Injector location between the IDI and TDI heads

This forum is for TDI (Turbo Direct Injection) questions/posts. Non-TDI Motors (Including the 1.6, and 1.9 or other variant turbo diesel motors) should go in the VW Diesel General Forum

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dalek
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Injector location between the IDI and TDI heads

Post 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?
joat
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Re: Injector location between the IDI and TDI heads

Post 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. :?
1992 Jetta (gasser to TD 1.6)
2000 TDI Jetta
1990 Jetta (Gasser RIP @ 875,000Km)
1976 Rabbit (RIP)
1972 Superbeetle (RIP)
1971 Fastback (type 3 RIP)

A pessimist is a well informed optimist
dalek
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Re: Injector location between the IDI and TDI heads

Post 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.
Fatmobile
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Re: Injector location between the IDI and TDI heads

Post 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
'91 Golf gasser converted to turbo diesel.
'83 Rabbit gasser, converted to diesel, then converted to run on vegetable oil.
2, '84 GTI projects cars
joat
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Re: Injector location between the IDI and TDI heads

Post by joat »

sorry if I confused any one :oops:
1992 Jetta (gasser to TD 1.6)
2000 TDI Jetta
1990 Jetta (Gasser RIP @ 875,000Km)
1976 Rabbit (RIP)
1972 Superbeetle (RIP)
1971 Fastback (type 3 RIP)

A pessimist is a well informed optimist
ricosuave
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Re: Injector location between the IDI and TDI heads

Post by ricosuave »

Now: 00 Golf TDI, 03 Jetta Wagon TDI - :)
Then: 69 SC Transporter, 84 Rabbit GTI, 87 Fox GL, 91 Golf IDI, 97 Jetta IDI - :|
"Everything I save by driving diesel I put back due to poor German engineering and crappy Mexican workmanship!" :(
Vincent Waldon
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Location: Edmonton, Alberta, Canada

Re: Injector location between the IDI and TDI heads

Post by Vincent Waldon »

That's some good stuff right there. ;-)
Vince

Edmonton, Alberta, Canada
2001 silver TDI Jetta Malone Stage 1.5 , 2001 blue TDI Jetta SBIII 216s Malone Stage 3
1970 Bay Window bus

Gone but not forgotten: 1969/1971 Beetles, 1969/1974 Westies, 1979 Rabbit, 1986 TD Jetta, 1992 gas Jetta, 1994 TD Jetta

Here's a small collection of HOW-TOs
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