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Problems with 11mm pump on a 1.6TD
by
Alcaid
on 15 Jul, 2012 13:55
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Hi,
We're testing my hybrid 1.6TD pump with an 11mm piston (built by Dieselmeken in Sweden) on a friends car, but it's not working correctly as the pressure in one (or more?) of the injector lines does not drop sufficiently to close the injector so the cylinder compression blows up through the injector! The pump is newly built and run in a test bench so that one is working for sure. It's something with the combination of delivery valves, hard lines and/or injectors that doesn't work together the right way.
We've tried both stock 1.6TD injectors and AAZ two stage injectors and it's not working correctly. The 11mm pump head and delivery valves are from the same donor pump, hard lines are stock 1.6TD.
As seen on the video in the link below it foams on injector #2 while the nut is cracked, tightening it again stalls the engine...
http://www.youtube.com/watch?feature=player_embedded&v=1Hxlej30SJg
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#1
by
rallydiesel
on 15 Jul, 2012 17:44
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It's always #2 line, even with different injectors?
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#2
by
libbydiesel
on 15 Jul, 2012 22:01
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Swap that delivery valve with another one and see if the problem moves.
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#3
by
Alcaid
on 16 Jul, 2012 01:02
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With the AAZ injectors the problem moved to injector #3 and #4 so don't think a specific delivery valve is faulty...
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#4
by
Alcaid
on 16 Jul, 2012 05:10
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My friend just found the solution, he had used the banjo fittings from his stock pump and they where not the correct ones for this pump!
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#5
by
R.O.R-2.0
on 17 Jul, 2012 10:47
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My friend just found the solution, he had used the banjo fittings from his stock pump and they where not the correct ones for this pump!
that makes NO SENSE at all..
how did banjo fittings make it not run correctly?
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#6
by
Alcaid
on 17 Jul, 2012 23:58
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My friend just found the solution, he had used the banjo fittings from his stock pump and they where not the correct ones for this pump!
that makes NO SENSE at all..
how did banjo fittings make it not run correctly?
Agreed! Not much difference to them but Dieselmeken who built the pump gave us this tip, and it worked.
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#7
by
Harky
on 18 Jul, 2012 12:54
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Out banjo? It helps control the internal pump pressure does it not?
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#8
by
Alcaid
on 20 Jul, 2012 09:50
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It was the banjo on the return line that was changed
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#9
by
R.O.R-2.0
on 21 Jul, 2012 10:43
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It was the banjo on the return line that was changed
so, you guys had the wrong OUT bolt in the pump.. right?
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#10
by
Alcaid
on 21 Jul, 2012 12:15
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It was the banjo on the return line that was changed
so, you guys had the wrong OUT bolt in the pump.. right?
Yep, the out bolt of a 9mm pump just didn't do the job right with the 11mm pump
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#11
by
Harky
on 22 Jul, 2012 04:09
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I'm using a 9mm OUT bolt on an 11mm (albeit Peugeot) pump.
AFAIK the OUT bolt helps regulate the Internal Pump Pressure, are you by any chance using the 11mm pressure regulator?
Good its all sorted now anyway though
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#12
by
Alcaid
on 22 Jul, 2012 04:24
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I'm using a 9mm OUT bolt on an 11mm (albeit Peugeot) pump.
AFAIK the OUT bolt helps regulate the Internal Pump Pressure, are you by any chance using the 11mm pressure regulator?
Good its all sorted now anyway though
To be honest, I don't know what parts has been used. I sent a 9mm VW GTD (80hp) pump and an 11mm pump from a Kia to Dieselmeken in Sweden and asked him to make me a 200hp pump
He has previously dynoed 200hp with 110cc of fuel, my pump was capable of 130cc in the flow test bench
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#13
by
snakemaster
on 25 Jul, 2012 16:33
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that pump wants the bolt from the 9mm pump , as the other one will make to much Internal Pump Pressure and it could sit on the revs to, what cam plate is the pump running