Tdi build

[Dieselboy]

Hello guys wondering where a good machine shop in eastern pa is that can bore out an ALH block.

 

[Dieselboy]

Hello im looking at ASV pistons or BHW T4 81mm pistons for my alh i am building . Which are best ? Planning on using ROSTEN rods.

 

[tiexgrr]

Why spend the money boring out the ALH? You'll make more power, with less money doing a tune, and increasing the nozzle size.

Not to mention you would be completely changing the compression ratio by increasing the cylinder volume.

Increased volume doesn't always mean more power.

 

[A5INKY]

... you would be completely changing the compression ratio by increasing the cylinder volume...

This is determined by the pistons used when the crank stays the same. The CR could be maintained, or reduced to mitigate peak cylinder pressures in a high boost build.

... Increased volume doesn't always mean more power.

All else being equal? Yes it does.

 

[Dieselboy]

I bought the engine having a broken cam so im rebuilding the complete engine i probably have to go at least with oversized pistons or i could bore it out and go bigger i have a gt22v turbo i want to put on

 

[Fix_Until_Broke]

Are the bores damaged? If not, no need to bore them out.

 

[Dieselboy]

They have a little ridge from wear

 

[Dieselboy]

Whats the differents between alh pistons and asv pistons?

 

[turbocharged798]

ASVs have cooling channels in them like all PD pistons.

 

[Dieselboy]

Ok i get it thank you ! so they would be a good upgrade !

 

[veedubgolf00]

I'd like to know the same ill be getting a alh bored for bhw pistons.

 

[Dieselboy]

Ok i was going to go with Bhw but i think oversized asv will be big enough .

 

[loudspl]

BHWs or Crafters are a better choice for future buildup of an ALH/ASV

I had the +5mm ASVs. Now running BHWs. More displacement is always better as long as cylinder walls don't get too thin

You can get BHWs cheap now. Check out the deal Jim found here:

http://forums.tdiclub.com/showthread.php?t=377418

 

[Dieselboy]

BHWs or Crafters are a better choice for future buildup of an ALH/ASV

I had the +5mm ASVs. Now running BHWs. More displacement is always better as long as cylinder walls don't get too thin

You can get BHWs cheap now. Check out the deal Jim found here:

http://forums.tdiclub.com/showthread.php?t=377418

So it would be worth boring my block and putting in the bhw pistons?

 

[rspring]

Be careful about valve clearance with those pistons and an ALH head.

 

[loudspl]

So it would be worth boring my block and putting in the bhw pistons?

Depends on budget and goals..

BHWs are ~ 18.5:1 CR but will give you more displacement than using ASVs

 

[veedubgolf00]

The protrusion on a alh and bhw piston are the same I thought. Just wider?

 

[Dieselboy]

what numbers can the stock alh crank take? thanks guys

 

[Fix_Until_Broke]

I can't remember hearing of one failing - ever?

Rods will bend, heads will lift, etc, but I don't think I've ever heard of anyone breaking a TDI crankshaft.

 

[loudspl]

I've compressed aftermarket rods with N2O, spun bearings and blew a custom al intake manifold almost in half. No matter the abuse, the crank remained unscathed..

These cranks can survive WWIII

 

[Dieselboy]

Awesome cause im getting bhw 2.0l pistons & IE rods !!

 

[Dieselboy]

Anybody every buy pistons from Bora Parts? Im looking at the 81mm Pistons. Do those have the oil cooling ports?