Bigger bottom end....

[dani1326]

Right iv found out my engine has been bodged, the cam nuts have been over tightened and striped the threds so the cam could of bounced out but hoping a heli-coil kit will sort that as ther only need to be 6nm and 90*

 but also found out the pistons could be almost dead

What do I need for a larger bottom end and to forge it?? I really need your help with this people, specs, what the parts come out of well everything

Thanks for your help

( I have had a search and seen I need a W1 crank and 77mm forged pistons but what do they come out of??? And do I use the G40 bottom end or another one?? ) 

or is there an easier one where I wont need to find a crank??

[scotsjohn]

Crank's from 1.3/1.4 diesel engines from VW, Seat etc. Accralite forged pistons readily available on E-bay. Your PY block can be bored to suit. As usual in life you just missed the sale of the century. A 1.4 block,crank and pistons sold for £800 ? See parts for sale. The advantage of the 1W block is it's fitted with additional oil supply to the cylinders.  Sure there's a lot more on this in FAQ's either here or on CP.

[dani1326]

Crank's from 1.3/1.4 diesel engines from VW, Seat etc. Accralite forged pistons readily available on E-bay. Your PY block can be bored to suit. As usual in life you just missed the sale of the century. A 1.4 block,crank and pistons sold for £800 ? See parts for sale. The advantage of the 1W block is it's fitted with additional oil supply to the cylinders.  Sure there's a lot more on this in FAQ's either here or on CP.

Iv had a good look round but can only find dribz and drabs

So i will need mine boring out to the spec of my pistons... Was hoping I could of used another polo bottom end but hay never mind lol

[hayesey]

what is wrong with your current bottom end?

you only need a 1W crank etc.. if you are wanting to increase the stroke.  If you just want to increase the bore then use either Wossner or Accralite 77mm forged pistons (something like £500-£600 for a set with rings).  Then you need to get the block bored, just buy the pistons first and take them and the block to whatever machine shop you are going to use.  

That's all you really need but you will probably also want to replace all the bearings and the oil pump at the same time and all the bottom end seals & gaskets.

You need to factor in about £1000 for this assuming you are going to do most of the work yourself.  I'd probably double or more that if you are also wanting to use a 1W crank to increase stroke.

[dani1326]

Long story but I don't mind about increasing the stroke just won't to make the bores new,

I'll be doing all the work except the boring out....

So forge pistons, and bore out my block any other parts I should replace??

[hayesey]

well, oil pump, bearings, seals and gaskets as I've mentioned already. There's £200-£250 worth of stuff there.

[dani1326]

well, oil pump, bearings, seals and gaskets as I've mentioned already. There's £200-£250 worth of stuff there.

i dont mind the price i just wont it to be done how it should be.... thanks for all you help and advice

[PeteG40]

i have a bottom end with 20k on since new rings/bearings/oil pump.  Just had bores rehoned, new gaskets.

Pete

[dani1326]

i have a bottom end with 20k on since new rings/bearings/oil pump.  Just had bores rehoned, new gaskets.

Pete

what bore is it as im going for more capasity??

[PeteG40]

just a stock bottom end. 1272cc don't want much for it - max you can go is 1341cc with an over bore and new pistons and 1473cc with a diesel 1w crank and new pistons.

depends how expensive you want to go.

for a 1341 expect to pay the following

£550 pistons
£100 boring
£100 oil pump
£250 bearings and gaskets bolts etc

so £1000 +labour for the bottom end

head refurb £150 on a stock head
headgasket adn bolts, coolant oil etc £70 ish

So all in a refurbed engine with increased bottom end capacity to 1341cc would be about £1250 i'd say if you were doing it yourself.  add about £400 on top again to go 1473 as you need a crank/block (200-300?, head bolt holes boring out, crank balancing £100 - pistons can be dearer too)

Expect about 3 full days labour I'd imagine for that.

Also a stock head won't net the benefits of increased capacity - your probably better off adding another £150 for porting.

so £1800+labour ish.  At £40+vat an hour=£1k labour.

So 1w walk in/out prince with a flowed head £2.8k i'd guess. (though new clutch for bottom end, lightened flywheel etc would increase cost)

[youngprodigys]

i have for sale a 1W bottom end and crank. i want £180 for the it and it comes with some G40 rods- just add pistons and bore  for a 1473 setup. the block can also be used on its own (i want £100 for block)with a standard G40 crank and pistons to add oil squirters to your setup or if bored out a 1341 with oil squirters.
or if you just want the 1W 1.4 crank thats also £100 only for sale after i sell the block.

im having a lambda bose welded to the block soon so it will be G40 ready.

perfect if you are wanting a block to bore out or if you need a new bottom end.

[dani1326]

i have for sale a 1W bottom end and crank. i want £180 for the it and it comes with some G40 rods- just add pistons and bore  for a 1473 setup. the block can also be used on its own (i want £100 for block)with a standard G40 crank and pistons to add oil squirters to your setup or if bored out a 1341 with oil squirters.
or if you just want the 1W 1.4 crank thats also £100 only for sale after i sell the block.

im having a lambda bose welded to the block soon so it will be G40 ready.

perfect if you are wanting a block to bore out or if you need a new bottom end.

I'll have it pal pm me your number please

[dani1326]

What will i need to create a 1W 1473 g40 and where will I find them??

[PeteG40]

accralite pistons from accralite for the stroked g40 conversion

[dani1326]

accralite pistons from accralite for the stroked g40 conversion

http://www.accralite.com/accralite/index1.htm
Is it the bottom one??

Also do I use the 1.4 bottom end or the g40??