Fuel injection 807 motor
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Thread: Fuel injection 807 motor

  1. #1
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    Default Fuel injection 807 motor

    Hi
    has anyone here converted an 807 motor to single throttle body EFI?
    I am asking as I am trying to decide what size TB would be suitable.
    Looking at some calculators, I am thinking about 40mm. Just for a normal street motor; nothing hot or fancy.

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    Just answer possible questions in advance, I am not considering ITBs. For the purpose, they are unnecessarily complicated.

    Thanks
    Andy

  2. #2
    1000+ Posts schlitzaugen's Avatar
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    The factory itself did it for the engines in R17G and R17TS (120HP).

    Much bigger than that though (don't have mine on hand to measure, but some generous soul might tell you) but it depends on what power numbers you are chasing as well.
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    1000+ Posts geckoeng's Avatar
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    Andy,
    16TS runs a 32/36 Weber, which is equivalent to a 48mm single, so I would recommend a 50mm TB. R19 has a twin choke TB already to a Weber mounting face. I have a BMW 52mm (BMW run 2x52) for my 16TX engine build, for the future, but will use 4 injectors in the manifold.

    Keep Aussie Frogs aware of your progress. What ECU and peripherals ???

    Ray
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    1000+ Posts geckoeng's Avatar
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    Quote Originally Posted by schlitzaugen View Post
    The factory itself did it for the engines in R17G and R17TS (120HP).

    Much bigger than that though (don't have mine on hand to measure, but some generous soul might tell you) but it depends on what power numbers you are chasing as well.
    The 17G was a Bosch K-Jetronic if I remember correctly. I don't think as efficient as a Mono-Injector type used on Japanese cars. My son has the Nissan type on his Holden Astra, and it is very good. All the parts can easily be made to work on a 807 motor.

    Ray
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    1000+ Posts schlitzaugen's Avatar
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    Both versions are multipoint, single TB. Can't remember what model FI, but easy to find out.

    Not sure what you mean by efficiency? They have 120HP and fuel economy better than a carby engine.
    Last edited by schlitzaugen; 5th July 2018 at 06:44 AM.
    ACHTUNG ALLES LOOKENPEEPERS

    Das computermachine is nicht fur gefingerpoken und mittengrabben. Ist easy schnappen der springenwerk, blowenfusen und poppencorken mit spitssparken. Ist nicht fur gewerken bei das dummkopfen. Das rubbernecken sightseeren keepen hands in das pockets-relaxen und watch das blinkenlights.

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    Here's one in an R8G.

    Fuel injection 807 motor-tria968.jpg Fuel injection 807 motor-tri76eb.jpg

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    1000+ Posts bowie's Avatar
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    Now doesn't that look familiar

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    1000+ Posts REN TIN TIN's Avatar
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    Quote Originally Posted by Bustamif View Post
    Here's one in an R8G.

    Click image for larger version. 

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    But it's multipoint.
    1972REN is after throttlebody FI.

    Some of the early Opel sourced Barinas had throttlebody FI.
    I know the SB Barina (mid 1990's) had TBI.
    Not sure what size they were but they were on 1.2L, 1.4L (and maybe 1.6L).
    At the other end of the scale, some of the Foulcans (from the EA I think) also had TBI but they're 4 litre motors so likely way too big for a 807 engine.
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    1000+ Posts schlitzaugen's Avatar
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    Quote Originally Posted by REN TIN TIN View Post
    But it's multipoint.
    1972REN is after throttlebody FI.

    Some of the early Opel sourced Barinas had throttlebody FI.
    I know the SB Barina (mid 1990's) had TBI.
    Not sure what size they were but they were on 1.2L, 1.4L (and maybe 1.6L).
    At the other end of the scale, some of the Foulcans (from the EA I think) also had TBI but they're 4 litre motors so likely way too big for a 807 engine.
    What?

    All FI systems have (at least) one throttle body. Multipoint or not.
    ACHTUNG ALLES LOOKENPEEPERS

    Das computermachine is nicht fur gefingerpoken und mittengrabben. Ist easy schnappen der springenwerk, blowenfusen und poppencorken mit spitssparken. Ist nicht fur gewerken bei das dummkopfen. Das rubbernecken sightseeren keepen hands in das pockets-relaxen und watch das blinkenlights.

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    Quote Originally Posted by schlitzaugen View Post
    What?

    All FI systems have (at least) one throttle body. Multipoint or not.
    Andy is looking for throttle body injection, that is the throttle body and the injector(s) in the one housing.

    Andy is obviously going for simplicity and is wanting to bolt the throttle body injection on in place of the carby.
    Regards Col

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    Hi all.
    Firstly, thanks Ray for the dimension. I will aim for that.
    Secondly, i have a Megasquirt in a box and no expience with it, but I am sue I can work it out without too much trouble.
    I did actually intend to have multipoint injection, but with a single throttle body, as having ITBs sounds like considerable extra expense and work for marginal improvement. After all, I am not trying to win races. But yes, Col, I am going for simplicity, but will do the extra for 4 injectors. That's the plan anyway.

    Thanks for the feedback.
    Andy

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    Pics of your 17 please.
    Nice to know someone else is saving another 17
    bowie likes this.
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    Mitsubishi cordia turbo comes to mind with the injection. If I'm remembering correctly, I think there where 2 injectors just after the throttle blade and a raising fuel pressure regulator to fuel in on and off bost.

    I can't remember if it was a single unit or with Injectors in the runners..

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    1000+ Posts bowie's Avatar
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    Ah (ECI) was the term they used for the throttle body injection.

    AutoSpeed - The Early Days of Turbo - Part Five

    Find an old Cordia GSR and take it's manifold

    Works: 1999 Volvo S40 T4, (has Choo Choo's)
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    Maybe contact Lotus Car Club.

    They use 807 engines and have done more performance work

    https://www.clublotus.com.au/contact/

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    Andy,
    2 of the things that make the mult-point more achievable. Come from Trigger Wheels. Others keep them but have used TW for a while now and found them most helpful. The parts are the ali extruded fuel rail and the injector bungs. I have already drilled my manifold and glued the bungs in with Devcon. Very easy operation.

    Fuel injection parts

    Ray
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    Hi
    Ray: thanks for that top information. When you say you've drilled your manifolds, do you by some chance mean you've repurposed weber manifolds? That is what I currently have so was thinking of just drilling them. Also, what are suitable type/size of injectors? I know there are options, but haven't looked at what would be the best.

    Driven: thanks for the suggestion

    Bowie: I just realised that you sold a manifold to fit on a couple of days before my post! Bad timing or what? Anyway was going to ask about that manifold, as it looked like it could be useful. Looking on Ebay, it doesnt look like the Astra manifolds there. Can you elaborate about what it is off? I guess you may not be sure anyway, but just thought I'd ask. Probably I'll just fab something....

    Thanks to all
    Andy

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    1000+ Posts geckoeng's Avatar
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    Andy,
    I used a R17 manifold, and drilled right near the head flanges , at an angle (made tooling to keep at angle) and then inserted the bungs. Will need to modify R16 bulkhead for clearance when install. And as there will be no distributor as i will have a wasted spark multi-coil, it will work well with fuel rail. No pictures unfortunately as it is in storage.

    I will be using ordinary Bosch injectors, about 150-180cc for ordinary road car use.

    Ray
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  19. #19
    1000+ Posts bowie's Avatar
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    Quote Originally Posted by 1972Ren View Post
    Hi
    ...Bowie: I just realised that you sold a manifold to fit on a couple of days before my post! Bad timing or what? Anyway was going to ask about that manifold, as it looked like it could be useful. Looking on Ebay, it doesnt look like the Astra manifolds there. Can you elaborate about what it is off? I guess you may not be sure anyway, but just thought I'd ask. Probably I'll just fab something....

    Thanks to all
    Andy
    My time on this site has been a hilarious mix of missed opportunities.

    I feel like I'm spreeing Chinese whispers now. I too went looking for early Astra manifolds and couldn't see anything that looked similar. I confess I bought it "already set" and never had a chance to install it. Ray, Bustamif. Either of you remember whence it came from.

    You are on the right track with your Webber manifolds. as others have said you could tap into them, add a fuel rail, some TB's on the end and you are done. Or, add / make a plenum with a single larger TB and you are also, then done.

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    Thanks guys, that is all really very useful information.
    I will update on any progress!

    Cheers
    Andy

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    1000+ Posts alan moore's Avatar
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    The 17TS uses a single 58mm throttle body. I expect the manifolds are out there, but far from common. I do have one, but it will be going on my modded 807 powered 4CV with an old M4 Motec.

    I believe the Holden Camira 1.8i manifold has or very close to having the right port spacing for the 807, but would require some adaption flanges welded or bolted to the original manifold.

  22. #22
    1000+ Posts bowie's Avatar
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    Alan Thank you.

    https://superchargedcamira.files.wor...d_fuelrail.jpg

    That is indeed the manifold linked above on that R8g Bustamif posted and, the manifold I just sold that had been adapted.

    Works: 1999 Volvo S40 T4, (has Choo Choo's)
    Playing: R12, SuperPos, thinks It's a race car.
    Previous: SuperGrumpy fuel spitting 504ti(ish), SuperComfortable 505 STI, SuperDoper carried my groceries Mi16
    Wanted Ye old K4J / K4M Click!

    "More and more of less and less" - Marina Abramović

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