Introduction:
I’ve been looking around and can’t find answers to a couple of dead ends I’ve been running into, so I figured I’d start this and hopefully help other people with similar issues. This is primarily a MS build thread dedicated to a turbo m20, but applicable to NA builds and/or other engines.
Goal:
I want to turbo my m20 to make decent power (250-300whp) that is reliable and streetable. This build will assemble a MegaSquirt-II v3.0 using wasted spark ignition, batch fire injectors, an electronic boost controller, stock ICV, LC-2 Wide-band O2 sensor, and stock crank position sensor.
Approach:
Assembly Instructions: http://www.megamanual.com/ms2/V3assemble.htm
Mega Manuals: http://www.msextra.com/manuals/ms2manuals/
E30 Wiring Diagrams (I am using the 1989 325i -325is): http://wedophones.com/BMWManualsLead.htm
TunerStudio: http://www.tunerstudio.com/
e30tech archive: http://www.e30techarchive.com/
Wasted Spark info: https://www.r3vlimited.com/board/for...ption?t=399056
MegaSquirt Components (all from DIYautotune.com):
MegaSquirt-II Programmable EFI System PCB3.0 - Kit × 1 $324.00
MegaSquirt PWM IAC Valve Control (TIP120) 'Mod-Kit' × 1 $9.00
Bosch BIP373 Coil Driver Mod Kit × 3 $30.00 (Wasted Spark)
GM IAT Sensor with open element & pigtail × 1 $22.49
Innovate LC-2 Digital Wideband Controller with Sensor - 3877 × 1 $166.00
Zeal Engineering Daughterboard with Dual VR Conditioners × 1 $42.00 (not needed?)
MegaSquirt Boost Control Mod Kit × 1 $9.00
Electronic Boost Control Solenoid Kit × 1 $58.00
24" MegaSquirt Pigtail Harness (MS1/MS2/MS3 Ready) × 1 $53.00
JimStim v1.5 MegaSquirt Stimulator with Wheel Simulator - Unassembled × 1 $80.00
MegaSquirt JimStim Stimulator Power Supply × 1 $17.00
MegaSquirt Tuning Cable (DB9 Straight Thru) × 1 $5.50
USB to Serial Adapter -TunerStudio × 1 $22.49
Subtotal: $838.48
Soldering Equipment:
Wild PCS 559 - It's a cheap Chinese unit I borrowed from a friend. I just bought a Baku D602+ off Amazon for $75, which is the same thing, but with a digital soldering iron display. The SMD gun is extremely useful for heat shrink tubing.
Brass Tip cleaner - using steel wool will destroy the coating on your tip. Brass will clean it and keep it fresh
Helping Hands Soldering buddy - Has several allagator clips to hold things while you solder. Also has a magnifying glass, because stuff is small.
Kester 83-7145-0415 Pocket Pack Silver Solder 0.020" 0.35oz. - I cannot recommend this solder highly enough. An old guy at the electronics store suggested it because I said I was building a computer board. This stuff flows well, is clean and shiny, and barely spatters any flux.
Solder Wick - this is woven copper used to suck up solder. Unless you are perfect, you will need this. Solder suckers don't work well, but this will remove solder from even the smallest PCB holes. Just hold the wick on the solder you want to remove and heat the wick with the soldering iron.
Flush Cutters - Klein D275-5 are cheap and give a good flush cut. You'll want these if you're a perfectionist.
Heat Shrink Tubing
Electrical Connectors:
This link will open the TE Connectivity Timer Contact System - Junior Power Timer Catalog (Catalog 889759-3 Revised 7-2011)
- TBD
I’ve been looking around and can’t find answers to a couple of dead ends I’ve been running into, so I figured I’d start this and hopefully help other people with similar issues. This is primarily a MS build thread dedicated to a turbo m20, but applicable to NA builds and/or other engines.
Goal:
I want to turbo my m20 to make decent power (250-300whp) that is reliable and streetable. This build will assemble a MegaSquirt-II v3.0 using wasted spark ignition, batch fire injectors, an electronic boost controller, stock ICV, LC-2 Wide-band O2 sensor, and stock crank position sensor.
Approach:
- Get the m20b25 running solid.
- Install MegaSquirt with wasted spark and learn how to tune a stock engine
- Install and tune turbo
- Build an m20b27 and apply boost
Assembly Instructions: http://www.megamanual.com/ms2/V3assemble.htm
Mega Manuals: http://www.msextra.com/manuals/ms2manuals/
E30 Wiring Diagrams (I am using the 1989 325i -325is): http://wedophones.com/BMWManualsLead.htm
TunerStudio: http://www.tunerstudio.com/
e30tech archive: http://www.e30techarchive.com/
Wasted Spark info: https://www.r3vlimited.com/board/for...ption?t=399056
MegaSquirt Components (all from DIYautotune.com):
MegaSquirt-II Programmable EFI System PCB3.0 - Kit × 1 $324.00
MegaSquirt PWM IAC Valve Control (TIP120) 'Mod-Kit' × 1 $9.00
Bosch BIP373 Coil Driver Mod Kit × 3 $30.00 (Wasted Spark)
GM IAT Sensor with open element & pigtail × 1 $22.49
Innovate LC-2 Digital Wideband Controller with Sensor - 3877 × 1 $166.00
Zeal Engineering Daughterboard with Dual VR Conditioners × 1 $42.00 (not needed?)
MegaSquirt Boost Control Mod Kit × 1 $9.00
Electronic Boost Control Solenoid Kit × 1 $58.00
24" MegaSquirt Pigtail Harness (MS1/MS2/MS3 Ready) × 1 $53.00
JimStim v1.5 MegaSquirt Stimulator with Wheel Simulator - Unassembled × 1 $80.00
MegaSquirt JimStim Stimulator Power Supply × 1 $17.00
MegaSquirt Tuning Cable (DB9 Straight Thru) × 1 $5.50
USB to Serial Adapter -TunerStudio × 1 $22.49
Subtotal: $838.48
Soldering Equipment:
Wild PCS 559 - It's a cheap Chinese unit I borrowed from a friend. I just bought a Baku D602+ off Amazon for $75, which is the same thing, but with a digital soldering iron display. The SMD gun is extremely useful for heat shrink tubing.
Brass Tip cleaner - using steel wool will destroy the coating on your tip. Brass will clean it and keep it fresh
Helping Hands Soldering buddy - Has several allagator clips to hold things while you solder. Also has a magnifying glass, because stuff is small.
Kester 83-7145-0415 Pocket Pack Silver Solder 0.020" 0.35oz. - I cannot recommend this solder highly enough. An old guy at the electronics store suggested it because I said I was building a computer board. This stuff flows well, is clean and shiny, and barely spatters any flux.
Solder Wick - this is woven copper used to suck up solder. Unless you are perfect, you will need this. Solder suckers don't work well, but this will remove solder from even the smallest PCB holes. Just hold the wick on the solder you want to remove and heat the wick with the soldering iron.
Flush Cutters - Klein D275-5 are cheap and give a good flush cut. You'll want these if you're a perfectionist.
Heat Shrink Tubing
Electrical Connectors:
This link will open the TE Connectivity Timer Contact System - Junior Power Timer Catalog (Catalog 889759-3 Revised 7-2011)
- TBD
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