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> Zach's Carbs to Microsquirt conversion thread, 7/20/18 update
post Oct 11 2011, 06:44 PM
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I am retrofitting this thread to be my full on conversion thread, documenting my change from dual 40 Webers to MSII fuel injection.

Here is what I have so far, and what I need:
  • MSIIv3.52 pre-built box.
  • JimStim board for testing the MSII box
  • V3 main Board wire harness.

    Will soon have:
    Injection system off a 1.8 914, from which I will use
  • Throttle body
  • Intake Runners
  • Fuel Injectors (unless I find they don't flow enough fuel)
  • Fuel Rail
  • Fuel Pump (maybe - Joe may still need it for himself)

    Stuff I need:
  • TPS or MAF sensor
  • 4 wire O2 sensor
  • Bung welded into exhaust
  • Fuel Pump (Maybe, see above)
  • Other stuff I don't know about yet
The engine is a 2056, particulars as follows:
Built on 1.7 heads.
Jake's 9530 cam (carb cam similar to Web 494)
Mallory optical ignition
ACCEL (UltraCoil) coil.
SSI exchangers for exhaust.

My goals for this project are to have near stock intake noise volume, better cold starting - especially in cooler weather, negate the bad effects or Ethanol on carbs, teach myself something about fuel injection.

Since I already have a pretty good ignition system, I am not going to go after crank fired ignition at this time, but I am not ruling that out for the future.

Before I begin the conversion, I am going to pull the engine and do a little refreshing and cleaning, including:
  • Fixing an oil leak at the front of the engine
  • cleaning under all tins (not that I exect to find much, but its a good thing to do)
  • Fix some cooling tins issues that I have been living with for the past 2 years
  • Open up holes in the tins I welded shut so I can replace heater tubing and heat my cabin!
  • Check for battery acid leaks or rust appearance in the engine bay. Neutralize.
I am getting ready to start my conversion form carbs to EFI.

My goal is to use as much stock EQ as I can, but replace the sensors and such with modern, easy and cheaper to find stuff. Plus, since my car has a cam, the stock FI will not work.

My engine has 1.7 4 bolt heads.
1) are the 1.7 and 1.8 intake runners the same?
2) Is the intake runner inside diameter smaller then the 2.0 intake runner ID?
3) is the throttle body for the 1.8 smaller then the throttle body for the 2.0?

If the 1.8 TB is smaller then the 2.0, can the 2.0 TB be swapped in?

Are 1.8 injectors high or low impedance?

I am asking this as I will be able to get Joe's discarded 1.8 bits when he pulls his engine and starts going down the 2056 route.

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Vacca Rabite   Zach's Carbs to Microsquirt conversion thread   Oct 11 2011, 06:44 PM
underthetire   1.7 and 1.8 runners are not the same, 1.8 is sligh...   Oct 11 2011, 07:59 PM
Krieger   I pretty sure the stock throttle body bore for a 2...   Oct 11 2011, 08:13 PM
McMark   Yup, none of the intake runners are the same or in...   Oct 11 2011, 09:48 PM
Valy   Since you want to use newer parts, L-Jet (1.8) is ...   Oct 11 2011, 11:20 PM
Vacca Rabite   If the 1.8 and 2.0 intake runners are the same ID,...   Oct 12 2011, 06:21 AM
r_towle   If the 1.8 and 2.0 intake runners are the same ID...   Oct 12 2011, 06:54 AM
7275914911   In the research I did it looked like the Bus plenu...   Oct 12 2011, 06:30 AM
FourBlades   If you are going to megasquirt, is there a plenum ...   Oct 12 2011, 06:30 AM
edwin   what carbs do you have now? why not use them and w...   Oct 12 2011, 06:57 AM
Vacca Rabite   My primary goal is to kill the roar of running dua...   Oct 12 2011, 07:02 AM
r_towle   My primary goal is to kill the roar of running du...   Oct 12 2011, 02:41 PM
scotty b   How about getting a TPI setup from a Chevy V8 and ...   Oct 12 2011, 07:06 AM
Vacca Rabite   How about getting a TPI setup from a Chevy V8 and...   Oct 12 2011, 08:12 AM
Dave_Darling   You can probably build an air-box for a lot less t...   Oct 12 2011, 03:09 PM
FourBlades   I finished building this same thing recently in th...   Oct 12 2011, 03:31 PM
Vacca Rabite   There are a lot of other advantages of EFI, especi...   Oct 12 2011, 04:48 PM
jsayre914   cant you just redrill the intake flanges and bolt ...   Oct 12 2011, 04:52 PM
Vacca Rabite   cant you just redrill the intake flanges and bolt...   Oct 12 2011, 06:12 PM
dlee6204   :popcorn: Please do!   Oct 12 2011, 04:53 PM
76-914   Hey Zack, Will you be our "FI Poster Boy...   Oct 12 2011, 05:24 PM
TargaToy   Zach, I'm glad you're asking this stuff. ...   Oct 12 2011, 06:04 PM
Dave_Darling   Was wondering the same thing about the 1.8 runners...   Oct 12 2011, 07:06 PM
FourBlades   I apologize if this is a hijack. I would like EFI...   Oct 12 2011, 06:05 PM
underthetire   Zach, if you get the v3 board on the megasquirt, i...   Oct 12 2011, 07:05 PM
Vacca Rabite   I already have an MSII v3.52 "factory" b...   Oct 12 2011, 08:14 PM
Vacca Rabite   I am retrofitting this thread to be my full on con...   Oct 12 2011, 08:35 PM
Dr Evil   :popcorn:   Oct 12 2011, 08:43 PM
moparrob   I've got a nice fuel pump you can have if you ...   Oct 12 2011, 09:17 PM
jcd914   The extra pump is a Bosch 0 580 254 979 which is...   Oct 12 2011, 11:03 PM
Valy   The extra pump is a Bosch 0 580 254 979 which i...   Oct 13 2011, 10:33 AM
Vacca Rabite   Rob, consider me letting you know I want it. PM me...   Oct 12 2011, 09:20 PM
moparrob   you've got mail....   Oct 12 2011, 09:44 PM
a914622   I know a guy that pulls the stuff needed to make t...   Oct 12 2011, 11:32 PM
Vacca Rabite   Just finished pulling the engine. We are official...   Nov 5 2011, 08:22 PM
jsayre914   Joe, your 1.8 out yet? I need to scavenge! ...   Nov 6 2011, 05:46 PM
aircooledtechguy   I just finished a similar conversion for my '6...   Nov 7 2011, 10:08 AM
charliew   I'm just reading along and hopefully learning ...   Nov 7 2011, 11:05 AM
Brodie   Zach, There are some calculations to determining ...   Nov 7 2011, 01:14 PM
Vacca Rabite   Okay, I've not updated this thread since Novem...   Aug 17 2012, 08:36 PM
JamesM   025 133 067a ;) if you can find one   Aug 17 2012, 09:36 PM
Vacca Rabite   A quick update. Yesterday I picked up a used, but...   Oct 18 2012, 07:25 AM
OU8AVW   A quick update. Yesterday I picked up a used, bu...   Nov 28 2012, 08:51 AM
McMark   :mueba:   Oct 18 2012, 08:18 AM
ConeDodger   You'll like it! Mark really has something ...   Oct 18 2012, 10:21 AM
Dr Evil   Just in time to store it for winter!   Oct 18 2012, 03:13 PM
Vacca Rabite   If it runs in the winter that means it is likely t...   Oct 18 2012, 04:25 PM
hot_shoe914   So, do you still want the loaner motor? :confused...   Oct 18 2012, 08:09 PM
Vacca Rabite   If I have the loaner motor, I won't need it. I...   Oct 18 2012, 09:17 PM
hot_shoe914   If I have the loaner motor, I won't need it. ...   Oct 19 2012, 07:10 AM
Vacca Rabite   Last week I picked up a triad muffler from Bill in...   Oct 22 2012, 03:33 PM
wndsrfr   Geez, you're working fast Zach....good to see ...   Oct 22 2012, 06:00 PM
Vacca Rabite   Yeah man, it worked great. It took very little ti...   Oct 22 2012, 06:05 PM
McMark   You didn't warp it. :D   Oct 22 2012, 10:28 PM
ConeDodger   You didn't warp it. :D Wow! You weld l...   Oct 22 2012, 10:52 PM
Vacca Rabite   My welds are not pretty. But they hold just fine. ...   Oct 23 2012, 04:12 AM
ConeDodger   My welds are not pretty. But they hold just fine....   Oct 23 2012, 08:47 AM
Vacca Rabite   Triad muffler now has 4 coats of paint. After I ou...   Oct 23 2012, 07:59 PM
Vacca Rabite   Just updated my project plan. I have reached the ...   Oct 24 2012, 07:37 AM
saigon71   Kick ass! Looking forward to seeing your car ...   Oct 24 2012, 08:12 AM
aircooledtechguy   Way to go Zach!! :beer2: Having fun AND ...   Oct 24 2012, 09:39 AM
Vacca Rabite   Just got a call from Joe that my tin was done at t...   Oct 24 2012, 09:43 AM
jsayre914   I cant wait to pick up your tin :Qarl: I advis...   Oct 24 2012, 03:31 PM
jsayre914   I do believe we deserve some pictures sir..... ...   Nov 1 2012, 10:36 AM
Vacca Rabite   I got my Tins from joe last night. Yesterday I als...   Nov 1 2012, 04:04 PM
Vacca Rabite   Got my heads today. Woot! I need to CC them in...   Nov 13 2012, 11:18 AM
McMark   I'll ship off your crank sensor ASAP. ;)   Nov 13 2012, 12:12 PM
jsayre914   C,mon Zach show us some HEAD !!!!   Nov 14 2012, 11:05 AM
jsayre914   Is it finished ??? :popcorn:   Nov 18 2012, 02:03 PM
Vacca Rabite   Everyone but Erin at home right now is sick. I sti...   Nov 18 2012, 02:51 PM
Vacca Rabite   I should have the stuff I need to CC the heads Mon...   Nov 20 2012, 09:27 PM
McMark   Stock works. ;)   Nov 20 2012, 09:27 PM
Vacca Rabite   I don't think I have a stock regulator. Off t...   Nov 20 2012, 09:29 PM
McMark   Got you covered. I have plenty.   Nov 20 2012, 09:32 PM
Vacca Rabite   Woot! Zach   Nov 20 2012, 09:36 PM
Vacca Rabite   CCed my heads today. Came out to between 60 and 61...   Nov 26 2012, 05:19 PM
Dr Evil   With a deck at 40, you should be fine with 87.   Nov 26 2012, 05:25 PM
Vacca Rabite   http://www.914world.com/bbs2/uploads_offsite/farm9...   Nov 26 2012, 07:36 PM
Vacca Rabite   Got a small box from Mark today!!! ht...   Dec 10 2012, 08:24 PM
Vacca Rabite   I got more stuff today!!! Original Cus...   Mar 7 2013, 08:48 PM
Dr Evil   Eh, you'll still fuck it up :poke:   Mar 7 2013, 08:55 PM
Vacca Rabite   Eh, you'll still fuck it up :poke: So... How...   Mar 7 2013, 09:09 PM
Dr Evil   I have been busy :angry:   Mar 7 2013, 09:10 PM
saigon71   Looking like the parts are rollin in Zach. :beer...   Mar 8 2013, 07:32 AM
JimN73   Glad to see that you got your stuff from Mark. He...   Mar 8 2013, 12:44 PM
FourBlades   Nice looking setup! I can't remember, are...   Mar 8 2013, 07:07 PM
Vacca Rabite   Common plenum off a 1.8. The impetus for this was...   Mar 8 2013, 09:16 PM
cgnj   Common plenum off a 1.8. The impetus for this wa...   Mar 10 2013, 05:29 AM
Vacca Rabite   Common plenum off a 1.8. The impetus for this w...   Mar 10 2013, 06:22 PM
Ductech   Dude.... All this work and you could have like a w...   Mar 9 2013, 01:50 PM
Vacca Rabite   This car will always have a T4. When the 2056 get...   Mar 9 2013, 07:20 PM
Vacca Rabite   My engine is back to being a long block for the fi...   Apr 5 2013, 10:58 PM
Vacca Rabite   Yesterday I double checked my pushrod geometry. S...   Apr 8 2013, 12:57 PM
Vacca Rabite   Since I have not added pic in a while... http://ww...   Apr 8 2013, 05:25 PM
McMark   The distributor block off will stay in without the...   Apr 8 2013, 05:35 PM
Vacca Rabite   Haha! I knew I had some cut to length pushrods...   Apr 9 2013, 06:26 PM
saigon71   Haha! I knew I had some cut to length pushrod...   Apr 9 2013, 08:34 PM
914itis   Haha! I knew I had some cut to length pushro...   Apr 10 2013, 06:58 AM
Vacca Rabite   All pushrods are now in-spec. :-) And I have new...   May 4 2013, 08:05 PM
Vacca Rabite   http://www.914world.com/bbs2/uploads_offsite/farm9...   May 5 2013, 06:14 PM
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