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Underbody braces, turbos and more!

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PostPosted: Sun Jan 29, 2017 3:40 pm 
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Joined: Fri Nov 28, 2003 4:21 pm
Posts: 593
Location: Durham, UK
Hi,

Thanks to Dattman, I got my G10 fule rail for the next project.
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I know some of you thinks that I haven't even finished my current project but it is always good to think forward!

I have a Volvo 360 gearbox setup whith G10/13 bellhousing made.
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Instead of narrowed MX-5 subframe, I will be using a Justy rear drive arms with hubs.
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I have all of parts I need to make this come true. R1 coil overs.
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So on....

All I need now is to get hold of MOT failure G10 Swift to play with.

Cheers
Atchi


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PostPosted: Sun Jan 29, 2017 10:47 pm 
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Joined: Thu Jul 01, 2004 3:52 am
Posts: 1540
Location: Vancouver, BC, Canada
1. G10 EFI? how do you do that? T3 head without turbo? OR mill the head to fit?
2. Can RWD really capable the power of G10?
3. Cut and custom rear to fit to mount the subframe?

Nice project but I won't stop you... Just wonder!

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sorry bout my bad english


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PostPosted: Wed Feb 01, 2017 4:00 pm 
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Joined: Fri Nov 28, 2003 4:21 pm
Posts: 593
Location: Durham, UK
In UK/Europe, we have Subaru Justy which is rebadged AWD Cultus.
I have rear hubs and rear subframe from Justy. So it will be easier than you think.

I will turbo G10 with already made manifold and with about 150bhp and skinny tyres. I'm sure I can go side ways.

G10 head already has boss for mounting individual injectors. All I need is MS and it will run fine! so I have been told.

Cheers
Atchi


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PostPosted: Wed Feb 01, 2017 6:26 pm 
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Joined: Mon Dec 01, 2003 12:47 pm
Posts: 11669
Location: columbus, ohio
atchi, playing with a megasquirt'd 3 banger puts you in a rather lonely place as the msforum community never really had any 3 cylinder guys contribute to a conversation.

there are some pitfalls associated with development that i had to address while i have been playing with my turbo3.

first, batch fire with injectors large enough to support 150 hp runs like ass. i would suggest that you jump right to setting up for sequential injection to allow for tuning, especially to get a suitable idle that doesn't wash the cylinder walls down with raw gas. to run an ms in batch fire for 3 cylinders you have to spoof the set up as a 6 cylinder and that immediately affects ignition timing. you get tied to a lost fire spark.

i have sort of built upon turbohull's project work and after he threw a rod and dropped out of the turbo3 development in favor of newer engines, and took a good look at how the megasquirt controller deals with timing.

by far, my biggest concern was the high boost, high load, high rpm demise of turbohull's engine. i tested using a v/r sensor reading a 36-1 trigger wheel and i found that the sensor acted like a generator so that the higher the rpm, the higher the voltage generated. the sensor not only put out a square wave, it also transposed the square wave on a voltage that rose to around 70 volts at 6000 rpm. the typical ms build uses a number of components in circuits that "condition" the timing signal before sending it on to the processor. i found that in exactly the place you don't want a timing fart, the processor would succumb to the high voltage and cause a reset of the ignition timing and fire a plug out of sequence with the pistons' tdc. i believe this situation is what threw the rod in turbohull's engine.

if you care to see my development of hall effect devices on the crank and cam suitable for sequential timing and direct 3 channel ignition you can find it in my blue monster vert project thread. if you have more detailed questions just ask. i use some inexpensive chinese signal processing boards that output a digital/ ttl 4.76/0 square wave that can bypass the ms board's signal processing and connect directly to the processor pins on the daughter board. i tested my set up on the bench to 19,200 rpm with zero glitches.

i also used a quad driver board sold by jperf populated with just 3 channels to act as off board injection and ignition drivers. removing all the big components from the case's heat sink allows the controller to operate at way lower temps.

for my direct 3 channel ignition i used the oem hitachi ignitors triggering ford coil on plug units.

so, i guess what i'm saying is that i think that you should look into the ms extra book and go big with your controls instead of having to go back to make this or that piecemeal modifications as you go. :wink:

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1991 Blue Geo Metro Convertible highly modified 1.0L Turbo3 5 spd. - 1991 Red Geo Metro Convertible customized with a Twincam 5 spd.

My Turbo3 Project
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PostPosted: Thu Feb 02, 2017 4:54 am 
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Joined: Fri Nov 28, 2003 4:21 pm
Posts: 593
Location: Durham, UK
Yet again thank you for your advice!

I'm collecting parts at the moment.
I have read your build many times and I will be contacting you in the future.

For this project, I will supply parts and my mechanic will build as he like odd project like this!

When we are to start, I will ask you to help me with ECU setup and copy your setup!

Cheers
Atchi


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