Magasquirt
  • Help
Results 1 to 19 of 19

Thread: Magasquirt

  1. #1
    VIP Sponsor
    Join Date
    Aug 2000
    Posts
    9,562

    Default Magasquirt

    I fitted Megasquirt to the 505 GTi yesterday, took from 0900 to 1500 without rushing and spending some time working out the connections to the Bosch Jetronic ECU, the easiest conversion yet, the wiring to the ECU on the series 2 is very accessable.
    The car runs but I haven't fitted the vacuum sensing hose to the MAP sensor yet, this will be the hardest part, getting it through the wire wall.
    Next to tune it, hopefully to get better fuel economy, I didn't like the 11.5 km/100 cruising.
    Graham

    Advertisement

  2. #2
    Tadpole kingpug500's Avatar
    Join Date
    Nov 2010
    Location
    Melbourne
    Posts
    15

    Default

    wat stage megasqurit are you running?
    did you have to modify the TFI

  3. #3
    1000+ Posts jo proffi's Avatar
    Join Date
    May 2003
    Location
    sydney
    Posts
    8,496

    Default

    Quote Originally Posted by GRAHAM WALLIS View Post
    Next to tune it, hopefully to get better fuel economy, I didn't like the 11.5 km/100 cruising.
    Graham
    Inspiring to read. I have my big install ahead of me this week, and am very apprehensive about everything so its encouraging to read how easy it is.

    I would hope that you'd set the bar a little lower than 11L cruising though.



    Jo

  4. #4
    VIP Sponsor
    Join Date
    Aug 2000
    Posts
    9,562

    Default

    Quote Originally Posted by jo proffi View Post
    Inspiring to read. I have my big install ahead of me this week, and am very apprehensive about everything so its encouraging to read how easy it is.

    I would hope that you'd set the bar a little lower than 11L cruising though.

    Jo
    I didn't say what I was aiming for, just what I was getting.
    Hopefully 9 litres a hundred.
    About the adjustable fuel pressure, no need, all the ECUs I've seen have an overall fuel adjustment.
    Graham

  5. #5
    VIP Sponsor
    Join Date
    Aug 2000
    Posts
    9,562

    Default

    Quote Originally Posted by kingpug500 View Post
    wat stage megasqurit are you running?
    did you have to modify the TFI
    Megasquirt 2.
    What's the TFI?
    Graham

  6. #6
    Tadpole
    Join Date
    Mar 2011
    Location
    Sydney
    Posts
    19

    Default

    Quote Originally Posted by GRAHAM WALLIS View Post
    The car runs but I haven't fitted the vacuum sensing hose to the MAP sensor yet, this will be the hardest part, getting it through the wire wall.
    Depending on how adventurous you are, you can use any old MAP sensor and locate it under the bonnet, and run an extra wire rather than a hose. You have the +5V from the TPS and you have a sensor earth (also from the TPS). All you have to do is calibrate the MAP sensor in the MS software. I worked out how to do this MS1 MSNS Extra.

    For my Toyota powered clubman, I built my MS inside a Toyota ECU case, used all the Toyota sensors so it was a straight plug and play. I realise that may not be the case with your install though

  7. #7
    VIP Sponsor
    Join Date
    Aug 2000
    Posts
    9,562

    Default

    Quote Originally Posted by lmr052 View Post
    Depending on how adventurous you are, you can use any old MAP sensor and locate it under the bonnet, and run an extra wire rather than a hose. You have the +5V from the TPS and you have a sensor earth (also from the TPS). All you have to do is calibrate the MAP sensor in the MS software. I worked out how to do this MS1 MSNS Extra.

    For my Toyota powered clubman, I built my MS inside a Toyota ECU case, used all the Toyota sensors so it was a straight plug and play. I realise that may not be the case with your install though
    Hose or wire, It's the same thing, finding a spot to drill a hole in the fire wall, just a bit of a comment re the clutter under the dash of a S2 505.
    Done now and the car is running well, just need to take it to a dyno for a proper tune.
    Graham

  8. #8
    Real cars have hydraulics DoubleChevron's Avatar
    Join Date
    May 2000
    Location
    Ballarat,Vic,Aust.
    Posts
    16,853

    Default

    Did you add a geared cam wheel to sense flywheel position?

    I would would have thought the 505 would suffer the same issue as the Citroen CX .... that being the factory flywheel sensor(s) use a b@stard tooth count that megasquirt cant' work with. It's possible that megasquirt has been coded these days for all sorts of "tooth numbers"?

    seeya,
    Shane L.
    'Cit' homepage:
    Citroen Workshop
    Proper cars--
    '85 Series II CX2500 GTi Turbo I
    '63 ID19 http://www.aussiefrogs.com/forum/showthread.php?t=90325
    '72 DS21 ie 5spd pallas (last looked at ... about 15years ago)
    '78 GS1220 pallas
    '92 Range Rover Classic ... 5spd manual.

    Yay ... No Slugomatics


    Modern Junk:
    '07 Poogoe 407 HDi 6spd manual

  9. #9
    VIP Sponsor
    Join Date
    Aug 2000
    Posts
    9,562

    Default

    Quote Originally Posted by DoubleChevron View Post
    Did you add a geared cam wheel to sense flywheel position?

    I would would have thought the 505 would suffer the same issue as the Citroen CX .... that being the factory flywheel sensor(s) use a b@stard tooth count that megasquirt cant' work with. It's possible that megasquirt has been coded these days for all sorts of "tooth numbers"?

    seeya,
    Shane L.
    Not using MS ignition yet, so just triggering off the coil as per the original Jetronic.
    You can lock the dissy and trigger the ignition timing from that although a toothed wheel gives a more stable reference.
    Graham

  10. #10
    VIP Sponsor
    Join Date
    Aug 2000
    Posts
    9,562

    Default Tuned

    Got it tuned today.
    It was done by Powerplay, not cheap but no stuffing around and it goes superbly.
    Maybe so well that I don't need to do any mods, so a saving really?
    The fuel map has a peak around 2300, a dip at 3000, then a bigger peak around 4000 before tailing off at the top end.
    Obviously needs to breath better but will rev to close to 7000 now, better than any stock 505 GTi and this is the later unleaded motor.
    Simon, the guy who tuned it, reckons that the head design looks very good (I had one in the boot, used to profile some cams), just needs compression and a better cam.
    Graham

  11. #11
    Fellow Frogger!
    Join Date
    Nov 2005
    Location
    Sunshine Coast
    Posts
    350

    Default

    Quote Originally Posted by GRAHAM WALLIS View Post
    Simon, the guy who tuned it, reckons that the head design looks very good (I had one in the boot, used to profile some cams), just needs compression and a better cam.
    Graham
    So, Peugeot engineers aren't the complete turkeys some assume? Maybe that K&N filter won't suddenly unleash 30bhp from the amazingly poorly designed inlet tract after all?

    I had similar comments on the 205 head from very competent engine builders.

    Tim

  12. #12
    1000+ Posts PeterT's Avatar
    Join Date
    Jul 2000
    Location
    Castle Hill, Sydney
    Posts
    7,568

    Default

    Quote Originally Posted by tcusack View Post
    I had similar comments on the 205 head from very competent engine builders.
    I had exactly the opposite from a well known local head specialist, "fundamentally wrong," they said, "spark plug is on the wrong side"..............

    '92 205 Mi16
    '90 Mi16x4

  13. #13
    VIP Sponsor
    Join Date
    Aug 2000
    Posts
    9,562

    Default

    Quote Originally Posted by PeterT View Post
    I had exactly the opposite from a well known local head specialist, "fundamentally wrong," they said, "spark plug is on the wrong side"..............
    I have had plenty of praise for the XU9 J2 head inlet ports,
    The combustion chambers are of the large type, probably similar to the DFz but with big valves.
    Plugs are in the same spot.
    Graham

  14. #14
    Fellow Frogger! sideways_505's Avatar
    Join Date
    Oct 2010
    Location
    Perth W.A
    Posts
    390

    Default

    Quote Originally Posted by GRAHAM WALLIS View Post
    Got it tuned today.
    It was done by Powerplay, not cheap but no stuffing around and it goes superbly.
    Maybe so well that I don't need to do any mods, so a saving really?
    The fuel map has a peak around 2300, a dip at 3000, then a bigger peak around 4000 before tailing off at the top end.
    Obviously needs to breath better but will rev to close to 7000 now, better than any stock 505 GTi and this is the later unleaded motor.
    Simon, the guy who tuned it, reckons that the head design looks very good (I had one in the boot, used to profile some cams), just needs compression and a better cam.
    Graham
    So basically, the leaded motor.

    I plan to Megasquirt my 505 (manual s2 leaded GTi) so it's good to know it is relatively easy. Although, it's probably due for an engine rebuild, while I'm there I may as well put a turbo on it too. Then I'l need a Quaife LSD and.......

    Oh how things snow ball.

  15. #15
    al
    al is offline
    1000+ Posts al's Avatar
    Join Date
    Dec 2004
    Location
    melbourne
    Posts
    2,016

    Default

    Quote Originally Posted by GRAHAM WALLIS View Post
    I didn't say what I was aiming for, just what I was getting.
    Hopefully 9 litres a hundred.
    About the adjustable fuel pressure, no need, all the ECUs I've seen have an overall fuel adjustment.
    Graham
    That would make a difference. I've basically parked mine up, as i've been doing 120km a day for six weeks and the 205 makes the most sense. It is hard to justify the 505s lack of economy when it is also so much slower. Been getting 500kms+ off 38l in the 205 with plenty of traffic, so can't complain about that.

    I'll drop your allen keys and oil thing in today. First day off since i spoke to you a while back. I'm off for the next month or two now, but have the 405 99% sorted so need to get the 505 onto club rego. Keen for advice when i next see you
    405 Mi16 - Sold - Now back
    205 Mi16
    505 GTi

  16. #16
    Fellow Frogger!
    Join Date
    Nov 2010
    Location
    Blue Mountains, NSW
    Posts
    454

    Default

    Are you running the ms2extra firmware? Running it with overrun fuel cut enabled brought my 505 down to a bit better than 9l/100km on mixed driving. Best I've had is just over 8. No way mine'd rev to 7000 though. Standard exhaust (minus air injection).

    Theoretically, your dyno derived ve table should transfer across (the Extra stuff supports the standard 12x12 tables as well as its default 16x16), but I wouldn't be too sure of that. Probably tweaking the req_fuel would be all that was needed though -- the shape of the surface ought to be much the same. Not hard to load the different firmware and give it a go...

    I agree with you on the ignition. Running off the locked up distributor is acceptable. Beautiful, rock steady and responsive advance -- once you get it started. Starting isn't what it might be. I'll get around to fitting a toothed wheel one day.

    BTW, I also posted a week or two ago about feeding the MS through a relay. Definitely an improvement; all the logs were much more stable. In any case, it's important that the injectors be fed from the same power source as the MS as it uses its input to determine the injector opening time voltage compensation. The voltage from the ignition switch was all over the place.

    Have fun,

    Rob.

  17. #17
    VIP Sponsor
    Join Date
    Aug 2000
    Posts
    9,562

    Default

    Quote Originally Posted by robs View Post
    Are you running the ms2extra firmware? Running it with overrun fuel cut enabled brought my 505 down to a bit better than 9l/100km on mixed driving. Best I've had is just over 8. No way mine'd rev to 7000 though. Standard exhaust (minus air injection).

    Theoretically, your dyno derived ve table should transfer across (the Extra stuff supports the standard 12x12 tables as well as its default 16x16), but I wouldn't be too sure of that. Probably tweaking the req_fuel would be all that was needed though -- the shape of the surface ought to be much the same. Not hard to load the different firmware and give it a go...

    I agree with you on the ignition. Running off the locked up distributor is acceptable. Beautiful, rock steady and responsive advance -- once you get it started. Starting isn't what it might be. I'll get around to fitting a toothed wheel one day.

    BTW, I also posted a week or two ago about feeding the MS through a relay. Definitely an improvement; all the logs were much more stable. In any case, it's important that the injectors be fed from the same power source as the MS as it uses its input to determine the injector opening time voltage compensation. The voltage from the ignition switch was all over the place.

    Have fun,

    Rob.
    No, just standard firmware, would cost even more to tune if we had 16 by 16 points to map!
    The exhaust is not standard but nothing special, still has cat.
    I have never tried using the dissy to trigger mapped ignition, always used 60-2 standard system on XU engines.
    Graham

  18. #18
    Fellow Frogger!
    Join Date
    Nov 2010
    Location
    Blue Mountains, NSW
    Posts
    454

    Default

    Quote Originally Posted by GRAHAM WALLIS View Post
    No, just standard firmware, would cost even more to tune if we had 16 by 16 points to map!
    The exhaust is not standard but nothing special, still has cat.
    I have never tried using the dissy to trigger mapped ignition, always used 60-2 standard system on XU engines.
    Graham
    Yeah, I'm using 12x12 myself and could get by with fewer. The map isn't too lumpy.

    Have you, or anybody else, any suggestions for toothed wheels that will go easily onto the 505 engine? Perhaps some flavour of Douvrin engine came with something workable? Otherwise, I suppose it won't be too hard to get something to fit on the front of the crank pulley -- hard part's overcoming my ingrained lazy streak.

    Oh, and I think kingpug500's question about "TFI" might have meant the air flow sensor. I replaced mine with some stainless-steel pipe with a Ford air-temp sensor in it. I'm guessing you kept yours which saves a bit of messing around.

    But maybe not. If the exhaust doesn't explain it, perhaps my engine's un-revviness (!) is because I still have the standard intake plumbing -- even the pre-cleaner. Then again, maybe I'm just not brutal enough to my engines these days; got it all out of my system in my trusty 504TI a scary number of years ago.

    Have fun,

    Rob.

  19. #19
    VIP Sponsor
    Join Date
    Aug 2000
    Posts
    9,562

    Default

    Quote Originally Posted by robs View Post
    Yeah, I'm using 12x12 myself and could get by with fewer. The map isn't too lumpy.

    Have you, or anybody else, any suggestions for toothed wheels that will go easily onto the 505 engine? Perhaps some flavour of Douvrin engine came with something workable? Otherwise, I suppose it won't be too hard to get something to fit on the front of the crank pulley -- hard part's overcoming my ingrained lazy streak.

    Oh, and I think kingpug500's question about "TFI" might have meant the air flow sensor. I replaced mine with some stainless-steel pipe with a Ford air-temp sensor in it. I'm guessing you kept yours which saves a bit of messing around.

    But maybe not. If the exhaust doesn't explain it, perhaps my engine's un-revviness (!) is because I still have the standard intake plumbing -- even the pre-cleaner. Then again, maybe I'm just not brutal enough to my engines these days; got it all out of my system in my trusty 504TI a scary number of years ago.

    Have fun,



    Rob.
    I think the Fuego has got solid state ignition?
    Have replaced the intake system with a temporary pod inlet, the AFM was still installed before that.
    Didn't seem to make a lot of difference.
    I just need to tidy up the pod and later fit a better system as I intend to use this car for travel and rallies in the outback.
    It sounded pretty brutal on the dyno with the engine sitting continuously on 6000, not as bad as the 205 at 7000 though!
    Graham

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •