Hi

Im planning on turbo charging my 300-24 R129 in the near future using pumpish's turbo manifolds, in the meantime, i would like to upgrade from the K-Jet system on my M104 to Megasquirt.

Which Megasquirt kit would be my best bet? Also, would i need to upgrade the ignition and the fuel or just the fuel if im aiming for 400WHP?

Thanks

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"Understeer is when you hit the wall with the front of the car, Oversteer is when you hit the wall with the rear of the car, Horsepower is how fast you hit the wall, Torque is how far you take the wall with you."

I'm using the MS2Extra, and I'm loving it. It does just about everything you'd want (including stuff you didn't even realize you wanted) except fully sequential injection and multi coil triggering. Neither was an issue for my turbo setup on a 103. YOu do have a cam sensor on the 104 and MS3 could use it to do sequential injection but I doubt it would be much advantage because with boost your pulsewidth will be longer than the valve is open in the top half of your RPM range. So even if you timed each injector to spray with the valve open, you'd still end up spraying a portion of the fuel at a closed valve.

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90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE 104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff

so will i need to be upgrading both ignition and fuel or just fuel?

also, by going with your advice and of others, which of these suits my needs best?

MegaSquirt-II Engine Management System w/PCB3 - Assembled Unit DIYAutoTune.com

or

MegaSquirt-II EMS System - SMD PCB3.57 w/ Black Case DIYAutoTune.com

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"Understeer is when you hit the wall with the front of the car, Oversteer is when you hit the wall with the rear of the car, Horsepower is how fast you hit the wall, Torque is how far you take the wall with you."

i am using ms III with p&h boards and active audi cops... it's better than ms II, you can compare it like pentium I and core 2 duo sully seqentional for fuel and spark does the diffrence

MS2 will do the job , and if your going the megasquirt route i think you should control both the spark and fuel, but you can at first just control the fuel and see how it goes then add spark control.
v3.0 and v3.57 are very similar, go to diyautotune site for more info

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W123 - M111+Turbo

IMO you are better off v3.0 as its a thru hole design as its easier to repair and modify if needed for the diyer and most of the help you will find on the megasquirt forums caters more to v3.0 boards, the only difference between v3.0 and v3.57 is that the 3.57 boards where designed to make it easier for people who sell alot of ms units to be able to make them quicker and cheaper then using the v3.0 board, as its a surface mount design and the components cost less, but because of its surface mount design its not as easy to do hardware mods or fix on your own.

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http://i762.photobucket.com/albums/x...ssa/gaby-1.jpg

just to make sure of what to order

x1 Megasquirt II V3.0
MegaSquirt-II Engine Management System w/PCB3 - Assembled Unit DIYAutoTune.com

x1 Megasquirt relay board
MegaSquirt Relay Board - Assembled Unit DIYAutoTune.com

x1 Megasquirt relay cable
MegaSquirt Relay Cable DIYAutoTune.com

x1 MegaSquirt Wiring Bundle - 12' Long
MegaSquirt Wiring Bundle - 12&#39 Long DIYAutoTune.com

x1 Turbobandit Coolant Air Temp Sensor
turbobanditen.se

x1 Turbobandit Intake Air Temp Sensor
turbobanditen.se

x1 Trubobandit Throttle Position sensor
turbobanditen.se

x1 Turbobandit fuel rail
turbobanditen.se

x6 Injectors
How many CCs should be suitable for my aim?

x1 Megasquirt v2.2 w/ Wheel Simulator
MegaSquirt Stimulator v2.2 - Assembled Unit DIYAutoTune.com

x1 Innovate LC-1 Digital Wideband Controller with Sensor
Innovate LC-1 Digital Wideband Controller with Sensor - 3769 DIYAutoTune.com

x1 Turbo Bandit Fuel Pressure Regulator
turbobanditen.se

Anything else i missed or isint really required?
Also, if i would like to upgrade my ignition system, would i need a trigger sensor and a VR sensor especially since the M104 300-24 came equipped with a VR sensor?

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"Understeer is when you hit the wall with the front of the car, Oversteer is when you hit the wall with the rear of the car, Horsepower is how fast you hit the wall, Torque is how far you take the wall with you."

I'd probably hold off on the fuel rail and regulator. The general consensus is that its much easier to just use a late 104 EFI fuel rail with the OE regulator. I'm not familiar with the turbobandit throttle position sensor but its tricky to mount any sensor on the MB throttle body. The original isn't a sensor, just a switch. That switch is a pretty small package and most TPS sensors are larger and difficult to mount. I had to fabricate a throttle body spacer to clear the sensor on my install.

__________________

90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE 104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff

interesting, thanks for the tip, im still new to this

as for how to mount the TPS, Im thinking of doing it the same way pumpish did

The plan


cutting stage


TPS attached


The final product


Also, any clue on what the CCs of the injectors should be?

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"Understeer is when you hit the wall with the front of the car, Oversteer is when you hit the wall with the rear of the car, Horsepower is how fast you hit the wall, Torque is how far you take the wall with you."

i think that is m103 throttle body, not sure if it's the same for m104 check your engine for that (and can you upload it here,thanks
as for the injector size thats depends on your horse power goal
and did you choose what turbo you are going to use?

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W123 - M111+Turbo

Will do in the morning but im pretty sure they are the same, for the time being, im aiming at 400WHP using either a Garrett GT3776 or Turbobandit's TB60-03

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"Understeer is when you hit the wall with the front of the car, Oversteer is when you hit the wall with the rear of the car, Horsepower is how fast you hit the wall, Torque is how far you take the wall with you."

Given the infinitely configurable nature of the megasquirt, absolute injector size isn't critical. There will be a fair range of injector sizes that will work. I'm sure you can google a HP/vs injector size calculator to get you in the ballpark. More important, is how will you seal them in the manifold. The original CIS injectors are an oddball shape and drop in EFI nozzle replacements will be tricky to source. I seem to recall that another member found that EV6 injectors will fit but I have no idea what flow rates they can be found in. I fabricated adaptors to use the traditional Bosch injectors in my setup.

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90 300TE 4-M
Turbo 103, T3/T04E 50 trim
T04B cover .60 AR
Stage 3 turbine .63 AR
A2W I/C, 40 LB/HR
MS2E, 60-2 Direct Coil Control
3" Exh, AEM W/B O2
Underdrive Alt. and P/S Pulleys,
Vented Rear Discs, .034 Booster.
3.07 diffs 1st Gear Start

90 300CE 104.980
Milled & ported head, 10.3:1 compression
197° intake cam w/20° advancer
Tuned CIS ECU
4° ignition advance
PCS TCM2000, built 722.6
600W networked suction fan
Sportline sway bars
V8 rear subframe, Quaife ATB 3.06 diff

As requested, here are pics of the M104 300-24 and 320 throttle bodies

The 300-24:






The 320:

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"Understeer is when you hit the wall with the front of the car, Oversteer is when you hit the wall with the rear of the car, Horsepower is how fast you hit the wall, Torque is how far you take the wall with you."

the m104 TB and m103 TB looks similar so from duxthe1 m104 won't work with megasquirt too and thanks for the pictures
any update on the project?

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W123 - M111+Turbo

its on hold for the moment, i lost 5th gear and a new gearbox is being sourced as we speak

__________________
"Understeer is when you hit the wall with the front of the car, Oversteer is when you hit the wall with the rear of the car, Horsepower is how fast you hit the wall, Torque is how far you take the wall with you."