.msefi.com Also, if you need help tuning or getting started I am available by phone. Please contact me first.

A.J.
Last edited by bluetrepidation on Sun Mar 25, 2007 8:26 am, edited 1 time in total.
1999 Saturn SC2 1.9L DOHC 4 cyl NA
MS II Blue Processor w/ 2.687 Code, V3 PCB, MegaTune 2.25
Innovate LC1 WB O2 Sensor, OBD I Saturn Wasted Spark DIS, w/ Cooling Fan and IAC, MS Knocksence Unit
bluetrepidation
MegaSquirt Newbie
Posts: 2
Joined: Sun Nov 13, 2005 8:24 pm
Location: Youngstown Ohio

Post by bluetrepidation »

Update: 4 squirts alternating has greatly improved my low RPM lean tip in! My idle AFR is about 16:1 now with a idle PW of 1.6ms. This is very close to my injector open time but it works just fine. There is slight popping while engine breaking/down shifting because the PW pulls down to 1.3ms which is my open time. This is easier to live with then lean tip in though. This may be a good time to retry X-Tau acceleration enrichment......

Image

To be continued......

A.J.
1999 Saturn SC2 1.9L DOHC 4 cyl NA
MS II Blue Processor w/ 2.687 Code, V3 PCB, MegaTune 2.25
Innovate LC1 WB O2 Sensor, OBD I Saturn Wasted Spark DIS, w/ Cooling Fan and IAC, MS Knocksence Unit
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