So, before i go ahead with my 1341 build, does anyone know the specs for pistons in a 1w build?
Someone on here has had one for sale for a long time, can't remember who now, all I know is they're 1500cc or thereabouts. Tried ETKA then googling part numbers?
I did ask him, but it's been built up now so presume he couldn't find out. I guess i could pull the ones out of my 1w head and measure them? The diameter isn't a problem, think the height is the crucial difference between those and standard g40 ones.
Accralite used to specify compression height on their website for the 77mm "1W" G40 pistons
I just got me some custom JE-Pistons, 8.5:1 CR with 77 mm bore
found some info in an old spread sheet
Part No: 1245xx77
Make: VW
Model: G40 Supercharged
Bore size (dia mm): 77
Comp height (mm): 38
Intruder (height mm):
Bowl (depth mm): 7
Pin size (dia mm): 20
Crown thickness: 6
Accralite Ring Part No: a77000/15-15-25
Pin Part No: 5071
Distance between bosses: As forged
Piston weight (bare):
|
PLEASE ENTER THE BORE DIAMETER IN MILLIMETRES 77
PLEASE ENTER THE STROKE IN MILLIMETRES 79.1
PLEASE ENTER THE NUMBER OF CYLINDERS 4
PLEASE ENTER THE HEAD GASKET & SQUISH ALLOWANCE (MM) 1.4
PLEASE ENTER THE VOLUME OF CYLINDER HEAD (IN C.Cs) 0
PLEASE ENTER THE COMPRESSION RATIO REQUIRED (??) TO 1 9
SWEPT VOLUME PER CYLINDER (IN C.Cs) 368.34
ENGINE CAPACITY (IN C.Cs) 1473.36
EFFECTIVE VOLUME OF HEAD GASKET & SQUISH (C.Cs) 6.52
COMPRESSED VOLUME REQUIRED PER CYLINDER 46.04
VOLUME REQUIRED PER PISTON ~ BOWL VOLUME 39.52
Here's an old for sale post containing a load of 1W info;
https://www.polog40.co.uk/forum/index.php?topic=2290.0
Here's a link to Wikipedia with information; (search the page for 1w to jump straight to it)
engine configuration & engine displacement
inline four-cylinder (R4/I4) diesel engine; 1,391 cubic centimetres (84.9 cu in); bore/stroke 75 / 78.7 mm, 347.75 cc per cylinder, compression ratio: 22.3:1
https://en.wikipedia.org/wiki/List_of_discontinued_Volkswagen_Group_diesel_engines