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Injector location between the IDI and TDI heads
Posted: Sun Jul 12, 2009 9:00 am
by dalek
When VW made the TDI head, did it move the location where the precombustion chamber exited the head to put the TDI injector? Ok, this may not make much sense, so let me rephrase it: if you have an IDI and a TDI head and flip them upside down, is the distance between the injector hole and the closest edge of the head (or piston center) in the TDI different than the distance from the precombustion chamber hole and the piston center/whatever?
Re: Injector location between the IDI and TDI heads
Posted: Fri May 13, 2011 8:38 pm
by joat
true TDI ' s don't have precups and the injectors extend down into the TDI piston recess instead. .. you can't bolt on a TDI head to an IDI block... the injectors will hit the pistons
and using a IDI head on a TDI block with TDI pistons will lower pressures too low to fire.
Re: Injector location between the IDI and TDI heads
Posted: Sat May 14, 2011 8:20 am
by dalek
Thank you for the assumption on my objective and for the explanation on the intricacies of IDI vs DI (TDI included) diesel engine design, but unfortunately I fail to see the relationship of your answer to my question.
Re: Injector location between the IDI and TDI heads
Posted: Sat May 14, 2011 10:01 pm
by Fatmobile
If you get a chance to look at a TDI piston, you'll notice the bowl in the center.
According tot he previous post the nozzle sticks into this bowl.
If you get a chance to look at an IDI head; you'll notice the prechamber is off to the side.
So,...
no,
they aren't even close to the same area of the combustion chamber.
That might have answered it
Re: Injector location between the IDI and TDI heads
Posted: Thu May 19, 2011 9:07 am
by joat
sorry if I confused any one
Re: Injector location between the IDI and TDI heads
Posted: Sat Aug 13, 2011 7:19 am
by ricosuave
Re: Injector location between the IDI and TDI heads
Posted: Thu Aug 18, 2011 11:43 pm
by Vincent Waldon
That's some good stuff right there.
