Steel Block With 83 Bore?

[Saveit 0]

Hi there,

 

I am going to build an 8v 1.6 race engine and i would like to use a steel block due to durability. But i cant seem to find a 83 mm bore steel block. The steel block from a 306 gti is 86 mm bore. Doesnt a 83mm steel block exist?

 

Stefan

[Mandic 0]

1.9 TD

 

Cheers

 

Ziga

[Saveit 0]

But what about oil and water holes and so on when its a diesel? Is putting a 1.6 gti head on plug and play or what?

[Mandic 0]

It's a XU block, so You can mix & match it with other XU components.

 

Water pump location is the same as on any other XU block (except XU11D).

 

 

Cheers

 

Ziga

[welshpug 1,662]

Hi there,

 

I am going to build an 8v 1.6 race engine and i would like to use a steel block due to durability. But i cant seem to find a 83 mm bore steel block. The steel block from a 306 gti is 86 mm bore. Doesnt a 83mm steel block exist?

 

Stefan

 

 

from what I've heard the iron blocks do not wear as well as the iron liner alloy units, don't forget the extra weight of the block too....

[B1ack_Mi16 67]

from what I've heard the iron blocks do not wear as well as the iron liner alloy units, don't forget the extra weight of the block too....

 

Bore wear is usually a big problem on iron blocks from petrol engines.

 

On the diesels however, it seem to be almost no bore wear at all.

 

I think this might be due to lower revs and the insanely thick piston rings which mean the contact presseure between the piston ring and cylinder probably will be less than on the petrol (however cyl pressure is higher so not sure how much this will affect the ring / cylinder pressure).

[Saveit 0]

Very interesting

[B1ack_Mi16 67]

Very interesting

 

Another possibility is that the diesel engine never will be exposed for bore wash the same way that the petrol engine, so oil film may not wash away as easily.

 

I think this actually make sense

[Tom Fenton 1,542]

Diesel won't wash the bores like petrol will, coupled with low revs and also lower burn temperature means less wear to diesel bores usually.

[James_R 3]

On the short stroke 1.6 engine's I've not seen any bad bore wear even on a 138k engine that had a couple of years of trackdays thrown in, The stroke doens't generate enough lateral loading on the liners to cause the wear unlike the 88mm stroke (1905cc) set up. I see no advantage to using a drain cover block, only disadvantages.

Edited April 20, 2009 by James_R

[Saveit 0]

The engine will be used for high reving Endurance Championship track racing. Therefore i would think that a steel block would be the best option? But what do you feel - is the alloy block just as good for this particular purpose?

[Hilgie 16 2 Cars]

I'd choose the steel 1.9TD block.

[Batfink 201]

The engine will be used for high reving Endurance Championship track racing. Therefore i would think that a steel block would be the best option? But what do you feel - is the alloy block just as good for this particular purpose?

 

Use an alloy block with mi16 piston liners.

[Saveit 0]

Are mi16 liners more durable?

[B1ack_Mi16 67]

Are mi16 liners more durable?

 

Yes they have extra webbing (apart from on the sides where it's machined of course).

Extra webbing gives greater surface area -> better cooling etc.

 

However the weakest point will still be on the machined part, which I can't see beeing any stronger than on a normal 8v liner though.

 

Iron block is a safe bet, that said I don't find the alloy blocks bad either.

My 405 Mi16 has rounded 400kkm like 248k miles on standard bottom end, only thing I've done is changing HG and valve seals 8 years ago at approx 250kkm.

[Saveit 0]

Sadly 205 1.9 TD is hard to find here in Denmark. Is this engine being used in any other peugeot/citroen models?

[James_R 3]

I'd use the alloy block, it's significantly lighter (as in XU10 engine is as heavy as a whole alloy block with gearbox!!) I'm just finishing a 1760cc 8v and it's very light indeed!!

 

I've also not seen a 1600 fail from cracked liners etc...