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Home > Help Needed / General Tech Chat > Quick idiots check re timing wheel & tdc

Will

162 Posts
Member #: 11091
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Ok Iíve got mappable ignition and bought a timing wheel on eBay a while ago and the crankshaft sensor bracket separately
Life got abit crazy and before I could properly finish the car I was losing my work space so over a few days I chucked it all together and put it in storage for a few years as you do!
Anyway workshop back and;

TDC is top of piston 1 with both valves shut on power stroke
Lines up nice with the pulley which is a plus but not what Iím going on

And the crankshaft sensor should be 90 degrees before TDC?

Currently looks like this;
Am I right in thinking new bracket needed or whatís everyoneís thoughts


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Will

162 Posts
Member #: 11091
Advanced Member

Oh yeah and Iím running nodiz with map sensor which I know isnít a popular choice here but it was cheap haha


Tom Fenton
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15218 Posts
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Fearless Tom Fenton, Avon Park 2007 & 2008 class D winner

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TM legend.

Rotherham South Yorkshire

Who machined the pulley? Looks a lot like one of mine. If it is, the sensor is in the wrong place!
Have a look where the missing tooth is in comparison to the keyway.


On 29th Nov, 2016 madmk1 said:


On 28th Nov, 2016 Rob Gavin said:
I refuse to pay for anything else


Like fuel 😂😂


Will

162 Posts
Member #: 11091
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Honestly just bought it on eBay a while back
Is a solid bit of kit! And if youíve got a spare bracket knocking around!
So 36 - 1 should be placed about 9 teeth in ?


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Joe C

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Carlos Fandango

Burnham-on-Crouch, Essex

Missing tooth should be 90 deg 9 teeth round from the sensor.

This is so the tooth passes the sensor and gives enough time for the ecu to do the calculation and still get all the advance in which could be 40 odddegrees at pat throttle. So with your set up you want the missing tooth somewhere around 10 oclock

On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1

https://joe1977.imgbb.com/



Turbo Phil

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My sister is so fit I won't show anyone her picture

Lake District

You can have your sensor and bracket positioned anywhere as long as the sensor sees the missing tooth when the engine is 90deg BTDC.

Phil.

WWW.TURBO-MINI.COM


Will

162 Posts
Member #: 11091
Advanced Member

Ok hereís where the sensor is now, have spark, have fuel - still not running *frown*
Any ideas?
Shall I upload a picture of the map?

Bpr6es spark plugs


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Edited by Will on 5th May, 2019.


Will

162 Posts
Member #: 11091
Advanced Member

Hang about, if the engine rotates clockwise at that end surely before TDC would be nine teeth the other way?


Tom Fenton
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15218 Posts
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Fearless Tom Fenton, Avon Park 2007 & 2008 class D winner

&

TM legend.

Rotherham South Yorkshire

you need to establish where the missuing tooth is in relation to the keyway of the crankshaft.


On 29th Nov, 2016 madmk1 said:


On 28th Nov, 2016 Rob Gavin said:
I refuse to pay for anything else


Like fuel 😂😂


Will

162 Posts
Member #: 11091
Advanced Member

Thanks for your help
Attached a pic


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Will

162 Posts
Member #: 11091
Advanced Member

Very difficult to get a good picture haha!
Halfway there to replacing the wheel now either way 🙄😂


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Will

162 Posts
Member #: 11091
Advanced Member

proof i do use the search button haha!

On 14th Jul, 2011 Tom Fenton said:
No. The bracket is at 90 deg before. So put the missing notch at TDC aligned with keyway.


new wheel time? im baffled

im thinking just get a new trigger wheel, mount it to stock crank pulley
TDC - mount the bracket where it was and cut out the tooth 9 anti clockwise away from the sensor

Edited by Will on 5th May, 2019.


Tom Fenton
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15218 Posts
Member #: 337
Fearless Tom Fenton, Avon Park 2007 & 2008 class D winner

&

TM legend.

Rotherham South Yorkshire

The keyway is in line with no 1 & 4 TDC on the crank. Looking at your photo the keyway is not far off 90 before TDC when you took the photo- turn the crank maybe 10-15 degrees further clockwise so that the keyway is pointing to 9 o clock and that is 90 deg before TDC, and wherever the missing tooth is, is where your sensor needs to be.
In this case it puts your sensor in a really wank position. No idea why someone would machine the pulley like that but it leaves the sensor needing to be in a really inaccessible if not impossible due to the engine mount location.

The pulley and bracket I do puts the missing tooth in line with the keyway, and the sensor at 9 oíclock. All bolts straight on with no messing about.


On 29th Nov, 2016 madmk1 said:


On 28th Nov, 2016 Rob Gavin said:
I refuse to pay for anything else


Like fuel 😂😂


R.Rodrigues

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Algarve/Portugal

Place the sensor on the bracket you have, rotate the pulley to 90deg BTDC, mark and machine a new keyway on the pulley if it look safe?


Will

162 Posts
Member #: 11091
Advanced Member

So Iíve been gifted a timing wheel for an a series, marked the keyway position that falls between two teeth, does it go 9 before then gap or is it 8 then gap to mark 90 degrees haha


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