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| Timing maps, timing maps, TIMING MAPS http://www.ladsm.com/forum/viewtopic.php?f=7&t=10039 |
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| Author: | tt281gt [ Wed Oct 07, 2009 7:32 pm ] |
| Post subject: | Timing maps, timing maps, TIMING MAPS |
So, what's your timing look like? Mind posting some JPGs?? I am asking because I am getting my car together and tuning with megasquirt. It's running, but I want my timing map evaluated by you guys before i get to tuning boost! Take a look at mine, give me pointers.  
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| Author: | clockworktoy [ Wed Oct 07, 2009 7:48 pm ] |
| Post subject: | Re: Timing maps, timing maps, TIMING MAPS |
Is that the max resolution you can get with megasquirt? And can you make your picture a little bit bigger? On my setup i have 19 columns where i can smooth everything out. From my experience big jumps in timing say from 8 to 3 from cel to cel cause knock but im not sure how megasquirt interpolates between load cels since it seems to have a very limited amount. Ill post up my timing map once i get my laptop charged. The new bigger map im working on looks something like this (enough load for 600+whp and rpm tables to rev to 10k  ) .
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| Author: | tt281gt [ Wed Oct 07, 2009 10:14 pm ] |
| Post subject: | Re: Timing maps, timing maps, TIMING MAPS |
Max resolution for MS-1. MS-2 is a whole better deal. I run this because I have had it for some time now [free]. I am not sure how to resize the picture. Photobucket will not allow me to make it bigger, maybe save it to your computer and open it there to be able to zoom? I really want to see what your curve looks like lol. |
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| Author: | turboawdfanatic [ Thu Oct 08, 2009 2:28 am ] |
| Post subject: | Re: Timing maps, timing maps, TIMING MAPS |
There are a lot of factors that go into what your timing curve should be. What compression ratio are you running? Turbo? How much boost? Fuel type? Not to mention, everybody's car runs a little different, so it's hard to just give you a timing curve. Start with the base maps. If you have a high compression motor or a stroker motor, you'll want to back off the timing a little bit. Otherwise start off with the base maps. Turn the boost down and dial in your fuel so that it's consistent at whatever AFR you are aiming for. Then turn the boost up a bit and log some pulls to make sure you have enough fuel to support the boost. Turn the boost up some more until you see knock, then back it off. At this point, if you're running a 2.0L engine you can gain some torque by adding timing advance. Add some timing on the high load map and smooth out the maps below so it's a nice progression up to the top map. Again, when you start to see knock, back it off a bit. At this point it's a dance between boost, AFR, and timing...and which will give you the most power/torque. Most people I know set their fuel static at somewhere between 10.5:1 and 11.5:1. Add boost, get more power. Add timing, get more torque. Add too much of both and BOOM! The key with boost is to stay within the efficiency range of the turbo. You can use the butt dyno to a degree, but if you really want to dial in your timing advance to take advantage of the torque gains, you'll want a dyno tune. From what I understand, unless you have made any changes to your engine's internals, the factory base timing maps are a good place to start, though I could be wrong since I don't know a whole lot about 2g cars. Disclaimer: I am writing this at 2:30am while at work waiting for videos to render, so I might be talking out of my ass.  I'm sure somebody will be quick to correct me if I am.
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| Author: | clockworktoy [ Thu Oct 08, 2009 11:48 am ] |
| Post subject: | Re: Timing maps, timing maps, TIMING MAPS |
Clint. Believe the op has already worked on his Afr map and has probably used a 2g map as a baseline. Do agree however that a smooth timing map with no knock is best for making power and safety. However different amounts of boost will hit new load cels so even if he Increases the boost with a smooth transitioning map he will still be within a safe margin of timing. That's why nice smooth tables are so nice 
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| Author: | tt281gt [ Thu Oct 08, 2009 12:37 pm ] |
| Post subject: | Re: Timing maps, timing maps, TIMING MAPS |
Well I did NOT have any BASE TIMING MAPS to begin with, I basically searched the www until I found what PEOPLE said was a stock timing map and went from there. I still have to smooth it out more and what not. By looking at your setup and ignition map I hope I can make mine even better. These are the MAPS I found online: Stock 98 Ignition map:  Resized Evo VIII:  Stock 7 bolt out of a 95 GST, 16g, stock engine minus ARP's, boost will be around 18-20PSI, 91 Octane. |
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| Author: | clockworktoy [ Thu Oct 08, 2009 1:28 pm ] |
| Post subject: | Re: Timing maps, timing maps, TIMING MAPS |
In that case I suggest Using stock 2g timing and fuel maps as a baseline. I can send you those when I get home. |
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| Author: | Illeagle [ Thu Oct 08, 2009 1:44 pm ] |
| Post subject: | Re: Timing maps, timing maps, TIMING MAPS |
Here's mine. Don't recommend it for your setup though. It'll blow things up. 
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| Author: | tt281gt [ Thu Oct 08, 2009 5:35 pm ] |
| Post subject: | Re: Timing maps, timing maps, TIMING MAPS |
What is your setup Sam?  I am assuming the vertical axis is load and it converts to KPA after moving the decimal point?? |
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| Author: | Illeagle [ Thu Oct 08, 2009 6:39 pm ] |
| Post subject: | Re: Timing maps, timing maps, TIMING MAPS |
Vertical axis is load. Its more correlated to boost ish and airflow ish and TPS ish. 2.2 load is about 16~17psi WOT. Idle is in the 4 upper left boxes. |
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