I was browsing through a Volksworld mag and noticed somewhere selling 'recon' watercooled engines with oversize cyls & pistons, giving a displacement of around 2 litres.
Now are they (or me!) getting their air and water mixed up? If not, where can I get a set? Are they any good or are they dodgy thinwall jobbies like those sets you used to be able to get for beetles that lasted a few thousand miles?
I'm sure they'd be more readily available if they were any good or even existed!
Go westy in the states do a 2.2waterboxer engine in which they go up from 94mm to 96mm with re-bored liners, think they use wiseco pistons.
supposedly a bit torquier than a 2.1, spose if you could source the pistons and get the liners bored properly, you could do similar. dont know if they have to modify the pistons tho, or fit different dia. bushes in the conrod small end as the piston pin is bigger, if i remember right.
Not a lot of point on a 1.9.. better off turning it into a 2.1 DG with 2.1 crank..
No mods are needed for the GW set up..
I may be offering a 2.2L kit soon, if demand is there.... but at the mo.. there isnt..
A test bed engine is being assembled at the mo...
If bigger bore then need more deck height or bigger combustion chamber to keep compression ratio same as stock.... Or will it still run on normal octane petrol?... or need higher octane?... Petrol is expensive enough as it is!
Hummm.... Wonder if LPG will handle higher compression ratio then petrol????
E D I T: LPG ± 110 octane. Regular-grade petrol ± 92 octane and premium-grade petrol ± 95 octane
Conclusion: Should be able to run higher compression on LPG
Last edited by lloyd on 10 Jun 2007, 14:49, edited 1 time in total.
Thanks Gary. Just edited my post after doing a little google.
This has got me thinking about a 1.9 with 2.1 crank and piston/liners running on LPG. Don't know it would work or not, but 92 to 110 should allow a considerable increase in compression ratio before pre-ignition sets in. Problem may be burning valves.... Think it's time to talk to LPG Guru at Gasure
Its actually a lot simpler than you all think..
VW didnt go to much length to increase the cc..
Only early (pre 85) cases wont take the 2.1 crank without clearance and the bearing availability issue is a pain, not to mention the stud issue.. much better starting off with a later case (part no ends with a B)
Rods are the same and DG pistons can be re used if you take 3mm off the top.. barrels will need a rehone if not worn to remove any potential ridge the piston rings can get hung up on...
Fit an oil cooler and use all the DG exterior parts... = instant hill climbing ablity... same running costs but travelling much easier.. Dont know why vw didnt just do a 2.1 DG....
I am running a 2.1DJ "DG".... on LPG... and 98UL at 10deg BTDC timing.. but a normal 2.1 dg will run 95ul at 5 deg.. poss even 7.5 deg...
Pick yerslf up a dead 2.1... or speak to a breaker that may have a 2.1 crank about.. Or buy a new one from VW... not as dear as one might think..
As for "real stroker cranks" yes they are available.. but its not a simple job...
I think the last stroker crank I bought was about £450, that was for an Aircooled engine, about 10 years back. Much more work than meets the eye! I'll try VW, but I still have the prob that my spare engine is the early type of case.
