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Engine Specific Info and Questions => IDI Engine => Topic started by: Demons UK on September 17, 2007, 11:33:29 pm

Title: 1.9 head?
Post by: Demons UK on September 17, 2007, 11:33:29 pm

Hey,

I'm thinking of putting the 1.9 head onto my GTD..

I'd be running everything the same apart from the head so would there be any advantages or dis-advantages?

cheers

Title: 1.9 head?
Post by: Stanton on September 18, 2007, 03:22:06 am

i was thinking the same with the bottom end  :)

is it possible... i have an AAZ gasket on the SB anyway... so will i gain from the AAZ bottom?

Title: 1.9 head?
Post by: Demons UK on September 18, 2007, 09:59:29 am

Is the any advantage of any top/bottom/full 1.9 engine over the GTD?

Title: 1.9 head?
Post by: jtanguay on September 18, 2007, 12:00:20 pm

do some searches on 1.9 head with 1.6 block.  the 1.9 head flows better, but the compression ratio will drop enough to make cold starts smokey and rough, even with a good engine.  Chrissev and Malone have both tried it.

as for going with a 1.9 block and a 1.6 head, the head will be the bottleneck.  definitely a lot more torque than with the 1.6 though.  wonder if the CR would go up, and if so by how much?

Title: 1.9 head?
Post by: RabbitJockey on September 18, 2007, 08:17:01 pm

just for the record chrisrevs franken engine had bent valves and such which is why it smoked so bad on cold starts.  malone really made alot of points that cold starting wasn't bad on his car and he ran a 3 notch hg.

Title: 1.9 head?
Post by: 935racer on September 18, 2007, 09:55:56 pm

I've built 2, malones and another customers, cold starting is a bit of a problem, malones motor had some weird stuff go on, I tore apart his old head about a month ago, and I think i know why it was smoking like a chimney, the valve guide seals pretty much disintegrated, how or why I don't know, doesn't make any sense, I put brand new ones in when I rebuilt the head. Regardless his motor would still miss on cold start, he had even lower compression due to deck modifications on the head.

The other customers engine had about 240,000 kms on it, it also had a hard time starting in the cold, about the same as malones, didn't smoke as bad, but still smoked white at idle until it warmed up.

Both sounded BADASS though :twisted:

Title: 1.9 head?
Post by: Gearhead on September 19, 2007, 03:03:31 pm

When you say "cold starting" what do you mean cold?  I live in Georgia, and it RARELY gets below 20F in the winter.  Is it possible to start this configuration in this type weather?  Most of the year it's doesn't get below 40F.  My Powerstroke smokes a bit when it's 20F out.

Title: 1.9 head?
Post by: RabbitJockey on September 20, 2007, 07:39:57 pm

all of my 1.6's smoke white.  i can't wait to get mine together.

Title: aaz head options
Post by: derek510galaxy on October 05, 2007, 10:04:58 pm

I'm also considering the aaz head for my 1.6 TD rebuild. Has anyone had any experience with aftermarket heads? The VW heads are obviously rare here in the US, especially far from Canada. I'd like to know if anyone has used one (and what brand) successfully in a modified powerplant, i.e porting and high boost.
Thanks, Derek