19mm Gudgeon pin rods and standard pistons

[ibiza_95]

I have a set of forged rods, with the 19mm wrist pins, and a set of standard pistons to suit.

While i got these at a decent price im left wondering whether i should have waited and got some of the 20mm pinned rods. The pistons are standard units and came attached to the rods.

Can anyone tell me what the pistons will be good to see power wise and whether the 19mm pinned rods are weaker than the 20mm ones? if so by how much? and im not being petty am i with the pin size?

I know the weakest point of the engine is the rods hence me opting for the forged items, I only want to be building the engine once more now, 3 times is enough for me, but depending what power standard pistons can take and the difference in wrist pins will either mean i hold out for some stronger pistons, put them in as they are, or sell the 19mm pinned rods and buy a set of 20mm rods and stronger pistons.

Thanks for any info and advice.

EDIT: This is all on a 1.8T engine running k04 RR'd at 258bhp with nitrous ontop of that

 

[ibiza_95]

bumpoting please

 

[ibizacupra]

I woudl think they would be ok.. to the power levels you have said

 

[ibiza_95]

Cheers Bill
What kind of power do you think would be a max for the forged rods and standard pistons??

 

[RobDon]

19mm forged rods have been to over 400bhp many times, so have stock pistons.

 

[ibiza_95]

ah sweet thats great news
it was just that i could rebuild the engine and then up the nitrous a bit, so i can safely do this then

Thanks a lot for that

 

[ibizacupra]

Cheers Bill
What kind of power do you think would be a max for the forged rods and standard pistons??

400bhp level with suitable mapping to suit