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2 Posts Member #: 8978 Junior Member |
8th Jul, 2010 at 01:26:40am
so i can finally get my megajolt to communicate with my computer, now im having a issue tunning it. i placed the missing tooth on a 36-1 wheel 90 degrees ahead of the keyhole on the pulley(tdc right). now iv tried 15 or so maps off of autosports site, and the only map where i can rev past 1200rpms is the starting map but its really sluggish. does anyone where i screwed up and how i cna fix this? |
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1394 Posts Member #: 1346 Post Whore bromsgrove |
8th Jul, 2010 at 07:23:51am
do you have pip and saw the right way round, easy mistake to have. do you have a timing light to help set up the timing |
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 (2)[/url] by [url=https://www.flickr.com/photos/150672766@N03/]Rod Sugden[/url], on Fli) 5988 Posts Member #: 2024 Formally Retired Rural Suffolk |
8th Jul, 2010 at 07:37:25am
Not sure about your description of the missing tooth position - the keyhole on the pulley is irrelevant, it's the position of the mising tooth relative to the VR sensor that matters and that will depend on where you have mounted the sensor (missing tooth should be 90 degrees after the sensor at TDC or, put another way, the missing tooth passes the sensor 90 degrees before TDC).
Schrödinger's cat - so which one am I ??? |
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90 Posts Member #: 7555 Advanced Member |
8th Jul, 2010 at 07:25:38pm
I think you need to find TDC and ignore the keyway... |
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 4637 Posts Member #: 20 My sister is so fit I won't show anyone her picture Lake District |
8th Jul, 2010 at 08:18:56pm
On 8th Jul, 2010 Midas said:
I think you need to find TDC and ignore the keyway... My thoughts exactly. You can't rely on the keyway to be a true TDC. You need to find an accurate TDC, you then need to find 90 deg BTDC & align the missing tooth & the crank sensor. The sensor needs to see the missing tooth 90 deg before the engine reaches TDC. |
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 1050 Posts Member #: 764 Post Whore Staffordshire |
9th Jul, 2010 at 10:06:01am
I second comments already made, keyway has nowt to do with it.
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2 Posts Member #: 8978 Junior Member |
23rd Jul, 2010 at 02:03:08am
i tried going off of the timing mark(about-20 degrees off of the keyway) the engine wont run. I think im going to assume the tdc is 10+ off of keyway. It ran when i used the keyway as tdc and i could rev it up when i advanced it 5 degree's. |
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1394 Posts Member #: 1346 Post Whore bromsgrove |
23rd Jul, 2010 at 07:34:41am
On 23rd Jul, 2010 plunger said:
i tried going off of the timing mark(about-20 degrees off of the keyway) the engine wont run. I think im going to assume the tdc is 10+ off of keyway. It ran when i used the keyway as tdc and i could rev it up when i advanced it 5 degree's. you need to actually find tdc rather than assuming and need a timing light. this link may help http://www.turbominis.co.uk/forums/index.php?p=vt&tid=135459 Edited by philc on 23rd Jul, 2010. |
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90 Posts Member #: 7555 Advanced Member |
23rd Jul, 2010 at 09:14:46pm
On 23rd Jul, 2010 plunger said:
i tried going off of the timing mark(about-20 degrees off of the keyway) the engine wont run. I think im going to assume the tdc is 10+ off of keyway. It ran when i used the keyway as tdc and i could rev it up when i advanced it 5 degree's. This isn't the time to assume. Find true TDC and go from there with close reference to the installation instructions on the Autosport Labs website. While you are sorting it out go back to the default map rather than something that someone else has arrived at. If you are using a turbo and MAP, is it set to turbo or NA? Edited by Midas on 23rd Jul, 2010. |
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