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Sam280Z

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Sam280Z last won the day on March 2 2011

Sam280Z had the most liked content!

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About Sam280Z

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    Baton Rouge, La
  1. Idle Fueling and ITB's

    Matt, Check out this video put out by Andy Whittle. The solution I came up with 5 years ago on my turbo ITB engine was a little more involved. https://photos.app.goo.gl/hpt3FkUcJnnSSQ9s2 I cut a FI manifold flange off and welded it to replace the flange on a canon triple carb manifold. I have 19lb/hr mustang injectors at the ports and much larger injectors in the ITBs. I got the idea from Joel's monster turbo stroker. Sam
  2. I would like 1 XL short-sleeve T-shirt in black Zipcode 70808 Thanks, Sam
  3. Inner fender liners?

    I have these in pretty good/usable condition. https://goo.gl/photos/nbf6ew3WX2LKHMcv8 Let me know if you need additional pictures.
  4. Stock rear spindle/knuckle needed

    Where are you? What year Z? Which side?
  5. Ms3x install

    Agreed. This is why I asked for sources. I've searched pretty hard and have found no confirmation of a "fudge factor" or any other claims of inaccuracy in the PW calculation, intentional or otherwise, in the calculations. In my experience, Megasquirt algorithms perform "as advertised." That is, they produce results in accordance with their documentation. There are no hidden "fudge factors" to protect users from their naivety or inexperience. An overly rich condition can damage an engine just as an overly lean. I think I see the disconnect. The PW generator example you give is calculating PWs for running engine conditions. Megasquirt uses the ideal gas law to do that. (The spreadsheet you show may use the ideal gas law as well, but the formulas are hidden and password protected, so I can't easily tell.) The TunerStudio Req_Fuel generator calculates the PW (time) required to deliver a quantity of fuel to produce a stoichiometric mixture in one cylinder' volume of air at a standard atmospheric condition (1000kPa @ ~70degF IIRC). This number is then adjusted by the megasquirt algorithm based on the amount of air the tune tells it is going into the engine (expressed as VE, or the percentage of a perfectly filled cylinder under standard conditions - looked up from the VE table) and the ideal gas law which adjusts for temperature and pressure. Again, no fudge factors, just science. I might agree with you somewhat on a MS1, but this thread is about MS3, which while relatively inexpensive, is quite capable.
  6. Ms3x install

    I've never heard this before. Which advanced forums? Can you provide a link? I've searched and read the MSextra site religiously for the past 8 years and have never seen any mention of these issues. The Req_Fuel algorithm that TS uses is here: http://www.megamanual.com/v22manual/mfuel.htm I don't see any "fudge factor". What do the other PW calculators use? One thing I do know is that if you want to get a good VE table, it is critical that you have a good understanding of your injectors. You must have the correct deadtimes and voltage correction as well as the correct flow rate. (If you have exceptionally large injectors, you will need to calculate the small pw correction curve as well.) This requires testing your actual injectors with your injector drivers. That's why TS and MS provide the test modes. https://www.youtube.com/watch?v=lJgi8l-2XG4
  7. Ms3x install

    Reqfuel is the pulse width required to provide a stoich mixture at 100% VE. It is determined by the flow rate of the injectors and the displacement of the engine. Getting it correct is essential if you ever want to change injectors and don't want to have to retune everything. VE is the proportion of air, relative to the total displacement, that is entering the engine under the defined MAP and RPM. With incorporate AFR on and a correct VE table, the fueling algorithm will essentially calculate the pw for a stoich mixture and then adjust the pw for the desired AFR. This allows you to adjust the desired AFRs without changing the parameters defining the engine characteristics.
  8. Fuse #8 please help!?

    I've had a license plate lightbulb burn out in such a way that it created a dead short. Talk about a bitch to diagnose.
  9. Bed liner before or after paint?

    Never heard of gravel guard. I've had good luck with 3M products.
  10. Bed liner before or after paint?

    I wouldn't use bedliner on my car. The pros use epoxy primer. That's what I use followed by 3m rockershutz.
  11. Ms3x install

    You're wiring them to the 3x injector drivers? They can fire batch or sequential. I highly recommend testing the injectors to get thier actual flow and dead time (/voltage curve). Knowing this for your injectors will make it alot easier to tune. Use the test modes in Tuner Studio
  12. Injector bung location on custom manifold

    There is some good discussion of injector placement in this thread and others: http://forums.hybridz.org/topic/109975-turbo-intake-manifold-fabbing/?fromsearch=1
  13. AC system copper flared lines

    Search for "flare fitting gasket". They work.
  14. megasquirt? Please help.

    If you're going to assemble it yourself, you will need the jimstim, especially if this is your 1st time.
  15. L28 DEATH rattle!

    Nope. Not in this case.
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