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Engine Specific Info and Questions => IDI Engine => Topic started by: ISBjornen on August 04, 2007, 09:49:01 am
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What is the advantage of drilling from the original 1,9 to 2,1 liter?
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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.
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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.
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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
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I know of a 2.0L down this way that is being built for a rabbit pickup :D
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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
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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:
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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:
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My Fiat do have 82,6mm pistons, wanna buy a set. :wink:
Greetz, Benjamin
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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?
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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
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My pistons are first oversize and that will give a hair less than 2 liters. I think it will give slightly more torque.
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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.
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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:
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non of the 4 AAZ enigens i have worked whit have it.