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Megasquirt Ignition Advance Maps

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    #16
    20* without alc / 24* with alc is what he said
    Escort GTR -- 11.87 @ 117.6 mph -- 320 HP / 325 Ft. Lbs. @ 23 PSI
    ... The first FWD BG with a Toyota E153 transmission conversion in the USA!
    Looking for BP x Toyota E153 adapter plates? PM me or contact me on Facebook: Riel Performance Parts

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      #17
      Mitsubishi EVOs run 20+ degrees advance at 20+psi of boost so not sure what's going on there.

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        #18
        well it all depends on the setup in the car, AFR, shape of the combustion chamber. Mitsubishi EVO has like a 8:1 compession ratio. I have a 9:1 in my car. I know Nissan's run 16-18 as well. RX-7's run around 16 at 25PSI. It all depends on the person's setup. All I am saying is my setup and every other Miata I've known with no alcohol will detonate at around 4000RPM if timing is more than 12deg advanced. Now you can change yours to 20. I am putting my 2cents. I don't believe anything until I see it and know about the setup.

        If it's on the net, it doesn't mean it's true. I have seen too many "running" setups that just by looking at the setup, you know the car has never ran, b/c it would be impossible to run. I have tune cars since the 90's and this is not based on running one car on a DIY system.

        My 2 cents.
        Omid
        1990 Mazda Protege GTR
        1991 Ford Escort GTR (GT2876)
        1985 Mazda RX-7 GT-1 Race Car (13B PP)

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          #19
          The GTX motor I am running has 8.2 compression though ... so I can push ignition a little further.

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            #20
            For sure. You should be able to run 16-17deg Advanced without an issue. I would not play with it as I said until you have your new engine in and on the dyno. Doing timing on street is pretty pointless.
            One other thing is b/c you can run 20deg advanced, that doesn't mean that you will make more power. There is a point that you will start losing power with more advanced. Therefore you have to find that on the dyno and tune it there.
            Omid
            1990 Mazda Protege GTR
            1991 Ford Escort GTR (GT2876)
            1985 Mazda RX-7 GT-1 Race Car (13B PP)

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              #21
              Originally posted by bcrx7 View Post
              For sure. You should be able to run 16-17deg Advanced without an issue. I would not play with it as I said until you have your new engine in and on the dyno. Doing timing on street is pretty pointless.
              One other thing is b/c you can run 20deg advanced, that doesn't mean that you will make more power. There is a point that you will start losing power with more advanced. Therefore you have to find that on the dyno and tune it there.
              In the upper section of the map you are dropping down to 9 degrees advance, is that area untuned or does it actually ping if you push it to 12 degrees there?

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                #22
                I have left it at 9. Over 4000RPM i can probably actually go back up again to 16 or 17 degrees. I just left it for the dyno tune in couple of weeks.
                Omid
                1990 Mazda Protege GTR
                1991 Ford Escort GTR (GT2876)
                1985 Mazda RX-7 GT-1 Race Car (13B PP)

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                  #23
                  Here's my current map. No audible detonation and plugs are clean. 94 octane, big FMIC and 8.2 compression
                  Attached Files

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                    #24
                    finally got my stuff off the tuning laptop using my dads digital camera like a flash drive... lol

                    heres the screen shot of my timing map and a shot of one of my plugs after two back-to-back 0-100mph WOT runs. i know nothing about reading plugs, and my eyesight kinda sucks up close lol.

                    i was going to include the log from those WOT runs but it wont let me...sooo a screen shot of the 2nd one will suffice i guess. as you can see, my MAP under boost is very unstable.... it holds rock solid on my autometer boost gauge though .

                    oh yeah, 8.2:1 compression... gtr motor, gtr turbo, single msd coil on ms2
                    Attached Files
                    Last edited by therieldeal; 07-27-2007, 12:36 AM.
                    Escort GTR -- 11.87 @ 117.6 mph -- 320 HP / 325 Ft. Lbs. @ 23 PSI
                    ... The first FWD BG with a Toyota E153 transmission conversion in the USA!
                    Looking for BP x Toyota E153 adapter plates? PM me or contact me on Facebook: Riel Performance Parts

                    Comment


                      #25
                      Jon that plug doesn't look good at all ... it looks eaten away. How much does the MAP signal oscillate by in kpa?

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                        #26
                        its not eaten away, its an Denso/HKS iridium plug with a fine-wire electrode. i thought the same thing when i first took them out of the motor (they were in it when i bought it).



                        map signal generally jumps up and down from 160-170 but sometimes dips as low as 150. seems to alternate high and low every other sample in the log.
                        Escort GTR -- 11.87 @ 117.6 mph -- 320 HP / 325 Ft. Lbs. @ 23 PSI
                        ... The first FWD BG with a Toyota E153 transmission conversion in the USA!
                        Looking for BP x Toyota E153 adapter plates? PM me or contact me on Facebook: Riel Performance Parts

                        Comment


                          #27
                          the sensor's sensitivity is close to 1 psi which is around 7 kpa so that is not too bad ... mine jumps around as well a bit - you ca try a small inline filter with the map signal. I'm going to go and grab a plug and get some pics

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                            #28
                            the pic of that plug is a bit out of focus by the way, the camera ONLY does autofocus so it ended up backfocused no matter what... hence the box RIGHT behind it to try to make it a little better.

                            i am going to try a filter i think. also the latest beta code for MS2 changed when the map signal is sampled... instead of every X number of milliseconds it now samples based on the tach signal, so it samples at the same point in the engine cycle every time. supposed to smooth things out INCREDIBLY, but i havent tried it yet.
                            Escort GTR -- 11.87 @ 117.6 mph -- 320 HP / 325 Ft. Lbs. @ 23 PSI
                            ... The first FWD BG with a Toyota E153 transmission conversion in the USA!
                            Looking for BP x Toyota E153 adapter plates? PM me or contact me on Facebook: Riel Performance Parts

                            Comment


                              #29
                              here is jacobs old map... he had 9.5:1 compression with a T3 on this motor.

                              i was too scared to try his map:

                              Escort GTR -- 11.87 @ 117.6 mph -- 320 HP / 325 Ft. Lbs. @ 23 PSI
                              ... The first FWD BG with a Toyota E153 transmission conversion in the USA!
                              Looking for BP x Toyota E153 adapter plates? PM me or contact me on Facebook: Riel Performance Parts

                              Comment


                                #30
                                Here's my plug pulled tonight. Notice the fine peppering on it which means I have slight detonation - it's very slight and aside from that the plug looks clean. The timing is off by 1 or 2 degrees of timing.

                                Jon, be careful running that much timing because as you can see I run less timing and I still be borderline.
                                Attached Files
                                Last edited by Lex; 07-27-2007, 09:26 AM.

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