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Vw flat four

Posted: Sun Mar 26, 2017 1:56 pm
by Boardpaul
Evening guys,
Does anyone have a start up map for a type1 engine?
It's a 2276 running twin throttle bodies with 10.5-1 compression ratio.

Thanks

Paul

Re: Vw flat four

Posted: Mon Mar 27, 2017 4:07 am
by Alex DTA
If you send over a crank scope, or let me know the sensor position, I can sort something out.

Re: Vw flat four

Posted: Wed Mar 29, 2017 2:20 am
by Boardpaul
Thanks Alex, When I can get it sorted I will get you a crank scope.

Re: Vw flat four

Posted: Mon Apr 24, 2017 2:41 pm
by Boardpaul
Well its taken some time, but it looks like I'm nearly ready to fire it.

Is the map looking right for an initial startup?

Re: Vw flat four

Posted: Tue Apr 25, 2017 4:06 am
by Alex DTA
Close, but not quite.
You're having some drop outs, you can see the gaps in the yellow lines.

You need to move the crank sensor a touch closer, based on that.
When it's correct, you should see the number 35 a few times across the top of the scope, not all the random numbers you're seeing now.

Re: Vw flat four

Posted: Tue Apr 25, 2017 5:36 am
by Boardpaul
Thanks Alex.

Once I sort that would I be able to start that using the map I have set up?

Re: Vw flat four

Posted: Tue Apr 25, 2017 7:11 am
by Alex DTA
It should certainly be close.

Re: Vw flat four

Posted: Tue Apr 25, 2017 1:56 pm
by Boardpaul
well, its cranking but thats as far as I can get it.

Can you provide a base map from the new crankscope?

How can i work out degrees from BTDC using the crankscope?

Re: Vw flat four

Posted: Tue Apr 25, 2017 4:39 pm
by stevieturbo
mising tooth position can be got very close, simply by looking at where your sensor is in relation to the missing tooth and TDC.

Then when running, verify timing is all good with a timing light. Or you might be able to do this at cranking speeds.

Re: Vw flat four

Posted: Wed Apr 26, 2017 3:39 am
by Alex DTA
Based on the scope, 60 or 240 degrees should work.
Start with 60.

Also make sure the ECU is synchronising: