Getting ready to start my car this week!

Jon k · Post by **Jon k** » Sat May 27, 2006 8:26 am

Or try!

Let me double check if anyone thinks of anything please speak up.

MS-1 V3 setup with 6 VB921s to fire my coils wasted.
No PWM Idle yet
Spark inverted, dwell time real low to start (2.0ms crank and run).
I have a seperate harness for the spark outs on a 9 pin molex connector, 3 of those 9 pins are grounds for the VB921s specifically. 18 gauge wiring so the 6 VB921s meet the 3 grounds in pairs. 029q2 with a generic spark map made base on the VE Calculator in the Spark Page. Generic fuel map made from the VE Calculator in the Fuel Map page. Constants are setup. MAP line is run. Am I forgetting anything?

Post by **jsmcortina** » Sat May 27, 2006 10:22 am

Do not use the VE generator to create a spark map. It is ONLY for VE. That's why it says "VE specific".

James

Jon k · Post by **Jon k** » Sat May 27, 2006 10:34 am

jsmcortina wrote:Do not use the VE generator to create a spark map. It is ONLY for VE. That's why it says "VE specific".

James

Crap. Good thing we caught that. I am having a ton of difficulty creating a spark map for this motor.

evolotion · Post by **evolotion** » Sat May 27, 2006 10:36 am

there is a rules of thum guide for setting up a basic spark map to get you running, whihc for my engine turned out to be very near perfect. Tis in the megamanuel somewhere

Jon k · Post by **Jon k** » Sat May 27, 2006 10:47 am

evolotion wrote:there is a rules of thum guide for setting up a basic spark map to get you running, whihc for my engine turned out to be very near perfect. Tis in the megamanuel somewhere

I am trying to use the excel spreadsheet that someone posted under Spark tuning - it seems like its making a flipped map? My engine used to idle around 37 kPa which this spreadsheet says will idle with 27 degrees of advance!?

Edit - I am not seeing anything about Spark table in Megamanual? Link?

If anyone is feeling gracious to guide me on, this is a 6 cyl 2.5L motor:

2494cc / 152cu in
189hp @ 5900 rpm
184ft tq @ 4200 rpm
6500 rpm redline

4 valves per cyl, dual overhead cam, 10.0:1 CR

evolotion · Post by **evolotion** » Sat May 27, 2006 10:52 am

that looks right tbo, jsut scale the advance down at idle.

Jon k · Post by **Jon k** » Sat May 27, 2006 11:00 am

evolotion wrote:that looks right tbo, just scale the advance down at idle.

How? The ignition map, in 3D mode, looks nothing like the ones people post

Post by **jsmcortina** » Sat May 27, 2006 11:00 am

Nothing wrong with that table you posted. Rather conservative (lame) if anything. The default MS1/Extra table has more advance at high load/high rpm.

James

Jon k · Post by **Jon k** » Sat May 27, 2006 11:22 am

jsmcortina wrote:Nothing wrong with that table you posted. Rather conservative (lame) if anything. The default MS1/Extra table has more advance at high load/high rpm.

James

I see... so is it ok to just load that table and go. Or should I bring down the advance at idle?

evolotion · Post by **evolotion** » Sat May 27, 2006 11:29 am

will probably be ok to jsut go, my car can take pretty silly advance at idle only a 1600cc but still 4 valve/cylider etc so rougly the same burn characteristics.

if your concerned just bump the bottom left 4 cells down a bit. cant hurt. once its running you wil lknow for sure whats what.

Jon k · Post by **Jon k** » Sat May 27, 2006 12:28 pm

evolotion wrote:will probably be ok to just go, my car can take pretty silly advance at idle only a 1600cc but still 4 valve/cylider etc so rougly the same burn characteristics.

if your concerned just bump the bottom left 4 cells down a bit. cant hurt. once its running you wil lknow for sure whats what.

My first time doing timing on ANYTHING. No risk of blowing the motor up at an idle speed right?

This map is from my stock ecu - should I try and mimic it?

How low should I drop the idle spark characteristics? I hear people mentioning like 9 degrees idle... should I drop it that far down?

evolotion · Post by **evolotion** » Sat May 27, 2006 12:55 pm

by all means. but maybe retartd the full load stuff by a few degree's untill your happy that the timing is exactly matched (doing the static 10 deg advance test with the engine running) and untill you have the fuel map in the riight ballpark atleast. jsut to be on the safe side.

worst case scenario at crank/idle is that the engine will kick back on the starter(generally doesnt do any harm). no real risk of damage to the engine. get the tune wrong at idle and itll jsut stall or not run

Jon k · Post by **Jon k** » Sat May 27, 2006 1:04 pm

evolotion wrote:by all means. but maybe retartd the full load stuff by a few degree's untill your happy that the timing is exactly matched (doing the static 10 deg advance test with the engine running) and untill you have the fuel map in the riight ballpark atleast. just to be on the safe side.

worst case scenario at crank/idle is that the engine will kick back on the starter(generally doesnt do any harm). no real risk of damage to the engine. get the tune wrong at idle and itll just stall or not run

What's the "static 10 deg advance test"?

evolotion · Post by **evolotion** » Sat May 27, 2006 1:12 pm

where you set the "fixed angle" bit in megatune from -10 to 10 (or whatever, actually) and then use a timing light to make sure your timing is whre it should be useing whatever timign markings you have on your flywheel/crank pully.

i.e. you wana make sure , for example 15 degrees advacne in megatune is actually 15 degrees advance on the engine. as any deviation could either result in power loss or holed pistons at high load.

Jon k · Post by **Jon k** » Sat May 27, 2006 1:18 pm

evolotion wrote:where you set the "fixed angle" bit in megatune from -10 to 10 (or whatever, actually) and then use a timing light to make sure your timing is whre it should be useing whatever timign markings you have on your flywheel/crank pully.

i.e. you wana make sure , for example 15 degrees advacne in megatune is actually 15 degrees advance on the engine. as any deviation could either result in power loss or holed pistons at high load.

I see. I will have to invest in a timing light.

Jon k · Post by **Jon k** » Sat May 27, 2006 4:07 pm

Now that I think about it - I am COP - how would I use a timing light?

Post by **jsmcortina** » Sat May 27, 2006 4:15 pm

Cheapo timing lights connect between the plug lead and the plug. So you'd connect it between the COP module and the plug.

Whatever you do, you MUST check your timing with a light.

James