1,9 to 2,1 liter

[ISBjornen]

What is the advantage of drilling from the original 1,9 to 2,1 liter?

[jtanguay]

will the block even support that?  it would be higher displacement, more power, more fuel consumption, and more problems down the road due to change in compression etc.

[Black Smokin' Diesel]

will the block even support that?  it would be higher displacement, more power, more fuel consumption, and more problems down the road due to change in compression etc.

I don't think compression will change, well the compression ratio I mean. Quite frankly, I don't think you can bore it to 2.1. The cylinder walls are gonna be way too thin to support any major power. You can't bore a diesel that much like you can on a gasser.

[Benjamin]

how much space is there with a 1.9 and a 1.6 between 2 cilinders? i mean how tick is the wall. if its smaller, maybe we realy realy do need more better solutions for headgasketproblems

Greetz, Benjamin

[Slave2School]

I know of a 2.0L down this way that is being built for a rabbit pickup

[scopefrfd]

using the pistons from an audi 2.5 tdi will yield a 2.0L.  You need 83mm pistons to get 2067cc aka a 2.1L.  That's pretty thin between the cylinders...gassers have taken the block out to 83.5mm

[jtanguay]

will the block even support that?  it would be higher displacement, more power, more fuel consumption, and more problems down the road due to change in compression etc.

I don't think compression will change, well the compression ratio I mean. Quite frankly, I don't think you can bore it to 2.1. The cylinder walls are gonna be way too thin to support any major power. You can't bore a diesel that much like you can on a gasser.

if you can find pistons that are exactly the same as required to have the same compression ratio then i guess you're right, but good luck finding it!  :lol:

[Black Smokin' Diesel]

The compression ratio does indeed go up when overboring due to the fact that the combustion chamber (the 1 part of the ratio) remains the same yet the volume of the cylinder (the bigger number) increases.

Andrew

Geez major brain fart... you're right. I was only thinking about piston travel (which doesn't change) but didn't compensate for the added volume :oops:

[Benjamin]

My Fiat do have 82,6mm pistons, wanna buy a set.  :wink:

Greetz, Benjamin

[ISBjornen]

how big i the audii 2,5tdi pistons? im thinking about them, im also planing to try a 1z top and block with oil cooling on the pistons. but whit my 12 mekanikal pump. and 2 step injkectors

ideas?

[Benjamin]

this guy use the 2.5pistons
http://www.centralvwaudi.com/tdi.htm

i think 2step injectors are good for economical, but i think fot best perfomance you better use 1step.

Greetz, Benjamin

[stewardc]

My pistons are first oversize and that will give a hair less than 2 liters. I think it will give slightly more torque.

[ISBjornen]

I will be running 2 step ionjectors, will alos use a 1Z top butt whit the aaz injector pump, maby ill use the 1Z bottom becuse of the oil cooling on the pistons.

[stewardc]

maby ill use the 1Z bottom becuse of the oil cooling on the pistons.

All turbodiesels have oil cooling on the pistons, and if you use a 1Z top, you gotta use a 1Z bottom :wink:

[ISBjornen]

non of the 4 AAZ enigens i have worked whit have it.