The whole 1.9 head on a 1.6 block thing?

[RabbitJockey]

i think the drop in compression and larger chamber also reduces the velocity of air entering the precombustion chamber, which im sure doesn't help with starting and smoke, how ever a franken engine thats put together with a fresh bottom end, and a fresh head will have around 400psi of compression, which is well with in the health range of a 1.6, and when theyre put together fresh they dont smoke much, if at all.

[Bugsy_malone 666]

It is not the 'precups' (inserts) that make the difference, it is the volume of the precombustion chambers and the increased surface area.  The volume of the precombustion chamber is sized proportional to the displacement of the engine.  Placing the head with larger chambers on a block with smaller displacement significantly drops compression. 

The use of 1.6 or 1.9 injectors will not make any significant difference in the ease of starting or the amount of smoke.  They will change the sound of the engine some.

If you are planning BIG boost and don't care if it's hard to start and excessively smoky, go for it.  Otherwise, buying a less expensive part that won't work vs. buying a more expensive part that will work doesn't make a whole lot of sense to me.

Interestingly I have been doing some research into other engines and the whole compression ratio thing: Fordson Dexta Tractors have a 3cylinder perkins Diesel engine (2.3 and 2.5litre!) which have precombustion chambers, pistons that look almost identical on the top to the VW ones and they apparently run a compression ratio of 16.5:1. I have never know fordson tractors smoke all that much unless they have worn injectors (the injectors dribble) so I am wondering if the frankenengine setup may actually be down to the injector firing pattern or something simple like that?

I had looked at the other thread about the 1.6/1.9 combo in a suzuki 4x4 and timing seemed to be the main issue, once the timing was advanced it ran alot better although it seemed like the engine wasnt running on full.

[RabbitJockey]

issue with that engine was worn block or head, not enough compression because of worn parts.

[burn_your_money]

Why not just drop in a whole AAZ motor? Seems faster, easier and cheaper.

[libbydiesel]

I am wondering if the frankenengine setup may actually be down to the injector firing pattern or something simple like that?

It isn't.

I had looked at the other thread about the 1.6/1.9 combo in a suzuki 4x4 and timing seemed to be the main issue, once the timing was advanced it ran alot better although it seemed like the engine wasnt running on full.

There isn't one other thread on the subject.  A lot of people have done the combo and there are several threads on this forum alone.  Good luck.

[Ian0391]

What do you guys think would have more power potential? A franken motor or a full aaz?

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[Dub_monster]

so question, I have a current motor I've built and am having trouble getting started everything is new except for the injection pump and injectors. the injectors are 1.6. my question is I have a 1.6 hydro block and dropped a AZZ head on it, the piston protrusion called for a two notch gasket but that's for a 1.6 head... but I didn't see an issue with that. but currently I'm getting blow back into my intake manifold leading me to think I have an issue with my lift timing on the cam being its a 1.9 hydro cam, would this cause an issue, should I put a 1.6 hydro cam on?? 

[Bugsy_malone 666]

What do you guys think would have more power potential? A franken motor or a full aaz?

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Full AAZ. Franken motor ideas I think probably work out as cheaper, but the AAZ has a longer stroke and apparently in standard from are worlds apart from a 1.6td.

[Bugsy_malone 666]

so question, I have a current motor I've built and am having trouble getting started everything is new except for the injection pump and injectors. the injectors are 1.6. my question is I have a 1.6 hydro block and dropped a AZZ head on it, the piston protrusion called for a two notch gasket but that's for a 1.6 head... but I didn't see an issue with that. but currently I'm getting blow back into my intake manifold leading me to think I have an issue with my lift timing on the cam being its a 1.9 hydro cam, would this cause an issue, should I put a 1.6 hydro cam on?? 

You shouldnt get blow back, Have you set the timing on your cam correctly? eg did you undo the pulley wheel on the cam, lock the cam to its position on the back of the head and set it all up like you would with the 1.6?

[Dub_monster]

so question, I have a current motor I've built and am having trouble getting started everything is new except for the injection pump and injectors. the injectors are 1.6. my question is I have a 1.6 hydro block and dropped a AZZ head on it, the piston protrusion called for a two notch gasket but that's for a 1.6 head... but I didn't see an issue with that. but currently I'm getting blow back into my intake manifold leading me to think I have an issue with my lift timing on the cam being its a 1.9 hydro cam, would this cause an issue, should I put a 1.6 hydro cam on?? 

You shouldnt get blow back, Have you set the timing on your cam correctly? eg did you undo the pulley wheel on the cam, lock the cam to its position on the back of the head and set it all up like you would with the 1.6?

I did lock the cam into its correct position and timed it the same way I would with the 1.6 with the cam gear loose pump pinned and at tdc, I'm going to do a compression test tomorrow, and see if that tells me anything. :/ I am only getting blow back too when it starts to fire which is odd to me too...

[fatmobile]

Is the 1.9 head taller?
 Do I need 1.9 injector lines or will the 1.6 injector lines work with a 1.9 head?
 I have the 1.7 TD engine I built. It has a hydro head,... the 1.6 cam has pieces missing and the prechambers have cracks.
 Since the pistons are 80mm across the compression is higher.
 I picked up a 1.9 head that is in great shape and might work well with the higher compression.

[RabbitJockey]

the 1.9 block is taller the head is the same other than the ports and valves.  use the injector lines to match the injectors you use.  if you use a 1.6 pump with 1.6 injectors the 1.6 lines will fit like stock, but any other combo will probably require bending since the delivery valves of an aaz pump are longer the lines are shaped differently, and 1.9 injectors are taller, along with the lines being taller to compensate for the taller block.

[fatmobile]

Thanks, that'll make it easier.