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Thread: Mi16 Cam Swap

  1. #1
    Fellow Frogger! Jason20's Avatar
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    Default Mi16 Cam Swap

    I've have had one of PeterT's re-ground cams installed in my series1 405 Mi16 as of yesterday & am very happy with the results!

    I'll give a full description once I've had time to test drive it more, I haven't had time to really examine the changes, but from a quick run last night it instantly felt more powerful down low, quicker accelaration & a bit more responsive in all gears. The idle is still the same, the car is a bit louder.

    If anybody is considering doing it, I recommend so. Kaiser seems to be happy with his & got 15% power increase, although he has done a couple of other mods.

    Mine was stock bar the exhaust, 2 1/4" cat back.
    It will be interesting to see what I get on the dyno.

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    Jason
    Last edited by Jason20; 15th April 2004 at 05:37 PM.

  2. #2
    Fellow Frogger! sproose16v's Avatar
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    Jason

    Might i ask how much did it set you back to purchase the cams?

    Cheers

  3. #3
    Fellow Frogger! Jason20's Avatar
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    as PeterT has them advertised, for $250. plus exchange for my old cam.

  4. #4
    Fellow Frogger! sproose16v's Avatar
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    Looks ver good. ANd your Mi16 is stock as a rock? No aftermarket ECU just the cat back? Ill keep checking back to look for the DYNO report!

    Cheers

  5. #5
    Fellow Frogger! Jason20's Avatar
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    yep stock ecu, the cat back zorst is the only change.

  6. #6
    Fellow Frogger! kaiser's Avatar
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    Good to hear you're happy with the results Jason

    Ky

    Ps guess what I've got

  7. #7
    Fellow Frogger! Jason20's Avatar
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    Quote Originally Posted by kaiser
    Good to hear you're happy with the results Jason

    Ky

    Ps guess what I've got
    Actually, now that I've had more time to test it my feelings have changed a bit...
    I think my judgement was clouded by the excitement of the whole thing... hmmm, definately feels better down low, but up top it doesn't feel any better, if anything a tad worse.. it is a little more responsive in gears, but nothing major. ahh well... I'll still get it dynoed to check... well I guess theres a risk with everything. it's a shame though as there was alot of hard work & money to get the bugger installed. Well, I guess it does feel better down low...

    what did you get Ky???

  8. #8
    1000+ Posts PeterT's Avatar
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    What you're probably experiencing is a much wider power range. An Aussie spec. Mi16 feels exciting because the power comes on hard at 4000 after a flat spot in the torque curve. The heavier the car, the more pronounced this peak is. The UK spec. car in comparison, doesn't have that peak and people think they aren't that impressive after driving the Aussie car. The reality is of coarse, they have got to 4000 RPM a lot quicker because of the flatter torque curve. I think Ky thought the same thing. Certainly Owen did when he drove Ky's car. The dyno reveals all though.

    '92 205 Mi16
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  9. #9
    Fellow Frogger! Jason20's Avatar
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    Quote Originally Posted by PeterT
    What you're probably experiencing is a much wider power range. An Aussie spec. Mi16 feels exciting because the power comes on hard at 4000 after a flat spot in the torque curve. The heavier the car, the more pronounced this peak is. The UK spec. car in comparison, doesn't have that peak and people think they aren't that impressive after driving the Aussie car. The reality is of coarse, they have got to 4000 RPM a lot quicker because of the flatter torque curve. I think Ky thought the same thing. Certainly Owen did when he drove Ky's car. The dyno reveals all though.

    Possibly, I just went and got a dyno at hills motorsport...

    68kw at the wheels...
    airfuel mix: 11.46

    he said its running quite rich for an NA car

    I'll try scanning the dyno sheet

  10. #10
    Fellow Frogger! MYT205's Avatar
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    That is alarmingly low.

    There is something wrong there.

  11. #11
    Fellow Frogger! Jason20's Avatar
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    Quote Originally Posted by MYT205
    That is alarmingly low.

    There is something wrong there.

    tell me about it.... what do these have at the wheels stock. surely its more than 68kw

  12. #12
    Fellow Frogger! Jason20's Avatar
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    im trying to upload the graph, its 1.6mb is that too big?

  13. #13
    2000+ Brad's Avatar
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    Yeah, did they give it to you as a picture? If so you can reduce the size and quality of it. If it's a pdf there are some things you can also do with that. PM me and I'll give you my email address and Ill take a look and post it.
    B to the R to the A from the D
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  14. #14
    Fellow Frogger! Jason20's Avatar
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    Could the dyno be telling lies?

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    1000+ Posts PeterT's Avatar
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    Quote Originally Posted by Jason20
    Possibly, I just went and got a dyno at hills motorsport...

    68kw at the wheels...
    airfuel mix: 11.46

    he said its running quite rich for an NA car

    I'll try scanning the dyno sheet
    Yes, that's mega rich. You should be seeing at least 80kW and 12.5:1

    '92 205 Mi16
    '90 Mi16x4

  16. #16
    Fellow Frogger! Jason20's Avatar
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    How can I lean it out? is it the airbox?? or it the airflow meter playing up??

  17. #17
    Fellow Frogger! Jason20's Avatar
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    just put the pod back on my car and it seems to have removed the cork from the engines ass!!! f**k me, it hammers now!!!
    don't be knocking the pods, the stock airbox is a piece of steaming s**t!!
    now I wish i changed it before the dyno!

  18. #18
    Fellow Frogger! kaiser's Avatar
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    Jason

    Did you get a before dyno? It sounds to me that like my car, the AFM is not allowing enough air thru at high revs, possibly a worn spring? This means the miture tends to be on the rich side. With mine it was rich before and after the cam, which tells me something else is wrong, rather than the cam. I'm no expert but I'm sure that if we could fix the mitures, we'd both find a few extra Kw.

    Talk to you soon

    Ky

  19. #19
    1000+ Posts N5GTi6's Avatar
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    Quote Originally Posted by Jason20
    Possibly, I just went and got a dyno at hills motorsport...

    68kw at the wheels...
    airfuel mix: 11.46

    he said its running quite rich for an NA car

    I'll try scanning the dyno sheet
    At what revs was this A/F ratio recorded? - 2000rpm, 4000rpm, 6000rpm - the dyno graph doesn't actually say. If it's an average then that figure is next to useless to anyone.
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  20. #20
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    Will this cam fit on a series 2 motor????

    If so can some one pm me the details.

    Cheers

    Tim

  21. #21
    Fellow Frogger! Jason20's Avatar
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    I think the 11.46 was the ratio at peak power, the lowest was like in the 10's...
    The dyno graph is pretty shoddy.

  22. #22
    Fellow Frogger! Jason20's Avatar
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    Ky, Is there a way of checking the spring in the AFM? I took it off and played around with it a bit, the flap seemed to be moving smoothly and springing back into place..

    haha, when I was fiddling with the AFM yesterday, I forgot to plug it back in, drove down the road & the car shat itself! Couldn't work out what happened ohh whoops, left the plug off. I guess it must be working to some extent.

    I think my cars running rich mainly because it's starving for air, when I got it dynoed I had the stock box on, without the pipe that feeds air from the front grill. Now that I've put the k & n pod back on it seems to be alot better..

    I cant believe it though 68kw? if the stock spec is 108kw
    thats like 40% power loss through the driveline.

    the guy did two runs, the first only for 59kw...
    second run it jumped like 9kw.. It seemed kinda strange.
    the guy said that my exhuast sounds like its leaking... But I took it to an exhaust centre a while ago & they said it seems fine.

  23. #23
    1000+ Posts PeterT's Avatar
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    Quote Originally Posted by TimMi16
    Will this cam fit on a series 2 motor????

    If so can some one pm me the details.

    Cheers

    Tim
    Yes it fits either XU9J4 or XU10J4 engines. Cost is $250 exchange, $100 deposit. PM me if you'd like more details.

    '92 205 Mi16
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  24. #24
    1000+ Posts PeterT's Avatar
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    Quote Originally Posted by Jason20
    I think the 11.46 was the ratio at peak power, the lowest was like in the 10's...
    The dyno graph is pretty shoddy.
    Ideally, the mixtures should never drop under 12.5:1. Full throttle, from 2000 onwards should be 13:1 - 12.5:1. Cruise mixtures should be 14.7:1, and the rest in between. A mixture like 10:1 is just sick on a NA engine.

    It's possible that someone fiddled with the flap tension when they fitted the pod. Bring it around, I'm confident I can get it right with either setup.

    When getting a dyno, you need to ask for the mixtures and power on the same graph.
    Last edited by PeterT; 18th April 2004 at 01:17 PM.

    '92 205 Mi16
    '90 Mi16x4

  25. #25
    Fellow Frogger! Jason20's Avatar
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    After a few minutes in Peter's workshop yesterday, the car is feeling fantastic!

    He swapped my air flow meter with one of his, we took it for a test drive and it felt alot better.

    Then he noticed my knock sensor wasn't plugged in!!!
    Which is why my check engine light & diagnostic light have been on since I had the engine installed (approx 1.5 years ago)
    This is why the engine was running so rich..
    he got it plugged back in & the warning lights then turned off after reseting the ecu.

    I drove it home and it felt nice & solid. I noticed the idle was alot more stable. but i didnt really expect it to do alot more as the car felt pretty darn good as it was.

    but was i wrong!!!

    later on at night I went to the servo to pump the tires a little, gave it some gas out of the servo &....

    I nearly shat myself. The car just took of like a rocket!!! the knock sensor must have had time to settle back in and re-adust the fuel mixtures.
    I gave it a few more tests to be sure, and yep! the difference was amazing!

    can't wait to get another dyno test, I'm expecting alot more than 68kw this time around.



    Thanks to Peter!

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