free hit
counters
Megasquirt on a V8 build - ECU/OBDII - The Lotus Forums Jump to content
v8GTmac1

Megasquirt on a V8 build

Recommended Posts

As mentioned here it is for those who might find interest, THis is Megasquirt 2 soon to be running semi-sequential fuel and wasted spark LS1 coils , running on 7 cylinders with the stock ECU still hooked up for running a bunch of stuff

Fans

AC

Tach

SPeedo

Emissions

Secondary injectors

Boost control

Idle control

Electric water pump

 

 

 

  • Like 2

Share this post


Link to post
Share on other sites

Upgrade today to remove Google ads and support TLF.

V7GTmac1?  Come up a coil short, or are you really running one cylinder on OEM and 7 on Megasquirt?

Share this post


Link to post
Share on other sites

😝  it has OEM ignition problems. I've given up on the factory ignition system even though I can fix it for a $300 and some labor. 

 

Not to mention all other oem tuning issues. Dont need emissions here and I want to control my water injection and turn the boost up in the winter. 

  • Like 1

Share this post


Link to post
Share on other sites

Looking forward to build/tuning details...

Share this post


Link to post
Share on other sites

This video is with all 8 injectors hookedup on Semi-sequential. I would need MS3x expansion card and case to do Full Sequential. Baby steps. 

It started on the 1st crank with no base tune, no Wideband 02 linked up and still only 7 cylinders firing.  

Now that I got this far, i've tore into the plenum, ripped out the coilpacks and started my conversion. 

 

Share this post


Link to post
Share on other sites
  1. I’m very very hesitant to post pics of my build that deviate from the originality of the car but in hope of someone seeking the road less traveled ....here is just a few

Water injection nozzles 2gph  and I removed a couple things if anyone cares to notice  

57b8b09577e74c14b7d0485200fbba5f.jpeg

23d12949621a4cd8a067b77b57b571df.jpeg

675e372e1f3944a5b225740263f48bd9.jpeg

 

945f63f039f148f8bbf196278ced5c47.jpeg

 

 

Edited by v8GTmac1

Share this post


Link to post
Share on other sites

It's great to see other peoples ideas being brought to life.

One query: how will you measure the true IAT if the jets are directly in the plenum?  Looks like you are using the standard compressor duct IAT location.


1996 Esprit V8, 1998 Esprit V8 GT, 1999 Esprit S350 #002 (Esprit GT1 replica project), 1996 Esprit V8 GT1 (chassis 114-001), 1992 Lotus Omega (927E), 1999 Esprit V8SE, 1999 Esprit S350 #032, 1995 Esprit S4s, 1999 Esprit V8 GT (ex-5th Gear project), 1999 Esprit V8SE ('02 rear)

1999 S350 #002 Esprit GT1 replica

Share this post


Link to post
Share on other sites

Yeah I don’t know if there is an easy way here. Unless of course I sprayed water before the turbos?

i think the more accurate way would be EGT.  But I already have too many gauges hooked up. 

Share this post


Link to post
Share on other sites

Why not install the jets in the compressor ducts between the turbo and throttle body?  It would still be upstream of the IAT sensor.


1996 Esprit V8, 1998 Esprit V8 GT, 1999 Esprit S350 #002 (Esprit GT1 replica project), 1996 Esprit V8 GT1 (chassis 114-001), 1992 Lotus Omega (927E), 1999 Esprit V8SE, 1999 Esprit S350 #032, 1995 Esprit S4s, 1999 Esprit V8 GT (ex-5th Gear project), 1999 Esprit V8SE ('02 rear)

1999 S350 #002 Esprit GT1 replica

Share this post


Link to post
Share on other sites

Didn’t seem like enough meat to drill and tap the 1/8npt. 

The nozzles might be small enough I can add 2 more 

Share this post


Link to post
Share on other sites

That's where I had mine installed on my other V8. I think I just tapped into the duct which did work but if I did it again I would consider having a small disk welded in place to provide more material to work with.

FYI I used an ERL Aquamist with an FIA2 that took a trigger from a fuel injector to add the water when other conditions were met but I can't remember what they were.

cheers

-Chris

Share this post


Link to post
Share on other sites

 

1 hour ago, cweeden said:

FYI I used an ERL Aquamist with an FIA2 that took a trigger from a fuel injector to add the water when other conditions were met but I can't remember what they were.

Most modern systems have the option for triggering off the MAP 


1996 Esprit V8, 1998 Esprit V8 GT, 1999 Esprit S350 #002 (Esprit GT1 replica project), 1996 Esprit V8 GT1 (chassis 114-001), 1992 Lotus Omega (927E), 1999 Esprit V8SE, 1999 Esprit S350 #032, 1995 Esprit S4s, 1999 Esprit V8 GT (ex-5th Gear project), 1999 Esprit V8SE ('02 rear)

1999 S350 #002 Esprit GT1 replica

Share this post


Link to post
Share on other sites

Nice one, I have an MS3/X on my GT3. The main trouble I've had is that the only place anywhere near me that will touch those ECU's isn't cheap. I also had an injector driver fail and hold wide open on the X card, but I managed to de-solder it and get a new one on there.

Share this post


Link to post
Share on other sites

That’s scary. How did you know the injector was wide open ?

ms3 has a diagnostic for this?

 

 

Share this post


Link to post
Share on other sites

I got some updates .....

 

dee54fb3bae64c65812ea348fb06d815.jpeg

 

1351c79f8cb641d3a0d042a4a7b056f0.jpeg

3c85941bacd84b8e89a647d6274a96e7.jpeg

Now I have a place to put stickers!

aa0bf8d8e74f4b9f83ee9b5bee3aff3f.jpeg

c0dd298cc9044f6ba10001686c2815c2.jpeg

f4e6b59536fc490caeaedb79d61f54d9.mov

 

 

 

f4e6b59536fc490caeaedb79d61f54d9.mov

Edited by v8GTmac1

Share this post


Link to post
Share on other sites

Too many gauges but great piece of mind 

And originality was long gone. 

23f96683b4274709838a670e6d4102ad.jpeg

 

dc2533503eeb4658870ee7260c138287.jpeg

Edited by v8GTmac1

Share this post


Link to post
Share on other sites
10 hours ago, v8GTmac1 said:

That’s scary. How did you know the injector was wide open ?

ms3 has a diagnostic for this?

 

 

I guessed due to loss of power, white smoke and stench of fuel from the exhaust. I then used the JimStim to diagnose which one was faulty. If you don't have a JimStim, I would highly recommend getting one.

Share this post


Link to post
Share on other sites

Yet another idling video with updates, No driving yet unfortunately waiting on WIFI adapter to start tuning.  Running much smoother now, last video was on 6 cylinders again. 😆

just some incorrect soldering inside my computer. 

 

Edited by v8GTmac1

Share this post


Link to post
Share on other sites

I ran a cable from the stock ECU location through the sunroof and into the cabin for tuning. You can do it without needing to make any holes.

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...