NefMoto > Technical > Tuning > ME7.5 running without camshaft sensor - possible?
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Author Topic: ME7.5 running without camshaft sensor - possible?  (Read 17968 times)
alexs307
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« on: January 23, 2017, 02:25:06 PM »
As described in this topic, http://nefariousmotorsports.com/forum/index.php?topic=12051.0title=, I would like to know if it is possible to run ME7.5 "at full power" without camshaft sensor. Will DTC erase be enough to disable limp mode and how the missing camshaft sensor will affect proper running of ME7.5?
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Jim_Coupe
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« Reply #1 on: January 25, 2017, 01:48:58 PM »
I think its there for sequential fuel.. Can you even start the car without it ?  Are you going to use the ECU on a diffrent engine?
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prj
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« Reply #2 on: January 25, 2017, 04:01:56 PM »
You need a standalone ECU if you don't want to use the original one.
Also, camshaft sensor is needed for phasing!

How would it know which phase the engine is in otherwise?

I mean technically, you can run batch fuel and wasted spark, but the ECU is not meant to do that.
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alexs307
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« Reply #3 on: January 25, 2017, 06:55:15 PM »
@Jim - yes, indeed, as stated in link, I am planning to use this ecu on Opel 2.0T.

It takes little bit longer to start the engine without camshaft sensor, but it starts. Just that you have limp mode and limp RPM limit @4000rpm, if I am not mistaking.

@prj - I will not use a stand alone ecu, there is no challenge in installing+using stand alone, more than this, when I initially got the car, ex owner fitted Haltech Platinum...it was the first thing to remove before fitting back Me1.5.5 original ecu and restoring the original wiring. I specifically want to convert to ME7.5 for several reasons.

Today I think I may have found a way to mechanically reproduce 1.8T cam trigger pattern on the original Z20LET cam trigger. I guess this cam trigger cannot be changed in ME7.5, as same as the crank trigger offset cannot be changed. So probably I must  find a way to solve this camshaft trigger issue just mechanically.
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Jim_Coupe
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« Reply #4 on: January 26, 2017, 07:47:31 AM »
Why not run an Opel 2.0T Me7.6?  Same tuning as Me7.5 Smiley   
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E85oholic
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« Reply #5 on: January 26, 2017, 09:03:58 AM »
Why not just fit a cam sensor?
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sonique
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« Reply #6 on: January 26, 2017, 03:45:42 PM »
i think because need modification the cams

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Jim_Coupe
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« Reply #7 on: January 26, 2017, 03:48:07 PM »
Ah now i understand you are going to put it ON an 2.0T not an 1.8T in an opel Smiley  intressting,, im building an Mercedes 190 with an 2.2 x22xev ecotech... I will run SAAB Trionic 5 on that.. But if you get me7.5 working im intressted Smiley
« Last Edit: January 26, 2017, 03:57:58 PM by Jim_Coupe » Logged
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Jim_Coupe
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« Reply #8 on: January 26, 2017, 03:51:36 PM »
There are 2 diffrent trigger wheels.. the one to the left is whats on my Me7.5 Does the crank trigger wheel line up the same as OPEL?  60-2 with VR trigger.. I think Ecotech uses a HALL sensor?
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Jim_Coupe
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« Reply #9 on: January 26, 2017, 03:59:51 PM »
Hers my project.. im intressted in what you come up with, If you got this to work im very intressted Smiley

« Last Edit: January 26, 2017, 04:01:31 PM by Jim_Coupe » Logged
E85oholic
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« Reply #10 on: January 27, 2017, 07:48:31 AM »
Quote from: sonique on January 26, 2017, 03:45:42 PM
i think because need modification the cams



Where there is a will, there is a way.
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TijnCU
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« Reply #11 on: January 27, 2017, 10:40:16 AM »
On the timing belt cover you could make the cam sensor, and mount the trigger wheel on the cam gear with the bolt that goes in the camshaft.
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alexs307
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« Reply #12 on: January 27, 2017, 10:51:00 AM »
Glad I've finally got your interest. Smiley

ME7.6.2 is not wideband - and harware is weak (hybrid ecu), same as in Me1.5.5 - often causing ECU failure.

Yes, I am trying to convert 2.0T from Opel to ME7.5 electronics.

The crank trigger wheel is easy job. Either drill new hole in the block and fit the sensor in same position as in 1.8T, or turn the trigger wheel in relation to the crankshaft - offset is different in 1.8T (22teeth) compared to 2.0T (16 teeth)

We cannot install the camshaft onto the timing belt cover, it's made from plastic, it moves, it's not tight, not precise, so no solution.

What I am thinking right now is reproduce the 1.8T camshaft trigger pattern on the 2.0T camshaft sprocket, which has the role of being camshaft trigger at same time. The pattern is different, 1.8T has 4 teeth, while the 2.0T is half full/half empty.

More than this, camshaft trigger is located on the exhaust cam (Opel), while in 1.8T is on the intake cam.
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alexs307
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« Reply #13 on: January 27, 2017, 10:57:04 AM »
If someone with 1.8T having no VVT (but mechanical tensioner) could tell us the precise points the sensor reads on camshaft trigger for each cyl 1-2-3-4 at TDC, it can be easily reproduced on the Opel trigger wheel.

I've recently sold my 1.8T BAM S3, which had mechanical chain tensioner fitted on AEB head instead of classic VVT, but at that moment I had no interest in doing these measurements. I think I must get in touch with new owner to ask him to allow us to make the tests.
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Jim_Coupe
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« Reply #14 on: January 28, 2017, 09:38:43 AM »
Drill in the block and fit the sensor hmmm.. That not JUST to drill... You need it t be in exakt length in mm from the trigger whell aswell..  Does Me7.5 have a "Global Ignition angles Offset faktor..  Then you can use stock VR sensor... Just edit globa faktor for ing and strobe the engine. For the cam sensor I agree its hard to use the timing belt cover..  What about drilling into the head an use an M10 industrial hall sensor that triggers on the cam shaft. maybe there is a way to but that cam wheel inside the head around the camshaft. or reconstruct that wheel some how..


Anyone here knows if Me7.5 have Global ign offset factor?
« Last Edit: January 28, 2017, 09:42:52 AM by Jim_Coupe » Logged
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