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420A Tuning solution

Posted by BLACK'98DSM, Jul 15, 2019

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  1. Yes

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  2. No

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  1. BLACK'98DSM

    BLACK'98DSM Proven Member

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    I need you guys to help me out once again. :pray:

    I'm looking for the cheapest and easiest way to tune my 420a. I know, I know "get a Megasquirt ecu..." "get ECMLINK..."

    Most of the shops anywhere near me don't even know what a DSM is.:ohdamn: And I've spent so much money on the other aspects of this car that I don't just have a few hundred dollars laying around anymore. And even if I did I have other uses for it.

    The mods list of this engine is getting increasingly long. And I've changed so many aspects of this engine far far away from stock. And in turn, the engine doesn't even want to run right anymore. It does run, but gosh it needs help. I'm at the point where the more mods I do, the lower the power goes because it doesn't know how to handle what I'm doing to it.

    This engine has great potential to it, and I can't wait to feel the power it will put out. But it desperately needs some tuning management.

    I'm trying to get this thing tuned on the stock ecu. I know that sounds ridiculous but it has to be possible somehow. Even as an electrician and upcoming mechanic, I don't want to mess around pulling cords on this car. I don't want to replace a million other parts just to make the ones I have work.

    Ok. Ok. All I need is some way to view and adjust my AFR. Maybe pull some extra timing somehow.:pray:
     

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  2. silvreclips

    silvreclips Proven Member

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    Its not worth it dude. You can control timing if you buy a MSD DIS 2 box. The only way to control fuel is to add more on top of the stock injectors. People use to run 8 injectors back in the day, 4 extra would come on in boost to give the motor extra fuel. This kept the car nice to drive without dealing with the headaches of a standalone ECU. All of this is more expensive then just buying a megasquirt.
     

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  3. BLACK'98DSM

    BLACK'98DSM Proven Member

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    How would I go about tuning the Megasquirt on my own?
     

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  4. silvreclips

    silvreclips Proven Member

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    You climb that huge mountain like most of us did and figure it out, and hopefully don't blow it up LOL. Or you pay someone to do it
     

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  5. BLACK'98DSM

    BLACK'98DSM Proven Member

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    What software do I need? What computer?

    That's what I meant haha sorry for misunderstanding.
     

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  6. silvreclips

    silvreclips Proven Member

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    Pretty much any laptop. And they sell the software. It's much better then it use to be. A lot of really cool features and useful tuning tools
     

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  7. DSMPT

    DSMPT Proven Member

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    A SAFC and a wideband, if you would like to adjust only the AFR.
     

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  8. VelocitàPaola

    VelocitàPaola Moderator

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    You're posting in the 420A forums. The SAFC doesn't work so well on these cars because their MAP sensors don't read positive pressure (i.e. boost).
     

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  9. DSMPT

    DSMPT Proven Member

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    I knew I was in the 420A forums and you are misunderstanding. The SAFC DOES work well with a MAP sensor. I knew in this forum people are saying that it doesn't work because 420a have a MAP instead of a MAF and the SAFC does not work with a MAP but that is a wrong information. I have sold and installed numerous SAFC in the past including some 420A owners. Actually it does not matter if MAF or MAP, a converter is just a converter it would convert any 5v signal. And I believe the OP's car is not boosted.
    Excuse me if I am wrong.
     

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  10. ThunderChild

    ThunderChild Supporting VIP

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    It's not that it doesn't work, it's that it's not effective on the 420a ecu. Especially when planning to boost, which I believe @BLACK'98DSM is intending to do eventually.

    @BLACK'98DSM I would honestly save up and get MS3(x), and build it yourself. Then with your jimstim you will test circuits as you go, which will help with grasping the concept of what's happening.
    There's a pretty good info database for them, and a few basemaps floating around, just have to keep looking and be tenacious.
     

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  11. DSMPT

    DSMPT Proven Member

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    I understand what you are talking about. But I am speaking as 420A is a N/A. and as I assumed that he is intending to N/A tune since what he said in his other post and he doesn't mention anything about boosting in this post, actually the OP is the only one who doesn't mention about boosting. And also according to his mods list.
    If the OP was talking about tuning methods for a boosted 420A, then the story would be different.
     

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  12. motomattx

    motomattx Proven Member

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    I have seen turbo Dsm ecu's used in the 420a cars, it would require some wiring mods or a turbo model harness but then you could use a flash based ecu or have a chip burnt, both cheap options.
     

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  13. silvreclips

    silvreclips Proven Member

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    @DSMPT good point, if he is wanting to stay NA, there may be some cheaper options.
     

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  14. BLACK'98DSM

    BLACK'98DSM Proven Member

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    Boost is an option, but that's a long time from now.

    Just so everyone knows: I want to maximize my N/A engine before I boost.

    When I finish this car (who knows when) I am taking it to Lassiter Mountain and also Barber Motorsports Park to see if I can set some records. Or even coming close would be impressive.
     

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  15. VelocitàPaola

    VelocitàPaola Moderator

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    Right, it has nothing to do with the MAP vs. MAF; most 420A owners ultimately boost their cars, and so the SAFC isn't their first choice for tuning. Corbin hacked an SAFC with an external MAP sensor on his boosted car back in the day, but I don't really see the point these days. I suppose it's a viable option for an N/A car, but I'd still recommend MegaSquirt if the plan is to eventually install a turbocharger.
     

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  16. BLACK'98DSM

    BLACK'98DSM Proven Member

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    Could I run a Megasquirt effectively N/A?
     

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  17. VelocitàPaola

    VelocitàPaola Moderator

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    Yes.
     

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  18. BLACK'98DSM

    BLACK'98DSM Proven Member

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    Yea I thought so.

    But anyway, I can't find any. I searched Ebay and the official Megasquirt website. They're out of stock.

    If anyone has a link to where I could buy a setup I would appreciate it.
     

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  19. DSMPT

    DSMPT Proven Member

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    Sure, I got your point. And yes if he plans to boost, he should go with some standalone. Well he can go with a standalone EMS, doesn't matter if the car is turboed or N/A but I am not sure if that was what he wanted in this thread as he mentioned it in his first post. There is no doubt, an EMS is the way to go if the OP is serious to tune though. But in case if the OP doesn't tune by himself and plans to ask some shop to tune it, then should ask which EMS the tuner prefers to use.
     

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