Enhanced Megasquirt Group Buy for all Miatas (90-05)
 

Hey guys,

it is time for another group buy. I'll skip the chit-chat and let you know what is up.

- I've decided to go with the MS2V3 this time for several reasons, including being able to upgrade to an MS3 later on and cost.
- All units will include sequential injection. 90-93 units will be "Sequential injection ready", meaning that the extra hardware needed to support sequential will be there, you will only need to rewire the injector harness to get sequential injection.
- All units will be 100% plug and play.
- 90-93 cars can remove the thermoswitch that operates the coolant fan - the MS takes care of that now.
- 94-05 cars with A/C will have both their fans working for cooling.
- 99-05 units will get alternator control, battery light control and check egine light control.
- All units will have tacho output
- All units will have electronic boost control (the EBC solenoid valve will not be included and needs to be purchased seperately from DIYAutoTune)
- For US units, the IAT sensor is not included (shipping an IAT sensor back and forth with international shipping rates is not a smart thing to do). For non-US orders, it can be provided at an additional cost.
- All units will include all the functionality possible, including A/C control, adding to their resale value later on.
- Since the GB of 2010, there have been several improvements to my ECUs. All these improvements are EXCLUSIVE to my ECUs, as I am constantly modifying the firmware to improve things or add extra functionality that isn't there.

1) Above idle, I'm tapering down the non-linear IAT correction (used to deal with IAT heatsoaking) so that by 2000rpm, the ideal-gas law is used as is. This means that in cruise and under load/boost, your AFRs will be spot on.
2) I'm bringing in the clutch and neutral switch signal to the ECU. This allows me to do all sorts of cool things:3) Vastly improved A/C support. The A/C is now exactly like stock. 800rpm without A/C, 1000rpm with A/C. Press the A/C switch and the RPM instantly go to 1000, no hesitations or anything, cold or warm. No idle droops coming down to a red light with the A/C on. The A/C deactivates above 5200rpm and above 90% TPS. There is also an A/C indication in TunerStudio to help you identify any A/C issues.
4) More accurate fan switch on/off temps. With the previous boards, there were deviations of up to 3 degrees, due to noise. This has been fixed.
5) More accurate coolant temps in the ECU for the 99-05. I've tested the stock ECU coolant temp sensor extensively and I can now match the reading with the stock ECU up to 100*C accurately (above that the sensor itself is not very reliable)
6) PWM idle correction Vs system voltage. Simply put, if the system voltage drops, the idle valve opens up more to compensate.
7) Multiplexed inputs. I'm bring in many signals (clutch, neutral, A/C) through a single input to the ECU. This means that you will still have the options to use launch control and switchable tables.
8) Advanced knock control using the TPIC8101. The raw knock signal is filtered through the TPIC chip for the appropriate frequency (1.6L, 1.8L, 1.9L) and then fed to my microprocessor board. At this stage, the ECU is provided with a knock/no knock signal, that is also filtered by my own microprocessor board, taking under consideration the RPMs, the load, the IAT, and then decides if the knock is real or not. I would like to move this functionality inside the ECU to also provide user-defined sensitivity (3D table, RPM vs Load, with IAT being an extra modifier to increase/reduce sensitivity - higher IATs, more sensitive, etc) but I don't know if I will make it in time or not.
9) I'm also toying with the idea of giving the MS2 the ability to have two different boost tables, selectable with an external switch through the multiplexed input, each table having its own separate boost cut limit. I have not touched this yet, however it shouldn't be really difficult.

Pricing is yet to be determined, however the cost should be in the $620 area, regardless of car/year/engine, with shipping around $35 for each unit (based on the assumption that units will be shipped in batches of 5 to the US, then shipped to each location from California, through USPS using a flat rate box).

I would like to get 10 participants to be able to get the group buy going, by September the 25th. If we get 10 earlier than that, I will start asking for full payments to get the orders going out as earlier as possible. There is no limit to the number of participants. I currently have enough ECUs and components to get 12 units produced, so I need to know if I need to order more to avoid any delays.

Any questions, let me know.

If you would like a unit, put your name and car/year in the list below:

1) palmtree (2004) mt.net
2) paNX2K&SE-R (1999) mt.net
3) chiefmg (Miata 2000, 1.8) mt.net
4) rlogan (1999) mt.net
5) hattrick (1999 10AE) mt.net
6) d@nny (1994 Eunos 1.8) mx5nutz
7) Jesse99James (1999) mt.net
8) 2manyhobyz (2000 SE) mt.net
9) ccsfd (1999) mt.net
10) slopokes123 (2003) mt.net
11) bigx5murf (2004 MSM) mt.net
12) p800bry (1999 1.8) mx5nutz
13) towelie (1992 1.6) mx5nutz
14) 85z28 (1990 1.6) mt.net
15) Jeff_man 99 (1.8 and extra harness for 02 1.8 vvt) mt.net
16) Flyin96M 96 (1.8 turbo w/ 99 head) mt.net
17) Fred Gassit (93 Eunos 1.8) mx5nutz
18) MINI-P (99 1.8) mt.net
19) ARTech (91 1.6) mt.net

Dimitris

I'm in. 1990 1.6

Yay!

Name: Jeff
Year: 2004

Any other information about the car we need to provide you with?

damn... i already have a normal DIYPNP, but this is very tempting.... give me a few days to think it over.

Ability to upgrade to MS3 later you say?

I'm in.

Name: Matt
Car: 1999

Hopefully you can finish working on the additional functionality prior to shipping them out.

1) 85z28 (1990 1.6)
2) palmtree (2004)
3) paNX2K&SE-R (1999)
4)
5)
6)
7)
8)
9)
10)

aaronc7: That's the plan.

1) 85z28 (1990 1.6)
2) palmtree (2004)
3) paNX2K&SE-R (1999)
4) chiefmg (Miata 2000, 1.8)
5)
6)
7)
8)
9)
10)

I've been waiting for this, and we just got our connection back. Hooray!

This sounds great.
A few questions. The IAT sensor you mentioned, is the the GM one, or something special? (part number?)
What's the preferred knock sensor that you would use with the TPIC8101?
Will you need to know specifics other than the year (mine's 00) like boosted, injector size, etc for that customers specific application?
Thanks,
Jeff
(I've got my ski mask and am off to visit a few 7-11's):rofl:

The IAT sensor is the GM one.

I'm still using the stock knock sensor, as mounting the Bosch sensor means I have to fabricate a new bolt to mount it on the block.

Yes, I will need the specifics once I start building your unit, as all of my ECUs come with a personalized basemap to get you started asap. Btw all the ECUs come with all the sensors pre-calibrated (CLT, IAT, TPS, MAP, wideband, voltage), you only need to make sure that the TPS calibration matches.

I'm In on this one.
 

1) 85z28 (1990 1.6)
2) palmtree (2004)
3) paNX2K&SE-R (1999)
4) chiefmg (Miata 2000, 1.8)
5)Tingls2 (2002)
6)
7)
8)
9)
10)

Got to go this time, should have last time.;)

I'm in...

1) 85z28 (1990 1.6)
2) palmtree (2004)
3) paNX2K&SE-R (1999)
4) chiefmg (Miata 2000, 1.8)
5)Tingls2 (2002)
6) rlogan (1999)
7)
8)
9)
10)

I am in 1999 10AE

1) 85z28 (1990 1.6) mt.net
2) palmtree (2004) mt.net
3) paNX2K&SE-R (1999) mt.net
4) chiefmg (Miata 2000, 1.8) mt.net
5) Tingls2 (2002) mt.net
6) rlogan (1999) mt.net
7) hattrick (1999 10AE) mt.net
8) d@nny (1994 Eunos 1.8) mx5nutz
9)
10)

1) 85z28 (1990 1.6) mt.net
2) palmtree (2004) mt.net
3) paNX2K&SE-R (1999) mt.net
4) chiefmg (Miata 2000, 1.8) mt.net
5) Tingls2 (2002) mt.net
6) rlogan (1999) mt.net
7) hattrick (1999 10AE) mt.net
8) d@nny (1994 Eunos 1.8) mx5nutz
9) Jesse99James (1999)
10)

I am definitely getting in this time! ...I wouldn't mind being placed further down the list with winter fast approaching! I won't get a chance to install it for another 7-8 months plus I need to find a used netbook/laptop.

When is the last day I can get in? Money is tight but I really want this for my daily.

I'm in. #10 (2000 SE) THANKS 2ManyHobyz

This Sunday (September 25th).

1) 85z28 (1990 1.6) mt.net
2) palmtree (2004) mt.net
3) paNX2K&SE-R (1999) mt.net
4) chiefmg (Miata 2000, 1.8) mt.net
5) Tingls2 (2002) mt.net
6) rlogan (1999) mt.net
7) hattrick (1999 10AE) mt.net
8) d@nny (1994 Eunos 1.8) mx5nutz
9) Jesse99James (1999)
10) 2manyhobyz

out

I'm sorry but I can't remove your name from the list.

1) 85z28 (1990 1.6) mt.net
2) palmtree (2004) mt.net
3) paNX2K&SE-R (1999) mt.net
4) chiefmg (Miata 2000, 1.8) mt.net
5) Tingls2 (2002) mt.net
6) rlogan (1999) mt.net
7) hattrick (1999 10AE) mt.net
8) d@nny (1994 Eunos 1.8) mx5nutz
9) Jesse99James (1999) mt.net
10) 2manyhobyz (2000 SE) mt.net
11) ccsfd (1999) mt.net