1.8T pistons in a 16v motor

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

First off, I wouldn't assume the 1.8T pistons are forged. Forged pistons are
rare in production cars and some of the 1.8T's even have cast cranks. Just
because the engine is turbo doesn't mean the piston is forged. It may be
stronger since it's designed for boost, but not necessarily forged.
Second, that will be one effed up combustion chamber. The cylinder head is
the top of the chamber and the piston is the bottom and they are designed to
provide a total volume that burns quickly with high resistance to
detonation. When you mix and match you will most likely end up with a poor
combustion chamber more likely to detonate.
Third, have you thought about valve clearance? The 16V has a pretty large
valve clearance notch that is missing in the 1.8T piston.

I've been keeping an eye on your posts ever since you started talking about
Megasquirt 6 months ago.
I've got one piece of advice. Learn to walk before you try to run!
just my .02
Dan

----- Original Message -----
From: "Derrick Floyd" <derrickmd18@verizon.net>
To: "scirocco mailing list" <scirocco-l@scirocco.org>
Sent: Sunday, September 21, 2003 9:46 PM
Subject: 1.8T pistons in a 16v motor


bore stroke disp rod wrist pin
16v 81.0 86.4 1781 48 144 20 33.4 -5 220 10:1
20v 81.0 86.4 1781 48 144 22 32.8 0.0 220 9.15:1
think they will fit.



I wanted to build a motor with stock vw parts that I can boost to 350hp.
Because the way I look at it a 16v bottom end has forged crank, some BIG boy
rods and cast pistons. so If I can use 1.8T forged pistons I'll have a
somewhat STRONG bottomend. so if it works the bottomend is done and I can
send the head out to get P&P and some valve springs and some turbo cams and
hit Killa up for a t3/t4 with the biggest wheel I can get in it and I'll
have a motor that is capable of running 11 sec all day long with stock vw
parts. My biggest problem is if they will fit. I mean anything 9:5.1 and
under will be suitable for me. I have a TEC 2 right now about to go into a
stock 16v motor.
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