anyone forged their fabia? and if so where did they buy the parts?

Rosten rods only.  Bought from Rosten direct (Norway) - were about £500.  Beyond that, nothing forged and nothing really needs it.

Why would you forge it all Steve, you won't be turning any extra RPM?

 

I know you ain't no engineer but JEEZIS

Arent diesels forged as standard.

Arent diesels forged as standard.

 

Technically I guess most components are forged in some form.  But the rods are the only thing I risk bending, especially with a 5200rpm redline (to be raised to 5400 soon I think)

im talking a rebore and 2.0ltr pistons

You forge a petrol engine so you can fit wild cams or big turbos which require you turn significantly more RPM than standard, it's RPM that smashes bottom ends up.

 

With respect Mr. Utopia, 5400 RPM ain't very much, this is why the standard internals are fine on diesels, even my lowly 1.4 turns 6500 RPM, a tuned standard ABF is safe to 7500 RPM but needs forged pistons and rods for more.

 

The rods won't bend due to combustion pressure, standard rods would probably be ok in your mongrel but forged rods are a reasonable precaution and you save a bit of reciprocating mass to boot.

 

Steve, stop thinking like a dumb petrolhead with an Amex Platinum card.

im talking a rebore and 2.0ltr pistons

 

Don't bore it out, you'll make the cylinder walls even thinner and even more likely to crack, stop talking and start thinking.

 

In which world do you imaging a 5% capacity increase is going to make any difference except to make it MORE unreliable?

Edited 15 July, 201510 yr by sepulchrave

Steve, stop thinking like a dumb petrolhead with an Amex Platinum card.

 

Given the penetration of AMEX over here that line sounds like its a quote from an American film :P

 

AMEX acceptance is pretty poor here, I have a habit of getting my MasterCard out of my wallet at the same time in places I've not used the AMEX before.

You forge a petrol engine so you can fit wild cams or big turbos which require you turn significantly more RPM than standard, it's RPM that smashes bottom ends up.

 

The rods won't bend due to combustion pressure, .

A few people with stud and nut head kits have bent rods on these PD engines running high boost and big turbos from combustion pressure,as where the head would have lifted it can't anymore.

also big turbo/boost/power Evo engines bend standard rods,not when maxing out the revs though,they do it mid range when the turbo is putting in the most boost?

I thought the mixture and rotating mass was the biggest limit of RPM as well of rods of course, only so far you can go.

I was thinking of 2 litre rebore on mine but apparently little difference so best to focus on top end

I thought the mixture and rotating mass was the biggest limit of RPM as well of rods of course, only so far you can go.

 

On a diesel the limit is the speed of fuel combustion which is much slower than a petrol.

On a diesel the limit is the speed of fuel combustion which is much slower than a petrol.

 

This was the reason I was told going much over 5000rpm is pointless as the efficiency of the combustion drops off like a stone and power will drop off markedly.  I guess its all down to tune and turbo choice and how the engine fuels at the top end as to how much useful extra rev band you can have.

I found the extra revs (limited to 5555) helped in the early gears. Once into 4th then it wasnt as effective, as jason says performance drops a fair bit.