1.9L TDI crankshaft Q.

[jdbubb at ix.netcom.com (Dan Bubb)]

Off the top of my head......
The longer stroke will push the piston higher in the bore by half of the difference in stroke. Stock
pistons already come as close to the head as is feasible, so one of three things needs to happen.
1. Shorter rods by half the difference in stroke. (95.5 (I think) -92.8)/2=1.35mm
2. custom pistons with the pin located 1.35 mm higher towards the crown.
3. machine 1.35 mm off the tops of the pistons. This sounds easy, but the top ring is then 1.35mm
closer to the fire and, especailly in a turbo engine, might not be a good idea.

Plus I bet the block and perhaps the intermediate shaft will need to be clearanced to clear the
connecting rods, but this is just a guess on my part.

I'm guessing that if you're putting 8V pistons under a 16V head then you're thinking low compression
and TURBO!
If that's the case, I'd blow off the TDI crank and let the turbo boost make the torque.

Dan

----- Original Message -----
From: "marc_scirocco" <marc_scirocco@sympatico.ca>
To: "'Scirocco-L'" <scirocco-l@scirocco.org>
Sent: Tuesday, December 28, 2004 5:19 PM
Subject: 1.9L TDI crankshaft Q.


> I have the opportunity to buy a 1.9L TDI crankshaft.
>
> I am building a 9A motor with 83mm 8V pistons and stock rods.
>
> With a 2.1L motor, the Scirocco would have lots of TORQUE...
>
> What is involved to fit this longer stroke crankshaft?
>
> Any experience, opinions, hersay?
>
> Cheers.
>
> Marc
> '83 Scirocco
>
>
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