Hi guy's, I've got myself thinking about this business of stroking my AUM with 2.0 TFSI internals. And as I have never done it before I was hoping I might be able to ask the more knowledgeable out there for some info on the complications that are involved.Are there any build threads out there any one could link me to.? All the very best guy's O.T.
go see Bill @ Bagder 5, if he hasn't upsat you or put you off to much thn he's a good builder if not a little hard work. Theres some 600+ hp builds in his workshop.
You need a 2.0 TFSI crankshaft or one out of a ALT 2.0 20v engine. You need 20v 82.5/83mm aftermarket pistons. Mahle do these with rings. No issues with oil jet clearance ( more than 050 though) I have found. Block bored to match pistons. You need H section/I sections rods. IE do them as do PEC. You need a new 1.8T oil pump drive gear - VW/TPS New engine bearings - Various suppliers. New oil pump and pick up. Top end is as any other 1.8T build depending on what you are building. Sambo on here as built them, Dan of dubshack as built them, I have built them as has Badger 5.
Hi guy's many, many thanks for the input. And apologies for my late return. This sounds great and I'm very interested. Rather than get aftermarket pistons could I not bore the block 82.5 and use the TFSI pistons with perhaps a sensible set of rods? Any thoughts on it from you guy's would be invaluable. Many thanks and all the very best O.T.
Fantastic Toyotec, thankyou. Well if it has to be aftermarket pistons then I might as well go for the 83's. Any idea on how much the Mahle units are? Out of interest, what is the issue with the TFSI pistons and port injection,what is it that's different about them? That's a really interesting point and I didn't know that. Also, and I do apologise for the barrage of questions. After doing a bit of reading last night I see that the TDI cranks at 95.5mm can also be used. Do Mahle do a suitable piston for this stroke to? All the very best and many many thanks for this great advise. O.T.
I have the Mahle Powerpack 83mm pistons for my build. They are typically $680-725 USD. I got mine from Issam at INA Engineering in Canada. The ALH crank (95.5) with 83mm pistons achieves 2067 or 2.1L displacement. This is what I have for my build. I went with 144x20 IE Tuscan rods and will use a 20V 06A block. I believe some people have run the ALH diesel block as well which achieves a slightly better rod ratio, but the rod ratio with the setup I have is still within acceptable range and has been proven to make very good power and remain reliable if properly built and maintained. JE pistons are also very popular because they have so many different configurations. I've heard from several reliable sources that the JE's tend to "slap" when cold, vs the Mahle Powerpak pistons tend to run quieter. Hope that helps! Cheers, Isaac
This is great Isaac,exactly the same type build I was looking at. It's great that you mentioned the rod ratio as I was thinking about this but as you say, it's within sensible limits, albeit at the lower end of it. I see also that a c.r. of 8.5:1 is achievable with this conversion.Great.... I had also heard this with JE and over here in the uk it does get cold. All the very best and many thanks O.T.
Depending on how much boost you plan to run you might consider the 9.5:1 CR ones as well. Best of luck! Cheers, Isaac
Mahle pistons can be had from Regal Motorsport or Bill Brockbank of Badger 5. Those establishments also sell matching rods. PEC also does components suitable for your stroker. Obviously IE in the US sell all the components. TFSI pistons have tumble patterns built into the piston based on wall guided high pressure injection occurring into the cylinder near the compression stroke. Such pistons are not ideal to create a near homogeneous mix on an engine that has fuel injected behind the intake valve on the suction stroke. Have a look at reputable companies such as IE, Regal, Badeger 5 for more information. Yes you can for a 2.1 engine, although if you did experience the response of a well built 2008 cc "stroker" I doubt you will be bothered.
Many,many thanks for the helpful info and advise guy's. I have a much better idea of how to proceed now. And thanks for the heads up on the pistons Toyotec. All the very best O.T.
have someone setup with 83mm Mahle pistons and TDI crank 95.5mm? so 2067cc..for JE pistons I have seen 8,5:1 and 9,5:1 ratios, for Mahle pistons are available too? What you recommended?
